73 amateur radio today '91

FEBRUARY 1991ISSUE #365 USA $2.95 CAN$3.95 A WGE Publication uildthi 10 i ®r reatUHFNHF You Can Build on • Private Patch }Z ~~~~~~~~~ MU LTI-M OD E INTERC ONNECT ... , L ' J ~- ~ CONNECT SYSTEMS INC. • lit • • NOISE OTMf llMT C,Q L-POWER SIMPLY CONNECT PRIVATE PATCH V TO THE MIC AND SPEAKER JACK OF YOUR BASE ... AND YOUR MOBILE BECOMES A PHONE! PRIVATE PATCH V is the mo st versatile interco nnect available today. A built·in keyboa rd and d igital display give the user full control of all modes and features . PRIVATE PATCH V can be your simple x patch today and your repeater controller with duplex autopat ch tomorrow . When you compare the features and ease of installation, nothing else comes c lose ! • FOUR SELECTABLE OPERATING MODES 1. VO X ENHANCED SAMPLING: A simplex mode permitting mobile break-in . 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REPEATER CONTROLLER: Will convert any receiver and Iransmitter into a full featured repealer, ONE YEAR WARRANTY Parts & Labor • BUILT·IN PROGRAMMING KEYBOARD AND DISPLAY • 90 NUMBER SPEED-DIALER • • LAST NUMBER REDIAL • AUTOMATIC DIALTONEIBUSY DISCONNECT • USER PROGRAMMABLE CW 10 • HOOKFLASH • REGENERATED TONE OR PULSE DIALOUT • TOLL RESTRICT • 1·800 DIALING • CONNECT CODE Select • plus 1-4 digits. Any combination. • TOLL OVERRIDE CONNECT CODE Select • plus 1-4 digits. Any combination. CONNECT SYSTEMS INC. 2064 Eastman Ave., #113 Ventura. CA 93003 Phone (805) 642-7184 FAX (805) 642-7271 TOLL FREE 1·800·545·1349 CIRCLE 1 2 ON RUD ER S ERVICE CARD I I I leave my idea now wit h you. can it? I agree with you. hoping that maybe you can get somtI 01 these tired old gHzers off their butts. And do the " Ioeals" support their local dealers? Not by a long shott Most folks around here woul d rather mail-order their gear to save the sales tax. CQWW. I think. FPO NY Three months ago I purchased the new 1990 ARRL Handbootr at the cover price 01 $23. bu t we lell incapable and utterIy powerless 10 even try 10 do anything abotlt it. l've requested the writing quroennee you 've established and intend on trying my hand in both areas. You have proven so otten that you see the future of amateur radio way ahead of the rest 0' us. It seems to me . • Numbe. old man? 00 you do any slIiing on all that snow? ' " 00 you guys in Sydney really use boomerangs to get you r dipoles up in the Irees?" Make it inter· esting! The kids are guaranteed 10 go nuls.but I believe only Barry remains.. . Tha n/o. I'm lucky enough to be within a one-hour's drive on crowded neeways to not just one or two. OST. I jus1 want 10 comment thaI the wire hanging down from the bottom 01 the walkie-Ialkie creates a variatiOn 01 the " counterpoise" antenna which may be a tong t c rqctten ant en na type . I've upgradedlo El<1ra (I love CWo anyway. Anybody who hasn't home-brewed al Ieasl one complete setup. I lived Quite a lew years under the pressares 01a rare OX.) Wha t can we do to generate interest among the youngsters. the average ham is looked upon as a weirdo by the rest 01 socie ty. I've changed amateur radiO (I good deal. Who wiN replace them . Just from NH! . There are always a million challenges! To sit in Ironl 01 one's sto re-bou ght tran sceiver for hours on end cannot be anybody 's idea 01a thrill . slaling proudly." Richard Ern sl fEA 7. " Rich. along with the names 01 countries no tonger in e xiste nce . Monacnock. since they 'd an be handlBd by computer.-area repeat~ .ing Ihe liff16 to write such a greattener. and get wider when they hear an A ussie or Slav respond 10 my call . and as 01 tOday I have yet 10 receive Ihe l irst reply. which chases the rare OX OJMllltor oN the bands. Imagine. and cieeee con tinue working for amateur radio's beuer l uture. February. you were running high power and an enormous collinear antenna part way up Mt. Melrose MA Wayne. I weighed 73. WillE . living in a townhOU56 in Los Angeles. for any reason. If I remember weN. good or bad. !tIen they' re hook ed. I still remember. Wayne Trevor M. He's probably the only thirG-grader in his school who actually knows where all the exec countries ara . and I built Ihe power supply l or that . I don't ignore the two transceiv ers installed therein. 1991 chase when the shipping costs are added in. This would increase par. A Novice ticket can't be more than a year awayprobably closer-lor him. we need more young blood in ama teur radio. and would eliminate the discouraging. I was wondering what impact my ta//O. Al1 lngstoll GfJOE. Rlvet"side CA I am rather slow al responding 10 the ar noe. l icipahon in the contests. Immediately after the war. they otten con tain repl ies. The general ham populatiOn would enjoy operating in a more qui et atmosphere ucoosphere ?). UK So Ole Ollie KA1 BIK is the other guy letl on the planet wilh radio dust inl ectiOn? I suggest we manulacture l he drug and peddle it in schools and instit utiOns 01 higher learning. inserting l he lube d elic at ely i nto t he wailing no stril . I wish more hams would do that! I'll be publishing il . presumably the bes1 operators in the world . realty b0oming. alter owni ng several homes on large lots back East. explaining to the visitor whal 's going on and how much fun it is . and World Radio in the balance. and alive a' all. and have also been reading the " Letters" 56Clion 01 73. I'm only 6. Sieve Kall WB2WIKl6. e xcept lor one Henry Radio RF deck using a 3CX12QOD7. our first 050 hap. push them .5W output to a little e-eemem yagia 25O-mile path over hilly terrain using terrible equipment on my end-was such a staggeri ng accomplishment that it turned me on to VHF(lJ HF lor lile. for IwO reasons : One... I don't see how any 01 them make it . • . Lowell E. With mildly incapaci lating cerebra l palsy. He's the only eight-year-old I know who can answer nearly all the " Wo rld Geography" questions on Jeopardy! He' s also getling a grasp 01 simple algebra. land OX people aboul the problems. Maybe one in live wilt ask som e questions about ham rldiO . which are lar more interest · ing than the same section in competing magazines. Some really are listening. I devour the technical issues and construction articlee. Every active ham who is a radio cl ub member should bring one nonham to the ned club meet ing . Actually I've been a Green Ian ever Since you were my first New Hampshire contact on 2 meter AM back in 1966 when I was a new Novice in New Jersey runn ing a Heath " Twoer. h was a bit easier than today. Now . color me crazy) and home-brewed oozens 01 slation s. concentrate the DXpedilions in those time Iflunes. Only t he kids can do that. unscrewing the liIIle plasliC cap. obtainable. Ihey never think about what goes on inside their equipment to make easy OSOS possible. are getting okler. eetter traveled than most because he was born in the Middle Eas1. anyw a y. Wayne . the lellers appear to be printed in l ull . lives with us . here is your so u rc e 01 ma il -order parts. but licen sing Ihe old-timers will not help the service survive. Th is ma y sound Cfitical 01 an otherwise wel l-wrilten article . You used to generate pileups among us " lowland teat-lockers" in NJ and PA. This could tllm out 10. Every lime I have a youngster in my car. lewer beam anten nas. or at least a $Imple transmitter. All my kW amplifiers are home-brewed. Table 42 on pages 35-38. I pick up the mike and make a lew coetecta." I sent 12letlers to companies on Ihis ARRL list. Canoga Park CA I've bee n lollowing your " Never Say Die" editorials for years. the negative ettects 01 the pu rSUIt ollhe ARAL DXCC as it happens today This pl'obIem bothered me also for a long time .1 on your Feedb&ek e. Thanks for ta/o. I enjoy the challenge of working DX using small antennas. but he can copy 5 wpm and get mosl 01 il down on paper . diSCUssed il w ith II lew close fr iends. and two . with formal introduct ions and the rolling out 01 a great. and--kepow! -back 10 the La nd 01 Glowing Bonles-searctling in the coal ecx lor gold strea ks 10 s1ido: in a crystal set_reeking basket coils for hell of it-soldering real. big welcome mal. I' d pay $100 for an inhaler packet with l he stuff. There are lots of easier ways to ma ke money. He's an avid fisherman. CO. " How's the weat her there in Belgrade. II ttle hobby _e heahhier. It still was e tten too much to take. In the December 73 " Random Out put" by David Cassidy.000 pur- 2 73 Amateur Radio Tooay . AHer 26 years I guess I haven't learned my 1esson yet. so maybe I ca n do some rTKNa..000 miles I rom my nearest dealer. yeah. we can get our own kids interested and licensed.. Their eyes open wide as they hear the foreign accents rolling in on my 10 meter rig. Over the past 25 years. and wn at's tak en t heir p lace s.I also enjoy the human side about clubs and individuals. Since everybody here in Calilornia is from someplace else (or so it seemeq. I said to mysell. who might be able to save ham radio? For starters. Every licensed amateur who is a school teacher at any level should lntrcdcce the wonders 01 wiretess communication 10 hiS or her stud enis. contest contacts would e liminate mos t o( lhe QSL problem!. New York City alone had a dozen . Used to be. t as k each new acqu aintance where they're Irom . d LETTERS From the Hamshack Lae l W1PL. and make the effort to introduce that person to the gang. andAA." To make a contact with NH uSing aboul 1. Even the world-class con testers . I know you're not jus1 trying to sell more magazines. Wayne Kant Phillips WB8HWO. in adul. Good news: I'm getting closer to gelting NH to set up my electronics education course. the DXeC croclems must be solved in some reasonable manner to keep it desirable. . ARRL OX. I had to get M e/o. and (may I say so?) snappier operators and more gentlemen. . I'm try ing. Dave recalls the magic 01wireless communications and how the newcomers to the hobOy might miss out on the l eeling. Many are soci ally inep t. his coordination is not great.s for your nice tetter. .000 hams a year. Laci. and try 10 show them one OSL card f rom thai p lace . due to the lower power s. with bright colors and bold descriptions 01 the OX locations) to p-eencally every single vencr to our hom e. Make an issue 01 it. pened 43 yea rs ago! Hi' . I agree. when I was praclically the only HA statiOn on t he air. " Being an avid home-brewer 01 just about everything . 25 years ago. sometimes includi ng complete receivers (whal a job') and otlen 01 my own design . and being post· ed overseas. My eight-year-otd nephew. and keepon pushing unt~ all the Mighborhood kids have their tickets. It's sad that most new hams ere such appliance oper ators. paid for entirely by adve rt ising revenu es . or going tnu-tcpping to work VHF OX. but the term "eoernerpoise" has a more prolessionaf ring than " rad radiator. I know it is very d ifficult to change anythi ng. severely inlroverted (e ~cept on the air).. " Oh. momenl." They are absoluteIydumblounded. 10 sel new standards? Who is going to be the nrst to make 300 OSOslhour in a ceotest? Work DXec in 60 minutes ? 0&velop systems 10 make peceet meteor scatter contacts a daily occurrence? Keep push ing lor less restrict rve legislatiOn regard ing antenna and lower lOnmg and ordi nances? Design the new amateur equipment? Distribute and sell it? T here' s lar rewer ha m stores i n America than ever i n m y pe rson al tenure. Then. I show my limited OX OSL ca rd cotecucn (abouI 100 countries ere hang· ing on the wall-the most interesting card s I could pick out Irom my ccuections . so I didn 't hang arO/Jnd 10 see whether they would arrange a monument or tar and feathers. as you mentiOned . Big deal ! They probably save $35 on a $1. mysell . alienating ettect 01 so many pileups with all the annoyances.. One only needs to l ake a bit 01 time to l ind the right bullon 10 push. Even the rare OX statiOns would be free of Ihat aggre ssive calling-hyslerla. And thanks for being my first 2 meter OX con tact. Sighl There's no cure .. . It was great to meet you and even more so to hear you talking 10 the New Eng. and 39 contains the " ARRL Parts Sup p ly List. and without your relreshing comments lile would be rather dull. I know Ihis guy sam hom there." Please enter meet Ha m-It-Up Sweepsta kes . I compel anyone interested in the l ul ure 01 amateur radiO 10 IoolI lor those buttons. Some are bona fide sociopaths! (Just listen in on a coupl e 01 the wiCle-COvefage LA. 73has the best mi~ of the things I want to see. One a dded benefit. sotid copper wire seductively wrapped in colton-drilling ebon y wood front panels-I But I speak a foreign lang uage to young and middleaged hams. 73 COUld be free. Caveat 11 . Keep up the battle. The re are as many wa ys to ge l youngsters interested in radio as lhete are youngsters. il valid DXeC cred its would be given for OSOs worked only during the world's main contests. This may e~ isl only in Los Angeles . might have on the DXCC brethren. honest·loGod . but five ama teur radio outlets. doesn't know what he's missing. Robertson K6QXQ . " Rad Radiator: ' in the May 1990 issue 01 73. but il cou ld be dona . New YOI1l NY Wanted you to know 73 has f0llowed me everywhere in the Middle East. based on his interesl in Ohm's Law. asking questiOns aboul how to gel licensed. I believe on your end. which won't be taught in his schoot lor anoth · er IwO years. We have a great hobby lor retirees . Keep up the saure only worthy 01 " UnCle Wayne. you k_ ee Dav id Terrell KB5LAMIAA Thank s lor producing a high·quality producl .mayb e even conv ince t he board to make ham radio an accredited class. It does seem t hat most 01 my CW contac ts are with relired lolks who leamed the code belore or during 'NWII. and pulls the big trout out 01 lake Whatehamacanit. no pari ty. Forest Road..00 surface and $37 . _. 58 Above a nd Beyond 72 Ad Index 66 Ask ~boom 76 ATV 70 Bart er ' n' Buy 27 Ci rcui1s 79 Dea lM Dlreeloty 61 OX Feed~k 17 Inde x 46 Ham s w ith eta. 60 3-525-4201 inc lude lheir social securily number wil h submi lled manu scripts. We'd like you lO rate .th dra".FEBRUARY 1991 Issue #365 THETEAM Amateur Radio Today PUBUSMERIEOlTOR Wayne GreeI\ W2NSOt'l AS~ATEPU8USHEA David Cas&l1y N1GPH MANAGING EDITOR 8ill Brown WBBELK TABLE OF CONTENTS PRODUCTION EDITOR Hope Currier SENIOR EDITOR Linda Reneau KA1U KM ASSOCIATE EDITOR Jo ~ $awtelle CONSULTINGEDITOR M. . Reprints: The firs! copy of an article $3.. Circul.. wek:ome and . Hancoct. ManulJCl'!pl. Conlnbutions in !he Iorm 01 manuscnpts . FAX (603) 525-4423 SUbtcrlpllon Sefvices t-eooees-casa Color~ Foreig n Subscrlbetl call1-303-447-9330 Wayne Green ElMerpOses is adMsion d Advertieing Olliee.00 airmail per yea r. .. " .. ! How? JUSllake B<lvanlage of our FEEDBACK card'lI1 page -- Anguilla DX vaca tion .pl\a ...nenllor lhe use ol. Photo by Steve J .. All contribution s shoould be directed 10 the T3ed ilorial offices.eproduced wilhout writlen permission from lhe pubjish8l'. PO Box 58866. lwOyeara $39 . . Bouldef. $ 19. WOE Camer Hancock NH 034<19 ph c ne : 603-525-4201 ConII'KI: See wtlere natural ham CUrIOSIty gels you? Upon hnoshing reading !he fifSl sen lence. it should be a cinch 10 make this clear to ewry dealer and manU'aC!urer you contacl to exhorl them to advertise wil h us. you have formally conlfaeted . Inc:. The subscriplion ra le il: one year $24 . WABSAJ meters... __ KT2B 57 An Inexpensive 10 GHz Dish System The plumber's delight! · WT0W 28 The Kenwood TH-27A A mini HT w ith maxi features.n 5 or MCI Mail " WGEPU S" or GEnie acc-ess " MAG73" ) Of ond isk as 8I'llBM-<:ompalible ASCll lile.000-289-0388. . POsllnast8l': send address changes to 13 Ama. __ ... US Citizens must 73 A m atellT Rlldio TodlIy (tSSN 1052-2522) is pUblished monthly by WGE Publishing... New Ham pshi.more greatllome-btaw 'or you ! 73Amateur Radio toaev » February. All forfllgn orders must be ac:companied by payment it US funds . . WOE Canl_ Hancocl< NH 03449 phone . 80 Hamsat. 75 _.. one stop bit... 1991 3 . CHIEF Fl NANCIALOFFJCE:R Til'll PeIlcey CIRCULA TlON COORDiHATOR Harvey Chandler CIRCULATION ASSISTANT Jane1 laFounI8'08 To $ubsctlbe: 1-800-289-0388 Editorial Offices Ed ito rl.. 86 Uncle Wayne'..(lOand for other foreign countries. 800-225-5083 Inl&rT\atlOl'lal Data Group. "How 10 Wrile lor 73" gu idel ines are ayailable upon req uest. Pa.. For Subscription Services wrile 13 AfN lf/UI' Radio . 34. see p..i. Mon !" · VP2EJW. Please eoecse a stamped .tion Office.mHarper LouiSe O'Sullivan ACCOUNTSERVICES Donna DIRusso 1-603-525-C201 1-800-225-5083 FAX (603) 525-4423 ~00lIC1'J()N MANAGER WoIIamH8) doIph PROOUCTlOH COORDINATOA Vi ki Van Valen ART OIRECTOfl Alice Scofield TYPESETTINGlPAGINA TION Linda Drew Ruth 8er'HKIicI Slave Jews" GRAPHIC SERVICES Dale Williams Theresa VeMIle GRAPHICS Pt+OTOGRAPHEA Dan Groleau WGe PUBLISHING INC..a be coosodered for possible publicalion. Mocrolilm Ed~ion-University Microfilm. No pan of Ihis publication may be .ngs aodIor phologra..e 03449. WA6EJO · 20 UHF Source Dipper The easy wa y 10 tune ci rcuits from 400-500 MHz! WB0ESV · 24 UHF Field Strength Meter For 400 to 500 MHz .. And then '"'" will dn . NH03449.. . one Feedback card ach nKJllIh for a free oubocripl ioa '" 73.eur Radio .. Hancock NH 03449 603-525-4201. You can also con lacl usat lhe 73 BBS at (603) 525-4 438 .. HEO 48 Pour an Antenna for X-Band 20-20 vision for your microwave system! . self-addressed envelope Wlth each submission... Second class postage paid at Hancock. type.(7·93JO . c heap. Add'tiorlill poslage Jof Canada i$ $7. FEATURES REVIEWS 10 Radar Detector to Microwave Receiver Conversion Listen on 10 GHz. . Foresl Road.97....SOl· Wnte 10 73 Amateur RadiO Magazine..1148106. A premium will be paid lor aceepled articles lhal haye been submitted electronically (CompuServe ppn 703 l O. . Nolf WA6EJO. or calf 1.1GP Bob Winn W5KNE ADVERTISING SALES REPRESENTAliVES D. " WA4WDL 52 The Microwave Directory Where to find a w ide range of goodies for operation at 902 MHz and above. Hancock. Ann Arbor.. Recogn... . WGE Center. Boulder... Cover: The radar e1etecfor 10 GHz r«:ewer.th 13AfNleur Radio Today to be our grass-roots ad sa~ person.. WGE Center Forest Aoed. N1GPH DEPARTMENTS 40 SHF Systems Linear Transverters for 1240 and 2304 MHz Explore the m icrowave bands w ith these easy-to-build kits. 56 Hom Ing In 2 Le tl ers 68 Look ing W est 4 Never Say Ole 64 New Products 88 Propaga tion 62 QRP 7 QRX 88 Ran Oon! 0u1pu1 67 RTT Y Loop 73 lntemallorqll M Special Event. AudIt Bu. . 300 or 1200 baud.. __ .>ffice. Inc.. · W B0ESV 32 Future Modulation Amateur Television Sometimes cailed frequency modulation W9NTP 34 Take a West Indies DXpedition? " No Problem . CO 80322-a66 .ke Nug&nt WB8GlO CONTRIBIJTlNG EDITORS M'k' Bryce WBaVGE Oavicl Cowhig WAI tSI' MocIIIel GeiII' 1(81UM JimGrayW1X\J17 Chucic Houghton WB6lGP Arnie JoIwIson N1BAC 01'. . . New Hamp&hire and al add ~ional mailing ollices.97. CO 80322-3866.ny unsoliciled mal8l'ial will be made upon publication. So where does ham curiosily lead lo?. !here-righl here in our . __ . You'1Il1U1ice a feodhack number al l!>< bt...zing that we gIve you more ham 'un lor lhe buck lhan the '&SI. I Office. KT2B 54 The Commander II Amplifier For more fun on 2 . t7 . In CO calI 1-3()3-4. WGE Center...... Ca~ian second class mail registralion number 9566 . StOfY on page 10. Enlire conlen ls © 1990 by WGE Pubjishing. . We can /l$SUme no responsibility lor Iosa or damage to any mal8l'ial . 1..t you resd oolhal ~ tan prilll ... . 8data bits. ... PO Box 58866. . wc e ce-eHancock NH 03449 phone .00 (each additional copy-$l..inning of uch article and column. . Malt LNveyWA3AJA Andy MacAlisler WA5ZIB Joe MoeII KIOV Jim Monissen K6MH Bill Pasllm1ak WA61TF Carole Palry WB2t. Remember: Mor e ad pages ~ more an icles. th. 01 yoo lile besl . 59 Updat es --• FEEDBACK ••• FEEDBACK! II' s li kebein.eau 01 Circulations (A BC) membership applied tor.. _... .. . anyone who says this is controversial is ignoring incontrovertible facts. as long as you have those in fernallhermoslats turning the DC on and 0' oil all night. you're hi tting your whole body with squa re waves. I'm keepin9 my linear amplifi er tar enOU9 h away trom my operating pos ition so I' m not going 10 be milligaussed and square-waved . I suspect that ' requency·shift keying may be far more benign. As the demand goes into panic mode. I know you 're hoping I'll d igress WIth more irreleval"lCies . all as part of a cooperati ng group.• Number 2 on your F~bac k cud throogh a pile of heavy duty research journal reports. and the edvertrser has Ihrown away around $2OO. Well. has been al it again. it may well be dam agin9 our minds and bodies and sending us to an early grave. aren 't dying lar faster than our actuarial tables prediCt.OOOa year in sales. canceled all his ads in 73 in retaliation . Ross POinted out in his tal k how the League "ally relused to cooperate with research aiming at gen. so families and friends woutd come to acceptthem. C0ngress will go alon9 wtIh the money. Wo men who use electric blankets are having a greatly increased incidence miscarriages and malformed children.larre they are. 4 Hz . I can understand why the League has a ves ted in tere-st in trying to cover this up This is the same roote taken by the tobacco industry wh en it was suggested that cigarenes might be harmful . I agree. Square waves. Tumors. ers .. We can interfere with this process with drU9S and interfering magnetic helds. Part of this is chemical. July 30th.. I'll put the bibliOgraphy on the 73 BBS. I recently watched a video tape 01 his address . Miscarriages... worshIpped Morse eooe could welt be killing us . Ham dealers joke about hams being crazy _ Do we become hams because we 're crazy or vice ver'$8? No. _. page 53. As Ross pointed 001. First. When the dollars involved are big enough . Ou r systems do a heroic job of repairing damage done by carcir'1098nic materials we eat and breathe. The duplication process involves t he magn etic transfer of infor mation as DNA molecules copy and spli t. one who will force the league 10 cooperate WIth researchers in studying such matters. that the po werful square wave EM field our transmitter generates when we se nd Mo rse code does affec t the of our bodies and brains to some degree. 73 0' . This stuff is insidious. NEVER SA Y DIE Wayne Green W2NSDll Scrambled Brains Some yellrs lIgo in one 01 my usual teeble attempts at humor I suggested that since we seemed 10 have far more bad operaling problems with our ExIra creee hams thlln with others. From wIl at I've l ead so far it seems very likely that further rl">8arch could show thai CW cps running a couple hundred wan s are gelling a carcocgenic blast of EM wIlich is equivalen1to smoking a pack or two 01 Cigarettes a day.nd that ded . maybe the Morse code had scrambled their brains. One advertiser. The perso nality changes which the code may be making in us would OCCUI slowly. ri ght? Oh yea h? W hen you' re receiving Mo rse at20 per. Bad news. over a periOd 01 years .. CurrenfS Of Dea/h.. Deformed children . too . Yoo can build or blJy a milligaussmeter pretty reason abiy. AARL stalwarts who bothered to atte nd the 1989 league convention had me opportunity to hear Dr. ttrat's at about 6. no maner how many people get k~led ..4 Hz set square waves.. An Opportunity As the media begins to understand the extenl of the damage being done to people by electromagnetic radiatiOn. like cigarenes. if you'd like 10 check it oet. bu t the body only has so much ability for self-repair and when eventually we exceed that the cells go beeserx. we can see where we mi9ht be in trouble wnen we're transmining. Ross Adey K6UI glV8 a remarkable talk on the subject. someth ing every ham club should put on tl'leir program. They were fur· ther steamed when they were refused COnIlnu<Jd on p-". . i1 may be changi"9 your Pl""SOIlabty (not likely for the bener) and shortening your li'e.cks up trom where he left Off the year before. Children with damaged genes which may IlOI kick in until years later. Go back through my 40 years of edItorials and show me whe re I have ever been wrong on a scientific matter. Our beloved. over a period of years.cJriIing in thIS 118Id . My tape came from WA6PMX. The code not only has linle place in modern rediO communiceuone. Ihe chap who wrote a three part series in the sam e mag a. It you th in k old Uncle W ayne is pulling your leg. I'm going 10 gel back to the subject at head. Our Cell s If you do some homework you'll find thaI 001 cells wor k on a combination of eleClrical an d ch em ic al re actio ns . ceus Even More Bad News Okay. Yoo may be sure that I'm going to keep HTs with subaudible tone generators ta r away from my body. part electric al. but you know I'm not going to ask for a second opinion. we'll go through the usual shortage/glut roller coaster ride.ng this informal~ This opens up some very serious questions for us. But can we really expect this repair system to be able to cope 100% wi th powerful and e xtended daily blasts 01 EM energy whIch screw up cell growth and communicatiOns in our brains and every part 01 our bodIes? rn be SlJrprlsed il we don't f.. They we re mad because their AAA l booth fo r setlin9 OST subsc riptions and l eague books wasn't allowed 'tee into the paid vendor area. partlcularty those running some power . cetec CW operators . The human statistics back up scientific experiments w ith mice and Chicks. Nope.. bul no. likeltleydon 'lIel us drink alcohol and they don't let us smoke. there is a need for you to make sere that you eIecI a r'I8W director. . Wives som ehow manage 10 get used 10 DXers puning a new country before the marriage. Ftaplet It you don't read the AR AL HQ BBS you missed a great item tell ing how angry a couple AARL ceetere we re at the recent Housto n Ham Com. I do my homework before I write. It turns 001 that not only do incredIbly weak EM forces have very measurable effects on cell growth and communications . that means you readers have been 001 about five good constructIOn profed s a yea r thaI these ads would have made i1 posSIble for us to publish. check out Time .. This should open an opportunity for entrepreneurs to offer degaussing services. We 'll know more about those effects as the Genome Project progresses. another feather in the cap 01 amateur radio . Paul Brodeur. but at least we can receive code without wo rr yin g . no metter how misplaced. I don't think I am. . I know this. You 're blasting your brain with a 6. not alt hams are crazy. Okay. They communicate electrically.. even when i1 means wad ing 0' The Bottom LIne So it looks as nSam Morse didn't do us any favo rs. We 've isolated several of the o pera\in9 frequencies 01 the brain and they're all in the low Hl range Is it really jus t a coincidence that such a heavy proportion of the trOUbles we've been having in amateur radio $99m to be with Extra Class operators? 4 73AmateurRadio Today . But I can understand an urge to dismiss bad new5_ There muSl be some miSlake. who do not subscribe to The New Yorker magaline . Loo k for his book. That industry sti ll isn't convinced . children or even makIng a living. with a sense of humor clown in the molecular range. no matter how bi. Our government wouldn' t let us use electriC blankets if they _e dangerous. but slowly. Is i1 mainly Extras and tl'leir 2Q wpm code? How much 01 an effect can 13 per have? Maybe we can accept amateur radio only partialty addling o ur bl eins . I feel tre mendousty lucky that I changed to frequency-shift keying 40 yea rs ago. My firs t solutiOn to this was to suggest rec tifying the current and making il DC. do me a lavor. I'M be surprised if they don'l jump on this gloom and doom bandwagon and scare the public silly. I' m goi ng to steer well clear of Morse.. for lhose few leaders who are borderline illitelate . I have to admire such strong convictiOns . February. right? Sure. and the hi9 h incide nce of tumors among power company wor k. We see a similar higher than nor· mal incidence 01 cancers with hams. and part is magnetic. . There's a strong link to cancer. The latesl Brodeur New Yorlcer al1iee p... entrepreneurs should be able to set up some very pro fitable businesses.z: ine last year ebout the effec ts of weak elec tromagnetic (E M) for ces on cells. But let's suppose that the Obvious is ac tually t ru e . Brodeur re ported o n the incredib le incidence of brain tumors across the street ' ro m a po wer substation in con necticut . both rece ivin9 and transmitti ng. F've some news. Ross is one of the leadll!Q scsenusts . It won 'l k~1 you in a day or a week. II you think Wayne is fuN of baloney on this one. They are busy working and duplicating themselves. Ross has published some Irightlul charts in SCienllfic journats showin9 what a 450 MHl HT wilh a 16 Hz tone can do to "".1 991 0' Is it entirely a coincidence that almost none cune Bash-licensed Extres ere in trouble? We know that a high percentage of the Bashers never had to bother learning the code . this is exacerbated when there are switching transients involved . With a meter and some understand ing EM. Cancer. using low Hz frequencies. in other words . The Automatic Lock Tuning (AlT) on 1200 MHz eliminates frequency drift. all mode squelch. BOX 1075. mode. feafures and priCeHlre 5uDject to ch.TSU-5 Programmable CTCSS decoder . VFO or quick step channel tuning.ace manual5 are ava"aDIe lor al! Kenwood lIan5ceiver5 and most accessories Specificarlons. • Dual Watch allows reception of two bands at the same time.Canada L4T 4C2 . LSB. tone information. Optional Accessories : • PS-31 Power supply .500 Hz CW filter built-ln. and 10 watt. with frequency stability of ±3 ppm.O. • Operates on 13. automatic repeater offset selection for FM repeater use.Ontario.~Th. • Direct keyboard frequency entry.A. output Is 45 watts on 144 MHz. • 59 multi-function memory channels.lnge wi r/lour nonce or obligarion p. Store frequency. offset. automatic mode selection. dual muting.lF shift. direct keyboard frequency entry. BOX 22745.Aut o m at ic Lock Tuning -on t200 MHz eliminates drlftl .. PG-2S Extra DC cable KENWOOD KENWOOD U. • Packet radio connector.IF· 23 2 C Computer interface . Perfect for mountain-top Dxoentons t • The mode switches confirm USB. 959 Gana Court Mrsstssauqa. noise blanker. speech processor. UT-10 1200 MHz module . Other features include dual receive.CA 90801-5745 KENWOOD ELE CTRO NICS CANADA INC. multiple scanning and multiple scan stop modes. CW. 2201 E.5 enables sub-tone decode.) • High stability VFO. Powe. selectable AGC.Ten m em ory channels for "odd splif • CTCSS encoder builHn. • Automatic mode and automatic repeater offset selection.o.8 VDC. • Memory scroll function. and quick step function. on 1200 MHz. The dual digital VFOs feature rock-stable TCXO (temperature com pensated crystal oscillator) circuitry. • Interference reduction controls : 10 dB RF attenuator on zm.TS-790A Satellite Transceiver The new Kenwood TS-790A VHFIUHF all- mode tn-band transceiver Is designed for the VHF/UHF and satellite " power us. (The 1200 MHz section Is an optional module. 40 watts on 450 MHz. new TS-790A Is an all-mode 144/450/1200 MHz transceiver with many speci al enhancements such as automatic uplink/downlink tracking. Mc-eOA /MC. CO RPORATION CO M MUNIC ATIONS & TEST EQU IPMENT GROUP P.aOI MC-85 Desk trues • HS-S/HS-a Headphones _ MC-43S Halld mic . • Other useful controls : RF power output control. SP-31 External speaker . 59 memory channels (10 channels for eeperete receive and transmit frequency . or FM selection with Morse Code. Mem ory ch annel lock-out is also provided . Dominguez Street Long Beach. RII • Voice synthesizer option. frequency lock switch. Optional TSU. This feature ancws you to check memory contents without changing the VFO frequency • Multiple scanning functions. • ALT. • Computer control option. Complele se.torage).s. YS· 2 Voice synt hesizer unit . • Frequency step selectable for quick QSY. or 25 kHz steps. and economy power mode extends battery life. SDecricalJOl"l$ and Ie<IllNeS are sub/eC1 kl cnanpe wnnovr ooece f¥ OblIgallOll ~ setVlCe m. allowing repeater control codes to be stored! . these pocketsized twins give you full-size performance. • Large capacity Nled battery pack supplied.TX on Amateur bands only. canada L4T 4C2 KENWOOD .. 20.2 m and 70 em Super CompaetHTs Here Is a great new addition to Kenwood's HT family . Specifications guaranteed for Amateur bands only. (TH-47A: 1. CTCSS.) • Multi-function scanning. as well as other Kenwood series transceivers. the batteries are being charged. 2 . • Automatic offset selection (TH-27A).995 MHz. • T-Alert for quiet monitoring. dust caps. • Dual Tone Squelch System (DTSS). with time operated or ca rrier operated scan stop. • Auto battery saver.anuaJS are avaJlaOle lot MI KenwOOd /folflSCeM. The DTM F memory function can be used as an auto-dialer. PB-14: 12 V. (TH-27A modifiable for MARS/CAP. 959 Gana Court Mississauga. auto power off function.8 volts. • DTMF memory.es. providing extended transmit time with 2. (PB-13 only. CORPORATION CO MMUNICATIONS & TEST EQUIPMENT GROUP co. TH-27Ao118-165 MHz. 2201E.'(S and most accessor. When external power is used. CA 90801-5745 KENWOOD ELECTRONICS CANADA INC . 700 m Ah N iCd pack . frequency. BOX 1075.5 W) • Extended receive coverage. The rotary dial ca n also be used to select memory. 14 • BC-le: Wall charge r for PB-14 . • Bullt·ln digital clock with programmable timer. battery pack. 15.2 V.pacesetter in Amateur RadiO .5 watts. Band and memory ch annels can be scanned. All characters from the 16-key pad can be stored. and scan direction. Permits required.2 volts. SU C-3 2: Compact speaker mic · SMC-33: Compact speaker mic with controls • WR-2: Water resistant bag.16 volts).41 memories. P. KENWOOD U. 700 mAh. this selective calling system ---uses standard DTMF to open squelch. PG-3F: DC cable with filter and cigarette lighter plug • PG-2W: DC cable .the all new TH-27A for 2 meters andTH-47A for 70 cm l Super compact and beautifully designed.5. wall charger. • Five watts output when operated with PB-14 battery pack or 13. 12. SCo3l: Soft case • SMC-31:Standard speaker mk: . BH-8: Swivel m ount • BT·8: Six ceu AA Alkaline battery case • HMCo2 : Headset wit h VOX and PIT • PB-13: 7. Tone Alert beeps when squelch is opened. wrist strap. All channels store receive and transmit separately for "odd split" • DC direct in operation. • crcss encode/decode built-ln.A. Compatible with the TH-26AT Series and the TM-941A Triple bander. 10.O. Choose from 5. • Direct keyboard frequency entry.) Optional accessories: • BC·14 : W all charge r for PB-13 . frequ ency step. Allows external DC to be used (7. TH-47Ao 438·449. • Supplied accessories: Rubber flex antenna. . BC-15: Rapid c harger for PB-13. BOX 22745. Dominguez Street Long Beach. 300 m Ah NiCd pack .S.Ontario. belt hook. The standard battery pack is 7. Passage of this docket exempts handicapped persons from the high-speed code exams if their physical condition makes it impossible for them to learn code at the required speeds. Fax: 203665-7531 . " Mo st [communication) is by voice. However. Responding to the Federal Communications Commission action PR Docket 90-55. was approved by FCC Bureau Chief Haller and Commissioners Cross.Number 3 on your Feedback card RX. Dockel 90-356 The above FCC commissioners also passed Docket 90-356. in fact rob them of the pride that they might otherwise have in being able to meet tough standards . II will still be up to the amateur community to police its own ranks. Applicants for the new Technician license will have to take the theory exams. tel: 203-666-1541. Washington correspondent. Price noted that the ARRL Board is holding its regular meeting January 18-19. and Paul Courson WA3VJB . Originally . Usually it takes the FCC from several days to several weeks after a Commission action to release an item aller editorial review. will promote further growth of amateur radio. Washington correspondent. nothing changes.. For further Information contact: David Sumner K1ZZ .. " The timing looks good for a careful review of the Commission's action at that meeting. . Dr. For existing Technician class license holders. Price observed that the FCC formula is likely to be less acceptable to many amateurs than the League's. Docket 90-55 establishes a codeless license by eliminating the code requirement for the Technician class license. via MClmaiJonDec.S. " But the hundreds of comments the FCC received from people and groups "removed that concern. . The Novice class is also unaffected by this change. Most experts feel that full implementation could take place as early as February 1. It was carefully balanced to offer attractive privileges while protecting existing patterns of amateur activity. Price said. He asked that League members share their views with their elected directors. TNX Bill Pasternak for sending us this Amateur Radio News Release from the American Radio Relay League. was based on ex· tensfve membership input. era! needs of handicapped people. . 1991 . • • EDITED BY LINDA RENEAU KA tuKM No Code At Last! On December 13. noted with pleasure that the Commission had decided to retain the Novice license as a means of entry into amateur radio and to adopt a codeless license with a meaningful written examination requirement. we would of the Amateur Radio Service without them . 19. During the presentation . a total of 55 questions. "Morse code does not prove what kind of operator you are going to be.S." said Mr. TNX Bill Pasternak WA61TF of Westradio and Amateur Radio News/ine. There is a license that can be lost for . He noted that today. In the end. the FCC had proposed the phasing out of both the Novice and Technician classes .1990 the first no-code amateur radio operator'S license in the U. . At FCC conventions.lnc." he said. which the FCC failed to provide. and help recruit technically inclined people into the Amateur Radio Service . He said that because of amateur radio operators volunteering their time and personal funds. 1991 7 . and Sykes. claiming widespread cheating in Novice testing and a general need to save money. including 10 meter radiotelephone. the president 01 the American Radio Relay League . The new Technician will be granted all privileges on aU frequency bands currently allowed 10 Technician class license holders. violation of the rules . There is a 30-day window of opportunity following release in which petitions for reconsideration can be filed . we 'll have to see the Report and Order. anyway. The AAAL applauds retention of the Novice license and seeks input on privileges for codeless technicians. but not participate in HF operation unless HF privileges are gained by passing the 5 wpm Morse code test through the VEC system. and dropping the CW requirement for the Technician class license. at no cost. Many of us hope that this will increase the growth of amateur radio without decreasing the quality. This is the first no-code license in the history of the U. " The formula developed by the ARRL Board of Directors. "Our members were very strong on both of these points. TNX Bill Pasternak WA6/TF of Westradio and Amateur Radio Newsline." Chairman Sykes said that "The steps we took to broaden [the Amateur Radio Service] . February. creating a codeless class of amateur radio license. the media demanded proof 01 the cheating claim. Amateur Radio Service. Says Bureau Chief Haller. It only proves that you can send and receive Morse code! We [the FCC] are retaining a written test.. under the VEC system . ... and Paul Courson WA3VJB. which called for privileges above 220 MHz . Commissioner William Cross says that the FCC " will rely on a physician's certification of disability to determine eligibility of an applicant . "There was some fear in my mind [at first)." While it will take some time to gauge the reaction to the Commission action." Commissioner Quello stated his personal feeling that it was definitely time to open the gates of amateur radio to those who may not be able 10 master the Morse code. the FCC opted to follow the suggestions of the Quarter Century Wireless Association (OCWA). required lor both the Novice and Technician class licenses. along with establishing the new codeless Technician license. and that in trying [to bel compassionate and responsive to the spe- The new Technician will be able to experiment with exotic modes. and several VECs offered to bring Novice testing . Technicians licensed before the implementation of the new codeless license will be grandfathered to protect their earned HF operating privileges." Comm issioner Irvil Duggen said . The AAAL said the abolition of both classes was unacceptable. own repeaters and remote base stations." Private Radio Bureau Chief Ralph Haller W4RH said that relaxing code requirements for the handicapped ." All five FCC commissioners agreed that passing Docket 9(). Chief Haller held up a 2 meter HT and declared it a symbol of the vital role amateur radio plays . who collectively determine League policy. the CW waiver for certain handicapped individuals. but only for operation above 30 MHz (6 meters and above) .. individuals and groups presented the FCC with information that refuted their budget-saving argument. Duggen. Mr." All five commissioners voted unanimously on both agenda items: Approving CW waivers for handicapped hams who want to upgrade. holds the potential to provide an even more vital and dynamic service.. . 1990. ceene. Also . They retained both license classes and modified the requirements for a Technician class license to create a code-free entry into amateur radio. The ARRL's Response Subject: A RRL No -Cod e Reconsideration. Price. There will not be any call-letter distinctions between the old and the new Technicians.55 will keep the nation at the forefront of communications research and development. President Price sounded a note of caution with regard to the privileges the Commission plans to grant to the codeless licensees.. that we might be leaning over too far backwards in relaxing our standards. " Before we can decide whether to request that the Commission partially reconsider its action ." Mr.. because they couldn 't imagine how we could maintain the character 73Amateur Radio Today . Larry Price W4RA . it is possible to communicate essentially around the world with a small radio like this! It gives you an idea of the dedication 01 these amateurs to the advancement of the radio art . 1221 5. In the gulf an d nearby wate rs.Secondary: 4704. Please include the dateftime ot the reception. OK. A number of scheduled voice contacts were made as well during the evening pass es over the U. Hillside. 5658. 16587. It would help to send an additional copy directly on packet to SAREX @ W3IWI. 6750. 6204. Hancock NH 03449. The U. Turkey: 3137. at the Watchung Reservation in Mountainside. • • Persian Gull Bands Nearly 400. Newington CT 06111. fL: 4746. 8 73 Amateur Radio Today . So uth America. We'll send you everything you need. using the callsign " Hotel 1". 225 Main 51. one stop bit. TNX •. -I ncirlik. MCI Mail " WGEPUB" and the 73 BBS at (603) 525-4438 (300-2400 bps). 13244.6810. 8294. 6519. 14 13.USA. The staff of 73 tries to get to as many hamtests as we can . Quite a few voice contacts were made. and Ed Bro wn KB 1MZ in particular. and 23315. 13214. and WA2BAT (not in photo) set up a temporary outdoor radio station using a Kenwood TS-430S and long-wire Windom antenna. 1801 9. Middle East air traffic controlle rs for the Gulf Region operate on: 2992.NA (or via inter net mail to: sarex @t omcat . 6218. 1331 2. 12492. 11176. 11176. . The robot packet experiment was a success with 238 stations worldwid e completing two-way packet contacts. Forest Ad.S. 11246 .1 3244.1 3214. That's where you come in. Springfield Emergency Management Staff KB2KOO. A QSO with a Kuwaiti amateur could cost him his life.. Boy Scouts from Troop 73. This information will help determine all of the stations who made one-way connects up to the shuttle. The Saudi Air Force can be heard on 3095. TNX AMSA T and WBBELK.MD. SAHEX Success! Over 500 hams were able to communicate with Ron Parise WA4SIA during the recent STS -35 space shuttl e mi ssi on. 8967. 8291. 16593. And remember.S. TNX Nashua Area Radio Club Bulletin. last OCtober. Army Corps of Engi neers in Saudi Arabia are on 9130 and 11 425 . .n 5. New Jersey. 6738. New Jersey. It's easy. Above. primarily in Australia. 22105. A complete wrap-up of the ST5-35 mission along with news of the upcoming ST5-37 mission will appear in the March issue ot 73. •• to all our contributors. 13214. WA2QNZ. hard cash! Up tront. . ME: 3074. 13257. 11179. KB2KEC. Riyadh "Hotet 2" is on 7300 and 12112. 12435. Springfield. you' ll get the personal satisfaction at sharing 73 with your local ham friends. and 8990. the U. 5690 . '1 288. participated in the33rdannual Jamboree On the Air. 1001 8. 1991 . 15015. 8918. 8993. 11 300 is another active freq uency in the area .S. troops in the Persian Gulf m eans Increased military communications on the HF bands. or by mail at 73 Magazine. At an average hamtest. That's cold. 11176 .gov).000 U. 8993. Navy has been heard challenging commercial vessels. 22124. KB2KEC. but there are plenty we miss.S . The United Nations forces are assigned the following sets of frequencies: -Primary: 6632. no parity. 11233. 22127. 22130. Not bad for a few hours' work-plus. 5667. gsfc.S. 5526. Dharan Air Base has been heard on 9130 and 11100. 44 19. 8964. 6750. and South Africa . 13231 . USB: . at least make a few bucks for yourself or your club. 9006. Several hundred more were at least heard by the shuttle. A QS l will be issued to those who send in any received packets trom the shuttle (QRZ logs). Twenty-eight school groups in the U. don't CO Kuwait. You staff the booth and take subscription ord ers.nasa. You can reach us by phone at (603) 525-4201 . 16590. when thousands of hams opened their stations to scouts.crovcon . orJOTA. From the staff. had a chance to talk with Ron . while he was over Australia and Brazil. . 5603. 23227. 15015. Also check out their HICOMM channels on 7525. 3404. using callsigns " Castle 1" through "Castle 8". and 22136 .February. We'll pay you (or your clUb) to run a 73 booth tor us. and bye-m a il o n Co m p u S e r v e ppn 70310. forget about personal satisfactian-do it tor the dough! Ju st call Donna DiRusso at (603) 5254201. Please send your receive bulter tiles to the ARAl. via a telephone bridge to the uplink sites. Get Hich-beyond your wildest dreams! Or. 5703. 13288 . and we'll give you a cut for every order you take. Attention: Rosalie White. 6738.• . -Mac DiII AFB. 6905. you should make a couple of hundred. 8847. 13336. Here are some USAF Globa l Command and Con t rol System (GeeS) frequencies in kHz . WA2WUX. The most act ive chan nels have been 4 125. 9011 . UK: 3067. and Troop 94. 8 data bits. 6521 .Asceneion Island: 6750.Loring AFB .RX. You can operate anyWhere in a band and get low SWR. Efficient airwoeno inductor.MFJ's Artificial RF Ground 579 05 MfJ. 41hx21J2 X3 inches. Covers 1. Great tor apartment.0 ..8-30 MHz. the MFJ962C rets you use your barefoot rig now and have the capacity to add a 1. Good for matching solid sta te rigs to sneers.95.. 1000 volt capacitors. stronger signal..8-30 MHz. After all. SWRIWattrneter. You'll get maximum power out 01 your solid state or tube rig and ii'll run cooler and last longer.00 slh. balanced and coax lines from 1. random wires. dummy load. This gives you the precise con trol you need to get your SWR down to a minimum . 1441220 MHz VHF Tuners b ·. They handle 300 walls PEP and match a wide range 01 impedances for coax led an tennas.00. 30 day money back guarantee (less slh) on orders from MFJ • Free catalog . 300 watts PEP output. No meIer.. -rMFJ's new VHF ' -. $12.w.. '229DS MFJ's smallest Versa Tuner MFJ·9Q1B 0 ' The MFJ901 B is our smallest . You get MFJ's new peak and average reading Cross-Needle SWR/Wallmeler with a new directional coupler lor more accurate readings over a wider frequency range. The MFJ-9490 gives you lower MFJ·9490 SWR than any tuner that uses S149 D 5 two tapped inductors.~ MFJ.•' ••. antenna switch. Ultra small 2x31(4 in. random wire.945C 0 ' $8 9 Don't leave horne without .95. Mobile mount. ~'"- . . It reads forwardlrellected power in 200150 and 20001500 watt ranges.. $1 2. __ __ feedbac k.. The MFJ-931 also lets you electrically place a lar away RF ground directly at your rig . $3.8-30 MHz. 101(3x7 inches.986 The new MfJ-986 Differential·FM 9 5 2-knob Tuner uses a differential capacitor to make tuning 100lproof and easier than ever. 8x21hx3 in.w..wt en both space and your budget is limited.0 . Why? Because it has more features than tuners costing much more and it matches everything continuously from 1._. With MFJ's deluxe 300 watt PEP tuner you get an MFJ tuner that has earned a reputat ion for being able to match just about anything .Neecle SWRIWattmeter with a new directional coupler for more accurate readings over a wider frequency range. TELEX: 53 4590 MFJSTKV MFJ . verticals. Box 494. beams. . $289 MFJ's Fastest Selling Tuner The MFJ·941D is MFJ'slastesl selling MFJ·941D 300 watt PEP antenna tuner. Add $10 s/h. isn't that why you need a tuner? Covers 1. 1000 V capacitors. The roller inductor lets you tune your SWR down to absolute minimum. $49. You can operate all bands anywhere with any • transceiver wh en you let the MFJ·1 601 0 turn any ra om wire into a transmitting antenna.~.•. dipoles. go out and adjust your mobile whip. MS 39762 (601) 323·5869. Miss. •_.. MFJ-920. SWRfWattmeler reads fowa rd/ reflected power in 30 and 300 watt ranges.. Covers 1. . . It matches whips. b=-="""".1601D 539 DS 0 0 _. .00 slh (except as noted) . Meter lamp uses 12 VOC or 110 VAC with MFJ·1312. INC.8·30 MHz. Efficient airwound inductor gives lower losses and more watts out. "':~"= ' this mobile tuner! Have an uninterrupted trip as the MFJ-945C extends your antenna bandwidlh and eliminates the need to stop./ tuners cover both • -. Install a wire anywhere! Tunes 1. Wh y? Because you get two continuously variable capacitors that give you infinitely more positions than the fimited number on switched coils. TVI and RFI when you let the MFJ-931 resonate a random length of wire and turn it into a tuned coun terpoise.8·30 MHz. Antenna switch selects 2 coax lines. 51 OgDS MFJ's RanC/om Wire Tuner MFJ.one that is highly perfected and has years of pro ven relia bility. You get two husky continuously variable capacitors lor maximum po wer and minimum SWR.. by tuning out the reactance of your ground connection wire. no matter how far away it is . You get MFJ's new lighted z-coror peak and average read ing Cross-Needle SWRIWattmeter. 4:1 balun. MFJ-20. It reads forwa rd/ re flected power in 200/50 and 2000/500 watt rang es. '59 -:.. 1 0 lj~ x4 1hx 14 718 inches. -:- MFJ MFJ ENTERPRISES. mobile whips. 200 watts PEP. Add $5. (and most afto rdable) 200 watt PEP tuner . camping operation.. efficient airwound inductor. verticals.8-30 MHz. banlanced and coax lines. -- FOR YOUR NEAREST DEALER OR TO ORDER 800·647·1800 • 1 year unconditional guarantee .0. A new current balun for balanced lines reduces ieeosne rad iation and fo rces equal currents into antenna halves that are not perfectly balanced for a more concentrated. making quality afforC/able CIRCLE 86 ON REAOER SERVICE CARD MFJ·931 You can create an artificial RF ground and eliminate AF " bites".. Has eoosnon antenna switch and a tenon wound balun with ceramic teeotnru insulators for balanced lines. It ends constant re-tuning with broadband coverage and gives you minimum SWR at only one best setting. Barefootl1. Has 4:1 balun. Small 8x2 x6 inches uses lillie room. 2 Meters and Ihe 220 MHz bands. You get MFJ's new peak and average reading Ooss. Add $10. State. And lots of inductance gives you a wide matching rang e. vees. balanced line or tuner bypass. 51(2 x6 inches . vees. MFJ's Mobile Tuner "" - •. Meter lamp uses 12 VDC or 11 0 VAC with MFJ-131 2.. MFJ·9Z1 569g51 T"~ ~. and 4:1 banm . $12. all in a compact 10x3x7 inch cabinet.•. random wires. . 3-digits turns counter lets you quickly return to your favorite frequency.962C For a few extra dollars.5 KW Linear Tuner MFJ.5 KW PEP linear amplifier later. direct or through tuner.. It matches dipoles. SWRI Wall· meter and eeneenem placemenl of cnnlrols make tuning fast and eas y whil e in meuen. Meter lamp uses 12 VOC or 110 VAC with MFJ·1312...95.. \ - " . motel.95. I pointed a small X-band and pe rsistent prying with a knife hom on the input of the spect rum will separate the halves to reveal the analyzer (a Hewlett-Packard 855 IB \ / high-quality electronics inside . na . The other co ntains all about 40 hertz. 800 . and a spectru m model. 4 4 11. Care ful G H:.6GH:. and . molded plastic cove rs most radar detectors" made me wonder if of the RF circuit board and forms three dual op amp .:. About 60 di screte com poT hese self-contained receivers arc designed of the moralized plastic also provide shieldnents rou nd out the circuitry. 7 16-662 square! Use great care when han 0522 .O .525 GHz A dozen screws fasten the plastic (also 24. If th is device is meant to receive See Photos B and C. with a 844 1A pre -selector) at the The detector's circuitry is divided horn of th e radar detecto r and between two printed ci rcuit boards. Tel . 199 1 .62 be the most difficult pan of the en. these dev ices might have a useful app lication sides of the ho rn antenna . The finished product (1I'ft ) and the original radar detector are two SOT packaged transistors 1405 Xenium Lane N. Compaon a third daughterboard . Removing the cover reveals that device s on the market.4 lator( 's) energy . Opening the case proved to well radiale some of its local ascii11.125 GHz in Kchand). The m ixer diode is inc redT rorucs.B.4 G Hz minus 10 .M . C . radar energy around 10 . The tiny dimensions of the etched series detector for very reasonable microstnp lines testify to the very prices.6 GH z t GHz CERAM IC FI Lr ER this project) . And sure enough . and a 78L05 voltage regulator. Block diagram of the radar detector.-----C--..25 " x 4. ether modem detectors may analyzer helped me ascertain how be usable . Company is located at high frequencies involved . Some sections ter of the board . February. Orchard ib ly small -o nly abou t 0 ./oll. too ..O.-----.5 GHz Am B sho ws the detector' s RF ci tatcur Rad io Service allocation.• PO Box 32 . previousny had been se ll ing the BEL XKR Iy hidden underneath (see Photo C). cheap.5 " two-piece plassupe rheterodyne receiver . There PhOf(J A. the radar detector inM icro-Eye is a du al-con version supe rheterodyne X-band and K-band structions didn' t include a schematdetector ..56 11. j ust cover to the circuit board . Noll WA6EJO T he abu ndance o f so-called "police tor ICs (MC3302 and LM393). I just cou ld n ' I res ist! (The C . then PROCESSOR BOA RD The contro lle r pri nted ci rcu it there may well be an IF between Figure 2. cuit board and metalized plastic Ahhough there are plenty of these horn. However. signals arou nd 10..B . Although this article apic or theory of operation.M . Tel. The Of cou rse.7 MHz 2nd o f thc RF circuitry and a ho rn antenthis was not the only local oscillato r vco <:» L. by Steve J.. this device worked . These two boa rds conveniently involved .~ E)-e experimenter. board contains a cou ple o f compa re11.6 GHz sect ion of the detector (not used for (see Figure I ).O . This p lot shows lhi' detector's VCO sweeping f rom 11. Snooping. picked up a weak signal sweeping LM3Q89 One board contains the contro ller between 11 .0 GHz-IO. The circuit boa rd A custom co ntroller chip appears in the ce nfor the amateur microwave experimenter .38 11.--- / v rv 10 73Amateur Radio Today .328-0609 or cont act BELpackage. 10 detect police speed-measuring l ing for the mic rowave circuitry ..50 11. Photo above the 10. but it turn s out that 10. cro-Eyc model although any of the How It Works (More or Less) XKR series shou ld be similar...Figure I . itself serves as the fourth side .• Radar Detector to Microwave Receiver Conversion Listen on 10 GHz..25 " x 4 . 20 Center D r.525 G Hz . plug together via a 6-pin connector.4 G Hz and 11 . an LM358 Metalized . The sweep rate was 114 -11.525 G Hz.) dling ci rcuit boa rds with such miI opted for the BEL XKR-IX Minuscule dev ices. it may tic case . The M icro-Eye is hou sed in a Experience dictates that if this is a 1. and whether it I could be useful to the microwave I Inside the ~licn. plies speci fically to this particular just plain guessing..0 1 ~ 30 MHz/d ivision Park NY 14127 . and a mixer diode in a " beam-lead " Minneapolis M N 55440-9176. tire project! It 's glued shut. it does. (righr. many of them are expensive for experimenting the microwave circuitry is actually with . 7 GUN N RADAR DETE eTOR MH z c e r a m i c fi ll e r DIODE which in tu rn is preceded by a couple of what appear to be microwave trans istors . Foil side ofthe PCB .7 M Hz input .64 VOI I DC input made the VCO generate 11 . Schematic ofthe new CircUIt board. If that pin is bent so that it doesn't mate with the connector . ! veo veo R6 o I ~. mixing the 11 GHz received. a lo ng wit h pro vis io ns for an S -mete r an d AFC .DUND H • • ba nds a re de tected . . Fe brua ry. Ul. The VCO d re w only about I rnA . it's ha rd Figure 4. especially si nce the radar detector will be receiving Gu nn diode signals in its new life . which is also fed by the I G Hz I) 1\ second LO . The first LO s ig nal on the rig ht is mu ch broade r than the G unn d iode signal o n the left. the II G Hz being ha nnonica lly ge nerated i n t he mixer diode . To c heck fo r pu rity .9 valls yielded 11 .E nNE probab ly ge nerates sigC6~ ~C7 "J nals fro m 22 .5 G Hz . Th e sweeping of the fi rst LO freq uency is probably done 10 make • > _SV OO TP\J T {NOT USEO> ca ca J 2 U2 B sure that any a nd all sig=11 VtJt. wh ile the first LO is comprised of the two SOT I packaged transis tors on SIG NA L I the microwave daughter1 2nd L O GENERA TOR board.2 G Hz for the recep. such 11. and Photo C). and their 1 GHz poss ible mixes.iar with a 10 .UM[ nal s in the two radar "' 5 >---::h~ . 100 KHz/division 30 KHz/ diviSion . T wo things still analyzer re vealed a strong signal at about I must be do ne : I) Stop the first LO from G Hz." "' " ~" " [)f'TIO"" ~ TUNI NG / ' • "1 H[ T[ ~ "' " r'. the probably generales RF at a lo we r fre quency . s ig nal down to Figure 3. a 3. Although a G unn diode signal might not be considered a pa ragon o f pu rity. Figure 3 shows the result.0 G Hz. Th e VeO /m ixer 12 V t+ TUNE diode combination a lso . tor might be easily ad aptable 10 rece ption of Amate ur Rad io Service 10 G Hz F M signals. the firs t ite m . This first LO . 2) Dete rmine swept in freq ue ncy .. and 10 make critical RF stage 6 ~ +. Modifying the Detector ea The presence o f the TO lH30B9 PI N 1 TC ~ M 3 0 B 9 PI N 10 L M 30 89 F M I F ch ip TUNING hints that the radar d erecFigure 5. while 5 . Note that the significa nt " pulling " e ffect of moving one' s hand in front ofa Gunndiode 73 AmateurRadio Today . -M[TER tio n o f K-ba nd s pe e d AUDIO OUT >l2V a rada rs. TuNE U1 CO""'.7 MHz (see Figure 2 ofa Gunn diode oscillator. a n a ud io output. a variable bench supply ca n be hooked to it. The I G Hz second local oscillator is a TO-92 pa ckaged tran si stor . "Sniffing " as those generated by M I A-Com Gunnplexaround the circuit board with the spectru m e rs or So lfan transcei vers. ~ • U H z F OIL u SIDE z 0 Figure 6. is ac tually a (Voltage Co n trolled Oscillator. T he first t ransistor amplifies the I • G Hz signal f ro m t he microwave circuit board a nd passes it on to the second tra ns istor. aid of a spectrum analyzer . Pans layout. This " seco nd LO " signal was no t sweeping and make it tunable . if the two LOs ha ve sufficient purity and Furthe r exami nat ion re vealed a welcome stability . s ight: a standard LM 3089 FM Rece ive r IF It turns o ut to be q uite easy to accomplish Syste m chip! Now here is so me thing famil - "' ~ [T [R PAR T S PLACEMEN T Figure 7.~ 23 . "' . of course. A comparison ofthe rada r detector 's second LO stability to be sure even with the to that ofa signal generator. A comparison ofthe rada r de tector's VCO stability to that 10. " . it does provide a valid guide.) Act ua ll y.8 G Hz to . In my unit. W it h s o .525 G Hz.2v INPuT • alig nment unne cessary . The first LO is powered throug h o ne of the pins o f the 6 -pin connecto r that connects the RF and controller boards. This is nor good. ma ny sig na ls. The input of the LM3089 is p receded by a 10 . 1991 11 . I observed the first LO signal on the spectrum analyzer s ide-by -side with a signal genera ted by a G unn d iode oscilla tor tu ned a few kH z away .6 G Hz minus 10. A clever approach . Februa ry. Photo C. is noisy. pability of the radar detector . abou t 10 miles from the beacon..·ith the hom extension installed. Photo E. I was sold on the fact that a modified police radar detector should make a great microwave bench-servicing tool and portable field-test receiver. ·_. The finished unit . Th e q uestio n re maining is whether the fi rst LO signal is good enough (0 receive clear signals from the kinds of tran smitters mo st amateu rs presently use on microwave...O. but it was surprisingly stable.O . The audio amplifier. The finished unit with the cover open..9 volts. It was also sensitive enough to pick up the 10 GHz calibration signal of a I N23 diode driven by a 2 meier handheld (see "Xband Calibrator" in the April 1981 issue of Ham Rudin ). I can get a solid signal. ...5. " in the January 1987 issue of Ham Rad io ). the I GHz LO signal (right) is identical 10 the signal from a TS4l9rU signal generator (left). And this is using only the radar detector's tiny horn for the antenna. " X-hand Beacons. • L . it can be tuned to receive in the amateur portion of X-ba nd by powe ring the VCO used a s th e first LO with a variable power supply. Reception of a familiar. The I GHz second LO signal is much more acceptable. The LM317 circuit used a IO-tum pot for voltage adjustment. 12 73 Amateur Radio Today . This circuit was designed 10 cover 3. Controller board (not used) on the right. or ) J ." • - _LO.I Phoro B. Also. I rigged up a perfboard circuit with an LM317 variable voltage regulator and an audio amplifier (see Figure 5). c . This perfboard replaced the detector's comrolle r circu it board. an LM 380. was connected 10 the audio output of the RF board 's LM3089. Checkout I have had an Xband beacon in continuous operation from a local mou nta intop for some 10 years (see my article. OU I of the VCO .~ ' . Inside thr radar detector. I parked there and just pointed the modified detector through the car window and slowly turned the JO-turn pot-and there was the beacon's MCW ID signal! It wasn 't strong. Time for a DXpedition! At a convenient location near my house. transmitter hom is absent inthe radar detector. bet reasonably stable. _ Photo F. 'OMI. Further tests performed on the bench revealed that the modified radar detector produced usable audio when receiving signals from my MIA-Co m Gu nnple xer tr ansceivers. A close-up ofthe RF circu it board after the plastic cover has Men removed. 1991 At this point we know that the radar detector can receive FM signals due to the presence of the LM30891C. The easiest cheek is 10 just try it.64.O GHzI J. " known" signal from this beacon would prove the ca- Phoro D.. real-wo rld. In Figure 4 .5 GHz . RF board on the left. The firs! L. The component side o/ the new printed circuit board. toggling between the two at any time. WA 98036 206-775-7373 CIRCLE 65 ON READER S£RI/ ICE CARD . Any front panel function may be programmed by the computer. See your AEA dealer today for a demonstration of The Morse Machine or contact: Advanced Electronic Applications. it will stay there unti l you write over it. The Morse Machine can be programmed to be an automatic beacon . You can use the front panel knob to adjust your sending speed or enter a precise speed with the keypad. P. This makes loading memories as simple as typing them in from your keyboard. or Dr. The Morse Machine can display your random code. You can also add remote switches for 4 of the memories so that you can instantly send your responses or call CQ. answe r a CQ. • A random word generator that randomly generates 4-letter words for a more realistic practice session.232 compatible 1/0 .O. The 20 memories are soft partitioned so that your stored messages may be as short or long as you like. Exchanges can be speeded up by having parts of your message sent at a higher speed. This can be used to automatically repeat a Morse (or RS. A computer can be interfaced to The Morse Machine through its RS. allows random code group practice with steadily increasing speed. Box C-2160 Lynnwood. Whether you' re an expert or a novice. The Morse Machine has three ways to help you improve yo ur code: • A proficiency trainer. Of course.232 ASCII ) message at a programmed interval of I to 999 seconds. all memory is backed up by an intemallithium battery so that once a message is loaded. You can call other stations. QSO practice sessions on the computer screen. or just sit back and listen to realistic QSOs very much like those you would hear on-theair.000 characters of memory that can be stored in 20 memories. with automatic serial number insertion and incrementing in any memory message. Memory can be ex panded to hold up to 36. The Morse Machine is a full featured keyer for the serio us contester. • Dr. the same as the one used in the MorseMatic.The Morse Machine has all the features you've been asking for in a high performance keyer like 2-99 WPM speed selection and over 8.000 characters. Inc. QSO (tm) QSO simulator based on our program for the Commodore 64 computer. 995 Mhz (TX). The easy LCDdisplay lets the operator know. · Scanning Features Memory Scan. 1. CALlFORN tA 90501 Tel : (2 13) 6 18·86 16 Fax: (213) 6 18·8758 CIRC LE 6 1 ON READ ER SERV ICE CARD .at a glance. VHF/ UHF Switching 6. Program Scan.995 Mhz (TX). with the optional tone squelch unit.130 . Shifting to call mode 4.173. This allows for selective receiving. LOT 130. 6 Channel Steps (5/10/12. · ARM (Automatic Repeater Memory) Function 10 repeater channels can be memorized DR-S90T automatically. Modifiable fo r MARS/CAP permits required) FEATURES · Simultaneous Receiving on both bands at the same time Scanning intermix scan model on both bands at the same time. 38 Sub-Audible Tones built-in 5. scanning SlOpS at vacant channels and pauses. Direct setting of frequen cies In VFO mode 2. ARM Scan.449. TORRANCE.shift frequences. the Ham. The DR-590T is packed with more featu res than most hams will ever use. shift directions. and channel steps In each of the 28 memory channels.147. the o Memory Channels The unit has 28 memory channels. ALINCO has listened to you.OO . • ABX (Automatic Band Exchange) Function • Bell Function • Dimmer Function Selectable 2 different brightness of LCD light · Three Priority Functions VFO Priority. Up/Down of memory channels in memory mode 3. Additionally. • Independent VHF & UHF Controls • Detachable With the optional remoting kit. While ARM mode Is active. You can program set tones. 438 AMAPOLA AVE.THE REMOTABLE TWIN BANDER The ALINCO Model DR-590T Is a full featured /dual band tranceiver that is user friendly. Memory Priority and Call Priority. · Ultra-Compact Body 5-7/8' (W) x 'I: (H) x 7' (D) code squelch and tone squelch work together as a powerful calling function. ARM (Automatic Repeater Mode) 5. • DSQ (DTMF Squelch) Function · Code Squelch Function You can program a 3digit code that will open the squelch only when the same code signal is receive from another transceiver. and more Scan.5/15/20/25 Khz) 3. Setting and Selecting DSQ codes 8. And we did it while keeping the operations tru ly user friendly. and puts the fun back in Radio.995 Mhz (RX). This function Is useful to find vacant repeaters.. and 10 ARM memory channels (40 channels in total). · Repeater Operation The DR-590T can be used as a cross band repeater. the front panel can be seperated from the main unit. 440. But it is engineered so that you don't have to be an engineer to understand and use the various functions. then starts again automatically. And Many Other Features ALiNCO ELECTRONICS INC. DTMF Monitor Function 4. one independent 'Call' channel. Auto Dialer Function 2. Up/ Down by I Mhz steps 7.and incorporated many of the features you told us you wanted in a Dual Band (VHF/UHF) radio. Setting and Automatic Dialer t44.00 . 410 -470 Mhz (RX) (Specification guaranteed on amateur bandsonly. which functions are in operation. • Full Duplex Cross band Operation • Others 1. · High Power (selectable) · Various Useful Paging Functions for Grouping Calling and Individual Calling • Remote Control Microphone High: 45W at VHF Middle: lOW LoW: 5W High: 35W at UHF Middle: 8W loW: 4W · Extended Receiver Range With this microphone there are several functions that can be controlled remotely. Band Scan. ...... _ .n ~ _ nu_ _ uuv.: ." - "' _ _ .on 0' I'll'" """lIlh '1' .. The cost is lo w and the perfo rma nce is quite optional zero-ce nter tuning meter wires dith ing .OO CIRCLE 1 72 ON RE"DER SERVICE e"RD 73 Amateur Radio Today ' February..50 shippingfhan· allo w measureme nt o f the noise figure dl ing. The latter modifica tion would NOle : A blank PC board tsa. B . HM1... The other... CO"".. ICor'O<oI '" •• _ o . PIl1.. ~ :t AMft.. . . Cl 25 llF e1eclrolylic or tantalum C2 O.lpllll.Eye presents a bit of a problem You mayconmct Stel·e J. fit nicely in a respecta ble .o m r. 1 .J!}t..nll on· VoU-o. 5 10... Note board) matic Frequency Control). . may be int roduced if the sta nda rd waveguide flange o r coax con1 PC board s pea ke r is mo unted too close to the necto r.. ..uIO"'CldOi .T:s . _ _ . c. An S-mcter. ' VHF SQ. _ ." un. "'"' • . "'' Illng!.. 'AulopelCI'l aulO 011.. B 1Ir:t: YolI.......nnount'tCI u....rlCI. The ex te nsion sleeves inside of the ex isti ng horn (see Photo F) .·wall fixed 6-pin connecto r that was re moved from recepuon ot the 10 GHz ham band .. This device should serve as a rectl y to pins 7 and 10 of thc LM3089 . M. • • ..Qn. " ' T. 5-meter....111F C3 100 llF eleclrotytic or tantalum C4 4.. _ _ cse """'.proporll_ co_sy bHps lI""l lnii":... ' PIO.. n .."""'" ""'" cseo....... luncl' _ ' II AoglI"ll Pollt.. cou rl. a nd Figures 6 & 7) . "'" == ' . IOoq. $000 .. _ .. a Field Court.lfr .. c1d """.OCIItIu.. •.cl ' Us. !orcentar·tune meIer.....A movement Be sure to test the final c ircuitry before You could try modifications I didn't &pin con nector plu gg ing the new circuit board into the attempt ..IIFQ . R."'lI"l!'Pul.-wall fiXed abl e . Its hom does work quite nicely..a>Ied & pao~ l'" IftCi "'OU'ltS & ~ ~ _.. . 1991 15 ...ol. an 1610WDC orbetter.-g toOO'"' ~ ' .01 Inpul' ~_"'''' 10uehto." I. I found that everyif you want to change the anten na ..."I. ~"""EV!l u-<a_ $ •... _ I 1511_" ...loqiMocM... .""" _ or S. j . r.n. .. The Micro.. Reme mbe r: You must be very careful The next step is to tidy up the circu itry .. T wo to-turn pot s RI 220 ohm V. eon. . con- c. I made a n extension to the integ ral molded horn .... One .71J...S 1711..lo ". result is a circu it board that plugs into the III Horn Antenna Extender Micro-Eye RF board .. " IIU 'ChaM of CS60 S M.ly II..9"_S!!. ' Dull H....5 GHz). '_.' .. 100 IJ.... .. r ...1 NO '"'" _ t>..1l5 .... T. .. Its anten na Winford A\'enul'.11 call1nl perty h... -wa" fixed R2 1k 10-turn pot (coarse tune) with counting dials are very desi rable R. 32 0.. 'SO 1..~ I oon POll "'p ..:. • • WOt1<:t In all H..... side ofthe horn! UI LM317L .. .od. useful accessory for the microwave amateur . ' Mod. or vibrat ion -induced the hom a ntenna with an adapto r to a 1 a ohm speaker feedback .ariable voltage regulator G Hz -10..1 · 5cJln upoilown . eneore from FAR Circuits.. ~"....7k y..F...I_IOTXlh'OUllh remol. _p:!sI=-. 'Voice dock • • KulH _ I I "3CJ()."" o»o<a. .. 18N640 molded plastic s hield ...... Inc . Of louchlo .T " _ ..oM R""'" ._ t! OIl.p . . replacing the o rig inal controlle r board .. 1 10..1 .tl~ Po liN 10 I8II:t· $OI1. · . 'u_ . ·Qul e~ OS q u.... mand:ttrln 1 ·2 hl ~ in M" " lnpUII Pl ck... .".' p P'O!oc'~ ! " ~ ~ ~ei"& p$.R .... .AT... ..-. You don't have a handy coax connector or waveguide flange to hook things to . dolliM<! multl·lo . 1 11F C6 1 llF electrolytic or tantalum C7 111F electrolytic or tantalum is rather closely integrated into the entire RF board design..."ol••UCI1 0 rnonIIO.It.. Perfboard is 00( a good medium for high gain amplifiers ofa ny frequency .1 A~ 0.rol IIOf~ 28 d lll lt CO .Parts list T he Fin a l Design CspscitOfS...1'1" w_ty --su~ Macros~ IIMI" progr_nlllanll.... . R2 ... PTT'lod mode III000T... v. R3..:J.. ' AOlor cort!rOl . Field tests verified a ma rked to each particular M icro-Eye receiver... A printed c ircuit board 's solid groundplane hel ps keep unwanted osc illations a nd feedback unde r co nt rol (sec Photo D Resistors. .....r:<. . ....·wall fixed R' coarse tu ne . As an experiment .S 611... . S1511 . 3 ·oPDT2 A . ... S lOll.I_ rNJN ' . M2 100 IJ.• • • 0.... d ... "'oa ALe x _ ..........~II••t~.sy _PI Nc h ". 1000 (18 d' lI" ) ... .. _ ... o".:.. 1 1 0'" 12 de ...•. ..Ton. _ Csr." ~-!. d.. cy me ter arc opt iona l add-on 's .. IO·. -:::.'_ ce.. MOo demd"l· " .. ' YoICOI .11 .I...oI ClllIiI IIMI" Ko... . 00<l So> I<t ' 0 _ "'"' . Plck.u 0 0 _ _ _ C64 o..trlCleCI PIlCh ·T... . 390 ohm y• •walt fixed R5 10kpot(volume) R4 and R5 set the ra nge o f voltage availR' R7 2. ' uonllO' _ d.. _ It """'" .... apII1Ml1c1 ·11SCOln . fashioning it fro m double-sided copper-clad prin ted ci rcuit board .' o.. 5• 'CTess T_ Peglnll ' CW f'fK1ICOO . The 7" x 4 " x 3" plastic box (see Photo E). call &llIn _ iolIll.. ""on·""..al ·Call ••lllnll IU 'O ..... ...~ .....· 16 h I.. C.A zero-center meter Th e ne w circuit board ca n use the rada r detector is eas ily mod ified for R8 4. _.. serves as 680 Ohm Y. ' """·. ' ''UU.ess COdH ' 00101< & PrlnI"'Io99. . contr ol I...01ce"SKurIty mode. _ ..os twoa'" TlCN.. The the unused controlle r circuit board . ._ CS I" __ • I _ _ " - ~ '=' ~ ._ ..._ .1 '111 8 "jt:l. is fine tun e. Ventura CA 93004-2504. ..F electtolytic or tanlalum C5 O. . ' 1....""" '" _ 0.. Noll WA6tJOar /288 Packaging is up to you ...l L... and would probably make a satisfactory feed for e ! ' to 3' d ish ... l'ncI 0101 .. 100 ohm to-turn pot (finelune) for tuning the YCO .1control· II T. The values sho wn allow luning not to touch the mixer diode located inthrough the entire amateur X-band ( 10.. c"'" SI'lKk 6<1 Manual .ng ol.. P1"... ~ on 'VOICI "OIor con"'ol' lIMr _ 1 _ Co--.-o-l <li_.... con1r01S ' 2. lln~ pr O"'o.'2V!lC OVM. .... ". especially the added audio amplifier."" S25... improvement in sig nal strength....... . .. ." . • c:w · Olgllel lnClud'ng CM..c a nl W" DiNt''''' ~n... .1 I ':t r.. ' .. including a NiCd battery..3 Ohm Y.....':'i.0 SemicOnducfors ... This extension adds an estimated 8 d B U2 LM380N aud iO amplifier These values may ha ve to be adjusted of gain.. o r re placing 2 ten-turn counting dials that m tcrophomcs.. m o. a nd a freq ue nof the rece ive r. such as addi ng a n AFC (Auto(temove from unused controll8f circuit radar detector RF circuit board .. zero-centertu ni ng mete r. Dundee IL 60 118 for $6 + $1 . ~ . :.:.OlCOO .$ ".lllmU II. """'"'l! . ... Th e BEL Mi cro-Eye police s peed Optional. phon..... .. ! ale .. The 1500A can also be used with a probe to measure computer clocks.100. 398 NE 38TH ST. 5246L or 5246UM. aircraft . FORT LAUDERDALE .95 (lor HP counters) . etc . The 1500A can be powered by 9-12 VOC. marine. FREQUENCY COUNTER 1-1500 MHZ 9.. The excellent UHFNHF sensitivity makes it ideal to use with the telescoping antenna for easy and acccurate measurements of transmit frequencies from handheld. " $179... 110VAC adaptor included . A 10 segment LED bar graph displays signal strength of the input signal. 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(305) 561-22 11 FA'" (305) 561-9133 ORDERS TO US & CANADA ADD 5% SlH ($4 Min. ham. l:! ·r - 55 BAR GRAPH MODEL AP·90 Extend the range of any counter capable of counting 16 MHZ or higher to 1600 MHZ with super sensitivity of 1-5 mV RMS typical over the entire range . COD $3.. INC . TELESCOPING BNC ANTENNA $99. fixed or mobile rad ios such as: police.300·1600 MHZ..STARTEK MODEL 1500A INTERNATIONAL . FL 33334 PHON E. . .oo ...0. no$.50 SHIPPING ...• .. .. .. SAN DIEGO CA. .... "... ~ "5..... Art icles and columns are assigned feedback numbers. .~!.von IV' _ . LEARN TO aUILD AND PROGRAM CO M PUTE llS WITH THI$ KITI .."..1Hz Ouacl T. I 6__ CllT '1'0.llSUI F1uible Kiolr.' C"' .. ANY FM XCVR ..3l P.\.... . please check the box which honestly represents your opinion of each article or column ....'.........~(~!!~ Rcaly to t'se FEEDBACK FlIU L<......l!. SuPPlY XP-16-S 1249 .. . .'"' _ -(II .. Ordu UOl_L -: \ "C:P800·926. . . tor""". ~ 51............. .MHLY..... _-.....1251 .... 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FREE OMM 101 0.. - Triple Pow.... ond " ' " .... _ OCIO $OMH.. lalDO <C.i' \q~~o S~?i ~ r. . <n ... _ _ . _ '" .. we draw one feedback card each month and award the luc ky winner a 'ree one-year subscnpncn (or extension) to 73 . _ -.......I... ..... _ _ ca.. ' _ - - ~ -IIOOO'OC:I ... ".$435 CIC . .. ........_-.. ..'QlOo1l S/i ·9OQO . _ -. _ ... 5CV'"' .f-_ m • llloro C..'-_ _. MOO RADIO ENGINEERS 565-1319 3941 MT.. .... ..1-..c. ot Pu!>j!<: Dm.... ._.". we recognize the need 10 go directly to the sourceyou .. .. ~ -'. .~~~ __ . COMPASS GIVES DI RECT ION.'OC"... ... ..od _ $900 •.. . .....-...... 1OOllOS.nd UO""" . 'I~ p u.. '0010. ~ _ r J _ ._----. '.. whi ch appear on each aruciercctumn and are also listed here .. . _artlI"'Il"" T. . Cursor "..._ . hard look at what you do and don't like.-_v·.oc. "'''-'''.......~---­ . • y. ... _ loOM 20M Hz Elenco Osc ill o scope $375 .-__ ..'''' S58..... ... _. _........ ~ .a2111 CIACl£ H ON RUDER SERVICE CARD CfRCLE: 76 ON READER SERVICE CARD and put them in an envelope? Toss in a damning or praising letter to the editor while you're at it. _ . 51)45 6011Hz 0uaI Trace .95 ~ -.. ROt .. ._ "*"'_. . In ou r continuing enot rc presenllhe best in amateur radiO features and columns. Or (V-. To show our eporecieliOn..t 'obr<xeAJapo« AJ" is I'<>sr" lha. · c ~ ' V_..... VC~ . "" ... .. ...• •I'" VC~~ U ~UIO 5ll.' .1Hz Dual Trace V·1065 10lNHz 0uaI Trace . sn 95 ..~ V·1085 l(l(1... .. . I t:. .. '" aooouor...... .. .."""' .7373 fOfTmlllfopa<t KDolII CIRCLE 138 Ofrl RUDER SERVICE CAR D HamCall / CD·ROM These numbers correspond to those on the SOO... .. _ -"""' " -'_ ...... • o CIRCL E 184 ON READER SERVICE CARD 73AmateurRadio roaev » February.. •. ANY SCOPE ·eo_ ... .. All for the low. $1... _ _ .6S).'0001 T_ 1>•• " -Iw.• '• . ...-cr FlNesl l llSUll TOIlltlt ~o ~y TI1I ~ Coo Feed 3000 V . .....<:. ...--..... oo CD-"OO'O """ _ .... . _ .. ... tl ... _. ..""'..'•• . ----------. "CIC_...m•• nd D. oo...95 .0' " . FOR SPlCIAl PllICIIolG ••• - .. .195 6OUKlDualTr._ _ . ".. I.• _ . . _.."'_-. lC.l.. 11 " I to< E 103POS1 ... ARMS FOLD FOR S TORAGE . _ ._--.. _0. COOn..1 . ..- 83 FuncllOol Ge<-otoo '" " '" '"" " " u"'" _I.. . 0<. $uppIy Xp·62D .." 10> Sl995 ..."' .- SQ·tilOD .w.._ .Chal...... the reader. .ace... --'--_. MUlTlMEtERS 21 F ."..""" - -"'$-_1 '. Io. 10.. _.~ .... $18..... 51 -..." ..on.... "''' _ _ ... ~ ..." '<>II " OOVI \.. US ES .. why not fill out the Product Report card and the Feedback card e. TYP E VF-14 2 CO VE RS BOT H 2-MTRS & 220 MHZ...WI" \... . _. Y ~ CA' _ ~_ V-Q] Do<o. D... .OC _ . '. _ ._. . 1991 17 . 3..".95 619 - QfYoS1?~2. M . 001 D..... T. ...D. _ ~ ....( 25 V-I06O I(l(1.OOO HAMS pillS ' . '''' $129 '''' ......_ _ 51.. oI_ Wo. .. w • ASZRC_ . P"'lIr. _5....".o". 10..nor <:. .. low price of 25 cents! Feedback" Title 1 Leiters 2 Never Say Die 30RX 4 Radar Detector to Microwave Receiver Conversion 5 UHF Source Dipper 6 UHF Field Strength Meier 7 Review: The Kenwood TH-27A 8 Future Modulation Amateur Television 9 Take a West Indies DXpedition? 10 Review: SHF Systems Linear 'rrensveners 11 Hams with Class 12 Pour an Antenna for X·Band 13 The MiCrowave Directory 14 ReView : The Commander II Amplifier 15 Homing In 16 Inexpe nsive 10 GHz Dish System 17 Above & Beyond 18 OX 190RP 20 New Products 21 Ask Kaboom 22 RTTY Loop 23 Looking West 24 Barter 'n° Buy 25 Circu its 26 73 International 27 ATV 28 Dealer Directory 29 Hamsats 30 Special Events 31 Random Output 32 Propagation 33 Updates Compact Series Scopes ..00 . . 0 1 1010 .. .-.. 00 we rea lly read the feedback cards? You bel! The results are tabulated each month . . _ ....nor sm s Hitachi Portable SCopes Y-2' Z T.. . 1/7 c.. $495 . ac .. " . . .. OTHER MODELS AVAI LA BLE.. . _-.. . TYPE VF-142 CA .. . •• • ~ Yc-liGl < f~ _ l{/I<H... 0 --- . _ "'"'I """'" _.o:z <0"". GF-I016 Func:_ ~otoo ~ '" 5249 _ _ _ .. V-l lSO lSOMKlOuacl T' <:..".... ""' ~"'­ . __.. ...... ~ \H".. . ST-1/l'O f'il5 ' O.. . v_••. .>0\''''' ' -........ _ .. Clg".ll.. _ s-o... .nor ~..1n feedback card opposite this page..._ -. flail". . />• • /0......_ ·_ H·'_ ..'.. .95 ~. _ -. ..._ _ oto (V·'OI!>rl06!>1. " ~ l In . 2-cr--t.. ..._ " ~ '" 101101 ·1000 $129.. .'_'.-_ . C .." V·I HIllA l00MHz Ouacl T. Bond Sig.oal DO . .. _ f .=•...1 C1apj... r----------------------------I COMMUNICATION S AOR Scanners. 40 ch i sec. 3. Great Service. FM tuning modes.13. · Earphone jack.8 V. · Cigarette Lighter Charger.95 Mag Mot Mobile Antenna. · Manual tu ning knob. 108-174. 455KHz or 10 . · 10 Scan Banks.25. Extended Warra nty. · Earphone. 100 Chan ne ls. Great Performance. · 100 cha nnels permanent memory... 15' coax. l Odb. Great Value. Hold featu res. 200MA BNC LCD w / backlig h t 2 1/ 4H x 5 5/8W x 61 /20.8.50 $45/$55 8-600.4MHz. MA lOO $25. · Backlighted LC D d isplay. We offer 100's of communications products.OllV WFM. Mobil e Mou nt.12. Hold Featu res.1Ct size. 1.075.35u V NFM. 10 Sea rch Banks . B05-1300M Hz Standard Featu res: · Extremely compact size. 5 Search Banks. 140z w t.805.7MHz 5 to 955KHz selectable/ 5 or 12. sca n. CAItO . search 561. · 4 AA Ni Cad ba tteries included. · Ca rry Case.00 External Speaker wi th mobile mount.58. UHF & BOOM Hz. AS.4 Watts In p u t 9 . Incremen ts: A u dio : Power: A ntenna: Disp lay: Dimensions: MSIOO 519. B-600MHz. .5 steps. · Channel 1 Priority.30-950M Hz .8u V Air. 1.5. 455KHz 10. · ~I t C lip . · Selectable Search Increments. · AM . 2/3 yTS Specifications: Coverage: Sensitivity : Scan Speed: IF. · Earphone Jack & Att enuator. .00 Ciga rette Lighter power adapto r.100 $59.8VOC.Hi. · AC & OC Powe r cords w / rntng hard ware. 5-955KH z. .Iu V Lo.0AM 20 ch i sec.406-5 12. CIRCLE 164 Of'l READER S£AvtCf. · AC adaptor / charger. · 5 Scan Banks.1 St' type anten na 25 to l 000MHz w SO'coax.30 11V 12. H igh. Extended Warranty. · Dela y. Options: 8. FM a nd w id e ban d. Free Freight 25-Day Money-Back Guarantee Toll-Free Service and Support No Credit Card Surcharge One Year Warranty LAR950 - $239 ---'- " ARIOOO $499 1000 Cha nnels.5uV UHF.oov 800 15 ch /sec.50 $40/555 27-54.lge. 21.1300MHz . Air. IX: BNC LCD 67/BH x 13/ 4Dx21!2W. i. Options: External Speaker. · Pe rmanent memory backup. · Selecta ble Priorit y C ha nnel. · One Year Limited Warra nty. crroo $4. 12ozwt. · Unrestr icted 800MHz CO\'e r. · Continuous (Overage (except UH F TV 600-805) · A n tenna a ttenuator swi tch . · Telescopic a nd flex ible Antennas w / BNC co n necto r.225. Sta nda rd Features: · Extremely com p. · Dela y. 2/3 yrs Specifications: Coverage: Sensitivity: Speed' IFc Increm en ts : Audio: Power: Antenna : Display: Dimensions: MSl90 $19. Low.5m m. 63) 45. Mobile Mount. scan. O p tions: Earphone. FM. &: BFO for SSB.OllV WFM. Satu rday 104. Fax Orders: 1-800-448-1084.Continuous coverage . «Continuou s coverage • Attenuation Programmable by Channel. & C. wide band FM.0AM /SSB /CW Speed : 38 en /sec. «Includes AC /OC pwr crd. $65/75 Extended Warranty.90 RS232 Control Package SCS3 $295. IN 46038 In t'l Voice# 3 17-842-7 115. 2/3 yrs. OC 500mA Antenna: BNC LCD Display: Dimensions: 3 117H x 5 2/5W x 7 71BD Wt.35u V NFM. MMI $14. Fishers.90 RS232 Control Package SCS2 $295. <Sleep and Alann Featu res. • Tuning increments down to 50H z. Mo bile Mou nting Bracke t. MM I $1 4. To Order Ca1l1. • AM.35uV N FM. EP200 $2.D. $65/75 Mobile Mounting Bracket. USB. M ntn g Brckt.50 Externa l Spea ker.OUV WFM. S peci fi ca tio ns: Coverage: Sensitivity: 1 MHz . Antenna. 45. 2(kh /sec. (add 5.5MHz 455KH z Inc rements: 5.. Approved P. .B V. 100KHz to 2036MHz.16 Search Banks. lib.m.$995 AR2500 $499 400 Ch anne ls.445 .2036MHz Sensitivity: . • -I Scan and Search Banks.One Year Limited Warran ty. . 1. Options: Earphone. FM. CWo . wide band FM.O. DC power cord. OC 300mA Antenna : BNC LCD. 2016 Chan nels.00 MS190 $19. to 9p. • Backlighted LCD display.64 Scan Banks. CW modes. 21b 100z. search Speed : IF.8 V.00) Prices and specifications sulJject to change. LSB. Lockout in Search. GaAsFET RF amp. 24 Hours a Day. S. search IF. Hold Features. Sta nd ard Featu res: • Extremely compact size. CIRCLE 1 6 4 ON READER Sf:RYIeE CARD .0275.00 (so ftwa re & cable) offers spectrum d ispl ay and database.00 (software & cable) offers spect ru m d isplay and d atabase.AM.00. In t'l Fax# 3 17-849-8794. Display: Dimensions: 2 1/ 4H x5 5/8W x 6 1/20 Wt. <Telesco pi c Antenna . 24 Hours a Day.800 .25 KHz Audio: 1. EST MasterCard.0275. • Manual tuning knob. American Express. backlighted . (352.1500MHz .7717 In AliSO States and Canada. 38 ch /sec.00 MSl90 $19. 1 MHz to 1500 M Hz Stan da rd Fe atu res . Service and Support Lines: Mon-Fri 9a.RS232 port bu ilt in. Checks. · 15 band pass filters. Specifications: Coverage: 100 KHz . 2/3 yrs.4Khz /-6db (SSB) 12KHz /-6db (NFM /AM) Audio: 1.2 Watts at 4 ohms Power: Input 13. . scan.50 Ex tended Warranty.12.O.m.5.'s.0AM /SSB/CW 20 ch /sec. 455KHz Increments: 50Hz and greater Selectivity: 2. • Delay. ACE Communications Monitor Division 10707 E. • -I Priority Channels.2 Watts at 4 ohms Power: Input 13. • AC adaptor/charger. l06th Street. 750. EP200 $2. 1.23. External Speaker. 1. 1. 736. Visa. Mo bile Mo unt.23) 1I98. • RS232 control through DB25 connector. this layout is particularly conducive to good UHF wiring techniques.. : HP. De/ails of the oscillator mounting plate (not to scale). As you can see from Figure 3. " "'T ll' P F ~Y " >60 ' ~ " ... PhOIO A. I boughta package of ) Figure 2.STOIt 112 _ o go 020<4. The UHF source dipper with its remote meter.. ACU .. see the hairpin loop as it ente red the circuitry being dipped . resulting in a very handy little dipper that runes from 400-500 MHz... use very shon .. Schematic for the 400---500 MHz source dipper.. As the design emerged. :-. as well as several others. !I.! Number 50n you r Feedbeck tlrd UHF Source Dipper The easy way to tune circuits from 400-500 MHz! by Martin Be ck WB0ESV M OSI amateurs who have used or tried to build a 432 M Hz dip meier are famil iar with the problem of the inductor being so small that it is useless for getting into UHF circuitry . I refused to budge from two requirements . Then use the actual components (capacitors..TU..'.[ [F JOMtISOIO caP u .. I wanted a physical layout such that I could look at the tun ing dial and . and the brass mounting plate must fit the box you usc. L "' ~­ • • _ K (U" o (Ito . 80 _ . lOMG... simply for claruy ...~ . near zero lead length-this is crucial. Lead lengths are shown excessively longfo r clarity. erc ... .•. The device described here solves all of these problems. '[ IoIOu~T'''' otOUS ' ... 1' " . This is the best way to avoid excessive leads around the oscillator circuit.... Photo B. It is small.... U TE I I . inexpensive. Note: The two pins on the crystal socket (hairpin coif socket) are soldered directly to fugs A and B. If you do.. ceramic FT-243 crystal socket.. (Figure 2 shows a blown-up version with too long lead lengths. Very short. In wiring this circuit.. 1991 I was lucky enough to have an old National Co.. Second ... without moving my eyes.4 " . 20 73 Amateur Radio Today " February. unusually accurate.. phenolic. are OK . and a beginner can build it in four hours.. The three figures here show the construction process of the dipper.. don't use a metal box. etc. resistor. Unless you are an experienced VHFer.-. The long ground lug and QJ source are soldered to the Cl grounding lug.J Figure J...--o7RXi..u.) to aid you in punching the holes fo r everything..nGotOUMO . All the so-called solutions I have see n ar e e ithe r clu msy ( " I need thr ee hand s! ") or mechan ica lly unstable. I '.. " [ TE P .'- . ... ". hu ernai ~ iew ofthedipper (lWte thecoupler shaft pkJcement). : 1 I ). . That meant having the loop on one end and the dial on the other.----. near uro leads are mandatory.. The first was that the hairpin inductor be no sho rter than 1 1.) Cut out and bend the brass plate to fit your box. Tefl on"'. Solder the feedthrough cap shields to the plate. Note that the holes for the capacitor and extension shaft must line up for smooth tuning . disaster awaits you! For convenience in replacing the battery . LuG ~. _ '00 _ ._... ... 1".. n.. '_ 2_ _ ...."~ .·. '"'''.. ..--.... _ _.... """".. "" ft FET ft>Vft I · '1 -. _25 _ Com"""""... ~ c. ion....o F... ' . 20..-... .... ~ _ • iii - .0. . tor h< _ F"'..FA· 22OlZ!O "'Hz) .. ...... .. pl..• 0<:1"'""'11 ..I _ _ .... M """"" .. ..:lO... ... _ . .. . S'''-PO''.... 30..'" 10: 5 1...~.......tiel teee' l.. -...IO_ 2lC """"". _ _ _ I o < _ " " . "" 12VOC [ _ <0 _ _ .. .00_ .. .. _ 0Id"'.c... . ...-ICOId ~ _ EAS. . "" SWls. -.so .. .. "0"-' S""""'... ..... I••' . "P ...0 0 _ 00<10 . Ml lot ..... N""'''' """" 0< noogt>botI>OO<I -... ...."" TV TR. ".U""... 48. -.... .. . ........ ~ PC ___ . I>'" <l<Op 01 .-wou • • _ _ .. _ _ ... ' " <:al4. ..... . ~ 2S m VIO SOO "'i'f' ~2$mV ' o$O I. y _ .... .... d ••••.ol ".. .."". "og _ lui' .....I _ . ....C0J... 10<:.od~'_ Clr*. . ~. . _ .. 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W_ ..-y... _ ....." .0" "'9"'" =0.. T".OOCE ..tv "'=:.__ _. ...og_ ... ~ _ _"". "" VHF .ATORS . .. .. _ "....... . .....' E..t>o ....-.....' '' .... """'" _E""''''''''''' _ 10< __.-... .on"... .. ""'---.-. _.pc. I lOllS . l"'CO/...... boO" Of .. ' -" ......... 00<10 inlt_ t>o_ up to ' 0 1 . ._ USAC. ."' ..«NI _ _ •• S29ts fR..... _ E...CItET RADIO •"nlOr '"" H. T'" RSQ..15 COlnllletllin 5. .p.. .. ._""'...A " 1)-')6 on tv tIOtIOf)" G.....I •..- S ~9~ l>. J"'· 1 " 09$ 1' 21lS ...- _ '" ' ... ... "' " .._..... _ M"'_ PA-OO E _luI " T il!> "'* '5 IlCIU.""'«1<N . _..._ I ... .. ...... ~_ ...luI O .. ~ _ _ _ _ " .. _ _ • 0< """'''''''' ca. _ .. -. ~ . .....-lII Six _ _ ~_ rit . .E $27 1ilS ACTIVE ANTENNA F\l4.. ..1 10 ' . _ . doy .. _ ""'-....... _ """"lJtl. Z _ FF T"". YHl'IUHF "... U '' ''''''' ' a.. . .... 129 95 1' 2 1lS FII-. ..._ .. . . 1 .... .... _ . ... . _ our tIO.. ~ yO"" _ .....= _ . ...._ 1'295 CSS _....fllVl '.. #09 AOV.PROJ ECT BOx: DO NOT uS E " ETAL eo. so replacing the batte ry is a rare eve nt.. $62. #12 EXTRA THEORY COURSE $32. ' o TMIC.C3 CF 1. 4 code lape s.95 2 theory tapes. $21.. ... Box 973. 1f16" thick brass sheet.95 @ T hi s Technician cou rse Incl u des 2 • theo ry tapes and 1 Illust r ated t e x tbook.95 r n-l 4 ~ " 6 code ta pes ...95 6 cassette t apes make It e asy to learn the code from scratch ..- . The dipper is totally po rtable so that yo u can take it to the counte r. February.K INC. exa m iner test packet. • . for upgra de f ro m • #06 GEN .TMIC K PLOSTIC . F CC Rule Book...95 This Advanced co urse i n cl u des 4 theory tapes . III Contact Manin Beck WB0ESV at 1637 Hood . .. AO IO SHACK l lie' x 4 ' L PLAS TIC . about calibration. • $62. 1 t e x t boo k.1 pF miniature butterfly capacitor 100 pF cerami c capacitor 1000 pF leedthrough capacitor Ferrite beads (2) 0-200 IlA meter 9 volt transistor batt ery SPDT switch (Cardwell 11 160-205)' Misc .. • • I I• I I• ~ i 83! RADIO AMATEU . C LEA~ PLASTIC SA"' E SOlE AS E_O 0 ' 8 0' ~AH • set . Now.•Fri. Phone: (603)635-2235. 15 wpm Co de Review 1 2·21 wpm Co de Review Pl'lce. InClude .. . Along with my UHF field strength meter (in this issue). .. It makes sense to use some other. With no AC source req uired. NH 03076. Pelham.. Ho we ver. $25. #iJ7A 2·WEEK TECH •• •• . a piece of snug-fitting insulating tubing must be used over L I . it would on ly take a few minu tes with a 500 MH z frequency co unte r . • $32. Wichita KS 67203.. an d 6 co de t apes (13 t o 22 wpm). Ideal N o v i ce to General.II6 ' 1 MIC_ SHEET "~ASS textbook • tw o ste reo co de • • #I' ~ •• $22. safer de vice if you insist on measurements arou nd high -voltage circuits! Once you have this dipper built and calibrated. ..95 6 tapes for speed b ull d ln 9 from 13 t o 22 wpm for the Ext ra code exam .. an d 6 cod e tapes (13 to 22 wpm) . 925 Sherwood Dr.95 4 t apes and 1 Illust rate d te x t bo ok • #10 COMPLETE EXTRA...95 4 theory tapes. 1 textboo k.... IPPlng & handling IL re. Parts List 01 C1 C2.95 #15 PLASTIC KEY & OSC .. ".95 " . ' C 1 available from Radiokit.. 4 theory ta pes. a nd ove r $50 • I n rad io d isc o u n t co u pons .. i r z -oe ae I I . • • - _ SINGLE CODE TAPES $10 .CF2 FB M1 B11 SW 1 2N441 6 transistor 1.GORDON WEST RADIO SCHOOL I • 8 ATTE~Y #iJ4 21 ·0AY NOVICE I I I l I I I I I I I I • I• I I I I I I I• I ~ r.. components: Length of RG-1 74fU mini-coax. Battery dip (a) and bottom view showing pan s placement (b). and Cl has a slightly sma ller sha ft. it ca n be taken and used anywhere. My unit holds its cal ibration exceedingly wel l. $62..5. #05 COMPLETE GENERAL.'00.17 wpm Speed Builder 17 · 1'0 wp m Speed Builder 20 wpm Random C o de 20 wpm T est Prepa ration 2 0 wpm Car Code 3 . 2 textboo ks..95 each in clU ding shlppin9 # '9 # 20 #21 #22 # 23 # 24 #2 5 # 26 #27 # 28 #29 #30 # 31 # 32 # 33 # 34 # 43 #40 5 wpm Novice QSO t est s 5 wp m Ra nd om COde 5· 7 wpm Speed Builder 7·10 wpm Speed Builder 10 wpm Plat eau B re aker 10·12 w pm Speed Builder 12 ·15 wpm ceus & N u m ber s 13 wpm Random Code 13 wpm Test Prepar ation 13 wpm Ca r Code 13 -15 wp m Speed Builder 15 .95 o CRySTAL SOC KET BATTERY GROUN D 1_llUGJ -0- 1 EOTTO'" PLATE ' '' "EAOEO "'OU" "_G MOLES 14 PLACES I . most accurate 432 dipper I have seen. Since most commerci al o r home-brew shaft couplers are l.8. IL 60044 Mon. $22. No othe r adj ustment exists o r is needed. code oscill ator • . This is the handiest. P. Figure 3.O.0 00 CLIP lea rni n g tapes sample 5 w p m Novice code le st o ve r $50 In ra di o manufactu re rs ' discount coupons . At a ny rate . I first used heat-s hr ink tu bi ng . Short length of 1114 bare copper wire. you will find it inval uable as a timesaver when making any SOil of400 -500 MHz tank circuits... ~ . • #iJ2 NOVICE COOE COURSE $32. a nd then scrounged a round for an appropriate size of Teflon tubing to go over it.4" in dia mcter . • #ill COMPLETE NOVICE .. Below a nd left of the tuning knob is a small hole th rough which the coax is passed to the ex ternal meter.. Battery drain is on ly a few mi ls.OTTO" PLATE '5 CU A.::. You will be in the ball park if yo u match my constr uctio n.. you can use a small piece of brass shim stock 10 mute the capaci tor shaft to the IA" cou pler.. an d 2 • textbooks. THEORY COURSE $32. II " I I I I I I I • I I I •I I I II. The ra nge is shifted by lengthening o r shortening Ll .' Cl '. . CODE COURSE . • on • '" This Genera l cou rse Inc l u des 6 tapes for speed bu ildi ng fro m 5 to 13 _ wpm ..95 - 4 theory ta pes and 1 I ll ustrat ed textbook fo r E x t ra c l ass theory . 1991 " o " "f. Since the wavcmctcr pos mon is used in " hot" circuits. _ #08B COMPLETE ADVANCED $62. it sho uld be ca librated with reasonable acc uracy initially .0 ". snap-on 9 volt batte ry cl ips (with wires) from Rad io Shack .lden" add 6 lf>.8·4pm (708) 234-6600 CIRCLE 3 1 ON READER SERVICE CoIlRO 22 73 Amateur Radio Today .1 • ~ t . ~. I used RG -1 74 fU because it is limp a nd docs not fight yo u as yo u move the dipper arou nd. FT-243 style XTAl socket.. #11 EXTRA CODE COURSE $32. Lake Bluff. it allows me to zip painlessly throu gh my 432 projects.. Chassis lor meter. .95 #13 BRASS KEY & OSC. WAln f Ofl DVR22 JRC OIJO TES NRD-525. i1 Oelen se.I PORTABlE ICOM A·2O KING KX.M. _ ' .~ Wlreles. REGENCY. Morse Coach Proln ' ion.. MOO!J Bl Ox. INO-"F" Traon-Bwy Sl ation" Bus: Broadway ~ 10 Sprong St. TM-331A..2OO8I7008 ICOM IC2J3I4SAT l 1C02. FT·4700RH . .. cs roo TUNERS STOCKED: MARINE RADIOS ICON MS. 1 Sold. T IuItwiojJ ANT. RF Cooonpts . Slocked & se rvi ced .. SONY DEALER EI MAC 3·500Z 512B. Slandard . Melville NY A.S.. 440 MHz). 2·way..lOR: AR.-- - New TEN.". 735 . ().l300MHz 22 10 H. ICOM. YAESU ' I'THr00en006 UN'DE N.. IC·901.e . Motorola . ('n lor~ ­ "'mill('ur RilO'O COu'se •. TS· 79 0A . rONNA. I COO. Simple To use. elC. Data Engine. 27SA/H . bUSInesses. Gov't.wide ' ange. 78 1. STOCKEO KPC IV. • OPTO KEYERS STOCKED Radi o. Porla ble s.. R-SOOO...2OH T. MAXON .IN' UlS '_z. Statoon" .. 'HA" l'I(PlAnRS STOCNEO.-.c. M800 AMPUFIERS STOCKED.ngl IRT/LE X· " Spn nv St.•••••• ".anscelve.. e. se FAX: 212-925-7001 CIRCll 4 1 OfrIIIU Oll'l S l llYlCl C t. . . Stat io n" .nA. H. _ """" y I :. SWL. FT·747GX..nlroni<:s SHORTWAVE RECEIVERS KAM . . Path·9th SI . ALL SA LES FINAL Technical help offered upon purch... TM-941A IC·R 7 1A . Air Disk. AVIATIOtlICOM .. Ci. U400 MAXON . M56. BA LUNS.mple> AUlopatch SOI·50 Will Patch FM T. CQf. TH27/47A . JST135 G & G elECTRONICS AAT1 . IC· 76S. R·7000.M"'ley Urban . CQl. • Monday·Fri d ay 9 t o 6:30 PM Thurs. DuplexB200. 2600H ..gg I.--' ~ . AE S. M100 TS440S/AT. to 8 PM Come to Barry'S l or the best bu ys i n t own. 6J S6C 12BY7A & 6146B Alphl Dell.s on st OCk BENCHER PADDLES . LOW PASS FILTE RS Telephone 1or• • POrt IN W a tt m e te r s &~. 229 H.TEC PARAGON OMNI v Jl\' !-t~ 11)( T~ Anlennas. FT·470 KENWOOD ?CO M NYE MBV·A 3 Kilowatt Tuner AVIATlQf.17UmelM Panasonic ShOl'lWave Radios/Marine •• ••• K. COMMERCI AL R AOIO S STOCKED. Hable Eapanol" BARRY IN TERN A TIO N A L TEL EX 12·7670 MERCHAN DISE TAKE N ON CONSIGNMENT FOR TOP PRICES MOnda v· F" d av 9 A M 10 6 '30 P .I . .n.o.. _ lin lCOM uie. Kenwood Service Repair.lGH. 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TS-650S..lorage TE SI'Sl_ 1C-32.-S. b a se s . TS-711f81 1A."~. ee u lor greet prlcesl .__ Prod UCl S Slochd AEA lsopoles (144 .RINEICOM MS.~ Elements In Steck 'b . IC72S.. UTC·XlOO Long.. TM·2550A. FT 212/71 2RH.. FT·10000. IC-2400A/2500A ---- FT·767GX. TS l 40S .TE .. 475AJH . liy-G..1S. 1. . l or Bu siness. Butlf ' '". KPC II.:. hal'ld held scan""". (). Saturday & Sunday 10 to 5 P.. .. Thu' soa v 10 8 P M Sal u'da v & Sunoay . Sub w.TAD .~~..Il.For the best buys in town call: 212·925·7000 Los Precios Mas Bajos en Nueva Yortt WE SHIP WORLDWIDE! - KI TTY SAYS: WE ARE NOWOPEN 7 OA YSA WEE K. TS68 0S .811. V'OO.. 3220A. RZ·1 .. KING . e · peaters .1. :'E C ~ S I ONV Safety belts-in stock See you February 171hlIMARC. TS950SD. CES S.. TM·731A. lsoloop. To Yo".' . Yaesu We Serve munlC'· pallties. FRG·8800. Box 973. If light coupli ng is used. componenls: Project box (RS# 270-232). ' ~ / 10 ' <. Wiri ng associated direc tly wit h the tank ci rcuit should emulate good VHF construction practices . LL I-v ' ~''"' . Response is excellent at the design freq uency .F o'"' AI had o ne! I be lieve you will e njoy its hel p as much as I do . r ~6BO. you will find yourself bei ng reass ured that LO output really is on 404 MHz.HRI. and extremely poor to no nexistent for nearby frequencies . The UHFfield strength meter." . "'-==+. a nd photos show all that is needed to build this device . by Martin Beck WBI1lESV T his field strength meter willcover4OO to 500 MHz. OE ~ EO PC . The amplifier employs one transistor. 0 "ETER 0 '50. Wichita Photo A.1741U m ini coax. February.. with a potentiometer to vary its ga in. In a field strength me ter (FS M) o ne should not expect freque ncy meter accuracy.4 Photo B..102)' 500 pF disc ceramic capacitor 680 pF disc ceramic capacitor 7" #24 enameled wire 3. two-terminal standoff.to 2-foot length of RG.¥" .. 199 1 S~HT @" =(0~ " @ .- ~ ~ 410 n '--- • 0.50~.eco O~ Martin Beck WB0ESV.[ u Figure 1.2 3'~ • 00 Figure 2. . SOI.5. I chose the tan k components from several trial units . drawings..F ~SO.~ POT ~ ~ I ~~/S' COOOER "'RE O ~ " SS . I have included a sim ple DC amplifier to drive the mete r . Th e schematic.1 " 1 ~ ·F nr I N91 . This FSM and its mate .. ' C1 available from Radiokit. ". Internal view ofthe meter. the off frequency rejection is even better .Number 6 on yo ur Feed beck cerd UHF Field Strength Meter For 400 to 500 MHz. use very sho rt or nea r zero lead lengths. W wide hobby brass strip 1/64 " thiek(see Figure 1) #14 bare copper wire (see Figure 1) 10k potentiometer 470 ohm resistor.wn <@. l' ) liZ" ! r1" KS67203. L $ ""'~~'"' ~ . . The coupling is accomplished through a 1. 2N3906 or any small signal PNP transistor 1N91 4 diode 1.. I " never really needed" a good 400-500 MHz FSM until I " " ce I .). III O -"OO~ A '~ " "" s. small brass sheet. wall 0-200 IlA (or 0-50 IlA) meter 5 P5T switch 9 volt battery r"~ ". . a very sharp upward kick of the meter occurs . can easily exceed what is generally necessary . Since we often deal with very weak 400500 MHz e nergy . " ETER ~ " 01 D1 C1 C2 C3.. 1637 Hood.=J 31S' " 'OE SR"SS * Misc. with a phono plug on one side a nd a small wire loop on the othe r.0 pF variable capacitor (Cardwell #160.. P. For those who have no facilities for close calibration.. Field strength meter schematic. Parts layout for the field strength rII{'fer.16" diameter close-wound wnn 'II " leads.C4 RFC1 L1 L2 R1 R2 M1 51 BT1 ". I calibrated my unit with my dip meter a nd a digital frequency counter of known accuracy . @ . 11.~ \ L 1 / /' ~ 4 "~ . the little 400-500 MHz dippe r in this issue wil l do a good enough job for all but the most stringent situations.' J U ~E TQ S. 24 73 Amateur Radio Today . NH 03076. 'no • lG ~~ . Phone: (603) 635-2235. . but this one . with care in construction a nd calibratio n.O.. I .5. with the result that when tuni ng across a n RF source wit hin the design ra nge . Parts List ~5~l1P o. Pelham. the UHF source di pper (also in this issue) form a powerful pair that belongs on every VHF workbe nch.n~~Y '''0'0 'H"C< PLASTIC SO. Once your unit is completed and calibrat ed. 'j Wt bl..ll ICS' A_.---RM SERIES IAmpsl Size IINI "xW x0 Shipping Wt IIbl .7 2 77 ASTRON POWER SUPPLIES • HEAVY DUTY..I 5 7. ott) "'..n. (lh. Gray • • • • "'"•• • • Cntin. sx u xu e x 13lio x 11 13 20 29 5'4 x 19 x 12'h 5'4 x 19 x 12'ft 38 46 50 • Built in speaker RS-S SERIES MODEl RS-lS RS-'OS RS-. CA 927 18 (71 4 ) 458.x6'hx9 3". )( 19)( 12'h 7)( 19)( 12'h 10 4 5 7 7 • SwiW. lA_.. (~ Dltly Cycle Smin.ti.5 amps 10 FtJllload • ICS' (A_'ll @13. . - • Ell ! . RS-5A. 12 12 RS-12M • Separate volt and Amp meters RS-20M RS-35M RS-50M MODEL VS·35M Siz_U NI H)(W )(D 5'10)( 19 )( 8'10 5'/.o x 5"0 31.. CORPORATION 9 Autry Irvine. CHASSIS MOUNT FUSE • THREE CONDUCTOR POWER COAl) excepllor RS-3A • (WE YEAR WARRANTY .5 9 9 ICS' (A_' ll 3 6 Size liN] Kx Wx l 3 x 4:r. on 5 min. input voltage (except lor SL-l1AI • HEAVY DUTY HEAT SINK ..4L llS-5l • INPUT VOLTAGE: 105-125 VAC • OUTPUT VOLTAGE: 13.lIS-.A. Current limit adjustable from 1.) 4 5 7 • • Separate Volt and Amp Meters.."'" • • • • • • • • • • • • • • • • • 35 50 55 12 35 50 55 5'I. .8VOC @10VDC @5VDC 9 5 2 4 16 9 25 15 7 37 22 10 MODEl YS-12M YS-2OM YS-35M YS-SOM • Variable rack mount power supplies VR M·35M 25 VR M-5UM 37 20 35 50 7 10 15 22 35 50 Size lIN) I xW xl ni"i'l Wt·llh·1 ewx e x s 5 x9 x l 01'. RUGGED.. REliABLE. 1 1 ~1.. x 611I x 7'" 3'10 x 6'h x 9 4 x 7'1> x 10% 4 x 7'h x 10% • MODEl ICS' IAlllpl) 12 Sh i p~ i n ~ Wt l bl. lA_.5 9 7 10 16 20 12 SlzellNI I xW xD 4 x 71k x 10.. SPECIAL FEATURES PERFORMANCE SPECIFICATIONS • SOLID STATE ELECTRONICALlV REGULATED • FOLD-BACK CURRENT LIMITING Protects Power Supply from excesstve current & ceeumoue snortec output • CflOWBAR OVER VOLTAGE PROTECTION on all Models mtlll RS-3A.1 hl' IA_.. RS-L SERIES r. HIGH QUALITY. MADE IN U.05 verts (Internally Adjustable: 11-15 VOe) • RIPPLE Less than 5mv peak to peak (lull load & low line) • MAINTAIN REGULATION & lOW RIPPlE al low line input Voltage • All units available in 220 VM.(.I) @13.l l ICS' IA_.~ 0 ~.habIe volt and Amp metEf VS-M AND VRM-M SERIES 7 10 11 13 13 18 27 46 2. 1 10 12 13 18 CIRCLE 18 ON RUOER SERVICE CAItO . MODEL VS·50M SL SE Colon Grl' Black MODEL Conlinul)US Duly lAmps) • l O W P ROF IL E POWER SUPPLY SL·11A 7 • • . Outplll Voltage adjustablelrom 2-15 Vl)lts . Ilh ..1'1 WI." Osl. 5'/0 )( 19)( 12 'h 5'/0 )( 19)( 12'h 7 )( 19)( 12'h 16 38 16 38 50 60 50 60 4 x 7'l! x l 0% 16 25 37 20 35 50 sx u xu 6 x13'1ox11 C•• II.1 9 12 4'h x8x9 13 16 25 37 20 35 50 5x9x10'h sx u xu 6 x 13'10 x 11 18 27 46 -wxaxa s x s x rew n i"I'1 WI... )( 19 x 8'I.ASTRON lit:.8V 12 Cutl. x r« x 9% 11 I&S· Size [I N) Continu ous K ~ W~ D MODEL Duty IAmpsl [Ampsl • POWER SUPPLIES WITH BUILT IN C IGARETTE LIG HTER RECEPTACLE RS-4L 4 3 3'11 x 6'10 x 7'/0 RS·5L 4 5 3'h x 6'1a x 7'1.I) Size (III Ix Wxl n l"i'l WI.. )( 19)( 12 'h 5'/.. IAm p11 AM -12A 9 AM -35A 25 AM -SOA 37 AM-BOA 50 • Separate Volt and Amp Meters RM -12M 9 RM-35M 25 RM·5I)M 37 RM·60M 50 C." 4"" X 8 x 9 5 x 9 x 10"" 1'1. U ." 4x7"" x 10"...2S RS-20S "1CS-lnlermittlfll Communication Service Sh. 6n.' &. III.8 vee :!: 0.. .] MODEl RS-3A RS-4A RS-5A RS-7A RS-7B RS-l0A RS-12A RS-12B RS-lOA MODEL RS-7A RS-M SERIES RS-35A RS-50A .S.5 3 4 5 5 7. • 19" RACK MOUNT POWER SUPPLIES Conlinuolll MODEL DUI. lA_. III. ICS · I MODEL RM-35M RS-A SERIES .) 11 23/. .t order a programm.AI.OR.n MRS100 a computer mtertace program is available tor 5 19 . Origln.oad l.I.95 n C. M ichig an 4 8 106 USA Ad d 5 12. ~ Chann..1_ CEt oa . 189 95 RD8XL·A3 U". 806·956 IiJHZ.... ''ll'''''' ""CO""". 1)I'IOne 1 / 09 95 111495 8C5SXlT·A S..95 's deSIgned to program . PA. LA MS.95 BCOO3·A $w"Ch a ssem~y fm BC5901160Xl T . NV." n.dln . $canne' O"lIICIory .S 5 /SPEC IAL 48 Chann.r.0 . t. .95 RD25-A uni". 10 band ._ . Am erican Express Of Ma ste rCard. sue s w ll4'12' ll 12'1> . GoIIa". You g et a UC102 handhe ld transceiver on 154..dM 40 ch.. 5 159 95 ATS800-A Sang. pack lor BC200/eCl OOX L1. 74 102·.ccePled!rom approved goY •• "m.ndheld Tr..1 SSB CB Bas• .rged fOt...S.••• PI'Ione 569 95 CT7856-A U_ _ . batt ery cha rg ef a nd batte ry pack l o r only S7995.. S72.54.9 5 w itho ul even opening t he tra nactever... .. . Order your sca nner now.' COl'd ..Ifol. W e recommend also ordering the BC45 rapid charge 1".r.t 200X l T sets a ne w sl and ard l o r hanGheld scanners In pe rf or ma nce and dependabi lity. F.. WV . MY.. You c an scan 20 channelsa t upto40channels per second. e you emerg ency communications al a reasonable poce..mmed wit h a personal computer. AElM t ransceivers may be qui ckl y program mad fo r up to 48 freq uencies. A similar 16 channel. . ' 0 ba"d ac. ndbooIYAM/fM/Fr" Dand S14.o n" CB base S92 95 FeE·A f'e<l""""'Y OI." voaor mount <aOe' delector ..nd CEllogos .ny unique l8<ltu. 95 BCS/IO XLT·A Su ". Mles t.. ".n 40 CIl.a" ehortwa.amm. AC adapte r and earpho ne . yo ur radio tecn mcta n can rep rogram t his rad io in minutes w it h the PM1 OOA prog ramme r l or S9 9 .O..ereli": 2/1. A. ' ""l a"".. busy-channellockout.. KY. ' . All fad ios come w ith CTCSS to ne and scanning capabiliti es.I'''~ ''lI C B w.. The SPM2 lor 549 95 III lor the LMV2 56 and l MUl 56 transee'vers.. . eceivea 40 channels in two ban kS sce ne 15 c hannels pe r secon d."'Il your own radIOsySlem.. .ng commun...I.n . band and 100 channels. S99.. . we're he re and ready t o help. band when progr.000 M Hz.. Snap on eenenes give yOU plenty of power AddI tional teat ure s such as lime-out tim er.da'delector..00 addol_.''''''. The RF p ower contror featu re in tile RC i29 50 ailow s yOU to adjust the RF o utpu t pow er cont inuously from 1 wa tl th roug h a l ull 25 watt s o utput o n USB..ORIE. .ble .. Vnid"n CBrad.20 Chann~. ambulance. " you a' e the d. $23 9 ..tory . NEWI Ranger" RC12950·A l ist price S5 49.6-..'o.an shertwau• •ece.. essentia l emergen cy supp lie s c an be r ushed t o yo u by GEl. 1 / bendac a"n..r wil h CB . ..lly designed 'or inl . n ''''denl' pieasa add 4. . continUOUS co . The radio l echn lCian maint aining yourradiosystemcan store up 10 161raquencies Wl lhQUt an e llt ernal prog ra mm ing tool.599.. m ike g ain. u". wo._ ~~.tocal ion H ... Plu. NEWI RELM ' RH256NB·A list price S4 49 . 566. carrying case wII" bell loop.. shipping charge s are two l i me s contInent al U. Pf'l sc.95 is lor lhe RMU45 6 transee...nl/u" ll-hortwa • • flllC.95 A/IO-A Mal/net mounl mobil. Freq uency selections may be made I ro m a sw it ch on th e m ic roph one or the I ro nl pan el.. ord er l he Be 100XLT-r\3 l or only S179. $7B."ac..SS /SP ECI A L 110. List ed below. El ectron ic .. . " purc"aso Ofllete . /t fLGA. . ue tectcrs Irom CEI today CARD-A3 U".00/ C E price S3 19. Scanner 0 181nblJtlon Cen te. Includes antenna. a" ' e". 11 .0000 M Hz..95.S Govt f'e<l S18 95 514.... 33/ C E p rice S7S . 1I)'Of. "'.. ...m0rt Po.r 10 Cll. a simila r mod el call ed Ihe BC 21 OXLT'A i.duced performanc• .l.er.. .. T. MO.. 122..(len MRS 100 surveillance scanner is dlfl el enl Irom all other $COln. . is a lso av ailable lor $ 489. fre quenc ..A.'.ansee. To he lp.A3 40 Ch.nnel SS B CB mobile.os are so reliable they have a two year lim'led warranty. "~ n .95... Mldull. The RM P1 lor 549 .. " " ete<l doffo•• ".IHZ The Bearc. . ME.... HOIN••• no''''ng . emergenc:y _. 406 ·51 2._ S5.cann. Alaska.celn.1CB MoM e 576. CEI .134.s..re. for o ve r tw enty two years. l 0 band ac.rs muSf be used .9 5 .ll also '3 4' 748 MH z. It yOU w an t e ven more pow er. .95/SPECIAL '2-Band. ABO Watt VH F 15(). .95 Add54 00 sf11PPinl1 lor all..nneISSeC Bmobil e . 40 Chennal • No-crt. ... rat es. 11.. NI-( Rl VT DIrectory S1 495 RF03·A DE.95 RD3XL· A3 UniIHn 3 band . Th e RC l29 50 gives y ou AM .n cred. NJ..raga W..95 BC330A·A 8. ee. PA mode.l h VH F_ all\er $1995 78300. Prog... . . OUf REL M two... 5 152. arcstl 00 eh. You ge t a noi se b lan ker. toat. MN.95/SPECIAl ... .00 . With a n e xl ern al programme r... or radIO techniocian ma.ng COlselor BC55XLT. Sl'upm. Clo!a._ ..nt agenc:.. For credI t card o rd e r.toc~ ".95 PR051 0lC L.ssy I Eel" " "" l/e Communicll'on•. TXf'e<l O_ectory 51 495 ASOoA A.95 EEC·A Emn. No COO"s. 11/1.. . All llflCeIar. .. 5113. backlit LCD display and more.. .C . .n" ce mob'" w. .. When you need to talk to police . . S9495 BCI72XL·A Bu .lh. D ia l 8()(. . " .lur".11 I.. : ' : •••• 0- •• • • ~ .way eaoto t ransce t. The PM 100 A lor 599 9 5 18df!os1gnedto e. The Uniden 800 Xl T. KS.I". ."!'1Ou1 nol'c.C. Sale " . 125• .ada..: 748·114 MH z. Hawa ii.95 PROS3BW·A Un. lire decle"menlS and puDlie salely use. . lector. PrICes. NV. or sta te....u. For tec hn ica l tnto. Band Rad IO teansce... The PCKlT01 Ol or 5 149 ....ndbOO~ .ls.95 BC1 · A Burcat Info. federal and international response forces. 549. vefSionca-. . of tile Unid.95 PCl 22·A3 Uni~n 40 eh. .1 CB Mobile 534. lIobll.~'pping per " "'0 and sa 00 per ..S. 51599 5 8CI42XL·A S••rc. r.. f ire." .. Frtlquency rang. Bearcat" 800XLT·A List pric e $54 9 .·. VA..n U..95 ATS803A· A S.. Pon ' ~'I M oDile CB .fll C"lulJOn lind only by Qu~.95 BCS S5XLT· A Su rcar 50 Ch . RepNt.'z.. 60 watt concenec t he AM V60B is available 'or S48 9 ..nac.•••Handh.. .I. The RELM FlSP500 B-A is our mOSI popular pr~ g rammable 5 wa tt.y. .. l ee 12/15/90 .. M.. For inlormalion call3 13--996-8888.d.lllanc.~.. 11 band aca""e' " 1134 95 BC5llOlCLT·A 8uTcar l00eh. Due to manufactu.loe<1 per$OrIneI becCl lJs..9 5 / C E pric e 5486. NEW! Uniden" MR8100·A Lis t pr ice $84 9 . 11 band ac. ~e<pI>onecoodle.. plU9"in prog ramming and IB M PC compatabihty are standa rd. NEWI RELM @LMV2548B·A uet price S4 23 . NEWI RELM' RSP500-A list price S4 6 5 . Of llUPl>!y your t.nla". Th IS tranecewe r even has a priority l unct ion.IQf'y S1 495 RfD7 ·A CO..95 ROllGTL·A Uniden" Paaaport". II ordars to: Communica lions Electronic5~ Boll 10 4 5 . The Un.ty. $ 174 95 U"'". A low band version call ed the AM l 60 A lor 30..car 20 Ch. or APOI FPO delivery. 16 Channel Similar vereson 01 this redro called the LM U1SB.il h a rnan.I/FO Full Band Co"..w."a • AIt"lIoda Op.mOle mount ce . wI 17' C. call t OIHree in the U. 573. SInce this ra d io is programmed Wll h an ell lernal programmef.COMMUNICATIONS ELECTRONICS INC.n on lol89flon.95 is needed lor programming t he L M U15B. • Dlglt. 116· I 14.te the m.95 AT a-A Bae. lSB or C W o peration..5700 MH~. ... "andwill be e".IH" "micro' . NEWI RELM' UC1 02/UC202 l ist price $ 128.. An ext ernal p rogra mm ing unu SPM2 10 r S49.. 20 channel handheld t ransceiver.114. CtRCU 12 1 ON RUDER SlRVICE CARO ~ AELM L MV254a B Only S 289 .. .arcal I...e mlerlerence an(l rlJpflOn 10 operal..ar. type accepted l or data transmission and D..95..l Intel1lge"ce by James E..Won.r .""..Ir(fJ. IO.95.Cor.. ni-cad batt ery pack.. 5 14 95 RR f .ca llQflS systems (I. " . 40ll·5t 2. ()fo( W1f~Oo.. PR0310 E·A3 U"ornnolOCh. rog er beep...11 be r>la<:e<l on beCkO<de••ulomallCl1ly Ot eQu. orde r t he Fl EL M UC202 tw o wall tre nsce-ve r l or only S1 1495...----------------------------1 •• ....95 Pee6A·A Un.re trademarks 01 Comm unications Elect.. . 1045 0 AAn Art><><. Till. 199 95 184 95 M510 3·A s. BUY WITH CONFIDENCE MiCh. OK.<pian.A R..t..ange ZQ·5 '. so. A U HF 15 w al t.e and . 5 We" • H.lIe COlb!e tor BC55XLT 51 4 95 VCOO 1·A Carry.amm"'9 can cau. $199.. . . are some of o ur most asked about tra nsceivers.. 53995 7 7 1 1.95/ C E prl ce5239 .. .W. IA."nor . Sell"".eel''''.".25 Wert Tr. but most departments are stra pped ' or renee.A is also available an-cl covers 4 50-4 8 2 M Hz.nl product . 1. RMV60 B.n e ftonl.S.. . .'ed to. "..oon . UT. .c.... '0 Progr.r 20 chan_.. Ann Arbor.nn..O . .n c all 313-996-8888 or FAll 31 3·683-8888 . .r>and'M lor.162 M Hz. II yOU w anl a ve ry sim il af model withoul l he 800 MH ~ ... band. approved. h du<1es '238175-'4510125 .. weather CB Mob.."".95 .25 W.. .ca""e' .9 5 and a n e ll ternal spea ker mic rophone WIt h chp SM4S l o r S59 9 5 . Ce H. .. .9S/S PEC tA L 'III Clterwtel • . VI 51 4 95 RfPl5-A AK..' VH F anI. Inc .95 PROS20XL·A3 40 cha nnel CB Mob... 53995 ATS808·A Sanl/. 584.. Becau se o f our g rowth.. 95 . Alphanum enc designation of chann .. MIC " 'Ilan 48 1(HH045 US A Fo r ord. .95 8CI47XLT· A S.mmebl.I .nnela per second.QuI oI..maloon ...95 nc-A TochntQUMlorl". aTcat 16 eh. It includes CTCSS tone and dogllal coded squelch . 40/1 ' 512.. 194 95 BP205-A N.. wi 12' c .95 ~:J ~ 1 . R. the M R8100 II not aua.S. call Aang er at 6 19-259-02 87. $I 07.1 • .. Imost 100 Ch. C EI cn oeretanus t hat all ag encies wa nl excere nt com mun ic ations c apa bil ity.malion seann.n Ann Ntlor... c a ll GEl at 3 13'9 96-8888. digi tal VFO .43.nle"".. .lmOSI all REl M radIOS Dv Inl e«::Qnn<H. or t he A Ml80B lor 37-50. 134.1 rec.onics me.0l1C8100n. nno.t a l ()Oo..v. OTHER RADIOS AND ACCES.00 par radio lor U. RML6QA. NM. MD.. S1 495 RF01 ·A Ml IL IN..ld g ••r you c.lIJanllCB lX"'!ablew.. ale. O rder tcoav. $1 29...33 / C E price $2BS . Not . a deluxe leat her case LC45 lo rS48 . groun(l shipping and handling in t he continent al U.d the AH8068 is evauabre lor S429. $133. FAX anyti me_ dial 3 13-6 63·8888. hour deSk ballery Charger lo r S9 9 . A $5.c._r Ban(ls: 29·54.tern US A.tuled ..nl..rt T.· ... number Wrin.nd moat _II r. .r • Prlonty fimrouf 11m..95 PR0535E·A 40 ch..l ."".a t 16 eh.95 PR0330 E·A3 U"".ers were especially created to r qovemment agencies. ellllion ecanne. l ernally Ilfogram t1-..11 Cogsr.. .A "' '' ~ Ole mou" t VH F ant. NE.. to 29. . FM. cloning..'.9 5 . ers " designed to g .l " VHF ... 95 PR064OE' A3 uni""" 40 CIl.. 119a 95 BC780X LT·A a..n. As always.95 GRANT·A3 Un.9S/S PECl A L . • cceplal'l<... 514 95 8C70 lLT·A a.n''''.nls . incorrect pr09.. you mu. 6999 MHz The Ranger RC t2950 M obile 10 MeIer Tra nsc eiver has eve ryth ing you need for amate ur radio com' munic alions...nnel CB Mobile. This l ull i eat ure d umt has 200 programmable channels WIth 10 scannIng ban kS and 12 band cove ra ge.174.N OfIH. 806-9 12 MHl...9 5/ C E prl c .""'r55O.. . P.. SD.r'pllfa RIT. .7M 40 ch..···1 RELM' Programming Tools ..11 I.t u. Ind epec. 56295 719 13·AI...." If.l reve e Discove r..1d "'rch • Umll • Hold • ~_tfy • Loclr_ Frequencr . • Priority RELM's new LM V2 548 B g ives yOU up to 4 8 channels wh ic h can be o rg anized in to 4 se parate scan areas l or conveni enl grouping 01ch ann e ls an d improved comm unica tions etticta ncy.e flllC.ve.95 TSG-G1 -TOll5ecrer RfIlI<sl ryol U.alll>ocal arTora.tlon s. U".8.ers· te mtorial res/nctions."II.nll'lSa 9"5-89 ' 0125 I..an Shortwav.. AI.. orde'ed alll>a aam.. Tunnall. l or only S339. CEI now offe rs a special packag e deal on I he Fl EL M UC102 one w atl t ransce ive r. .os ... WA. 51 4.514 95 RFDe--A CA.95 USAK. WY Ole S14 95 Rfl)l$·A AL .S5/ C E pri c e S24 9 .e lor ' ".labililY.000 MH~.".9 5/ C E prIc a S299.bjed 10 ava. " ... b e sure to also order one PM45 a t S7 4.ltd. 116.~n 40C I'l. yOU may call and p lace a crechlcard order. For Canada.COlIIa.OR.. br. Emergency Operations Center has expanded t o o u r new two acre f aci lity and World Headquarters. If.e .C..."lI 1001to act'vale vanous I. fleXible an tenna.95 L1N· A llte.nne.A Tun..dar detlllCtor .• • •r. S.95 BCOO2 'A CTCSSlone boa.~i"llCommunlCll!_ .clrlnllqllldcryataldiapl. .....ng.USA·SCAN.c.an. S121. For additional a s si stan ce.. .. GEl is now your one stop source for emerg en cy response eq uipment.. '00 Ch_eI • •lIrv.&.llng l)e lween • MS/ OOS PC and Ihe radio.I"..g. U SB....t.. . scan""..laDie lor (llrect shipmenl 'rom CEI to C".oe·llf 11 "HIf ""rod.95/SPECI AL ' 0 lI..nn.S.. 5""" surcharg e l o r billing to Ame rica n Expre ss.. LS B and CW modes.eclory lor E... $. IIlI$ sca... bu ilt·i n SlRF/MOD/SW R meter. ... • ...nac. a"cr>a'Q""orBC55 llLT ."11'" For more information call 1-313-996-8888 Communications Electronics Inc. 114 95 SM H·A 5<:a"" '" Mod.rm. . *** Uniden CB Radios *** The Umoen~ ee of Citl~"n...~. d. $1 4 95 FBW-A FleQU-efICIl' Dweclory lor W. Ne. Co. VIsa.." Ult.a ktllrough of new and enhanced le.1 • •00 IIIf• .." II you do not need the 800 MHz. $13495 BC177XLT·A SeSTcat 16 eh.95 l o r yo ur radio system .equ" rIC)' directory . $34 95 USAMM·A Ma9 mou.. . NO. To act.nnar PrIority con'rol • '. .th VHF .A 8'Il CB H.a.. You l)et lou r dogit readout pasl lhe decimal pOInt COmplete coverage of 800 MHz. It is F. Eme rgency Operations Center PO 90... 10 or UT...4 95 RFD2 ·A CT. OC. f 18...re ' ad• • deteclor .95 7T118-A I.urc~arlle 10 ' nell0 Di'.OO.. 114. AMLBO S and LMV2548 rad IOS.. t". . 5 159. 12bandac.. 12 ba"d acanne " . . . M .. : "CB :.t 10 CI\Innel acan_r AD1 ClO-A Plug ..$.(Hor BC59011110 XLT"" 15." Un. aua ilable ror $1 789 5.ms ..llC8llO'" a'e eublecl to c"'no.... l C385-A un. 5124..6130/9 1 AD _0 1059 1·A C OpyrlS ht Cl 1991 Comm unlcetlon. sse ce mobile .l'''''' Add 512...95... Hl GU f'eq O. When you have a comrnendcontroror com mu mca tions need.Scan &Pe8'd is . Cad ban. 80/1·95/1 M Hz.erclt/'cen • AC/DC Ban ds : 29.. * * * Uniden Radar Detecfot's* * * Buy l he " nesl Ufl'den reda. separate speaker.."'" S39. Puerto RICo.le . oilers. 1/ 495 P$O(l l . NV. ligence agenel&s. 95 PR0&10E·A 40 ch.. • Ott Hook PrlorIfJ C hannel The RELM RH256 N B is the updaled versoon a the popular RE lM R H256B si llteen-channel VHF land mobile transceiver. Searcat" 200XLT-A list poce S509. Niles IL . the second being basically the inverse of the first.) Since the first Schmitt trigger inverts the incoming wavefor m as a by-product of its operation. This shiel ding includes pUlling the IC into a metal bo x. ve rticals . This capabili ty can provide anothe r feature for our circuit. e ither a valid err signal or an output f rom the 14538 must be present to keep a transm itte r toggled on The duty cycle of the 14538 can be calculated by T = RC (T in seconds.C~"". Fully warranted for one year. The circuit is cente red around the MC14093 (CD 4093) integrated circuit. retnqqerabte mode) gels triggered on the rising edge of th e PTT'S re lease. This IC is used primarily as a Schmitt trigger. "'" (2 1$) '><><8 ' 032 ""t8 "" Co. we have also surpassed the capabi iities of some of the lower-priced modern ge nerators . or permits bypass ing nmer. .'" ".8 10 30 MHz) with up to 1500 watts RF power to alm ost any anten na.) Klaus Spies WB9 YBM. 00 FOB Factory. '.. M" D. If you expect that the '93 will have to drive severance at one li me. whe n p roperly e nclosed in its own bo x. so there is no problem using a spare gate as an inverter Schmitt triggers are used to "square up" noisy squa re-wave signals.~ • FULL COVERAGE · 1. MODEL VS-300A ANTENNA TUNER GUARANTEED THE BEST VALUE YOU'll EVER FINDI $111." . C in farads).00 SHI'P1NG " Kl\HJUNG $(.[ " "" "". or the duty cycle of the output square wave will be affected. we have no w nol on iy broughf old {nondigilal) signal generato rs up to modern capability levels. 00 &k:': . high volt age. 01 euowe ee Figure I . with the input signals not to exceed the su pply voltage (rega rdless which supply vo ltage you decide to use). can have two output jacks.) Reminder: It is always good e ngineering pract ice to t ie the inpuls of unused g ates 10 an appropriate (high or low) logic level. a switch can be loggled to provide 12 volt levels when wo rking on CMOS ICs or other 12 volt Circuits {like those found in many mobile radios) ... exce pt possibly a 100 ohm resis tor between the output of the '93 and the "outside wo rld " This will pro tect the IC fro m overcurrent should Ihe output inadve rtently be connected to a 0' ". and has one m ajor advantage. Because many of them are still using signal generators that do not have digital output capability. B'''''' PA 10001 7 a a _ $~ 1 CIRCLE S3 01'1 READER SERVICE CA RD 73 Amateur Radio Today ."" . as per Fig ure tc (The pinout of the 14001 is identical to the pinout o f the 14071.. remember that all po wer leads should be suita bly filtered to ensure pure DC. often keep olde r equipment instead of buying newer this. including dipoles.u Com> ~. 00>.TS Great Ideas From Our Readers Ending Transmit Chatter Transmit "chatter" can be quite annoying on both repealers and links. o r if for some other reason you expect a higher load. Depending on the type Of circuitry in your trans mitter. "..'. Figure 2.tter ' ro m transmit mode.. Febru ary. • In-circuit wattmeter fof continuous m onitoring. Niles IL 0' """. little else is required on the outputs of the 4093. Another consideration is a housing for the IC. and GROUNDING THE BO X TO THE POWER SUP· PLY GROUND.): 11 " wide x 13" d eep x 6" high Weight: 6 ' /2 100 .. in ve rted veee. 1991 27 .. this circuit. "". . this may be unacceptable. .. can accept up to 18 volts fo r supply . Note that the input (sine) wave must be symmetrical. R in ohms. being on a limited budget. Let's consider IC o utput. If this is the case. The 14538 monostable mullivibrato r (here wired in leading-edge trigger. one 'or each signal polarity. ra ndom wi res and ot he rs. • Vefnier tl. .OfiOO~ A' ""'" O<o~ . ~ J. With this circu it.-. They should also be byp assed to get rid of any high. trans mitter o r tra nsceiver In Ihe 160 10 10 meter range (1. A 1 :4 balu n is b uilt-in for con nectio n to balanced lines . Dimmsion (Approx.8 . There are four Schmill trigger NA ND ga tes ava ilable. (See Figure ta.". The following circu it provides these two outputs.do n'l le ave it floating l The 14093.) When re le asing the transrn. balanced lines o r a single wire . Or. .30 MHz • HANDLES UP TO 300 WATIS • MATCHES VIRTUAlLY AlL ANTENNAS DIPOL E BEAM RANDOM WlRE INVERTED VEE VERTICAL MOBILE WHIP • ACCEPTS COM BALANCED UNE OR SING LE WIRE FEEDUNE • BUILT-IN ANTE NNA SWITCH • BUtLT-IN WATTMETER WITH FORWARD AND REFLECTED POWER FOR SWR MEASUREMENTS • WATTMETER ACTIVE EVEN WITH TUNER IN BYPASS POSITION • ATIRAC TIVE Ct-WlCOAl GRAY FINISH AT HOM E IN AN'( HAM SHACK • RUGGED 4:1 BALUN FOR BAlANCED FEEDLINE . (This might be desirable in some exper iments." P<>C«JClS '" URJnJ:R WlLLLUl80N a """'~. mobile whips. or you m ay wish to usa a transisto r bulle r to protect you r IC. and (for all of those doing work wit h radios) to bypass any RF fro m gelling into the circuitry . or be shorted to ground . W hiie a single IC can be mounted on almost anything (no cr itical or special circu it board is required ).. (See Figure lb. weak signals barely breaking a receiver's squelch can cause an annoying popping. beams. Klaus Spies WB9 YBM. the Schmitt trigger is in the for m of a NA ND gate. i:EY A.. .Jning for easy adjustment Front panel sw itching ra pid selection of antennas. . equipmen t with mo re capa bil ity. . I recommend substituting a 14001 fo r a 14071. or the circuit will drop out. MODEL VS1SOOA A NTENN A COUPLER b) . Her e's a simple cure for that problem.. but for basic circu its Ihis should not be a major concern. ""'. Most modern waveform generators prov ide two d igital signals.connection lor greater hasmonic attenuation."'<0 '00" [ . While most modern waveform generators provide only one outpu t jack. • " The Barker & Wi lliamson VS 1500A antenna c oupler is designed 10 match v irtually any receiver. I strongly recommend that you use a 2N2222A tran sistor as a bu ffer/drive r.-' ~ '0"" 00'''''' . " " . For horne-brewed lin ks and simpler repeaters that don'. or to an external durrrny load.. as the link 's (or repeater's) t ransmitter keeps toggling on and of f. Through the 4071..---_cJ:P ~ Ilt"'." umers. Most repeaters have a certain "hang lime" whe re the transmitter slays keyed up alter the input signal is lost. during which l ime the signal will either return . A simple switch can toggle in a 5 volt supply to the IC when a 5 volt maximum output is requ ired while experimen ting witn TTL components. 0"'"'' Price: $499. fed by c o ax cable. and to take sine waves and convert them to square waves over the ir hysteresis curve. the output of the 4071 is pos itive. Modifying a sinewave osc illator to give the digital output used in today's modern technology is much easier than most people may thin k. have these tail- " Adding Digital Output t o a Signal Generator Many experimenters.frequency noise caused by such th ings as a high generator frequency.. FEAT\JRES INCWDE: • Ser ies parallel cepactto. (In th is particular IC.. and have no DC offset voltage. For driving a typical ctrcun built by an experimen ter . This generates a one-second pulse.Number 25 on your Fe-edback card C... another invert f unction must be provided to ha ve the output signal (labeled "square-wave out put") come out at the same phase as the input signal. .) Remember to tie all unused inputs of a gate to the proper logic leval. be ing a C MOS IC.RCU. but even then I found the display a bit on the dark side . As in most HTs. MEOIUM. and the transmit audio is what we've come to expect from Kenwood.. with no sharp edges. e r choice. The manual states that you 'll get about 15 hours Photo. Corporation The Kenwood TH·27A A mini HT with maxi features. The power button must be depressed for 0 . All buttons (except power and lamp) control multiple functions . I have always found it downright aggravating to have to hunt for switches or buttons on the back of an HT. You can attach it any way you choose. as every manufacturer will now want to include all Ihe available features in Iheir products. which will stay lit for five seconds after the last key operation. Once you understand the procedures. I do mean complele! There are 26 separate symbols that inform you of every possible setting. although the button is recessed somewhat from the rest of the case. er set on low. provides about two hours of life at high power (1 m inute KmiUJ minute receive ratio) . with more and more features. this seems like something that was designed into the unit for the sake of being different. it wouldn't take much for the radio to be turned on by accident. " po . The battery pack slides neatly and solidly into the bottom of the un il's case. II took some time to get used to. and DC jacks. andECONOIoIIC LOW gives 20 mW . but it means that there is a definite trent and back 10 the antenna . Nor is it inside. . and . You can have constant illumination by first pressing the funclion key. you should see nearly four hours of operation. Th is means that there is nothing on the back except the belt P . Box 22745 2201 E. there are four round buttons wh ich control various functiorls.. Kenwood's audio is more evenly balanced and I' ve always found it easier to listen to. even play w ith itt Needless 10 say .S. I th ink we have finally reached the saturation point. the battery pack does not hang off the bottom of the unit. In add ition to the standard ts-ecrtcn keypad . squelch and tuning knobs. All other functions .. The Kenwood TH·27A-afl curves and full teetures. You won 't damage anything by simply experimentinq with the different buttons. The plastic wi~ dow lies "ush with the radio housing. In fact. This is a trend that I hope continues in HT design . but once I became comtortabie with the system I found it very convenient. This little radio feels very sol id in your hand. but the sequences are not readily apparent. . whether you're a lefty or a righty.. The thin and flexible rubber ducky antenna has a covering thai comes over the BNC connector and sits flush with the radio housing.. LOW power provides Yl wall. Long Beach CA 90801-5745 Tel. I can't think of any reason why the standard volume control switch wouldn 't be preferable. "Where's the battery?" Unlike most HTs.. There's no CAM to cut through.• Number 7 on your Feedback c. The battery.. I fear Ihat this will become the norm. 1991 of ballery life if you leave the power on ECONOMIC LOW.. ens with a 'tz-vctt source and 2. Some people prefer transmit aud io that boosts the high end. clip. The only thing that saved me from finding a dead battery was the automatic power-ott feature . This happened to me when I packed the TH-27A in my suitcase the night before a trip... For the past several years HTs have been getting more and more complicated . Speaking of power.O. I got my first gl impse of Kenwood 's latest entry into the micrc-Hr arena test september at the Southwest Convention in San Diego. In fact. Firs t Impressions The first thing you ask yoursell upon seeing this little rig is.. mi crophone. . Th is adds 10 the physical beauty of the radio but does nothing to protect the window from scratches. Still awaiting FCC type acceptance. This blanks the frequency display and allows you to directly enter a frequency with the numeric keypad . the rig was loaded with a d ead battery by the careful Kenwood reps.A. are on the trout of the rig. The HIGH sett ing will g ive y ou 5 . this is FM. The top of the rad io holds the volume. which turns the radio off after one hour of inactivity. Price Class: $420.5 watts with the 7. We couldn '. instead of the usual " Highf La . where it disappears from view.d 73 Review by David Cassidy N1GPH Kenwood U . as opposed 10 the standard volume control knob. especially if you're like me and always keep your HT in a protective case.. and if you 're in a noisy environment you're going to have 10 use an earphone (or hold the radio to your ear) anyway. feeling that it increases the communications quality.. as well as the speaker. but this is one radio that forces you to refer to the manual.. Dominguez $1. (213) 639-4200.3 seconds for the unit to be activated. The LCD display shows a complete picture of your operating parameters . 28 73AmaleurRadio Today . The TH-27A is unique in that MEMORY mode is always ava ilable at the push of a single button. and ECONOIoIIC LOW. including the LCD display.. To access the VFO. If you leave the po. t suppose that woutd be enough juice to get around a fairground or short parade route. they're no more difficult than any other modern HT. A push of the button will light the display .2 volt 700 mAh type. After all. or repeat the proce- . With the TH-27A. II is obvious that Kenwood has put a lot of thought and design time into the ergonomics of this rig . you press the ENTer key . Frequency Management Most HTs are placed into either VFO or MEM· QAYmode by the push of a button . The speaker audio is surpriSingly good for a radio of this size. as well as the power and lamp buttons. like the internal battery in ICOM's mini IC-2SAT. You may now tune the VFO with the tuning knob. Every corner and angle is rounded. the display must be read from below or straight on. The unit is lurned on by a fronl panel button. The entire rad io is shaped in a very slight " V" angle which fits the curve of your palm and makes the PTT switch fall right under your finger . a standard 7 . February. but it is obvious that the antenna and rad io were designed to lOOk good a certain way . This is the first HT that I actually had to read the instruction manual for before operating it. This adds much to the sleek appearance of the unit.2volt battery . but I find it tiresome to listen to for any length of time. Two green LEOs provide illumination. the TH27A offers four choices: HIGH . I have 10 say . LOW. it is slightly convex .. MEDIUM power provides 2 walls. this was a tantalizing first look at what has finally come to market as the Kenwood TH-27A. Alas.. 65... 2875 IC·2KL HF solid state amp w/ps.00 529 l \ UX·39A 251'1 220MHz umt (Spieill) 349... battery with IC·3SAT puchase..003191\ Rp·1220 L2GHz lOw repealer 259900 2249 SP-3 Erte mar speaker.00 1999 PS-30 Systems pi s w/ cord.00 1099 1699.00 869'\ I Multi-band FM Transceiver Regular Sale IC·901 2m/ 440 Fiber opt xcvr($puill) 1199. 38900 349 l \ UX-19A Iuw 10m unit.oeno xcvr/6m .. ($. 59.... Top Trades! • We'll take your Clean Late ModeJ gear in trade towards New ICOM Equipment. ..00 699 ~\ 999. 349.Q Regular SALE 409.2GHz HTlbatl/cgllTTP 529. 31 49..00 499 9\ IC-735 HF xcvrlSW rcw/mic 1149.. 1199.00 1129 1399.. 64. .. 25.00 79991 AH·32 2m/440 Dual Band mobile ant 39. tuner 589..00 EX·3ID Vo.. .'"'..... If you have aQuestion.00 549'\ 629...00 569'\ 69900 599 ~\ 899..00 4699 \ Aircraft band handhelds Regu lar SALE A·2 5W PEP synth....00 929'\ UX-R9IA Broad band receiver unit. 38900 349.....99 EX-310 Voice synthesizer 59. (CllfflIlIt) Dual-band FM Transceivers IC-3220A 251'1 2m/440 FMITTP mic... IC·75 IA 9-band xcvr/ .00 5995 Rp· 151D 2m 251'1 repeater 184900 1649 £X·627 HF au to. ant...Qs 6995.2V@ 300ma.. .00 VHF/UHF Mobile Transceivers IC-229A 251'1 2m FMITTP mic.) 625. ..00 4199 \ 599.00 3891\ IC-970A 251'1 2m/430 MHz transceiver 2895....00 499'\ limifed OU. TTP IC·32AT 2m/44Q HT IC-24AT . 9-5:30. 49..50 UT-30 Tone encoder 18 50 Mobile Antenna Regu lar Sale IC-725 HF xcvrl SW rcv r ($"mQ 949.00 SP-7 Small external speaker 51. ref. Mon th ru Fn.00 319'\ UX·S92A 2m SSB/CWmodule 599... g-pm plug 349. 33 Yea" in Am""...00 UX-R96 50·905 Mhz receive un it ....00 1699 Repeaters Regular Sale IC-4KL Hf 1KWout si s amp 'ld.. .. xtaf 751A...2GHz unit 549..... . 0" ''' " IC·12GAT 11'1 1. 139..o ICOM HF Equipment Reg ular SALE IC-765 xcvrI ps/keyerI auto tuner. ($plcill) IC-2SAT 2mIT P(Spit) IC·3SAT 220 HTITTP IC·4SAT 440 HTITTP IC-2GAT 2m HTITI P IC-4GAT 440MHz..00 11 99 1399.00 799'\ RC·ll Inlrared remole controller 7099 FL-32A 500 Hz CW fi lter.. aircraft HT w/ VOR (Spie... etc 79.. (Sptti'Q $999..! .00 389~\ 479......00 SP·3 External speaker 65........00 2899\ 439 00 319'\ 44900369'\ 449 00369'\ 42900 379'\ 44900 369'\ 629.. ...00 11 99 1599..helds IC-02ATlHigh Power IC-04AT440 (Cloffllllt) IC-2SA 2m .... 35.. .003299\ 419. ... ..00 AH·3 Auto matic ant tuner .dio HOURS.00 2699 Fl·32A 500 Hz CWfiller. 1699 00 1399 21900 199 ~\ 5900 11 5.... selecto r (Spuif/) 315..... 70.. 175..00 1269 1399..e Accessories for IC·76517811725 _ Call for Prices CREDIT CARD .....00 1039 Larsen PO-TlM Irunklip moun!.00 499'\ For HT Accessories _ CALL lor Prices cecewers Regular SALE R-7lA 100kHz-30MHz rcvr..00 1 09~\ 11 5. Prices subject to change without notice. two cables. 545900 4699 Due to the size of the ICOM prod uct line. .00 SM-6 Desk microphone 47..8 kHz wide SSB!ilter. onl y ($pWlI) 55900 469'\ U.....00 1469 Hano.00 159'\ EX-2 57 FMunil... 69 00 FL-63A 250 Hz CWtdte r (1st IFl .00 499 ' \ Regular Sale 659. ... (SpleitQ IC-2500A 35w 440/1.... Sat 9-3 .. some accessoryitems are not listed.00 CR-64 High stabll i t ~ oscillator xtal 79.. please call.99 MB· 12 Mobile moun!..00 1399 PS-15 20A external power supply.. ...... 69.00 CK-70 (EX·299) 12VDC option 12... 75800 6 89~\ 90U1 AH-2A Ant tune r system. scan 89..00 379' \ Larsen PO-K Roof mounl. 2300 IC·726 Iu.. aircraft HT 52500 47991 A·2D Synth.00 TV-R7000 ATVunit..J VHF/UHF Base Transceivers IC-275A 251'1 2m FMlSSB/CW w/ps IC-275H 1001'1 2m FM/SSB/CW IC-475A 251'1440 FM/SSB/CWw/ps IC·475H WOw 440 FMlSSB/CW ($pIe) IC·575A 251'1 6/l0m xc vr/ps ($pieiif) IC-575H 251'11001'1 6/l0m XCVI Regular SALE 1299..l·30 MHz rc vr PS-35 internal power supply H -63A 250 Hz CW fi lter (Ist If)...99 CR-64 High stab..2GHz FM Reg ular Sale 449. .00 1599 \ Rp·4020 440MHz 251'1 repeater 2299.ce s ~ nt h es l zer......00 12911 R-90oe 100KHz-2GHl all·mode rcvr ..00 1 09~\ 59.mI) 1299.00 1029 RC· 12 Infrared remote contrener..00 AT-500 500W 9-band auto. (S~ 489.95 SM·8 Desk rmc .. (SpIci. Wnfe or Call for our Quote Today! AES@* 0"...002691\ RP-221 0 220MHz 251'1 repeater 1649.00 1 99~\ VHF/UHF Mobile Transceivers Regular Sale AT-I50 Automatic antenna tu ner 445. R.00 2499 IC-970H 451'1 2m/430 MHz transceiver3149...00 9699 \ PS·55 External power supply 219. .10 Accessories Regular SALE Larsen PO·MM Magnetic mou n!.00 3499\ 449. IC-3220H 45w 2m/35w 440 FMITTP IC-2400A 2m/440 FMITTP.. IC-229H 501'1 2mFMITTP mic IC·448A 25w 440 FMITTP .00 269 l \ UX-59A tuw 6m uou. 5900 FL-44A SSB filter (2nd IF) 178. 1999..00 519'\ AH-2 8-band tuner w/ mount & wh ip.. 299..00 279 9 \ UX· 129A lOw 1.. . 24...00 2699 ** Large Stocks Fast Service * Top Trades at A ES' c..====-----.. .99 R-700D 25MHz·2GHz recei ver.j £X·243 Electronic keyer unil. H-52A 500 Hz CW fi lter (2nd IF) Fl-S3A 250 Hz CWfi lter (2nd IF) H-70 2.. . FREE BP-82external 7.. ant...00 AH B-32 Trunk-lip moun!. I would strongly suggest tak ing this mini for a test drive. into memory. accessible by a touch of the CALL button . Final Comments I really think Kenwood has a winner in the TH-27A. touching the 5 key will immediately transler you back to the VFO. For the next few days I would still try to enter a freq uency without first hitting that ENTer key . Thanks for the Memories There are 40 memory channels and three ways to access them-single number. Again. In twonumber entry. Some of the things I really like are: Overall design. There's also a « 0 MHz version (the TH-47A) for those who need it. and those of other individuals or groups. but coul dn't it have been designed without the front and back sides different? Manual. Just set the time of your local VHF net. The TH-27A has a plug for direct 12-volt input . This would be handy if any of your frie nds don't have subaudible tones. immediately accessing the appropriate memory channel. The manual for the TH-27A is full of those grammatical errors tha t at best make lor comical readi ng. The standard volume contro l switc h wou ld ha ve eliminat ed th is problem. Call up your repeater's phone patch. a few of the highlights inctude: Tone SquefchlCTCSS. This is similar to the tone squelch. When used as a tone squelch . you may set a " power on" and "power olf" time in conj unction with the 24-hour clock. even alter several hours. The immediate entry also lend s ilself to public service work . I simply leave the locat repeaters in memory ch annels 1. you can set the prionty function to immediately switch to the priority frequency . In addition to the regular " power olf" feature (the transceiver shuts down alter 59 minutes of inactivity). There is atso an independent call channel memory. but I bet every TH-27A we ever see will have scratches across the display window . Hitting a numeric key without first hitti ng ENTer will immediately choose the memory channel of that number. Kenwood 's manuals are generally pretty good. You can also set it to shut itselloff. This feature would be very handy lor public service or emergency operation. Thi s allows you to silently momtor a frequency. once you are in memory." The rubberized knobs and button s feel very secure. Up to 10 telephone nurnbers of up to 15 digi ts eac h may be stored in memory. where net control was on a local repeater but on-sight and other communications were on another repeater or simplex frequency. Memory channel 1 also serves as the priority channel. When traveling.which scans over the entire bane. I hope they'll consider rewriting it . One-way antenna. This is very convenient for monitoring a busy repeater or a simplex frequency at a hamfest. Scanning Around The TH -27A has seven scanning options and three scanning modes . This feature keeps your squelch on until the proper threedigit code is heard. A quick read of the appropriate page in the manual made everything clear. I enter the new freq uencies into the higher memory channels and switch to two-number control. the radiO will sound a tone to let you know when there is activity on that Irequency. The PIT switch on the TH-27A is easy to operate. but I think most would opt for the alert tone only. PTT switch. For example. This is as solid a radio as you' re goi ng to find. and the 7. Kenwood ought to submit it to the Metropolitan Museum. it looks great. and at worst make for conrusiOn and frustration . so I don't know what happened with this one.S. Nothing in this workl is pe rfect .two user-programmable scanning ranges. Included features. Call/Memory SCan-alternate scanni ng 01 the CAll ch annel and the last used memory channel. Overall quality. if you are currently in memory ch an nel 5 . The subaudible tone encoder is also standard . The TH-27A is a beautiful radio . all memory ch annels may be accessed by the number keys. A lot of the solid feel has to do with the unique batte ry arrangement. the tuning control will change the memory channels. The ballery slips up into the tran sceiver with a nice solid "clic k. You may write to him % 73. Con. Upon returning home. but in ti me I bec ame comfortable with the procedure. III David Cassidy N1GPH is the Associate Publisher of 73 Amateur RadiO Today. it allows you to store your own paging code. as ment ioned earlie r. Subaudibte tones are programmable and may be used in t ransmit (to access repeaters) andlor in rece ive. The tones are played through the HT's speaker whi le being broadcast. Features. VFOfMemory SCan-alternate scanning 01 the VFO and the last used memory channel. Although there is not enough room in a short review to discuss them all (the ma nual is a full 5 1 pages). Programmable (PROG-I . I hope the days of paying extra for this feature are over. If YOU're currently shopping for a new HT. SEEK scan will stop on a busy channel. Power settings. and vcu'n start to appreciate a smooth and light PIT switch . I found this way of managing memories very convenient . Try spending a day wrestling with the PTT switch on the TH·25. No need to remember what memory channel holds the secondary Irequency. but I like to hear the tones (myoid Kenwood TH-25 doesn't do this. It looks great. or tuning knob. it' s back to one-number access unlillhe next trip. mostly because I was trying to stick to my " never read a manual first " philosophy. The manual doesn't do a very good job at explai ning this rather complicated system. except that it's activated by regular tones instead of subaudible tones. CARRIER sca n will stop on a busy channel. push a button. there are three sca nning mod es.• cure (first hitting the ENTer key) to directly en ter another frequency. The scan ning options are: 30 73AmateurRadio Today . You and you r friends decide on a tone to use an d you won't have to listen to everyone else's communications. Paging . PROG-2) Band scan. TIME scan stops on a busy chan nel lor five seconds. The TH-27A may be set to display a 24 hour clock. II you choose. The choice of fou r power settings allows for maximum battery life. then resumes scanning even if a signal is still present. and your TH-27A will turn itself on at that time. ClOCk. The high quality is evident as soon as you hold it in your hand . or carry on your be lt all day. Non-recessed LCD display. Timer. 1 an d 2. but resume scanning two seconds after the carrier drops. Many hams like to keep their home repeater or local simplex calli ng freq uency in this position. and you're all set.9 and set the access to single number. but a0 must be entered before channels 1-9. Simply put it into the VFO and you can switch instantly between the two. II may be totally psychological . and Canada. Channels 11 -40 can then be accessed by turning the tuning knob. Since I travel around the country quit e a bit . MHz SCan-scans over a 1 MHz range. unt il one of the group pages you. The tone encoder is sta ndard equipment on all TH-27A' s sold in the U. CallNFO Sca n-alterna te scanning of the VFO and the CAll. This procedure confused me at first. There is a " Dual Tone Multi Freque ncy" paging system. February. With single number entry. In addition to all this. Memory SCan-scans through all memory channels that have cata stored in them and that have not been locked out. You may think thi s is really picking nits. but many of Kenwood ' s previou s HTs had PTT switches that were hard 10 pUSh. you can immediately access memory channels 1-9 by touching the app ropria te number key . Pros mue This rig has a lot going for it. and it has always bUgged me). your HT remains silent unless the correct tone is present. channel. 1991 Band Scan.2 volt 700 mAh standard banery is nice to have in such a small HT . With the priority alert function on. . You may also retu rn to the VFO lrom memory by simply hitti ng the numeri c key for the memory channel you are currently in. or you can simply hit another numeric key to access a different memory channel. It's about time these two features became standard on all HTs. Features and More Features The TH-27A has the full boat of features we've come to expect in our HTs. The small size makes it easy to pack away for trips. two number. Some of the things that bugged me about this radio are: Power switch-iI's too easy to turn the rad io on or off by acci dent. DTMF Memory. the explanation of which takes up six pages in the manual! Basically. Dual Tone Squelch System. .: 16011323-" 2 11 • FAX: 160 1! 323-6551 ~· r . U's so powerful t ha t a m ere 6 5 walls d rive gives yo u fu ll legal output . ..brings you the ATR. 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It ha nd les full legal power wt th ease... It has the du rability of glass tubes and the power dissipation of ceramic tubes . you WOII' . Bu t do n ' t make that mistake if yo u have a pair of 3CXBOOA7s . For you r bes t prtcc. a l"Nl Dr-a l. Catalog Of" ~ . -. Peak reading SWRJwattmeler. Ameritron s uper power ampltfh-r us es the he rc u le a n 8877 ceram ic tube..and It's just loanng because the po w er supply is ca pab le of 2500 walls PEP. .1500 warts . 6 00 watts for only S549! 5 x lOx II Inch powerhouse g ives 600 watts PE p ..8·30 MHz.. _ A MIIIU" ••M.unless yo u' re ready to buy another pair. 3CX 12 00A 7: 12 time s tougher than the 3CX800A7 A 3CX1200A7 has a 50 walt control ~rld drestpano n th a t's more than 12 ti mes tougher tha n the deltr-a te 4 watts grId dissipa tio n of a 3CXHOOA 7. 5 1. SLIOQeSle(I flet. 10.. 1. Full lega l power at b alf the p rice A sf ng le 3CX 12ooA7 In the AL ·12oo a t • I ..4 x 13 'Ao x 13'1. Legal limit antenna tuner -- Eve n a t 5204 5 list it's a bargain ...1539759 S a le. When you see a local TV broadcast station do a remote from a site where action is taking place.. missiles. . When high definition television (HDTV) becomes a reality you will fi nd that a system called Multiple Analog Components (MAC) may be used. Some examples of the use of FM TV are fouod in commercial and military fields. since spectrum space was not available on the 70cm band.. '00' )1 . A glaring exampIe is the continuous use of the NTSC method of sending color on ATV. Amateurs experiment and develop new modes and equipment that later show up in commercial use. The Bird wattmeter may read higher when ovc rd nving the amplifier . They all use FM for their video transmission. If amplitude modulation had been cons idered. . aea~G . The waveform becomes asymmetrical with the sync signal in one direction (maximum power) and the video signal in the opposite direction .' %'00' o I.. where it is so hard to maintain high power and still have a good waveform. I feel that amateur radio has existed over the last fifty years only because of its tcchnical contribut ions. Gone is the need for line samplers used to adjust sync. and equipment discards from commercial usage made it pas' sible to have a lot of fu n. but il docs not.. (Modified from a arcun from the Janua ry 89 issue of VHF Communications . but a line sampler in the antenna lead will show that the sync pul se has been greatly reduced in height. the problems would have been even worse. no 100" n·"f":'~ '~~ "" . In amplitude modulation. '" . required to have linear amplifiers .. "' '" 2tonOa r-. '" '0 .l5J.'" Foo' . They also give Third World countries an opportunity to have a free source of electronic and communication technicians that these countries would not be able 10 afford otherwise./. l 991 fier can be operated at maximum power for as long as the transistors can survive. In an amplitude sys· tern. m 1'00' 1'~' '00 1'00' . c ~ .. " . white and blanking levels after the signal has passed through the stages of amplification. This is a distinct advantage at UHF. The lack of ava ilable equipment became a problem.6 ." _th a ' of ±. February.: \ '00'1 1"·'''''' r ~... '00' ." %". Miller W9NTP would you like 10 forget problems of sync clipping and nonlinea r powerlimited amplifiers? Amateur television enthu siasts today have the opportunity to free themselves from many of the problems that have plagued them for the last thirty years. These antennas are directed toward satellites that broadcast high quality commercial TV. FIgure J. The British I'''£ ·( ''_A$ I~ 000' '~ 'Ot O '" -.oo. If you examine modern methods of sending color you will find thai almost any other method is better. 'O~~ cc " -_." . by Don C. Semiconductors are notorious for their nonlinearity so the possibility of ope rating thcm in Class C mode became the first real advantage of FM ATV in getting some power on the air. S' SO&O Pl. . The video signal may be improved by 20 10 30dB over the convennonatIy transmitted AM television signal. . . Why not try it on ATV? How do you get started in FM A TV? First.. '" . Only the American hams have missed it . " . it wasn't until activity on the 1200 MHz band became popular that it really started to grow in Europe.. Of'! your FeedMdt card Future Modulation Amateur Television Sometimes called frequency modulation.- ' e~o . Amateurs reading this article may wonder how they could have missed these great improvements in ATV transmission. r ". Pan of the line is the color signal and the other pan is luminance. like amplitude modulated television. Slow scanners have been using this method of sending color for 10 years.. Z~ . the amplitude of the transmitted signal is constant." DUfU A T(JIIfOlo • • ~.n~· ' W .!c. . Single sideband would be more efficient if it were not. p. L.. BasIC CIrcuit used to produce FM·A7V on l 3cm. Hams recognized the adva ntages early on but..'OEO e... The truth is that amateurs in general did not miss the advantages of frequency modulation (FM) ATV. . The am pli- H OW 32 73 Amaleur Radio Today . In case the reader docs not understand the difference between linear amplifiers running at near half power and class C amplifiers running at fu ll power .!c OOO ' :j~ 'I~"'" 'S OU' PUU.L '" -aov 'oc. 000 Ia G[ . since the sync pulse is modulated in an FM mode .. . This leads one to believe that there must be something superior for the FM mode over the AM mode. With FM ATV . when nonlinear amplifiers are used the sync signals may be compressed by operating the amplifie rs with too much average power output. Costs were a factor. I have found thai FM ATV is used exclusively by European and otber foreign ATV enthusiasts. I have always been critical of ATV in America because hams chose to use techniqucs and circuits that were designed in 1940. By traveling around the world visiting ATV hams. " Sa Oa l)< 010 f II '" 8"". FM ATV affords an opportunity to experiment and build equipment to test out new bands for propagation and other unknown results. o r black and white signal. This is a system where a single line of TV is divided into two or three parts. advance the state of the art. To-day we see satellite dishes in backyards . they use FM TV. fO U EO O.. the modulating waveform is asymmetrical. you should read the literature..Numbet". consider the following.( " . The video signal is a wide bandwidth signal which is combined with a vertical and horizontal sync signal. This is the reason that the FM repeaters on two meters and other VHF/ UHF bands use voice FM. The peak power always refers to the power of the sync. The military use FM TV on all of their television guided. . Concepls Astron Butternut Lan. Mif/er W9!'ffP at Wyman Resea rch . 1991 33 . publishes circuits and sells kits for building your own system (kits are avail able for all circuits ). we ha ve bee n talk ing about Future Modulation (FM) not Ancient Mod ulation (A M). Satellite receivers are designed for larger bandwidths and deviation than is used on amateur FM ATV . The most popular one that has been produced hundreds of times around the world is called the "Solem.] A word about FM ATV recei vers: Those of you who are flea market buyers may want to try discarded satellite receive rs . . se nd me a gree n stamp for a copy . Wyman Research developed a new unit which has proven to be superior in design to the origi nal Wood Douglas exciter. AM A TV transmission over a lossy path. Note thai I've said nothing about using a TV set in an FM ATV system. F. Phone: (3 17) 525. Included in the c ircuitry is a preemphasis circuit. A second magazi ne called VHF Communications from Germany . standard to all FM ATV . Caution is in orde r. 1-800·426-2891 METRO: (612) 786-4475 2663 County Rd. primed in English. . however. See address at end of the articie. Bencher Plu. Their modules are very well made and are crystal-locked so that you don 'I have 10 chase the signal around the band. RecentIy il has bee n updated by locking it to a crystal oscillator.6452. and the level of the video is much less than normal because of the lack o f full discriminato r detection . Considering the fact that no expensive test equipment is required to build the gear or align it makes it a ve ry good mode from an economic viewpoint. The result is that there is increased noise in thc received signal because of the added noise in the unu sed pas sband.s the result of using FM modulation over the same path. most of the complicated circuitry has becn eliminated . Since good circuitry for FM ATV is hard 10 o btain a t low COSI. Cd . MN 55112 Super Minnesota Watts 1-800-279-1503 CIRCLE 153 ON RU Ofll S ERVICE CAR() 73 Amateur Radio Today . After all . I refer you to VHF Communications .. A real e xpe rimenter should be ab le to decrease the bandwidth and add a stage o f video ga in to make [hem usablc. which increases the deviation at high video frequencies . Waldron IN 46182. for you r supPOrt. Thi s is later compe nsated for by using deemphasis at the receiver 10 restore the proper level s (see Figure I ) . February. iii Subscrip tions to the BATC as welt as a line of FM All' equipment a re available from Don C. Those of you who have trouble building AM video transmitters should have no trouble building FM video tra nsmitters.. divides it by 256 and locks it to a crystal in the 4 MH z range. Thc circuit is extremely easy to get going and is the basis of most of the FM ATV systems around the world . Cd. Top phoro is that ofa / wan /255 MHz. c . Amateur Television Club magazine is a wealth of information both for circu its and eq uipment kits . Don' t judge the results of FM ATV by using a satell ite recei ver. . The loo p is adj usted by varying the voltage on a va racror d iode to bring the free-running oscillator into range . Cd. Comparison of AM & FM A7V. Wood Douglas makes transm itter mod ules (10 milliwatts output) and 1200 MHz dcwnconverters which conve rt 10 their IF FM ATV board. If you insist. If you are unable to find thi s issue. N Oll' the increased p icture quality. A receiver de signed specifically for FM ATV will do remarkably bener. I wou ld enjoy recei ving comments in regard 10 FM ATV. The amateur only needs to connect the ou tput to a computer monitor and he is ready 10 receive video and audio. more . I Mounds View.Photos A & B. DAN KBeX(. " The Worthington group of fhe BATe still sells th is kit . The bottom p hoto sho. "'" • • •• C all $ C all S GallS C. Box 95 RR I. After all. Note : A PC board or kit is available f or this transmitter.-KIRBY KAllT5-lOU IS KAtlPN RON NIKMR-OENISE VL-MAUNE XYL-MIKE SIIN 1-800-426-2891 :--l CaliS CaliS Call S C . The cost per watt for FM ATV is now lower than AM ATV .. "'" R. {Ed. video and audio subcarrie rs ca n be added to the loop control voltage to vary the frequency to produce FM ATV which is locked to the carrier frequen cy . W ith the British pound increasi ng even more and the desire of Wood Douglas to di scominue the ir amateur rad io line.en Husller Lakeview AARl AEA Kantronlcs SOny MFM Cushcrah Vlbroplel . With FM ATV. signal drift is not serious because of the nature of detection and bandwidth . If you are interested in a very good theoret ical article o n the comparison between AM and FM ATV . March. Once the loop is locked to the crystal. and at a much lower price . giving output video and aud io. Some of the highest quality FM ATV units bui ll today come fro m a British company called Wood Dou glas . • Thank. an ordinary TV set can detect an FM ATV signal poorly by using the principle of slope detection . A British company called Plessey has developed a chip that is unique to the semiconductor world . many of rhe first circu its were fre e-runn ing oscil lato rs tha t were varied in frequency by a varactor diode modulator. . 1986. This chip is phase-lockedlooped and has a divider chain that inputs a 1200 MHz signal at a rather low level. As e xciting as that idea was. However. we broadened its a ppeal by combining it with a family vacation. Some hams re nt Caribbean vacation retreats that are completely equipped with ham radio stations . lilies some 150 34 73 Amaleur Radio rcaev » Fe brua ry. and most of . It' s also d ry . the y woul d tend to be well -occupied a nd thu s less rare .. Its long .'OS borrowed from an Anguilla ham. plus avoid serious sunbu rns? As the y say o n Anguilla . Anguilla wa s especially interest ing to me. is the northernmost of the British Leeward Isla nds. The 35square-mil e cou ntry is flat . 1991 Phoro A. Martin . For several weeks we collected infonnation . rack up 4. I learned. Anguilla is rathe r plain.273 QSOs in five days. serpe ntine sha pe was noted by Columbus. I ra n across VP2EHF on 20 meters one day a nd q uickly plunged into a detailed disc ussion with Da ve about An guilla . being pursued by the multitudes and worki ng the pileups. with the Caribbean a favorite area . There were several attractive possibilit ies. we felt that since these were widely advert ised . and the Turks a nd Caiccs.. •• BI IB Selecting the Location Each of us agreed to research o ne or two possibl e spots. Mon! " by "Dee" Logan VP2 E/WI HEO C an th ree Ohio couples combine a vacation and OXpedition to the West Indies. There are no strea ms.perhaps s ill. was in a warm vacation spot served by commercial airlines. Virgin Islands. just seven miles from St . who sailed by in 1493 a nd du bbed it Anguilla.represented country on the air and thu s a good cand idate. ask someo ne who lives the re . we reassembled to make ou r selection. and the tribander . the Italia n word for eel. the Bahamas. Photo B. This was good ne ws. Anguilla. Our short list included Mo ntserrat. First . " No problem . a nd had affordable lod ging that allowed ham radio operat ions. mon! " The idea for ou r OXpedition to Anguilla o riginated with seve ral members of the Lak e County (Ohio) Amateur Radio Association .Number 9 on your FeflIbltck c. Thl' VP2EOH DXpeditjOfl 's main operating location-:a seaside villa on Anguilla . If you want good infonnation on a OX cou ntry . rivers or waterfalls. A small island . n' s only 16 miles lo ng and three miles wide . It sou nded to me like a somewha t under. The rowerf or VP2EOH . what was our c rite ria? We decid ed o n a somewhat ra re OX cou ntry that had reciprocal licen sing with the Un ited States . . Note the 15100' tower and tribander on thl' roof Th e flat roofmade amenna installation easy.'OS donated to the island 's Boy Scouts afterwards. rising only 213 feet above sea level. After completing our individ ual researc h.1ll Take A West Indies DXpedition? "No Problem. miles east of Puerto Rico. Anguilla. Our casual talk turned serious when several cl ub members and their spouses began ITICCting over potluck dinners to plan the real th ing . All shared the fantasy of someday finding themselves in a ra re OX location . He said that there really weren't ma ny hams o n his isla nd. Unlike so me Ca ribbean islands that o ffer e xotic sce nery such as mou ntains or rain forests . 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We began by checking 10 meters . Our prime requirement was a hotel or villa that welcomed hams . The towe r was a problem. with a fe w shops and ma rkets scattered he re a nd there . collected $38 U . and we fou nd some neal villas available then on the south side of the island at Sea Feathe rs Bay . Box OX . 20 23 21 24 K8Bl. We all ag reed that to assure a good s ignal we'd ru n a yagi. but opted not to ope rate on 75 meters. (We donated the beam to the Anguilla Boy Scouts after our DXpedilion . We decided against bringing an amplifier.W . 1990. It is q uiet. So why visit the place? The a nswer is found on its sparkling whi le beaches. SCOTT (KOSO) . Anguilla is de fin itely not Las Vegas. We selected An guilla on its many merits. Even nat ives complained about the heat. Scott K080 and wife Jo : and myself. BAND 2X 10 15 SSB 20 40 CW R!PORT VERIFI ED BY: . it was easy 10 erect the towe r a nd beam a nd hang the inve rted vee from the top. An gui lla B. Which of the grou p would go? Th ree couples dec ided to ma ke the tri p: Bob K8BL a nd his XYL Ma rcia.. He wrote our s imple. m. VP2EOH expresses satisfaction with the DXpt'ditioll results.. Nights are q uiet. Murphy had struck again! Afte r puuling over the rig for some time . across from the operating sift'.. The offseason rates began in mid-April. Nat Hodge. It would be too heavy. 1991 Ready A remaining task was findi ng a place to slay. WI HEO . We re built it. droppi ng the ends off each side of the villa . Since the villas we rented had flat roofs. And they welcomed hams! Now for the deposits and reservations. For a ham. We had borrowed a IS-foot alumi num lower 10 support our tribande r. and spouse Liz. operate d by Dee . - - -.O .. a nd ha s no cit ies at all . DEE (W1HEO) LAKE COUNTY ARA (OHIO) RADIO UTC DATE April 19 22 73 TN X osi. Easy licensing : Show you r U. On a beach on Sea Feathers Bay. Anothe r was the ha m lice nse . with s ignals pouring in from stateside . the vegetatio n is low-lying grasses a nd cactus. Then came a problem. Additional details o n VP2E came in a comprehensive Dxcr's g uide published by the Angu illa Amateu r Radio Association . on Anguilla during April 1990. it was go ing nowhere on SSB. cal m. a rriving in Anguilla after dark . No wonder the rig was tripp ing o ut. and we doubted thai we'd need it. • ~ Photo D. It did n't go together right. We headed for the offices of Radio Angu illa and presented o urselves to the official in charge. we decided to simply \cave the rotor unplugged a nd apply po we r only with the rig off the air. but d iscovered 10 ou r surprise that it was still in the box! So . searching for a due. snowy morning on April 18. VP2EOH . 60 Hz alternating cu rrent .. Bob K8BL tore the unit apart. Righi again! On a cold. arou nd 1:00 p. s ince the sun was high and so was the humidity . fee . Several candidates we re ide ntified by Soon K080 . for the most pa rt Anguilla is reside ntial ..S. We worked in what little shade we could find . we fo und a small triband beam at a sale price . either to urists or hams. We were right! We took an ICOM 735 transceiver and borrowed a powe r supply from a VP2E ham. Wh ile we had no idea why the pro blem e xisted . There a re 30 of them. . It had been a long day . February. Electrical supply is 11 5 vol ts. It was assembled. Sett ing Up a nd Getti ng O n Getting the station together was next. we began ou r trip. the rig died! While it worked in the FM mode. We all dug deeply into o ur credit cards and took the plunge . "Dee" WIH EO . with o ne of ou r main stops the El Morro Castle . chec ked o ut for lo w SW R. We headed for old San Juan . We we re in luck! The band was hopping. tic ket a nd pay a $38 U. We unplugged the rotor control and the stray voltage disappeared.--' . Th e Valley . • ---- - -. Gettin~ Pho to C. Puerto Rico . we began the co mplex asse mbly job . We tore it a part . one-page lice nses. ignori ng the parts left over.S . While the re a re a few exotic.) We also carried along a 4O-mete r inverted vee. with seve ral hou rs betwee n planes fo r sightseei ng. Since we q ualified by o perating in a contest-the North America n QSO Panywe picked EO H for Eastern Ohio Ha ms . the island is ideal. figu ring there would be enough activity on 10-40 meters. For seeke rs of glitte r and nightlife. ) Anyone planning a DXpedition the re sho uld write fo r this hand y reference . A great day to fly south 10 the sun! Ou r fli ght look us to San Juan . we left o n the last leg of our flight . a nd then shipped to Anguilla well ahead of o ur depart ure date . After some sho pping and a bite . along with colorful coral stretches offering some of the world's best scuba diving and snorkeling. VP2 EOH . Th at 's what we came for . We awake ned 10 ou r first day on Angu illa with a glowing sun and sparkl ing cobalt wa ters of the Ca ribbea n outside our villas. Fo rtu nately . In the mo nths leading up to our trip we pu lled together the radio gear. pricey resorts on the isla nd. and also issued us a special callsign. (Available from P . Three times! Finally . we settled for a reason able app roximation of its intended design . Bingo ! The coax feedline to the amenna showed 70 volts AC. Bob grabbed his voltmeter a nd checked some things. -Low Power Consumption CMOS Technology.lOven circuitry for very hfgh stabili ty ! _BA-40 40W. pwr.8 VDC out .T. (SPole Cryst al + 4 Pole Cer amic FUrs. W. 50239 conn. TTC300 TOUCH TONE CONTROLLER _High performance. (l ... .13.000 Amps! oThe Best device available 10 protect Autcpatch equipment from lightning damage. -PROM Memory. -ccces quickly field programmable via plug-in Coding Cards . 0.3AMAX. audio quality! Fast squelchl w/O. Not basically 1<1igil as wi th competitive units."Hang" Timer. To control any ON/OFF Function at a remote site via DTMF Radio Link . 220 MHz. TX local & remote Shutdown/Resel. amp. Amp . . Now Ava ilable w/Supe r Sharp FL4 Helical Resonator s. wIF. ) • New! 30 KHz B. also avail. .OOO5% Crys- . wlhigh immunity to falsing -ceccoes all 16 digits o3 0 N/pFF Functions per Main Card.60 dB. 1 Aux oe-ontuncuco. UHF AMP .5KHz. 100% Duty Cy cle! -Withstands High VSWR -rroe FM for exc. etc .. ~ I \ ::~. 0As used in the SCR 1000. S0239conn. Many unique 3<1igit codes available . caps. . SCT110 VHF XmtrlExciter Board -10 Wts.FL-6 : 6HI Q Resonators wl l h Lo-No lse Transi stor Amp (2M or 220 MHz) . Easilye xpandable to any no.0005% precision grade Ictal. .. + wide dynamic rangeReduces Overload. _Comph:ltely assmbld . Discriminator & Deviation Mtr. unit. 4Hl Q Helical Resonators & Lo-Nolse Tr. Assy ...spectrum Repeater/Link High Perfonnance Boards 81 SUb-Assemblies New FL-4UHF Helical Resonato~rs~ v. In shielded hou sing. VHF & UHF Receiver Boards SCR200A-VHF SCR450A-UHF • Totally Adlfllnced Deslgnl -8 Pole Front End sttr. for any type of control function. .. _4 input A F Mixer & Local Mic. Harmonics . ("Super Sharp" 'F Rtf. & Intermod . : 0 ." .. "rime-Out" Timer. or Assy. Outputs! .Write/ca ll for details and a data sheet RPCM Board . COR .P filter & rei . of functions w/Expansion Cards . 30. SCTll0 Transmitter Assembly Complete Receiver Assemblies -SCT1 10 mounted In shle/dlHi housing -seme es used on SCR 1000 & 2000X -R cvr. -uses new high Quality Xtal Controlled Decoder iC . Board mounted in shielded housing . _10. OUT. elncludes inputs & outputs for panel controls & lamps._. BD.. w/F .75dB." .T.Complete solid state con lrol for rptr. 115/230 i n . also available .Provides tremendou s relection o f " OU I~f­ band " signa ls w/ out t he usualloss l Can often be used instead of large expensive cavity fillers. & 440 MHz ID250A CW 10 & Audio Mixer Board -Improvedl Now Includes " aud io mute" circuit and "Emergency Power 10" option. Super versatile design. ~ .Spurious ..) lal. Built-In timers. Audio AGC .s ens." HEAT SINK . _ SCAP Autopatch Board _Provides ali basic eutcpatcn f unctions -sscure 3 Digit Access. -l 3OdB@ ± 30KHz. Power Supply Boards . 2M . Faclory programmed. -Extremely helpful et sites wilh many nearby Iransmlttees to " fiIter-out" Ihese cur-et-bane signals.JE !5ix t rem e Environments ( -30 to 60 ° C. 50/60 H z . CTC100 Rptr. 3 sec.lA total max.Exc. unit also available for H/gh SPHd Packet. sc'r 410B UHF Transmitter Bd.) All Equipment Assembled & Tested . 10 Wts. Lightning Arrester For Autopatch -a ee Discharge Tube shunts phone line surges to ground -Handles up to 40.Used w/ SCA P board to provide " Reverse Patch " and Land -Line Control of Repeater qncludes land-line " answering " ci rcuitry .Massive 30 lb. Amp board & Heat sink.. Greatly red uces 1M & " out of band " interference! FL-4H Receiv~r Front-End Preselectors . L. For 10M. nom. • 30A @ 700/0 duty . ASS Y.In c lu des "on boa rd " proportIonal Xta / Osc. -Wilh .250 bits/channel. -BA75 75 WI .SCP51 2 12 VDC @ l A & 5 VDC @ o... (42 0-470 MHz) . sensor. service. caps.25 jlV/12dB SINAD typ o . CIRCLE 5 1 ON REAOER SERVICE CA RD . Spurious Resp . Gold-plated connectors. out.FL-4H.BA·30 30 WI .J ~v These are professional " Commercial Grade" Units-Designed for :s:~~: ~r::~:r Unit -z.as oor. «Transistor Switch outputs can directly trigger solid slate circuitry or relays . 25A @ 100% duty. etc. POWER SUPPLY Call or Write for Data Sheets -Similar 10 SCT110. audio quality .Designed specificially for con tinuous rptr. COMPLETE SHIELDED RCVR. . " . -Compretety assembled & l ested. SCP30 HEAVY DUTY 30 AMP RACK MT.s ereee e ± 6. Beautiful Audio! -011 inhibit bet. _.' ~ " . Ready to drop into your .Up to 4 different 10 Channels! -Many ether featu res. system! 0UHF Rcvr. Output.• " • '" '~k_ . 5VDC Input.. Transfo rme r & H e a t Sinks .SCP12 12 VDC @ O. '5 MeIer'. -tatcneo or pulsed outputs. or 75 WI. etc .IF Fffter SCT410B Transmitter Assy. Very low in " whil e noise. COR Timer/Control Bd. . Magnet Wire . Gnd . so obviously we we re doi ng we ll with our 100 wa tts ..va t44·220 440 Mnz Mod.'fawlJlW P. Un" operates 00 3 We I:r" and measures 2 112" X I 114". P w r .ftd to th<l le m ina ls.62" X 4 . it 's tough to pick out calls.. we discovered the 2 meie r repeate r o n the island and use d it to c ontact lo c al s V P2EOH and VP2EE.OER SERVICE C.D. PS-12S S37.00. so wait a few seconds before transmitti ng your call.ping and handling for ". Regu lated."'.00 ($3..8 00 :82 6:54 32 C_ ""DI<I"""i.. Being DX is a great experie nce . PS-2424 $30. to make up sho rt list s based upon the last two letlers o f a c all. Z... Frequency and FM conversion kits . available. style. 1600 mAH..838). Oi'. 5.D.RO w..j r" unil comesl . $ ' 00 . After ma k ing contact.. . Open l'am. A nd we invite you 10 plan your DX ped it ion . -.I. 314 si..00 La'{/'> quanl ~i .000 ITEMS A LL ELECTRONICS CORP. INC We s tock . w he n necessary . Doing this cut do wn the size of the pile by 60 %. 48 conb-"""fal U. time you r calls .. 50 /HI' ord.O D..n. CIRC L£ 1 9 4 ON RU. al. w ith 8 \ % o n SS B and 19 % on CW o T he lio n's share of QSOs were on 10 meters (2.S. "r---.. CoJTTllete "'~ h instruClo:m on how to wi. we worked 4.95."entian gel 1.. and doesn' t cost muc h more tha n a regular vacat ion to the sa me spot.1" high.D. T wo hours of inte nse operating in the tro pical heat was about the rig ht span. eventually settli ng on a two-hours-on . NO C. & m ore 7319' .ds sold. MarShl•• tc .. F irst. 210 ~1d 330 V~t CATt PPC . CAT. We lea rned a fe w other th ings in the process that may interest D Xe rs . For five days we kepi VP2 EO H o n the air about 18 hours daily .75 Men 10 to... 0' Mast Ext..00 • 100 IQ.. We alternated operaring.oo .. so we sampled some of the cuis ine at lunc h. T hese ite ms a rc usua lly give n abou t every fi ve minutes o r so.. w ith openings to Nort h Ame r ica a nd Europe well into the evening hours .'h..1u. Snorkel ing and scuba d iving we re excel lent..ng 10 Tow.I.oJl-<:ad batteri es.4a mps . fo llo wed by 15 and 20 me ters wit h 686 each. Box 5 67 · Van Nuys.ndt ln9 the iflpv18 and Ope n irarne 81 )'1 e. We tried 10 g ive our QS L FLASHING L. don' t waste t ime during a contact as king for rout ine info such as QSL rou tes ....EIl.I. Un ~ continually flash es \ 'MHtn 5 VOIIS is applie<l..75 each) POWER SUPPLIES ElectfOflk>. llfIt1i:iJ' 1d3a1for us..4!1 o rhfl" including All'.- 51 prepped wil li 1. Martin nearby . Is each contact just call a nd report? O r is the D Xer collecti ng QT Hs and names? Note wh at 's go ing on before tra nsmitting . T . D uring big pile-ups.. T he salt water assist was d ramatically ev ide nt.• • O&5ign . . CAT. who had o bvio usly been camped out o n frequen cy waiting for us to show up.00 Shlp plng. 1. and all con tinen ts. 79" dia. We averaged slightly over one contact per m inute.. listen to the DXer 's panem .t. fo ur.5 Vons. French restaurants abou nd . In fact. $lyle. Our villas provided us w ith a g rea t view of St. c raft galler ies a nd va rious beaches .50' 1001<.94· X 4 .87" X 2. PRICE REDUCED ON 10 DR MORE. as a l irobe.S A 1 3. with no calls heard. • HC·24 ·2. ------------------Cafl Toll Free. 50 states. rru. of cou rse . --- CAT' FS H·l $3. Box 567· Van Nuys . we wou ld ha ve to ma inta in d isci pl ine on fr equency a nd use a system 10 pic k OU! the c alls.nl.4" b lack and ted wire '.O£R SERVICE C. mo st operatorsespecially the st ateside DXe rs. stopping at shops..d Oo~bl. Our experience wi th big pile-ups showed the value of aski ng for j ust the last two letters of a c all. name and other info about Fax: 708·50 6·1 970 800·828·3340 708·506·1811 CIRCLE 2S 1 ON RE. Coax . nd.~-:. Full calls or la st two lette rs? iii .RO We ho pe yo u wo rked VP2EOH. Cal l t or pricing b ro ug ht a n instant response from o ne of o ur fellow radio cl ub mem bers. . GREEN CAn l ED-4 G WLOW CAT' LEO"". 4 ... as we di d . so plan ear ly to insure a smooth DX operation. 1npu1: 100-240 Vac (Wired 10' 115 Vae) Outpul: 12 Vdc @5arrp. 'S CIRCLE 84 ON RUDER SERVICE C. so wc naturall y took the 20-minute fe rry ride over for a look . 7" X 4 314' X 3" high. prepped powe< $upply ACDC Mor.: route..5N3· 1 New.. . HDNCB-C 10 piecell 10' $42. PIicef s<hiflcl to CNngfI wi thou! not"".om a U.. PS-S3 $10. with bu i~ in llashing undo PULSE RATE::I Hz@ 5 VoI\I2O ma . X 1. restau rants . ed to • • • • • • • O.oo Sa·@ '44 eroaObar'Kl· Tunas OulSLdo BaflCl SO·239 FaoO· Vory Low Loss SI". These n _ capacitOrll that h aVfl b&en . HI.2 I'Oh . we didn 't rea lize what the sound o f that de mand wo uld be at ou r e nd.210 S1.ID. repa ir books.ups got bad a nd. Next . CAT.V .E. Operales belweon 4 .50 ($4 .0"$90 . RD every five minu tes or so. RegU131ed. We also tha nked people for being patient while we worked as fast as we could . Afte r that. 50" eSA listed . location. 8. Our log showed 87 coun tries. P.. Despite the lime out for sightseei ng. rechargeable nic l<.t. 5.li~ l:J- a.er 01 cameras.rell and COnfleC1Of$ IIOld..hours-off cycle . S".5O each 24 Vdc 2.~. Opeol ra "".. ..r.4 AMP PllW9r·One Inc. "I«t flu (6 ~ 6 1/2 ~ 7 ") Ouan!ilifls Litnilfld. We quickly deci ded that if we we re to ach ieve an e fficient rate of contacts. Condilio ns we re ve ry good . CAT. .I.vaf)' Eff":Ianl R~gg&d Con$l<\lCIion· Tastac al Sea S. it was lime to hit the beach or go sightseei ng.. highpe rfo rma nce accessones Thousands of satisfied customers since 1976 1 cata:o $2.4 !npUl: 11!i1230 ired for 115 Vae) OutpUl: 24 Vdc @ 2.. MA. PR or Canada musl pay full shWong Al ordrml dfl litlflr&d in CllLfFQRNlA must includfl srar." rning light or ". we drove carefully on the left side of the road. Mark KB8FKM .00NCh · 10 101$9.1pu.. O ur system was to go by call areas w he neve r the pile. It 's great fun.... the first thing someone wor king a DX station sho uld do is transmit their call and make sure it's copied correctly by the DX stati o n. _f .D.>1. Plan ni ng You r O wn I>Xpedition !"'O~L FFlEf OROER LINES "\ 1.. it's the vacat ion of a lifetime! Many de t a ils m ust be covered in ad vance. IDE AL AS AN INDICA TO R. 02050 5Vdc3AMP W~h S79. r ERMS: Minimvm orde. . Ga.I. $35 00 Ruboeon C: phOlollash capado.. We specialize in CB radio mod ification plans and ha rdwa re. " .{Jro.. While checking out the isla nd in ou r re ntal car.el ' ·800-874·2SS0 YISA·MC OK No Ewa cnarg. plans. CAT' LED.25 Bach • 10 tOf S 11. DIffused LE..00 each vee (.25 each) 100 pieces l or $375. ch o~put$ 12 Vdc5 AMP ACDC El eCl' OfIies " 12N5 or eq uiy.. 0. CA 91408 •• New·· FLASH UNIT This NEW corrpaCl flash .oa. It so unded lik e buzzing bees.273 statio ns in the five days we were on the ai r. Roto r . It was outsta nd ing! Later.. B ra id . L SERVICES 1 1 Walnut St.s". CA ·91408 CABLE X·PERTS . • AI: Naw Iooo.chase 01 new. A nd the pile-ups! W hile we realized tha t VP2E was somewhat in dema nd. Signal re ports we re good..5 Volts and 5. T ak e it from o ne w ho's do ne it. Also.nIS and Hardwar. Ul and CSA 'sted..CHAROSORO~Iltt~.II Mounl. or clip this coupon FREE 60 Page Cata log Containing over 4.00 HEAVY·DUTY NICKEL CADMIUM "C" SA TTERY Yuasa lBOOC Spec. About 57% o f our contacts we re stateside..are to be co ngrat ulated for thei r on-the-ai r disci pline.. BROADCAST T ECHNI C. Input 115 Vae. Cuslomars RaPOI! VOf)' Pos..\\ _ $l.03· X 2".. We fou nd that often the tai l-ender was the only o ne we copied . 1 10 . __ ~ manufa<. . CMOS logic lor low. 10 go with COR·3 $59 • Available for the 2M.1' liZ''' .If you always thought a microprocessor-controlled repeater had to be expensive. Request cata10g for compIefe listings. Use with above lor sin'Pex 0jJ8I alio " using a Iransceiwr $39 FM EXCITERS : kits $99. . FM RECEIVERS. O!S glllld n lIy tor r. frn. and lirMr. Ab.. . M wlcase $69.5: k.che' out of ~ne during l"n""lt. kil with pcb only.R220 FM RECEIVERS for 2U. FET ONLY $ 7 9 . dynamic range .~ \. CIRCU: 57 ON REAO£R $. linkIng repeate.I~:. Tower rnoo. 144-1~. Only 5/fJW x t ·5/8"L ~ 314'H..odion.~ ... n.plete COR and CWlO all on one board lor 00$0J construebOn. to 2M. Cw speed end tone. 902MH. eocve GaA.med inlo 1hlI eprom a11hl1 tactory. I L.I20. Use will1 base Of mobile If. Oulpul Iram lOW to ltXM'.t IlISs case $49. 12'o-15D.-. Many buill-ln dlllgnoati<: & tes tJo 'lOl fLn:tiona u:sng miaoplocessol'.JIQ-81 I$". 432. kots $139. 454 131· Iso. wilh toll--eall restrlclor. Aul~ch .l5uV sen5Ilivily! Bolh crystal & ceramic if fillers ~ helical resonalor frDl"ll eod for exceptjonal $8leClMty : :> l00dB at t121<Hz (best a~ailable anywhere!) Fluller-prool hysteresis squelch: ale tracks dritl.. . COUr19Sy beep. 0'I0ice 01 kl with case & BNC iad<S. 13-2OdB. ·Sp<lCify r<Jning range: 142-1..er or mg tone on 1hlI air. VHF input rang" . . Mo-202 fSK DATA MODULATOR k~ FUl up to 1200 baud digital signals ltVough any 1m transmiller with flA handshakes.. PEM nuts hold ..! LNG-(*) -ONLY $59 FEATURES: . etc _ $39 DE·202 FSK DEMODULATOR kit for receive end of link _ S39 9600 BAUD DIGITAL RF LINKS ... aN. wit $189.]o-_ J~ _ ~ 1~ l ~. GaAs FEl Ironl end. 1"11 i'l case $99 TRANSMITTING CONVERTERS XV2 lor " hf and XV4 lor uhf. at a fraction of the cost of comparable units! REP-200 REPEATER A premium repeater with autopatch and many versatile dtmf control features at less than many charge 'or a bare-bones repealer! We don't skimp on rf modules. Lowca. TA51 for 2M.. 435-437. Can tum 5 functions orv"oIf.. 200-2'10. 22OMHz.. 14S. kots startWlg lit $79.. 151).vall: 136-138. COlor coded leel's Indlcale slatus 01 aI major lu' dioi IS. ~ mulli-1On8 btxslS.l packet network~ system.. or c:Iosed--aa::es for repealer or aAopatd!. ~atlIe lor any tone . CO~ kit Co". FCC type acCfJpled for com" uhf & hi Ntlds.. 1001 $79 AP ·3 AUTOPATCH kd. • $Ix court. 22OMHz.. .'l5. R90 1 902·928MHz FM RCVR. .. ~~.utomalJcaOy '. m conlin· uous dutr. . O. fimtled in egg:sheD while and bladI. .. except uses COR·4 KI1 only $795. . REP·200V Economy Repeater KIt. diode·swdched PA's output 15 or SlYN. 15().l"es .dII••1ed .174. designed for continuous duty.. Kit $1095. t)t 1IOQ-/IlliO MHz. end other optiollS. 4-35.7dB vhf. receiver." . tw cotcot.rotinO brackets indo . . Kit $129. sharp crystal filters. Separate 4-dogll control code tor each h. 55·1lO. end courtesy beep type can • 0 b<I changed al any lime by CM'nef-pass"ord-protected dlmt /XlI'IYl1a"ldS. Owne< u n Inhlbll autopatct1 or repealer. programmable. or wit. 15(). • AUTOPATCH : em.'..1 210-230. ~. High gain.nk . RI44... (ll fi'Nout: wll ~. PREAMP ONLV $ 2 4 Ikll.ENCODER kit. two types: ao. For 1m. ken::h. PA's up to 45W avauaore..147. R137 WEATHER SATELLITE RCVA for 137 MHz.. FCC ry~ aceepled (vhf and uhf commen. lCXO & xtaI oven optIOnS available. 435. pa. l o/l< aOrntricl aulo-disconnecl:. .410 TO-2 TOUCH-TONE DECODER/CONTROLLER kd..50. WId. 150-200. GaAa FET Ir(r1l end.end. excepl . etc. Ia up 10 100w. 42'0-450. . and for atv. 400--410. Kits $129._ $99 • 3-112 inc::tI a1oxn1lum rado: panel. JS. hys teresis squelch. • R.. Slable : low--feedbad< (luak)ate FET ' SpoUy flnrIg zs. IQ-114. telemetry gear.(*).' f. Triple-conV9lsion. Waldlld par1ItIOf'ls for e)(Ciler. O. $eYeral models. Rugglld . 200-2~ CIt --- HELICA L RESONATOR PREAMPS Pleamps with 3 or 4 section helical resonators rlld ucelrrtermod & c rOllband Interferen-ce in crilic:al appIiocalions MO DEL HRG.. kit w fOlJSe $59. Great for seectve cding.mjlar to LN G. Power output 1S. 150-IQ . TAgo l for902·9:28MHz. . 14$-148: kt IlISs case $39. and local speaker am~ifi9r $49 CWID k~. irduding two ald8ry extemal circuts.£RYICE CARD S89 UHF Input rang" .resist overload . &IX rC'il'.TA451 for~. EPROM pr0grammed: specify caJI . wit. CIt 400-500 -LNS-(*) $99 __N • GaAs FET Pre<Ynp with leab. en8IbIe either open. speed. or 22OMHz.. except dasigned for low Call & amatl alze. 21:J--233.".zo. helical resonators.. end controller. LOOK AGAIN ! You could eas ily spend this much just for a controller. OBdB U1l .174.~$ l (. 1 fi'N on 22OMHz: 1 rJrN on uhf or 902MHz.1 '!.go ~ . 1"/0 helical l es. wit o nly $1295! GaAs FET PREAMPS ACCESSORIES TD-3 SUBAUDIBL£ TONE DECODER. Interface d irectly wrth most lNC's . 44OMHz. w/! $169. with remot e control 8divate/deaaiva prcMsions $24 '. Kit on ly $79. solid·SlatE> relay. SpKiry /Lning rave: 2~. • Accessory add-on PA's available with po_r . Many ~ leatu'es.3O. dtml command codes.~~ . . irduding two pleM Mll. courtesy beep anc::IlaiI m-s.55. similar to MINIATURE IN-LI NE PREAMP arocr cowcner withovl OTMF control or auropatcn LNW-(*) RECEIVING CONVERTERS Low noise COI1Yerllll'$ to recefve Yhl end uhl bands 0r1 • 1011 ree. sitlIlIIa-m. ocoe programme<:! any time in the field..onstn1plion. R451 UHF FM RCVR .. Easity mounts in many radios. • DTMf CONTROL: CMIl' 45 fudioilS CiII1 be COilll olled by toueh--tone. SC I· .peale. to LNG series. llO. • Auxlllary recel"er Input for noependent control or era.It: 432·434 . in case • . .clter end PA. The ewicl T!Uage... ay bHp tw". $49 Yhf. COR·3 REPEATER CONTROLLER kd Featur es adjuSlable tail & time-cot timers. Requesf catalog for complele li stings.. for Instance: GaAs FET front.If. Radio link ccmpulers.z bands. IroiI n a case. .$-4-37. Full 16 digds. Reverse patch & phooe line remote control are SId . plus axtre ~iglt owner password . filler... ON. or ale. M~s 10 COIlVar1 10M sse. 451). r _ patch. s up 10 25W. $39 . depends on freq . adjustable lone. Very low noise.GaAs FET Preamp s. $94 uhf . As above..power c.:ial bands ). . rave: ~ ~~~.1 ffN (25W option) on 2M or h1-bancl. either! Che<:k the features on R144 Receiver. $79 AP-2 SIMPLEX AVTOPATCH Tming Board M . • VHf & UHF AMPUFIERS. """'" . . 2M. wll $189.open or closlld ace IS. 0\IIII'lII"-specified clefauft parameters tor COi' end ewicl timers and tones ara bl. A76 ECONO MY FM ACVA lor 6M. Use with above for repeater aulopatcl1. f ast. consisting of new MO-96 Modem and special verao ns of our 220 or 450 mHz FM Transmitters and Receivers. and enable I(lI caIs. All three are located on one PC board on the 902 MHz version . only some careful soldering whe n installing these diodes. a nd even 2 meter FM transcei ve rs. These devices offer broadbanded. no tuning adjustments are necessary. Th e SHF·LO e mp loys a 2-stage ci rc uit o f BFX89 d evices. 1991 The manual forthe SHF LO states thai it can be built in under two hours. An option allows the user 4 dBm more gain (required for the 2304 input). although the SHF-2304 tra nsverter board is smaller in size. th is proce ss isn't euthat d ifficult. In each c ase. ARl Troy ME 04987 Explore the microwave bands with these easy-to-build kits. but higher outputs can be obtained w ith more drive and LO injectio n. it can be an uphill bailie all the way with all of the precise assembly and alignment involved! Things have changed considerably with the advent of microwave monolithic integrated circuits (MMIC s) over the past few years. 1296 M Hz. Our review versions (S HF-124O and SHF-2304) are very similar in operation and appearance . 2304 M Hz. the best method has been to " roll your own" equipment.! The SHF Transverters Currently. along with etched microstrip circuitry. ma king the m a natural for use w ith 2 mete r m ultimode equipment. while a tiny diode pack of HP-H S MS2822 diodes do the tric k at 2304. l Ed. SHF Systems etters transvenere for 902 MHz . Several man ufacturers have o ffered a line 01 linear transm it and receive converters (known as u ensveners) that are ready to ru n out of the box. The AX conversion gain is typically 20-25 dB. Actual TX and RX mixing is performed by a pair of HP2635 d iodes on the SHF 1240. and re c e iv e downconverter. even the basic kit bu ilder can be up and running on several microwave bands with a minimum of test equipment and time. Although the noise figure performance of the MMICs used is quite good. and they are reasonab ly stable in operation. A series of MMICs and o ne HP2835 diode multi- (207) 948-374 1 Price Class: $140-$310 ply the signal into the 540-580 MHz range. or that both sides could be used fo r the same purpose. resulting in an LO injectio n frequency of1152 MHz. As in the LO . O ne 01 the biggest obstacles to increasing t he am at eur popu lation on o ur mi- crowave bands has been. February. SHF Systems has introduced a line of linear transverters which m ake ex tensive use of these devices. 40 73AmaieurRadio TOday . Both boards a re co mp letely symmetrical. Both 144 MHz IF ports are coupled to a pair of Wilkenson splitters in a " rat race" mixer scheme . Two 3-stage bandpass filters and one Iowpass filter ensure a clean signal at the output. For those who don't.rd 73 Review by Peter H . As a result. Typic al power output on both boards is in the range of 10 mW. but at prices thai may d iscourage newcomers . For those with the technical know-how. e ither completely from scratch or fr om a kit. This means that either side of the board can be used as a rece iv e or transmit converter. more than enough to drive the front end of a 2 meter multimode transceiver. Most cases of trouble with these kit s are a result of incorrect lead positioning. the LO signal is d0ubled by another HP2835 diode into two more MMICs and associated fillers . dif· terent MMICs are used as TX and RX gain stages with a-pore bandpass filters between the cascaded gain stages. with diHer· ent crystal frequencies. The SHF-1240 transvef1er board (1296 MHz). In either case. At 2304 MHz. I took j ust about two hours to be extra careful. there are no tuning adj ustme nts to be made. large c ase MMICS (such as MSA~ types) have a dot on the OUTPUT lead. and smaller MMICs (such as the MSA~) have it on the INPUT lead. transm it ucccn ven er. Putman KT28 SHF Systems Linear Transverters for 1240 and 2304 MHz Down East Microwave Box 2310. Note : Down East Microwave is the sole distributor of the SHF Systems kits. Theother three use a separate LO board . the lack o f ready-made equipment at reasonable pnces. For 1296 operation. T he key to a stable mic rowave signal is a stable local oscillato r. no-tune performance with reasonable gain and noise figures at artcrceore prices. Both use the same LO circuit. and who possess o nly a basic knowledge of m icrowave operation. These mixers are quite sensitive. a GaAsFET preamplifier on the AX side w ill yield noticeable imp rove me nt. For the record. since tile case lead identifICation on the various MMICs can be c o nf usi ng. If you have access 10 microwave lest equipment. and continues to be. the complete transverter c onsists of a local oscillator (LO) . Construc tion Photo A. You won 't need much test equipment to . M MICs can be used both as low-power A F gain stages and as AF amplifiers o n receive. Depending on the model. and 3456 MHz.Number 10 o n yOtlf Feedback c. functioning as a crysta l oscillator and buller amplifier. and both systems use an intermediate frequenc y (IF) of 144 MHz. as only 1 mW of e ne rgy at 144 MHz is req uired for drive. operation is similar except that the 4th harmonic of the LO is selected (2160 MHZ) and filtered before injection into the W ilkenson spl itter. > . H A M E QUI PMENT CALL TODAY FOR SPECIAL QUOTE P .<OABLE ~ eec« "':: We ::lWl' ·... AMATEUR CENTER CALL OR WRITE FOR SPfCIAL QUOTf II'lI'1en II comes 10 FAST DELIVERY HO~EST DEALI"<G and PROMPT OEPE... We stand proud 01 th is long·lastlng tradition of Honest Dea ling. W! WBBEn l~ JiIi TAKE AGOOD LOOK AT OUR GOOD-LOOKING POWER SUPPLY VIDEO 1.."d @'. ·1'. R. OK 15810 Tripp Lite also makes a complete line of Power Protection Products for your microprocessor-based radios a nd computers..12 VDC Operation -lnsta nt Video 10 ' Video Relay for switching in Live Camera Video -B uilt-m Automatic Sequencer-Timer (steps through all four screens) VDG·l with pre-programmed call s: $99 Call or write for catalog of available graphics ELKTRONICS Tripp Lite's New PR Series Power Supplies Complement Your Equipment 12536 T... because of his intense interest in amateur radio. BOARD ' Custom Graphics with your Call Sign -4 $creens (2 Hi·resl2 color bar) .f'" CIRCLE 255 ON REAOER $ERI/ICE CARD CIRCU • ON READER SERVICE CARD Y O UR H AM D O LLAR GOES F URTH ER AT .R.. \. Stan Burghardt (W(Z)IT).. 10 be ( OU rl . :=.. began selling and servicm q amateur radio equipmen t in conjunc tion With his radio parts business. profess ional ELKTRONIC5 appearance.~ ""Tl-IE f'OWfl PEOI'I.cago . Maple Write today for our lotest Bulletin /Used Equipment List. including ISOBAR' 500 N Orleans Surge Supp ressors. E GIVE ." 8 60610-4188 <o. 1111 ". . (011 _ n.O ... And always remember : WE SERVICE WHAT WE AEA Alinco Amerltron Amphenol Ampire Antenna Speciali sts Astron B&W Belden Bencher Bird Butternut Centurion Da iwa Hustler Kantronic s Kenwood larsen eES Mirage/KLM Mosley Cu shcraft 312/329-1777 FAX 312/644 ·6$05 MFJ ssu Pal o mar Rad io Callbook Rltron Aohn Telex /Hygain Ten-Tee Unad illa/Rey c o Yaesu Ca ll or Wr il" U_ Tooa ' Fo r a Qool " ! Yo u ' lI F ond L: . O H 4 5 840 (4 19 ) 4 2 2..._ . - STORE HOURS: ' ·l . you get affordable good looks that harmonize with your equipment fo r an integrated. IoI_n _ . .0. _ n Get the most of HF Mobiling Yaesu FT·747GX SPECIAL OFFER! 182 N . ble anJ Hon"' 1 (605) 886·7314 FAX (605) 886-3444 PHON' _._. l2536 TA 77 fUldl.__..lSI aove-t se I . ~ CALL US NOW! " AMl RIU 'S MOST RUlABLE AMAnUR RADIO DEALER" SELL·TRADE New & Reconditioned ~t/ r-r ""'\ In 1937. 60 and even 90·day parts and labor warranties on selec ted pieces. Bo~ 73 Watertown... to I. C h. 77· Findlay.. 8 2 0 6 With Tri pp Lite's new PR Series DC Power Supplies. . we fully intend to car ryon thiS proud tradition with even more ne w prod uct lines plus the same " fair " treat ment you 've come to rely on.. K oo" Il. Our reconditioned equipment is of the fines t quality with 30...)] ]]] ~D . SO 57201 ' - --' . Line Conditioners a nd Battery Backup Systems.. Quality Products and Dependable " S· E-R-V-I·C· E " ! Above all.. current. For 1296. Repositioning a r&Once the MMICs are soldered in . without destroying them. and all 01 Photo B.actual 1296 Irequency was oN by check the LO. and watch those case dots! this frequency. due to a downgrading by Avantek 01 MMIC installation is simple. however. I use diode probe and FETVOM will suionly the fi rst gai n stage w hich fice lor relative output. with a BNC at 144 MHz. usi ng copper off the bat . the displayed rrequeorange 01 200 mA. depending on the modvery small components. The SHF power when mountaintopping with 1240 version is assembled on G10 a 45 element loop yagi. Thanks. Bill Olson of Down East Microwave has the LO to the back of the SHF 1240 board made every effort to ensure that buyers 01 and insta lled t he combination in a Rathese kits get the correct information wh en dio Shack metal hou sing (C ArN 270-272). Due to tolerin an enclosure with a PIN diode IF switch is was also added . gain stages brought the output up to 2 warts. reading low by peak will be observed. so " Iactory support" rates an A +. Unlike the 1296 kit . and is suitable for the builder with basic East Microwave) offers a PIN-diode IF switch and attenuator kit as an accessory. FortunateAs with any mic ro wave equiply. SMA connecing down into the 11 . questions do arise-even to the extent of shipusing BNC connectors lor 1296 RX and TX connections as well as 144 MHz In/Oul. Having a knowledgecan handle up to 3 warts of 144 MHz energy. I sugthis device Irom " unco nditionally gest cutting the leads prior to solstable" to " COnd itionally stable" at dering. Doubling over a strip of maski ng signal source on receive . When portable. so you won't break the bank il the chi p ca pac ito rs a nd d iod e you goof up. SHF 2401K receive converter (for mode S receive). And you'll have the the station. Since this combination is taintops and it has been extre mely RX converter and LO board. A pair of Frontier Microwave ances in the LO crystal used . about . low-risk way to become active on mipreamplifier and RF power module completes crowave frequencies. more than enough varying levels 01 difficulty. Photo D. able ham lriend is a plus. the transverter ab le over a range 01 battery volt ages. I use a dual power to verify the act ual output freq uency supply system in the base station . much smaUer. Photo C.5 volt level without diffi$225. Bill! chassis also accommodates the PIN diode board. needs 12 VDC and develops about The transverter boards present 300 mW output. no scheBoth tran sverters have worked very well here and in portable operations. they are also relativel y ine xpen ment . The SHF-124O complete kit . This adds unit exhibited some instability in the about 30 minutes to an hour to the MSA0885 TX output stage. III reu- 42 73AmateurRadio Today · February. the tions . For 2304. Since tape on paper and sticking the parts to it until there's no tuning to be done. including tors were used at the 2304 RX and TX connecculty. They both worked right bottom ground pla ne. The SHF-LO board. is $195. The SHF 2304 uses Other ObselVations Rogers Duroid material. work· in an enclosure with a PIN diode IF switch is diode board into this enclosure. This kit kit-building experience . The add ition of a Down East 1296 To summarize. complete transverter kit using an Avantek ATF10135 device which Yaesu FT·29(lRIl transceiver. I can honestly say that these are the grounding holes lor each MMIC the easiest microwave kits I've ever must be soldered from the top to the assembled. I was able to fit it and the PIN the assembled board is $179. I suggest USing a well-lit Testing the transverter boards work area and placing sheets 01 may require nothing more than a white typewriter paper under the sensit ive frequency counter on transmit. epoxy board and can be done in about one hour. and another 2304 MHz components to locate them quickly. A while you ma ke this adjustm ent.8 kHz from what was disas you peak the crystal trimmer for played. sister lead to function as a choke they are very difficult to remove cured the problem . you 'll be working with some sive ($2-$6. added benefit 01 learning a few things about The 2304 MHz stat ion was installed in an microstrip and surface-mount construction enclosure sold by Down East Micro wave . is priced at $1 39. although the 2304 MHz foil sup plied in the kit. techniques along the way . packs . giving me 6 walls output in a small package. 1991 . Since the 2 watt gain block higher freq uency counter is ha ndy needs 24 VDC.as it had several errors on a hand-drawn pictorial d iagram and Performance showed two resistors connected to the wrong leads on MMICs. A simple YOM will do. A 600 MHz or 5 kHz . documentation a C . This will typically be in the On 2304. The SHF 1240 complete transver1er. the un its will needed works very well. This is jee. I give the depending on the resistors installed. inc lUding TXI Again. I soldered matics are shown. I an inexpensive 2304 GaAsFET preamplifier found it to be unnecessary when used with a assembled board $235. the LO was soldered to the back 01 the I' ve used the 1296 station twice from mount ransverter board. Down East sells MMIC IF post-amplilier stage as an option. either work line or they won't work at all when The documentation for these kits is conpowered up! The inp ut power level of 1 mW stantly being upgraded. so the distributor (Down B +. my $310. Although the PIN diode board offe rs a TXlRX converter and LO board. or a this system. An surplus Microwave Associates 24 RF millivoltmeter can be used to VDC SMA relay is also powered by me as ure actual LO levels. This ping some extra parts gratis. The SHF-2304 complete kit . and a distinct cy was much closer. it rates a may be problematic. especially el). both kits represent a lowcost. Orange.S. 1-800-854-0547 CtRCl. Taft Ave. $59. It contains a crystal controlled. Why carry that heavy gear when its size is only 1.COMMUNICATIONS .0 x . Instead of sift ing th rough the field .E 1 0 OJ! READEIl SERVICE CAl'lO .. legen da ry.A.95 each .. use our super quick one day del ivery and cash in on a rare find.95. one yea r wa rranty. CA 92665-42% Loca l (71 4} 998-302 1 • FAX (7141974-3420 Entire U. OU TDTD-I will decode 5040..a re a! We just struck gold with a miniature. single chip DTMF decoder th at works great in bad signal (0 noise envi ronme nts and provides latched and mo mentary o utputs .SPECIAlISTS 426 W. high qual ity and very re liable DTMF decoder at a rock bottom price of $59.4 inches a nd it co mes with o ur etc hed in sto ne.J=. 4 digit codes wit h the security of wrong digi t reset.25 x 2. sea rching. - - - - - - - - - - - - - - - -- HOWTOENTER Visit your local part icipating amateur rad io d ealer and fill o ut an Official Entf)' Surv e y. Only one entry per month per person. Duplicate entries will be disqualified. Once c \'ery' month , we will pick 5 names from every participaring retail o u tlet. • One of these lucky hams will recewe that month's prize package. bur all of them w ill be entered in the Grand Prize Drawtng. to be h eld in Ap ril 19 9 1. Visit yo u lo cal re tailer every month to c heck if your n ame is on the Ham It Up! TOle Bo ard , w hich lists all the G rand Pr ize entrants from th ai store . While yo u' re there , fill o ut the next month's Offici al Entry Su rvey. Remember , yo u can en te r o nce every month . You get six chances to w in a fabul ou s prize package and six chances to be included in the Grand Prize Drawing! After we've g tven away all of the: mo n th ly p rize packages, we 'll take the Grand Prize Drawing entries (30 from each par ticipating retailer) and gfve away over 130 ,000 worth of great h am gear. " If you = u _ ,.. nu...... a IonJ ....... Itt. you ""'t obI ain an OffiCW En,,.,. !iu""~ ' I>y >end"", an S.A S E, ,.. Ham ., l 'p' S..·C1<J"'l :dl.... ' ) A""" nI' IUd;" Tocl..>;y . Forni R~ . lIanrock . S H O,"'tll . Ilnum , ,,," ....,ry In , ,,," ........ addl'nl> . and fOIl ..,ill "" ... ,CfC'd ' h"""Kh l 'ock '&'.'....·. I1.......wlf "''''"q' This Month's Prize Package is worth over $1,000.001 If you' re this mon th' s winner, you'll receive an MFJ Prize Package. includi ng: MFJ-422B KeyerfPadd le Combination MFJ-8l6 HF SWRlWaltmeter MFJ-I08B Dual clock MFJ-30Golden Class ics of Yesterday by David Ingram K4TWJ MFJ-32 Packet Radio is Made Easy by Buck Rogers K4ABT MFJ-35 The Wonderful World of Ham Radio by Richard Skiln ik KB4LCS MFJ-1 281 Easy OX Software (IBM compatable) MFJ -1286 Gray Line OX Advantage software (IBM comparable) Plus, (he AEA lsoloop HF Antenna You'll also receive these great prizes, , , A custom QSL order from Chester QSL Cards (a $250 value) Antenna Specialists glass mounted 2 meter antenna GGTE Mo rse Tutor software 1 MFJ _ A"•••".O__ OUTBACKERTM Chesler QSL Cards ... ... ." .." iJiJlt ~O'i£ 5111i0f\. • • Number 11 on your Feedbaek e.rd HAMS WITH CLASS Carole Perry WB2MGP Med,a Mentors. Inc. P.O. Box 131646 Staten Island NY 1031 J.{X)06 Lights , Camera, ATV One of the fun things about being an instructor at an amateur radio class is thet you c an never run out or eKciting and i nformat ive demonstrations to bring into the classroom , The " sparkle " component (see the October 1990 " Hams with Class ") of your program is what wIll have your sfudents remembering the course years alter they've completed it, SInce many youngsters today are o versti mu l at ed and underworked. they 've got to be approached with somethIng of cevcus benellf 10 them right off the bat. Remember always that the way the instructor presents the posed 10 amateur recc in a tun way . When the big day came . we _en 't disappointed. John WA2QVX, M,ke KB2EOO , Danny N2EHN , Lee WA2JWR , and 12-year'0Id Walter KB210Z provided us with an outstand· ing expenence. John, Mike, and Danny interacted with the children in a thoroughly professional and wen-cccrcrnated manner. Their own obvious enjoyment and expertise w;th this media came through loud and clear . Even passersby on the street were i mpressed WIth the way fhe 9Y8nt was being handled. Lee and Walter worked behind the scenes 10 make sure every· thmg went smoolhly. Ttle children not only learned about how enlOYable ATV can be, but also about how temfic it is that hams can rely on each other for help , resources. and tun . Pholo A John. Dan. and M,ke selting up the 'Ian w'th A TV equipment lor rhedemo at 1.5, #72 in Sialen Is/and. New York. topic is of critical importance. Children are the best at reacting to a reeceee's sense of excrtement. If you are genuinely enthusiastic about your presentatiOn , you'll have them et complete a"enhon, anlicipallOg somethIng spaC1a1. Don 't disappomt them , Hit them right up Iroot with what's m it for them. Recenfly , I set the slage lor a tlemonslrafiOn 01 arnateue TV at my school. The children in my 6th , 7th. aM 8th grade ham radio classes have often heard members of the Bayonne Emargency Management Amateur Radio Club on the air discussing ATV , They were lOOking forward to the morning when my fellow club members would be arriving to set up an ATV demonstrahan in our scnoor auditorium . Plenty o f Partieipaiion Filled WIth anhcipafoOn . my sfudents quickly spread the word 10 thelr other schoolmates and teachers , Before I knew II, I had several requests trcm o t her stall members to b ring Iheir classes 10 me audrtenum 10 see the eeecosuarco. Of course, 1 arranged for the additional sealing and enjoyed the idea of non-ham students being ex- 46 John and M,ke KB2GVJ , his son, submitted the following write-up 10 me , M,Ke is 14years-old . and he has been a ham for two years . He scves going along With h is dad and Ihe o thers wheneyer he can to help oemanstrale Photo B M,ke KB2EOO slands at the bacle of the class to walch the A TV demonslraliOn from lhe yjewpofnt 01 the kids . met them at the school at 8 a.m_ The camera equ lpmenl , a bas ic cemCOlder, was se' on a in front 01 the school. The anlenna was a simple 440 MH;r vertical. The outpu' of the camcorder was fed into a smaillo-wall A TV transmitl er, and we were ready 10 go! A mobile 4 40 MHz vertiea lanlenna was connected to the downcon verter inside the school aud'torium, and Ihe output WBS displayed on the school's large-screen TVsel. As the students watched live TV pictures transmmed via amareur radio, the club members eXplained howeasy il is to have fun WIth your own TV sla· llon. Imagine sharing live teley,sion pictures ali summer long with your friends allover town: doing homeworl< together on /WOoWay relevision : $haTIng videotapes 01 your vacaliOn: show ing each other your gifts during Ihe holiday vacation ; or pulling your parents . brolhers, sisters, and the family pet on your own TVsllow! During the demonstra tion, several people walking by on the seeer were put on Ielevision Most stopped to say hello to the students, and all were impressed with the iDea of pefSfJflallelevision. The next step was to put some teachers on the screen We asked one teacher. who teaches a drama class. 10 rooa come outside and become a star on amateur television. She sa w an immediate advantage in A TV lor hef stuaeots. Perhaps we have anolher prospective ham at 1.5. #72. Finally, we took several students outside and made them A TV stars, The creativity of the students came out in full torce. A group of Ihree stUdents said hello to their Classmates and told us what they would do with their own amateur TV station. Among the second group of student ATV stars was a budd'ng comic who made the auditorium laugh with his antlC$ and lunny faces. WIlen the beN rar>g, signalmg the end of the class period. many students were dlsappomted; they wanted more A TV action. Afler the demonstration, many students askecl lor information on how to get /heir own amateur radio license. Their teaChers expla'ned the school program. and the members of BEMARC promised to relurn lor ano ther te/evislon even/. When the BEMARC mobile TV cre w arrives al aclub meetmgsite. we usual . Iy park the van in a nearby parking lot or other interesting location. If poss ible. we park on a busy local street and capturepeopleshoppingandthe~­ fuI scenes in the sma" store windows. M,lee KB2EOO sets up inside the club. ATV. John An.ziv irw WAZQV X', Report A Ie!eVlSI(}{I appearance can bring OUI lhe ·'ham" in all of us Imagme whal fun It was lo lel agroupof61h, 7th, Bnd 8th grade students get into the ecliOn On OCtober 15 several members of the Bayonne Emergency Management Amateur Radio Club, BEMARC, demonstrated the A TV mode of ama· teor reao 10 Ihe stUdents of Staten Island Intermediate School #72. Six c lub members participated in lhe live TV demo, complete with a fully equ ipped moblle 'Ian and a sma /I dOwnoonverter connected to a large-screen TV ser in the schooIaud'lOfium. Preparation began early in the morni n g, when J ohn WA20YX , M,lee KB2EOO, and Danny N2EHN met for coffee nea r the school. The other two club participants, Lee WA2JWR and his 12-year-old son , Waller KB210Z. 73 Amateur Radio Today . February , 1991 Photo C. One of the children couldn 't reSist the opportun'ty to " ham it up" on TV. Some ham will know 01 another ham who is involved in ATV . You' ll probably be celigh ted wi th the response you gel. and Ihe help 01 local hams. contact our club president. our club has comple ted 14 demonslrations. 13 . Mike KB2EOO. PB2 eMS. We use HTs on simplex for audio betw66n the mobile van and the club meeting room. live more students had their programs changed SO ttlat they could be in the ham radio class.00. transceivers .9S SOURCE FOR ALL YOUR COMM UNICATION BATTERY REPLACE MENT NEEDS. Next we switch to live action and show all the outdoor scenes in the area..e.2v @ 500 MAH 10 .. I know you'll be delighled with the reec tion you'll get t-orn your audience 01 etucenrs.'S 132v 0600MAH $$4. & 23cm bands . PB·21 -$13. NYS reside nts add 814% sales lax . Add 70cm antenna.rss NEWICOM ' CONVERTIBLE BATTERY 8 Cells-Alkaline or NICAD Holder Complete with (8) Alkaline Batteries $26.8v @ 500 MAH SUPER 7S 13.. coax.'5 84v @ I 000MAH ICOM CHARGERS AVAILABLE MasterCard and Visa cards accepted .'5 8 .He shows al/ lhe equipment uS«! for A TV. Call or write now for ou r co mplete ATV catalog including downco nverters. Use any home TV camera or VCR by plugging the composite video and audio into the front VHS 10 pin or rearphono jacks. As a resuh 01the wonderful presentalion al our school. A Com ing Attract ion Any instructor who is search ing lor AMATEUR TELEVISION an innovalive and e~citing demon stra· tion lor the c:las. and antennas fo r the 70 . seen as well as heard .8 Vdc and TV set and you are on the air.W60RG With our all in one box Te70· . a TV ca mcorder. Shielded cabinet only 7x7x 2.. Designed and b u ilt in the USA Value + Quality from over 25years in ATV.SA."".4v @800 MA H $6 f. NOW YOU CAN BUY DIRECT FROM MANUEACTURER!. • r •• ~ '() . linear amps .2v@ 1200 MAH $63. Belore we complate our demonstration. Give il a Iry and let me know what results you gel. any club member who has a question for the oulsidtJ crew can see the mobile memo ber answering over the TV. 1991 47 . we usual.. runs o n 12·14 Vdc @ .it's that easy! TC70-1 has > 1 watt p. PBS 7. C O D P. N. Most schools and c:lubs today have access to standard video equipment.75 PB-26-$20. W. CUSTOM MADE BATTERY PACK" INSERTS Made to your Specifications. 'V9 received many comments about our A TV actIvity. Telex: 51060 16795 • FAX : (718) 461-1978 CIRCL E 19 1 ON READER SERVICE CARO 73 Amateur Radio Today .95 8S 96\1 @ 1200 MAH $59. The demonstration starts With the video tape transmitted from the cemcorder in tha mobi/a van. February.00 lCOM INSERTS BP-5-$23.. Add $3 . If you don't have the equipment yoursell righl now. PLEASE INQUIRE..25 MHz.2v 0 500MA H $$1. 70cm ATV Transceive r yo u ca n easily transmit and receive live actio n color and sound video just like broadcast TV . Iy ask some of the club members to come outside and we transmit their picture bacIc to the club. you can make your desire lor a cresemeucn be known to your local radio ctubs. & Canada Ca ll TOll Free (800) 221-0732 • IN NYS (718) 961-2103 .S. with one xta l on 439. SEND FOR FREE CATALOG AN D PRICE U ST WORLD WIDE DISTRIBUTORSHIPS AVAILABLE... 11354 MADE IN THE U. SInce December 1989.5-. iii SMILE! YOU'RE ON TV ~ On~ $329 • '"* '.45. BP-7 BP-8 13. $64 . 33. Vis a. ELECTRONICS 2522 Paxson In Arcad ia CA 91006 BATTERIES IIR" US • • • You've bought our replacement batteries before .0 or 426. In U.. (8 18 ) 4 4 7 · 4 5 65 m-f 8am-5:30pm psi .25.S . and you would /ike the BEMARC A TV road show.. and several more hBms hBvepurchased A TV equipment in our area. MC.00 BP-3--$17. a monitor.sroom should consider an ATV event. INTRODUCTORY OFFER! KENWOOD fNSERTS PB-25-$20.50 tor poslage and handling. ThankS 10 the generosity 01 AEA and Mike l amb. Amateur TV is a fun way 10 mot ivate prospective hams and to capture people 's anention . Flushing. an antenna. . we expect 10 be on the air. W & W ASSOCIATES 29-1 1 Parsons Boulevard.A. This way. I certa inly became oonvi nced 01 the value 01 adding ATV to my curriculum. Only a l ew week s after the initial ATV demo. and removes the covers on the units to exp ain the function of each . If your Club is located in the New York City/Northern New Jersey area. A basic ATV ste tce coosists simply 01an ATV l ransceiver.C.95 (base charge on(y_1· long er) .. Trans mitters sold only to licens ed amateurs. 434. and hot GaAsfet downconverter tunes w ho le 420-450 MHz band down to cha. us. 00 ICOM CM2. ver ified in the latest Callbaok or w it h copy of license sent w ith order.Y. and a VCR. Full duplex is possible in that manner. very soon. our school is well on its way to having its own TV stat en .. for legal purposes.p. (See " The Wo rld of X-Band" by Bill Hoisington KICLL. but microwaves do not know that. I placed the molds on a level surface with their smooth cast surfaces up. A microwave lens with an index of refraction of 1. I mixed the hobby casting resin using the least amount of catalyst re commended .5 minus I . or one twentieth wave. After all.. I needed two antennas . March 1975 . 73 .) A strip of plastic electrical tape was used to form a straight wall lip at the top of each mold. The screws are there to plug existing threaded holes in the rings. (See Figure 2. Bill Hoisington KICLL described a simple X-band (10 GHz) crystal set using a IN 23detector and a hemisphere of wax as the antenna . but reduces the Figure 4. It turns out that optical lenses above 3 GHz actually help correct aberrations in the wavefront coming out of a hom antenna. It has a focal length of about 6 inches. (See Figure 1.) Next. I made two molds 10 have added assurance against having to throw our the mixed resin if I dropped or chipped a mold after the resin was mixed. but will opt for an already -built one any chance I get-e-I'm basically lazy. So. The wax is very clear to microwave energy.. A lens collects and collimates the energy coming out of the hom which results in an increase in gain. '-.-ao ><- Figure 5.) Once the plaster had hardened . and it's quite easy . So. The majority of d ish and hom antennas used by amateurs fall into the fou nd or purchased category . Then. about I Yz inches thick. They have no other real function.) Several years ago I came across a large glass lens at an antique flea market . curved surface down. Also. If I had not had the rings . However.. but I can relate some personal e xperience in casting lenses. Completed antenna mounted in a 6-inch cebe urility box. Few of us actually build them. Then I poured the second mold and let it harden. I removed the tape. (If the molds are notlevel. na. As long as the imperfections arc less than an e ighth wavelength (0 . I} IL FElT TIP "E" Figure 3. and taped it to the second ring. 73.. I placed the glass lens on the fi rst ring. so it is known as a "planoconvex . February. Figure 2. as special needs arose. Some time ago.142 inches). it was time to cast the lenses. . It is 6 inches in diameter. Cast lens epoxied to acrylic suppon plate. Forming th~ plaster mold. DesiRninR a nd BuildinRthe Lens I can' t go into detailed lens design.Number 12 01'1 your Feed back eer d Pour an Antenna for X-Band 20-20 vision for your microwave system! by Joh n M. and quite heavy. I've been keeping it for use as anoptical receiver anten- 48 73AmateurRadio Today . This lengthens the curing time. but irs a great light collector. One mold would have been sufficient. then taped the glass to the metal edge with plastic electri cal tape. (I let both plaster castings dry thoroughly for two days before doing any more work. Marking the cast lens for edging. the distortion is less than the physical defect . a tenth-wave bump or dent produces a fifth-wave distortion in the wavefront. In other words. separated the glass lens from the first ring. the rear surfaces ofthe lenses will be wedged. the lens surface does not have to be optically smooth. For example . September 1983. What I am referring to is casting lensesmicrowave lenses . I could have made suitable rings or sleeves by forming strips of aluminum flashing into a band and taping it to hold its shape. we designed and constructed custom antennas.) In Photo A you can see several screws protruding through the sides of the brass rings into the plaster.1. there should not be any noticeable effects . (See "The Amazing Cylindrabola" by John M. 1991 Figure J." Such a large fat lens is poor for optical imaging. thereby reducing sidelobes. Paraffin is not optically transparent. Casting th~ replica lens. ) He cast ordi nary kitch en paraffin to make several short focal length lenses about O. but they may be helpful in holding the ring and plaster mold together. poured it into the mold. I have built a couple of special purpose dishes. Note that the marking sleeve or cylinder mus' be perpendicular to this rear surface oj the lens . and let it harden for several hours .7cm in diameter. The lens is flat on one surface and convex on the other. l decided to try to cast epoxy resin replicas of the glass lens. fonning a watertight seal. but I wanted to mix the epoxy resin only once . Once the plaster had dried. A surface error on a reflector is doubled upon reflection. Lenses are much more tolerant of surface errors than are reflector or " dish" antennas. In my j unk box I found a couple of brass rings 6 inches in diameter and 2 inches tall . . Franke WA4WDL E ver heard o f anyone pouring an antenna? This idea isn't as silly as it soards. Franke WA4WD L.64cm and 12.5 and having a tenth-wave bump or dent produces a wavefront distortion of one-tenth times 1.. I mixed plaster. most of us started in microwa ves by using dish or hom anten nas we found through surplus sales or hamfesrs. T• • .&74 Midd leto w n. or User • CF-41601 CF-4160K Duplexer w/o Ieex POWER: Same as (f·416 CONNECTOR OUTPUT: UHf 146MKIINPUJ: UHF I MOD£l 446 INPUT: N-typt I MODEl 446 INI'UT: UHf IX'fined Fiel d s.o ~ .&9S-S0&6 '" 1'rof". software. $ 5 Shipping: FOB Concord.Sea rch and So rt on Call Sign. MUCII MO RE!!! Just 559. -I BM Compa tible . ADVANCED FEATURES: Tuning Oscilloscope Digital Waveform Presentation Auto Calibration and Code Recogn ition Continousry Tunable Filter Frequencies Variable Shift Adjustable CW Filter Sensitivity Farnsworth Code Compatibility Unanended Capture and Printing Software Systems Consulting 150 Avendia Cabrillo "C" San Clemenle. State.Use r Ccnhg urable.atistics. Date Prefix. .1 50ft". This hig h q ual ity . CQ Zo ne.~ Rn. SELCAL (Selective calling tr ansmissions).. r.. RD Now K IEA Compatible! . instructions and frequency lists needed to allow you to receive a vast variety of d igital broadcasts transmitted over shortwave rad io with any IBM PC or Compatible computer.. fot Tlr. R. Mass .S.25 or 3. . The product ccn.. Mass. and NAVTEX. rwy 077. Prices subject to change without notice.. Cou n try.".95 (Plus 5HI0 P & HI Comp lete.o r.. • SPECTRUM INTERNATIONAL.o NCG Companies FREE D EM O DISK n_l_ fol.1691 MHz Weather Satellite System Spectrum International . is pleased to announce their appoi ntme nt as North American and Inte rnation al d istributor of Time-Step Electronic 's Weather Satellite Receiving System. Radio Teletype.Au lo QSO Alert Ind icato r. »Auto Beam Headi ngs . U. Prl'fi\ .oIU.. Q SL Ca rds... ~ 1>Odldk s.~ ".PC VGA compatible) of sig nals recorded from PC-SAT system .-. . .00 A Complete Digital Reception System PC SWL co ntains the hardware. PhOne: (508) 263-2145 CIRClE 18:1 ON READER SEItVIC£ CARD PCSWL $99. dio ..lng Software 80 Page Tutorial Reference Manual World Pres.n. .usts of : Demodulator Otglta' Signal Proc.md Zone Selections. model 1691-coax ass'y 1691 MHz Loop-Vagi Antenna mocIel1691 -LV(N) 1691 MHz Loop-Vagi Extension model 1691-LV-XTN $ 45 $ 92 $ 75 PC-SAT System (all the above items) $1100 Demonstrahon Disc (18M.Dudl Clock C al enda r.t Tutorial Audio Ca••ette with samples PC $WL aut omatically decodes Morse code. . CA 92672 (714) 498-5784 CiRCLE 244 0 " READER SERVICE C. low cost system consists of: 169 1 MHz GaAs FET Pre-ampl.5) to : Se nsib le Solu ti o ns 1'.0. UH f Send Call and Disk Size (. !.Auto Country. "' CIRCLE 95 0" READER SERVICE CARD 1215 Norrlt Grove Street Anoheim. . e f'rmt Log Sh ee IS. Post Office Box 1084·S Concord. New J.g COde) . 80". CA 92806 • (714) 630-4S41/FAJI (114) 630-1024 CIRCLE 237 0" READER SERVICE CARD .INC .Un p.llie lled Log St.. FEe (forward Error Correctir. 169 1 MHz Receiver Decoder Board & Software model TS·1691 . lTU Zone.AND ~LJC H . 30 Day Money Back G u ara n tee Call For Your Nearest Dealer Or Catalog 1 [BOO) 962-2611 • co.A.u. Inc. . a nd QSL Labels .Amp model TS-1691-Recvr model TS-VGA-SAT3 $ 175 $ 450 $ 300 Al so available to complete the syste m are: Low Loss (microwave) Coaxial Cable (65ft) with connectors .u.I. Frequency U.&8 (201l.W>lf. 01742..P . As long as you use the same antenna as a refere nce. you can set up a test range in a shon having a focal ratio (or F#) of about di st an.. light sanding of each lens. and he now has a superb unit that can be readily mounted on a tripod diode units . like me . is over 40 yea rs old and still was ab le to mount the lenses on one face of a working. I epoxied a 5 1f. After the edging. frosted appearance . lenses are mounted in a finely-ma chined barrel with a threaded reta ining ring .5 = -4 . February. unless their surfaces rece ive a ground scattering finish. Fi rst. 73 .5 dB greater than the reference . The addition of th e used a surplus 2K25 klystron that had its ca vity stretched to operate epoxy lens increased the gain by 4 . Putting your test antenna on the receiving setup. mounted hom and complete alltell/la. His circu it is very com pact and horn with a spacer on the opposite face of the diode lately? I would very much like to hear from anyone with a supply of Solfan Gunn box . they look better with an even. Then I set the Svmeter to midscale ing. 16 . I now use a circuit pub lished by Chuck Houghto n WB6IGP.4 GHz .) fest many years ago. Cast lens epoxied to acrvlic plate ami lens mounting plate. The molds survived and could be used again . a d istance of 20 feet is one I had at the time -a Microwave more than adequate . or a factor of 2.5 dB less than the reference. with a I .. the attcnuator is changed to maintain a midscale meter deflection. (See Figure 3. With a o n 10. You do not need to know the absolute gain of an antenna to use this technique. Mounted lens.inc h acrylic to the flat surface of each of the epoxy lenses . Anyway. 5 = 19. I have to reverse the polarity of the detector that. I Associates metalized plastic 17 dB gain horn . so I decided to trim or " edge" the lenses. You cannot go wrong read ing his many ankles.-e . The refere nce reading is subtracted from the new set ting . 201 ." in 73 every klystron power su pply thaI I got at a ha mmonth . you find that the lest antenna has a ga in 3 . The lenses . we are more interested in reducing losses or improving gains Tl'Stin~ the Lens than we are in knowing what the One nice thing abo ut small ape rabsol ute leve ls are. probably due to a 6-inch cube steel utility box and mou nt the misprint. Original glass lens ami plaster mold. October 1988) I did ence reading.8 . tor changed to a setti ng of 12 dB.4 . subtr acting the refere nce reading (1 2 .8.5 dBlIellsyou thatthetest antenna has a gain of 4 . you get a midscale meter defl ection with the ancouaPhoto A.) People may shun vacuum usable sepa ration to be increased tubes. chances of uneven cu ring and cracking due to rapid heat bui ldup. The curing site shou ld be outside to eliminate any problems with the smel ly fumes .5 dB . (Sec F igure 5 . (See Figure 4 . although the lenses are of poor optical qua lity. If the midscale deflection had required an anenuator setting o f 4 dB for the test antenna. After all.) Then I drilled four mounting holes in each acrylic square . You have to atte nuate the signal from the test antenna to make it equal to the reference signal. Besides. the receiver setup.5 = 11. For e xample. the 2K25 puts out for field work. I can operate a lathe and chase threads.5 dB). The receiving portion I am now looking for a larger lens to cast. Substituting other antennas on 23693. Apt. then subtracting the reference reading (48. (See " A Complete X-Band Transmitter" by Stirling unit at each end of a path.4. tor and a tunab le detector mount. or on a tower for po int-toabout 25mW when used with an old surplus column. "Above and Beyond . August system gain is 9 dB. Houghton WB6IG P. The ga in ofthe test antenna is the difference added to the gain of the reference ante nna (16 + 3. 1991 . Franke WA4WDL at 23 by adjusti ng the variable encnuarc r.5dB. SO 73 Amateur Radio Today . allowing the Phoro C. should be fed with some son of small hom antenna . the net M. Next .5 = 3. finished the lenses. Olberg WISNN . but let's be reasonable ! Instead. followed by a cou ple of coats of clear acrylic spray. ea sy-to-handle very sensit ive. ture mic rowave antennas is that Back to the lenses . The atParkwood Drive. I poured the resin and allowed it to cure overnight. 73 . The edges of the lenses were rough and chipped.5 dB . ) T he act ual edgi ng was do ne with a dis k sander and only too k a couple of minutes for each lens . the next tas k was to mount the lenses . The result is added to the gain of the refere nce antenna to yield the gain of the new antenna. 1978 . (See " Microwave Test Contact John M.5 dB). The next day.r· inc h -s q ua re piece of l. have you pr iced a Gunn diode 10 get it to work . Then. The result is a compact. po int applications. they can still produce a very hot spot w hen aimed at the sun. iii response . you ca n measure the relative gain of your other ante nnas to it. I used a cy linder with an outside d iameter of 5 inches-the hood from an old oscilloscope-to mark the lenses.8 for equal signal strength. Fo r meterand tuned the detector mount for maximum mold . I placed a sta ndard ga in horn on both the of my antenna ra nge is a 0-40 dB ancnuuor perhaps I can find a large bowl 10 serve as a transmitter sou rce and the rece iving setup . Sound more complicated than it actually is? Say you have a reference antenna of 16 dB gai n and with it you get a reference enenuator setting (reference reading for midscale meter deflection) of 8. For a source. or a net gain of Photo B. I used the on ly small horn source antenna and the cast lenses. bu t I can only respect a tube by 2. Yorktown VA renuator setting at this point became my referEqu ipment for 10 G Hz " by Chuck L. Normally. I separated the cast lenses from their molds . The sanding is for two reasons. Second. MA 0 1930 Or charge by phone (508) 281 8892 CtACLE aD Ofrl MADER SERVICE CAlif) $249 Li" Smith Design Dresher.. 1960 through last year is ava ilable . . Gloucester. ... MAX22O. You can have access to the treasures of 73 without several hundred pounds of bulk y back issues .ornj::llele .-r 'Lew ColI DTMF "".04 7 il F capacitor across the scope input will reduce the noise bandwidth. Specify MAX146.tl l CIRCLE 2U O"l READER SERVICE CARD The Best Value----. A swept generator can be used . This is the most accurate .. Our 24)( fiche have 98 pages each and will lit in a card file on your desk .FCC & DOC lype-. BUCKMASTER PUBLISHING " Whitehall " Route 3. ~I2 . but essentially constant. !../ DIV ... Money back guarantee.e. Vol Fife.i.95 f:'~ 100 .S It<l O~ E L"NIT . Vi ewi ng w ith a medium sensitivity logarithmic system. PORTABlE READY-To-GO· Pre-assembied & pre-hJn9d .type 1200MHz INPUT: N·type . PA 19025 4%MHz 500 lfalh J100Mfu: 2l1l1 wul11 CONNECTOR OUTPUT: N·lype 146MHIINPUT: UHf 44bMHI INPUT: H. . MOOoIe ShOe '-lounl & ~ CatIle '~ S1 all(Jtl P S MoboIe Ant_ eIC . I designed my own (fig.3 0d B m/7m v signal generator and this CAL atso plotted in fig . 11 r:. -- POWER: Sene Q'i CFl-431 CONNECtOR 0IJTPtR: N-IfpI~""'. CA 91806 (714) 630·45411fAX (714)630-7014 L-=-_-=:-=-====-== • ClRCU 54 O"l READER Sf:RVICE CARD ....pt .llld I .ctron . CIRClE 85 O"lIiEADER Sf:ltVICE CAlif) 0 . 11 ) using the emitter-base diode of the " nois ie st " (but c o ns ta nt with frequency) transistor I could find . libraries have these readers . Police . such as the 107 Spectru m Probe ' or spectrum analyzer. Ann ual updates available for $1 0 .\lATEl:R BA. is needed . flOCk Dealer Inqu""'S Inv. Your fu ll satis faction is guaran teed or your money bac k . PACKET RADIO .DEPENDABLE · WalEll' & corrosion-proof · PROVEN DESIGNFrom AAAl HarxIxx>k.480 mHz ·99 ChaMeIs . • lOdS per Gard~n Gro.282-5628 CIRCLE 16 8 ON READER SERVICE C"RO WHEN DOESO:-iE EQUAL TWO? FIG. The diode is reverse biased to break down ..". T his is connected to a high-gain wide-band amplifier. highest qlty.. but it is v e ry s lo w especially if band changes and leveling must be adjusted ...\IERCI.S( . RUGGED.. 12 ShOY 3 the noi se ou tput."lD. I AXM I ncorporatf'd Z 11791 Loan.•• i .:.... Need Anothe r NOISE SOURCE? 11 is often desirable to see the performance of RF devi ces over a large frequency ran ge .. using the coaxa t adapter and sui ta b le termn . etc • Fuly Field Pfogtllllmable ' M\IIb F_liof'l LCDdlspllly ' Freq. CA 92b40-2. The noise g enerator is re placed b y a ..' 140MHzINPUT: UHF 446MHI INPUT: UHf 1200AVttINPUT: K-Iype Call For Your Nearest Cealer Or Catalog "".\I.. (no partial setsr for $250 plus $ 5 for shipping (USA) .. The collection 01 over 600 microfiche... B'casl RPU.1M. EMT.EVERY ISSUE of 73 on microfiche! The entire ru n 01 13 from October . The small variatio n between noise and CAL ind ic ate s a nearl y c o nsta n t n o i se leve l.. and a desk model tor $ 220.. \\lIE" IT'SATAD~1 8 FM TRA"SCEIYER CO.ency Range 1 38. Visa/Me accepted .-e_ An inexpensive solution is use 01 a noise source w hich generate s a med ium. Box 56 Mineral. level of no ise over the freq uency range of interest.v freq uency 100MHz: aCf The Spectrum Probe ' display of fig . with the current adjusted for maximum noise. 1 [BOO] 962-2611 NCG Componies 1324 (215)643-6340 ' 00 1215 HOfth Groote Sneet Dt-u/t'r 's '"l/uiry mvlted.OMC-VISA ~ ( MAo add 5"" ' " ~ SCnd payment to Cellular &'CUllty Group. 4 Gernng Ad . _ • CFX-4310 Triplexer WID(oax I coverts your scope into a 100MHz spectrum analyzer MAX System'M GROUND PLANE ANTENNAS CK-f.U &: A. maIDfiaIs a"ld wor1un<nship. but viewing is difficult unless the generator frequenc y is lo cked t o t he sp ect ru m a n alyz e r frequency. Only $29. is avai lable as an entire set . True MlWaftP. • E~ R"9\l8d • oYemoghI Shippftg A.17 ~ 01 ~:J0. Find ing a signal source is the other problem .bIlI ' Snipped l. 12. Virgi nia 23 11 7 703-894-5777 800.. R£PfATfRS . A 0 .Stainess steel & ightNl.. We ot ter a ba ttery opera ted hand held viewer lor $75.. or MAXoWO $ . . Triplexer w/(oox POWER: 146MHl 800 WttItI. t . kI&aI to< MARS. A signal generator c an be manually varied over the range... Hi-Spec would be a good place 10 stan! A full iinc of cavity amplifiers is available for 902. and he' s got quite an assonment of hard-to-find com - . Xenia OH 45385 (513)426-8600 A source of hard-to-find chip caps. then where? Price list available . PHEW! If you can't find it here. Up to 200 walls out can be obtained on 903 and 1296 . and all ar prices that won 'I brea k the bank! Most of these dealers will supply you with a catalog upon request. 1296 and 23Q. isolators. They're good for a variety of applicat ions as low-level drivers or fi nal stages.· PO Box 387 Jupiter FL 33468 (407) 746-503 1 If you're ready to add a bit of power to your microwave signal. and offers a line of custom-buill amplifiers to cover the spectrum from 902 to 2304 MHz. IIi-Spec Compan". Price list available . frontier Microwave RDI. and in addition to loop yagi kits for 903 . Gun n diodes and Gunn oscillators. Catalog available . Ta ke a careful look. you won't be after reading throu gh this compilat io n o f microwave sou rces . Down East Micm\u\·e Box 2310 RRI Troy ME 04987 (207) 948-3741 VISA/MC accepted Home of the famous' ' joopers"! Bill Olson W3HQT is the proprietor. the proprietors arc also amateu rs. to help get your next project w iling. He also builds low-noise preamplifi ers for 902 and 1296. he manufactures a line of linear solidstate amplifiers for 903 and 1296. Or even an antenna a rray. ARR also sells the TR IOGA Gunnple xer/Transceiver co mbinatio n for wideband 10 GHz FM work as well as the T R24GA system for 24 GHz . C ommu nica tions Co nce pts. There are some really neat items available . active in a wide va riety of microwave operations. Inc. . Bob N5KET and Alan Dickinson N5BHX have accumu lated a huge quant ity of surplus 52 73AmateurRadio Today . Catalog available . and makes a nice sequencing board for mastmounted types . Advanced Receiver Resea rch PO Box 1242 Burlington CT 060 13 (203) 582-9409 VISA/MC accepted Jay Rusgrcve W IVD has been building some beautiful preamplifiers ove r the years. Price list available . Hilton NY 14468-9535 (716) 392-9430 A lineup of kits and modules for VHF and UHF including 900 MHz.. Low noise preamps and kits are available for 432 MHz through 10 GHz. Distributor Specialists 1942 14th Street Santa Monica CA 90404 (213) 452 -3445 Distributor Specialists carry a fu ll line of high-power relays including Dow-Key Type 60 and 260 series and Marshall CX500 series. using a common high voltage supply (yours or theirs). So . . He also can design prototype specialt y microwave items for your specific needs. February. without further delay . Dave Mascaro WA3JUF has been building solid-state gain blocks for qu ite some time.. While this list is by no means exhaustive . Down East carries the SHF Systems series of transve rtc rs for 902 through 5760 MHz. by Pete Putman KT2B E vcr wondered where to find chip capacitors? Low loss microwave relays? Power di viders? Isolators? Schottky d iodes? Or perhaps you need a medium-power gain block to drive the high power amplifier you also need ! Or lubes for it. Microwave Compo nents or l\tichi~an PO Box 1697 Taylor MI 48180 (313) 753-4581 evenings Another regular visitor to Dayton! Nonn Alred WA8EUU is the proprietor. with up to 100 wau s available on 2304 . Power levels range from 3 to 70 watts output. Stymied? Hopefully . and 2304 MHz. Inc. Hermromcs.. it IS extensive and represents bu sinesses from all over the US a nd Canada . Each is listed with a brief descr iption of the procucn sj sold and any observations I have from past dealings . A line of microwave preamps is in the works . PLUDRO oscillators . ranging from power amplifie rs. 1991 microwave equipment. Buffalo NY 14206 (7 16) 852-37 11 Contact Ed Emieh KB2KHK for waveguide and 10GHz frequency meters.a potent punch. Rob Scyd ler Rt. I' ve spe nt a good deal of time rooting out sources for anything from ATe chips to Zcmarc h devices . 508 Millstone Dr. RF power transistors. Price list availab le. And you can now gang 'em up with the HiSpec line of modular RF decks. In most cases. Catalog available.• Numbe r 13 on yo ur Feedbeck card The Micro w a v e Director y Where to find a wide range of goodies for operation at 902 MHz and above.1 MHz. 2 Box 2170 Boerne TX 78006 (512 ) 650-300 1 Days: (5 12) 249-2 152 Eves . EM COl\llndustries Ed Emich 10 Howard St. . 1296. In addition . Box 467 Otisville PA 18942 (215) 795-2648 Eves.. 65 Moul Rd . Catalog available . complete transceivers and components. High quality and economical GaAsFET preamp kits from 10m through 7Ocm. with power levels from 10 mW to 50 watts . and kits for VHF and UHF. but items in Catalog #5 of inte res t 10 microwave fan s incl ude feedthrough capacito rs.3664 VISA/ MC/AMEX accepted The ca talog alone is worth an inquiry ! Surplus Sales is a familia r face to Dayton at tendees and has an incredible range of new and used pans for sale. A lso they offer 900 and 1296 M Hz 2-way power splitte rs . SSB Electronics USA 124 Cherrywood Dr . He will contin ue service and repai r for any of the units out in the field. ' B' Pantego Tx 760 13 (8 17) 86 1-5864 Steve Frankli n WB5K GL has de signed a series of AM a nd FM ATV transmitter a nd receive modules (along with a video control ce nte r) fo r the 7Ocm.. 10m to 2m o r 220M Hz tra nsvcrtcrs a re available as well. 902 and 1296 MHz. (20 1) 996-3584 after 9 p. Mountaintop PA 18707 (7 17) 868 ~5 643 M-F after 6 :30 p. attenuato rs. Price list availabl e . 1296 and 2304 MHz. Catalog available. ch ip resistors. The RF Cc nnectlon 2 13 N .s oclates 2 10 Utica SI. A mode S receive convener is available as well . Aurora. RF co nnecto rs . Price list available.n. coaxial relays .. UHF and micro wave pa rts . (800) 854 -1927 order line All kind s of RF power transistors a nd pa rts fo r V H F and beyo nd . Tonawanda N Y 14150 (716) 692-545 1 Preamps and power a mplifiers fo r 2m up to 1. He also offers a wide ra nge of eq uipment for GOES weathe r satellite reception on 1691 MHz includi ng a comp lete high q uality syste m.S .m .2 145 Fo r years John Beanland G3 BVU/W 1 has ca rried the fine line of M icrowave Modules transverters and co nve rte rs .. PC Electronics 2522 Paxson Lane Arcadia CA 91007 (8 18) 447-4565 VISA/MC accepted Alway s wanted to be T V . These sho uld be great performers on the amateur microwave bands a nd come in sizes ra nging from 2 feet to 6 fee l. Box 178 Somis CA 93066 (805)482-0320 (Answering machine duri ng daytime o r contact d irectly afte r 7 pm Joh n Kitchens NS6X offe rs a selection of surplus VHF . The Antenna Center 505 Oak St.m . Altho ugh M icrowave Mod ules no longer supply the ham market. A 4O-page catalog is available for 85 cents worth of stamps . VIIF Communications 280 Tiffany Ave . Po we r mod u le s (bricks) fo r a variety of bands and input power are available 10 help s implify amplifier projects . ~lountaintop P. Catalog available. SIn' Microwave Parts Co. 85 Ma ry St. Specialty Prod ucts Oil' . (And I'm only up to page 2P!) T. Canada LAG 3G9 (416) 841-0624 In the U . he still has some 1296 transverter boards available . horn s and waveguide are amo ng some o f his offe rings .O. Sinclabs Inc. Nann also builds some nice low-noise preamps from 6m to 1296 MHz. 1991 53 . TE SJstems P . Price list available . Look for more inte resting transverte r packages in the coming yea r. Surplus Sales of Nebraska 1315 Jones Street OmahaNE68 102 (402) 346-4750 or (402) 346-2939FAX Compuserve 76357. Catalog available .2 G Hz . includ ing Dayton . 7289/3CX 100 tubes. Also a line of preamps for EME . coaxial cable. connectors a nd Teflon" PC board mate rial.2 G Hz. microwave diodes.1304 9 a. 900 MHz and 1. Calumet M1 499 13 (906) 337-5062 A good so urce of high qu ality spun dishes specifically designed for high accuracy at the 12 GHz Ku satellite ba nd. Pri ce list available. Receive convene rs are also available. February. GaAsFET devices. Joel Knoblock probably has " it" some whe re in his vast inventory of co nnectors . Frederick Avenue #11 Gaithersburg MD 20877 (301) 840-5477 (800) 783-2666 orders VISA/MC accepted If it has anything to do with a connector . Bricks and exciters for 70 em.O. Co m illun/ 011 pugt' 55 73AmaleurRadio Today . 7289 or 78 15 tube . Jamesto wn NY 1470 1 (7 16) 664. RF Parts 1320 G rand Ave nue San Ma rcos CA 92069 (6 19) 744-0728 . Price list available . Steve Kostrc Box 34 IA ROI Frenchtown NJ 08825 (201) 834. Catalog available .ponenrs. Box 25845 Los Angeles CA 90025 (2 13) 478-059 1 A se ries of medium 10 high-power amplifiers for the 144. Steve also sells a line of GaAsFET kits based on the WB5 LUA des igns for 902 . Joel is a regular at majo r hamfests. Any time on weekends. Steve N2C EI is another " pertsmonger" a nd at hemfests he sets out a tray of components that looks good enoug h to eat. John carries a lineup of loop yagis for 1268 . Spectrum International P . a nd you ca n even buy the boards to " roll your own" ATV station. 900 and 1200 MHz bands.m. Tonawanda NY 14150 (7 16) 835-8530 For those high-powe r enthusiasts. adapters. OSCA R and wea k-signa l work both mast-mounted or in the shac k. ATV c ha nnel filters are availab le designed for specific freque ncies. 500S La Po rte IN 46350 Alan Rutz WA9GKA ca rries a smorgasbord of eq u ipme nt for 10 GH z ex perimenters. He sti ll has some o f the popular Tonna a nte nna line in stock . Sate llite C it)· 2663 County Road I Moundsville M N (612) 786-4475 (800) 426-2891 An economical source of 1 8 ~ and 24 ~ dis h a ntennas as well as Gu nnplexers and associated eq uipment. Box 1084-S Conco rd MA 0 1742 (508) 263. Catalog available .t Ccesr Amateur Radio 496 McCo nkey Dr. They also have some real deals on used satel lite equipment for FM ATV experi ment s. Amplifiers a nd antennas round out the equipme nt list. Gunnplexers. The 2· and 3-foot models are UPS shippable . hel ical filters. and power modules. MMICs .. Sinclabs produce a nice series of water cooling j ackets which mount o n a 2C39. eh? Tom W60RG and Mary ann WB6YSS O ' Hara can satisfy you r craving with a full line of ATV transmitters and accessories fo r 7Ocm. He also has M Al COM 10 GHz Gunnplexer systerns as well as sideband units for 10 GHz. 1296and 1691 MHz as well as a series of high quality interdigital band filters from 420 M Hz up to 1691 M Hz . Gunn diode so urces.6345 (800) 752 -88 13 orders only VISA/MCIDISCOVER accepted A source of Ha mtronics kits . Check out their 100 wall amp for 1200-1300 MHz . co ntact : Ea. Specialty tubes can be had as well .7 p. It would be imposs ible to list them all .m. switches and relays. 432 and 1296 MHz bands co mple te with built-in GaAsFET preamps. You 'll find all ki nd s o f bipol ar a nd GaAsFET devices available as well as MWA a nd Avantck MMICs. and has even come out with his own " ho use brand " type 991 3 coax . Gerry K3MKZ carries the high quality SSB Electronics se ries of transverte rs from 6 m all the way up to 10 GHz. They are designed fo r mast mounting to eliminate fecd line losses. HP-5082 diodes.O. Ontario .. 7 102 W . chip components. Catalog available . Systems 2420 Supe rio r Dr. such as c hip and lead less capacitors .. Catalog available. piston tri mme rs and S MA connectors as we ll as a lineup o f Mitsu bishi power modules.. psn Pauldon A. This provides for better regulation and no voltage drop at the filamen ts under full load . both of which are machine fabricated of brass then silver-plated. The Commander II comes wired for 110 VAC. Input and Output Circuits The input circuit is a high a-tuned type which provides excellent linearity and low 8WR for the exciter. most 01its weight due 10 the heavy duty transformer used for the 2SQO. and AF chokes are in series with the supply voltages. 28 pounds worth . ~ heliax for the output. though very manageable thanks to the 6:1 vernier gear drive connected to it. Operating the Commander II The operation of the Commander II is very easy. The front of the Commander fl. and there is no problem w ith arc-over since the capacitor is rated at 2-26 pF at 10. High Street Photo B. and definitely needed to keep the voltage drop down on the primary supply at full outp ut. gives the two-minute time delay needed for the c athode of the tube to warm up before operation can begin. are also a part of this board. It sends 900 vol ts AC to a voltage doubler that generates about 2500 vol ts DC with 27 . but it won't knock your ears off while running (see Photo 5). wh ich 54 73AmafeurRadio Today . it meets a " T " connector. grid current. which I did. RFFlow As the RF leaves the output circuit through the 80-239 connector. T a single 3CX-8OQA7 in a groundad-grid configuration. The regulated 12 volts for relay control. I found the tuning to be sharp . and I notic ed better regulation as a re sult. The amplifier can also be wired for 220 VAC. high voltage supply and tz-vcu control voltages. A single meter switched in and out using a multiple pole switch mounted with a small PC board 00 the back. manufactured by Command Technologies. a quiet fan keeps things cool. plate current. is a 2 meter operator's dream come true. one side having a quarter-wave shoned stub and the other side having a piece of V. Covelli lVASSAl The Commander II Amplifier For more fun on 2 meters. The tuning capacitor and loading capacitor are connected to 6:1 vernier gear drives for smooth tuning. The filament tran sformer is not part of th e high Voltage tr ansformer. The high vol tage transformer is large and heavy . Teflon'" is used for the dielectric. the meter's lamp lights up and high voltage is present on the plate of the tube. High vol tage enters the plate circuit th rough a mil-spec "MHV" connec tor similar to a BNC. The control board. The green lamp wi ll come on when the two-minute . running in class AB2. provides plale voltage.005 IJF capacitor at 5 kV . This was a pleasant surprise. 5O-watt resistor in series with the high voltage lead limits the current in the event of a shan or flashover in the tube. It uses is comforting since the amplifier can put oul almost 1000 watt s SSB w ith 25 watts 01 drive! And ailihis high power is in a compact.Number 14 on your Feed back C8rd 73 Review by Jeffrey J . ground the piston. Under the cover. The entire RF section uses machine screws and lock-washers to provide excellent RF shielding and groonding. The layout of the amplifier is straighUorward and clean. there is plenty of air output during operation. The blower is a 50 cfm Dayton squirrel-cage type . The filament supply is bypassed at the inp ut termi- PO Box 939 see " Price Class" above). which give while turning on a screw-type shaft. which is attached to the Dow-Key 26O-B RF relay (the relay is optional . wh ich moves plenty of ai r around the tube. (419) 636-0443 Price Class: $ 1388 wIDow-Key 260-8. The out pu t c ircuit uses a quarter-wave stripline design with a h igh Opiston-type plate tuning capacitor. Typical RF Output Ratings tor the Commander II Watts Drive Watts Out 5 120 320 10 15 450 25 700 With all this attention to a highly efficient RF section.. Bypassing is done at the connector with a 0. and a zener diode for proper class AB2 bias. and most imponantly. Command Technologies. lne . 450-voh capacitors.000 volts. The blower output to the tube is shielded by a stamped-out top cover plate with enough surface area to keep the RF inside. where is the power supply? It's in the same compact cabinet as the RF section. and an open-air type RF plate choke in series with the high voltage lead is attached to the tube by a collar wrapped around the plate . mounted on lOP of the high vonaae board. The Power Supply PhOfO A. This tuning capacitor moves in and out of a fixed cylinder attached to the stripline. Price Class: $1140 w/o 260-B. When you turn on the amplifier to warm it up. February. 1117 W . The lube itself is c apable 01 800 watts plate dissipation. A 5O-ohm. with a large sevenfoot '14-3 conductor AC cord.51JF 01 filtering using eight 220 IJF. selfcontained tabre-top unit (see Photo A). but completely separate from it . The final amplifier section is in a completely RF-tight enclosure mounted inside the cabinet. The amplifier we ighs 56 pounds. however.volt . exactly half the weight of the amplifier. the next question that pops up is . nets. Inc . Two pre-sprung straps. It contains the 3CX-aOOA7 tube wit h a T eflon'" chimney.1991 Bryan OH 43506 Tel: (BOO) 736-0443. he Commander II amplifier. • Hew PA 170 70 eum_...o". BOARDS CIRC LE 243 O~ REAOER SUlVtoeE CARO PROTO TYPE P. Inc..... an. I 'io\J 'Take . depending on the drive . PRESENTING THE RAS -2UWB R. .. . ao..\fATJOX r . See you on 902 . .9556 for immediale attention IN FAST TURN I '..r TX 3I _ Rll -FCC IlPIlCCIll*i<lbw'. I used a Bird Model 43 with vario us elements.&32 . #1..... Catalog ava ilable.8807 or FAX 714-63fl. po<tr. This means the amplifier is very stable and won't go into oscilteucn while the drive is still at zero. . with about a 15O-volt drop in the high voltage supply at full output.'. R)Oll-220. .... "" h H . _ . 3456 1iJ W/REI ctaI-.. Am. drawing close to 14 amps at full output . ~ '" 1lI. TEN-TEe 117 WEST WESLEY ST REET· WHEATON. but unless there is something such as the Commander 11 in the out put. Te ch no lo g ie s ·. Choic:' 01 BNC or Pl259 Connector.S _ _t' • • SOI5O_1I. ..obI e... 5760 . eve n 5 walls will give over 100 watt s output.". A _ As .1'lONS. Agai n.~ _ ~ _ ""'_ItUl~_ oI\..~_"'_USA COMTELCO INDUSTRIES INC P... DESIGN SERVICES FOR .(708) 668·9577 73 Amateur Radio Today ' Febru ary.9llUl ..o. Rl15-'''' 1On~. . G-.. Wiring the amplifier for 220 VAC resu lted in better requlation. TWO fIIIfTDlS. there you have it. this amplifier really puts out the power-at least 700 wall s! And if you really watch the grid/plate current and don't exceed maximum ratings. II 19. MT 59 71 5 (406) 586-1 190 1-800-634-4622 1-708-790-9894 (In_l CIRClE 21U ON READER SERVtoeE CARO c:u. Above 900 M Hz . fST _ I . R)O'-4C) F9??~ ....· _ _ . 5 ""'II ) .. .. "'_1110 __..._ _.• w. ' A<l<l S3uPS S'Ol IDr _ P.R. it can run fine at 110 VAC. CItI ..Only ... If you have a dedicated line for the amplifier. 5<18 ' SlH-PIane _ SWA (' 5. .. Easy to Tune Overall .68T4:'t..E Contact Peter Putman KTl8 at 3353 Fieldstone Dr..4rt FOfl YOUR W. Most of the rigs today have good receivers.$12..- $84. ..1h 12 IL 01 RG 58 eo. I also ru n plenty of FM simplex with keydown times of 5 to 10 minutes for each " goaround" during an en tire evening . When you key the amplifier without drive... ·w. "'Hz o...5._ ollsebpola... since the gain difference is about 15 dB! And that's really handy when trying for that ex tra grid square on 2 meters.. rec ei vers and transceivers for the popu lar 70cm band as well. and at that point the amplifier is ready to go. such as transceivers and preamplifiers for 23 ce ntimeters..n*-. I fou nd its efficiency at about 60% or better. He also carries a series of AM ATV transmitters .lDr POWERllMDERS ' W !loIm.115 •• Trunk Mount __.. ClflCl E 1 1 ON RUOER URI/ICE CARO NOW(MUCH IT'SSATAD SMALLERI MALLER IN F A C T ) THE BASY M-BIT I D1MUNITIVE PRICE INTROOUCTDRY PRICE 2304 .fJII5CDV[lI Wald ron IN 46 182 (3 I7) 525-6452 Don Miller W9NTP offers a lineup o f FM video transmitters and receivers for the 900 and 1200 MHz bands .- .lSP£ClFD. . Inc.95 toL. For the most part you are looking for maximum output while Checking to make sure the grid and plate current s are not exceeded .... This amplifier really run s well...\·f(JR.9O ._ _ t2.. (1171774-5298 7 -J OP. E. LllTlU WIlE lAAIOWIllll DIE l"EIlFf:et .....n.. the list is by no means exhaustive ! Surely there are mure entrepreneurs out there pedd ling microwave components at hamfcsts than I know about.. -- ·S<2ecIu .. loeil p CY'" N SPECIALISTS .v. the score is not even.' M . ST-'O<"' ''RA"".- . ' ' •• 'ol ~ M H z FIB ' 8' ''' 22 dB I Well . but even at that level my output wa s still 450 + walls! With the 25 watts fro m the FT-736R .. ~g.00 eo Thtu Body Mount _ _. f(XD. and a mu ltimode Yaes u FT-736R VHF and UHF rig at 25 watts for the high power testing _ My transverter only had 15 watt s.""'''''h __ .RS. and I had no bad reports of audio distort ion or splatter up and down the band . . DIeler ~Eno:lnQiu:I AXM INCORPORATED mm 11791 LoaraSt...P"'* -"""'- ' N_ i<l ~ WH.. There ha s been no problem with the amplifier as long as I keep the power output around 400 to 450 watt s. 1 ~ _ ~ _ ..I...61 HAM RADIO TOY STORE. but now r can work anything that comes through on the receiver! One final note : r am really glad to see an all-Ameri can company producing such a wellmade piece of equipment! iii Continued/rom PUKe 53 wyman Resea rch . .~.00 eo 34374 EA ST FRONTAGE ROAD BOZ EM AN.1'. IL 60187 . ._. / - E·-.n PA 18901 . As seen by the table.• Doyll"sto .M. dh . '33<180 . CA9264(}. most people commented on how good the amplifier sou nded! Putting the amplifier in and out of the lin e was fun. I see a whole new wortd open up . 10368 1296 etc El£CTR(. _ TII.\fORE 1...C... oClCl• • • • 2S _ oF.2321 ~ CALL 71.. & NO FOl'l OIJR NEvO CATALOG TOOI'oV RUTLlNO ARRAYS 170 3 W_ _ St.delay ci rcui t is complete.uJ8.I P.00 • • • • SINGLE & DOUBLE SIDED PLATE THROUGH HOLES TEFLON AVAILABLE P. On-the-air checks wh ile runn ing SSB were all very good. and the grid current should be zero..oeoeoUl _ _ $489. you can get almost 1000 wall s power SSB. The ta-vcn relay circuit requires a hard contact closure to ground rated at 150 mA of current draw.95 MAGNET MOUNT OUAL BAND MOBILE ANTENNA _ 140-150 mhz 1435-450 mhz 150 WATT POWER RATING "~ Mld l a n d 1"11 B 5u~Pd .TV . you haven't much choice! This will make the job easter . C. .... BOARDS AS LOW AS $25.20 <ltl . Don 't let it get any higher than that on FM unless you wan t to purchase a new tube soon! After having the opportunity to run this kind of high power on 2 meters for the pa st couple of months .C.. I was always hearing very well. up to 1000 walls for all tests." 60. ....SuileB Garden Grove. Box 95 ElliIrT ElEIIEMTS.. !ZI ~ ~ UNCLE ELMER SAYS: Come in and o perate our demo station featuring TEN-TEC radios. The nominal input drive is 10 to 15 walls.. My own staten consisted of a multimode Yaesu FT-9010M... 1991 55 . In fact.. tuning is straightforward... _ _ ID. the plate current read s about 120 mA. of cou rse .. Clip this article ou t (or put this issue aside) to use the next time you come up against a wa ll when sea rc hing for pans or whol e assemblies . wh ile 25 watt s is maximum. Amateurs are supposed to be a resourcefu l 101. lABLE Rl12. _ .1r CALL for low p rices . And. _ _ .. ru. ...._ / ~ 000""'11 .. I purposefully omnred the major manufacturers who already heavily adve rtise thei r microwave products. with the FTV901 R tr ansverter at 15 w arts for so me of the testing .. 1r.. I found no erratic plate or grid current read ings at this point while tun ing the plate and load controls along with the input tuning."_ oOTMF ~~ . these are tllne-only hunts. But many foxhunters abhor timeonly hunts. instead of going aller it themselves. KIOV POBoJC2508 Ful/ef1on CA 92633 Leveling the Field In RadiO Direction Fifldlng (RDF) conlests. Uscalled the Crenshaw Factor. Thai is why a standard method for norThe rest use mileage. Almost alWays. Traffic tie-ups . as well as those who view fo. " Wha t' l your Crenshaw? " is being heard at the end of hunts quile otlan. and additiOnal five points for each unlound 15 minutes after mer. The lowest mileage wins. in Crenshaw Units. jt's bad enough when il causes a drag race on a vehicle hunt. They '". your group can make up its own set of rules. III . No. Four leams have found il and laken lheir ways had sig" tickels " from the nole pad. some appearing 10 be im01judges available 10 do the timing. there will be controversy. second gets 10. etc. All perncrcente. some feel that the time penalty turns this hunt into a road race. The first finder must be careful not to give away the location of a concealed T to others who are sniffIng nearby. as in every Olher sport. because some hunters will stan much closer to the T thall others. Thewinner has the low· est number. World class fooI-hunt competitions otten use a " staggered start " 10 avoid thiS problem. or lhey won't parti. including navigalors. There is roo incentive to dig out the sniffing gear. even the shorter ones. and the first tinder wins . When San Diego hams hosl a big convenhon and puton a T -hunt . and open drawbridges don 't ruin your day on a mileage-only hunt. AnOlher problem occurs when teams get the same start bearing and follow one another. because they know the laslest routes on the 10call reeways and highways. It helps level driving a careluUy-delined section of the field lor new competitors. Of course. Number 15 on your FlHKlblck Clrd HOMING IN Radio Direction Finding Joe Moell. each transmission is one minute al high power and one minute allow power. We can use objectrve Criteria for scoring. (Pholo by WB6UZZj nilicantly lower mileages than the others. however. where speed is all important. 10.11-01town hunters lace Traditionally. 1991 II takes only a few seconds with a calculator to determine the winner 01 a close hun t with Crenshaw Fac tors .imale cor· rected mileages.Ir CombinfltiQn Mileage-only and t ime-only hunts each have good and bad fealures. Every· one starts hunling simultaneously. And •• . where there are plenty Mileage hunts can be almost as simple as l imed nunts. One or hidden Iransmitter was aclually buried and concealea wilh two teams al/eaves like this. I am always look· ing lor good photos and interestirtg hunt stories for this column . Odometers are read al me beginning and the end perm. Mileage hunts have their own problems.s a former world class ice dancer. lime laclors discourage sale. To make hunting more 01 a chal· Ienge in the flatlands of Nebraska. merely occasional sn ide comments abouIthe "inflation" 01 claimed Crenshaw Factors over time. where the /inal score is the SlIm 01 odometer mileage.hunling primarily as practice lor jammer hunts or saarchl rescue missiOns. That's fine lor a European radiosport championship. Some Clubs have addilional meth· ods of scoring thaI include keeping track 01 the progress of all participants over the course of lhe annuallo. 56 73 Amateur Radio Today . and each oflhem is independenlty timed Irom start to finish . $tafldings are determined by a panel of juOges. who wonders when he or she will gal 10 go home . One of the students in oor IocaJ beginners' ham class . right? This method is the lavorite ot the "spcrtsmenvtype of hunter. Be SlIre 10 take pictures of your group's most inleresting ROF setlJPS and clever fox dens. Just divide each hunter's odometer hunl mileage by his or her Crenshaw Factor. long Ireight lrainl. where the tranSfmllOf is often Is Mlleege Better? 200 air miles away. San Diego (Calilornia) hunts are always time-only avanlS . Competitors start at regular inleNals. In an en-teet hunt. Needless 10 say. II the hider lets it slip 001 that at least one team has loufld the T. 's antenna . Fortunalely.es transmit for two minutes. The /WO meIer n unts. either as the only malizing mileages was devised. This has led many clubs to adopt rules lhat include both time and mileage factors . a f ive percent Of the 15 monthly hunls i n the odomeler error (quite common) fregrealer Los Angeles area . Whenever leams finiSh wilh mileages a percent or two apart. instead of as a about nine miles . Pick YOI. are compared. Aller all . It's i mport ant for all hunters to feel that they have a tair chance of winning . That explanation may seem a bit complicated. use time as the sole factor for winning. thiS is very annoying 10 the hider. and so on . a participant wilh a physical disabilily is et a disadvantage . From there on. -_. It's lactor or the most important factor . He or she gels live poinls n net found in 30 minutes. because ing odomeler mileage eliminales raceach hunlOf calibrates his odomeler by ing and timing problems. as the Sou thern California All Day Hunt. promising lhem snacks. such one wants the liming chores. trying 10 get the besl 01 both worids . On me olher hand. of course . then drive in the left lane to " engineer" types (like me) who view a lhe slop sign at lhe starling hilnop and T-hunt as a field e. Ma intaining Interest on a long timed hunt can be dllllcult .periment in proparead il again. tneee is an elemenl 01 luck involved. He has told us hon"or slonesof the $lJbjecl:ive scoring Iy$lem for compelitions. who are Crenshaw Boulevard on the way Ie the less lamiliar with local geogtaphy and starting point. This syslem encourages careful lriangula· ucn and rou te planning. Cumu lalive slandings are updaled monthly and posted in the club newsleller. while also keeping the hunters moving along and lorcing rapid sniffing. courteous driving skills. In vehiCle hunts. Ottl An obviOus method lor selectIng T· hunt winners is 10 use a watch . to aid hunters who use rudimentary auenuencn un- eeecos Now that you know the pros and cons 01 variOus scoring systems. There are far lewer disputes. February. Some club rulel allow hunters 10 start anywhere. Some hunteffl don 't like results to be expressed in Cranshaw Units.. the other hunters know that they cannot win . these gripers usually don 'l partiCipate in that hunt. third seven. Nebraska. I am IOld tha I con ti nu ing odomeler argu· mant s led t o l he San Diego hunters changing to lime-only Figure 1. toll. unless the hider can keep them going by baIting them . when everyone wanls 10 hunl afld no On very long distance events.0 10 gel appro. Mosl Fullert on (Cali fornia) Radio Club hunters like their system. "These hunls tevcr the ath letic hunters and the daredevils. Get started now. Lowest hunter's score wins. The elapsed mileage is the vehide's Crenshaw Factor. Mileage hunts are preferred by nut shop. the operalion 01 their ROf gear. so their place in the finishing oroer has already been determined by their mileage. up 10 25 poinls. only three quently changes the order of l inish . as we have seen . but it's impractical for small club outings possibleto achieve by any route. The results.hunting season. so they multiply lhe Crenshaw Units by 9. They may qu il at that point and go home.hunt winn8f'S ar&rl'1 pidled thaI way . Hunlers read !heir odometers with Elim inating time as a lactor eecccrthe I"IOS8 of the vehicle alongside a tel&ages hunters 10 be carelul afld methodphone booth in lronl of a certain d0ughical. 8vl whiCh criteria 10 use afld how 10 apply them can lead to controversy . this isn't 8 special ~t-up shOl. Some hunters take advanlage of the lack of a lime penalty and hunt v+r'Y stow1y. get eneest ona cotnt. PE. but it's even worse when fool· hunting." lhey say. lhey found the parking area. Easy. What 's Your Crensha w? The biggest problem w ith mileage-only hunts is odometer eeueee hon. e's easy for some lazy or poorty equipped teams 10 hang around and watch someone elsa try to 'erret oot a carefully c0ncealed Iransrmller (see Photo A). II an on-fooI search is involved at the end of a mileage hunt. cipale regUlarly . Are you? The biggest complaints about lime hunls arise when localS and 01. perhaps on a hIlltop c\o$e 10 their home. afld " hype" appears to be as much a factor as talent afld sk~1 in winning the QOlcl. bu1 actually it's very simple and quick 10 do . 01her hunters may be willing 10 push lhe speed limit. it's important for winl'l8l'llo be determined by fair and uniform methods . Of course. because the warm weattler hunting season will be tlere soon. poorly·timed slop lighls. en. perhaps slopping for leisurely meals along the way . so it becomes a sell·fullilling prophecy. plus a time penalty of onetenth mile per minute Irom start 10 touching the fo. many Los Angeles and Santa Barbara area enenoeee gripe about the likel ihood of the San Diego teams winning all the prizes. then ere silent for three minutes. The hider uses the high power mode on the rig unt~ one hunler requests a switctl 10 low power. In Lincol n . lhe lirst finder of each hunt gets 15 poin ts. Even the hider scores in the coln ARC syslem. usually gation and navigation. others are a bit sloppy. If you want to be able to tear down the system into its most portable state for backpacking or such. This will act as a spacer for the next plumbing piece. but stop at I" . The feed illumination is good. solder the copper adapter to the radiating end of the feed system. force a outside pipe coupling (just a copper tube that fits over the joint of two pipes) down the pipe to as near the flange end as possible.. The feed system can be adjusted by screwing the assembly into or OUI of the dish. Placeabout Y2" ofthe end ina vise and squeeze the pipe with the vise until the pipe is an ellipse about II!" wide. This will make the annealed end of the pipe very soft and easy to work. (612) 786-4475. that permits the 10 GHz source to be mounted behind the dish and fed through it to a modified "penny feed. The PVC adapter could be machined from a better microwave plastic for lower losses. One of the old " flying saucer" dish snow sleds would also work if you modify the feed's length to meet the new focal ratio. conveniently located at its center. but it is a usable system that can be made from hardware store plumbing parts. providing a focal length ofabout 8. This disk and feed system may not be perfect. the polarization of the output will rotate. Figure 1. Bloomington MN 55431. use a small file to remove it. 1991 57 . " PVC female pipe thread to PVC pipe adapter 1" copper male pipe thread to pipe adapter l' galvanized iron female pipe flange WR90 waveguide flange 3V. the polarizationof the output will be withina few degrees of the original source. The only microwave part used for this system is one WR90 waveguide flange. Screw the copper adapter about halfway into the fl ange and measure the length of the pipe sticking into the dish. It can be as simple as an unpowered Solfan unit. a PVC (plastic) ed to a pipe adapter. solder the waveguide flange to the pipe and the pipe coupling and adapter assembly. mark and then cut the copper pipe to make it about I II! short of the focal poi nt. at right angles to the first squeeze. drill and tap the copper adapter for a set screw to hold it tothe feed system (an extra nut soldered to the outside might be wise) . The PVC adapter is epoxied to the center of the copper disk. If everything checks out. For a completely portable system. For fixed operation. " copper brass disk Note: 18" and 24" dishes are available from Satellite City. The feed system starts out as a 12 piece of copper pipe. Then the separation between the end of the waveguide and the splash plate is adjusted for maximum radiation. L OPTIONA~ SCATTf" SCRE w AND ""' 1 1 1 1 12"lengthof¥o 'copperwaterpipe ¥l " male pipe thread to J. Measurements taken across the dish (built with the dimensions shown) show a reasonable illumination pattern. The feed system and splash plate can then be packed inside the dish. The dish is an old 18" surplus HBO dish left over from the days when premium channels were broadcast.. a I" male pipe threaded to a J" copper pipe adapter. N * * * N *" Tune Up Tune up is simple: The radiating end of the feed has to be set to the dish's focal point. During the machining." A chassis punch or drill could be used to make the hole on a solid dish. a dielectric lens SUlIClUre could be formed to optimize the scatter from the disk. Before the assembly is soldered. An 8-32 screw can be inserted into the center of the copper disk and adj usted to scalier the RF energy better as it hits the disk.i . Check to be sure that the end of the pipe goes intothe dish at least far enough to be within an inch of the focal point. Screw the feed assembly about halfway into the pipe fl ange. At this point there is an option. The copper disk can be made from a piece of single or doublesided PC board. should be less than $5. Parts List 1 1 1 1 :q . If small dents or distortions are introduced into the pipe. By repeating the operation a few times. (Jerry) Jensen WT0Wat 10900 Ewing Ave. iii * N * Contact Arthur J. A layer of clean copper wire can be wrapped around the coupling. Assembly ofthe 10 GHz dish andfeed. You will need some sort of power or signal strength measuring device to make these adjustments . or a single turn used at the end(s) for spacers as needed. and there is very little measurable radiation escaping the dish. The splash plate can be adjusted by screwing the PVC adapter further on or off the pipe thread. These adjustments interact and should be made to optimize the gain of the system. you will end up with an end on the pipe that fits the WR90 fl ange .I. you can make the splash feed removable. If everything has been done correctly . Put the adapter over the pipe couN. February. so construction projects have to use available non-microwave parts. * N * N *" N pii ng with the male threaded end away from the waveguide flange . ~ Number 16 on your Feedback card An Inexpensive 10 GHz Dish System The plumber's delight! by Jerry Jensen WTfIJW T his design for a 10 GHz dish and feed system was born of necessity. 73 AmateurRadioToday. Anneal one end of the pipe by heating about 2" of the end until the surface looks very clean (don't get it red hot). S. If you get any solder inside the end of the waveguide at the flange. then plunging the hot end into cold water. Costs are about $20 and $30 respectively . Once the end of the pipe matches the flange. without the dish. 2663 County Road I. This wi ll allow you to pull the feed system out of the dish. Moundview MN. Next. This is then screwed on to the pipe thread of the copper adapter and the disk. Just measure the mixer diode current of the unpowercd unit when it is placed a few feet away from the dish with a sensitive current meter. It has a focal ratio of 0.4. Another Gunn transceiver could also be used to peak the signals. and a 3 IA " copper disk. Some adapters fit over the coupling tightly. Pliers and careful hammer tapping (with a sharp right angle piece of steel held inside the pipe) will make the corners of the squeezed pipe perfect. be very careful not to diston the N copper pipe waveguide when you tighten the screws. ' pipe adapter ¥l " female-female pipe coupling 31. mount a I" galvanized pipe fl ange on the back of the dish over the I " feed hole in the center. There are few sources of microwave components here in the Midwest. Even that could be made of scrap material if you can't locate one easily . If you have built the portable system with set screws. 1 The dish I found has a J" hole. The splash plate assembly is made from a male N pipe th readed to a N copper pipe female pipe threadadapter .. Be careful not to strike the copper hard enough to stretch it or you will end up with too large an opening. rotate the pipe 90 degrees and do the same thing. Total cost. Yes. Nor.. Some prepaCkage<:! m icrowave mi xers come Wlth coaxial con nectors attached to their three ports: RF (in/out).L. True . -. they work and they 're relatively inexpensive.~ "0 / ltr -".. The basic body con ta ins the same IF ty pe am plifier described above.. Alter scrapi ng the paint off and picking the epo~y away with a knife ...xer ports are labeled R (l or RF). ~ _. The CIrc uit won:s just like a full-wave rect IfIer in an ACIOC power supply. that's "in/ou t. tlOr'l and will test like a basiC diOde.O. _ ..'. deflnilely not 1 GHz stull.. . so I pic ked it up. ~ Ul '.5 GHz low treq uencv mixer of some Iype._. . and X (for IF).""'" •• ~ . Test GaAs deVices in a creon. . I was e xcited .""C'". the bigger Ihe package. port. . coup ling and phase canceling RF from port to port. quadrature IF.'7:t. I was able to remove the bolts . This un it has two mixer diodes and usually comes wit h an intern al pream plilier optimi zed aro und 70 MHz .. . You 'll find various applications l or it in almost any ARRL handbook. VHF and Above Operation C. The device was a very high freq uency p hase combi ning type of mixer. . are capable 01 operation up to 1500 MHz . .. L (lor L . - " .. in oameter atlow you to service the detector dioOes. and 'h " thiCk." . expressed in decibels . . Looking attne circuitry. The GaAs lype mixers have statiC-sensitive junctions al1d can ea sily sel1-destrue:t WIth improper handling. you can combine the cerector diodes with two coupling cepecrtors to term the IF output.. The actual m ixer cir· c ui try was about ~ . . L .. . • "-" . I have used this mixer in many erne-em converters .our .. take a gamble al'ld pick it up: yOY do nol kl'lO'lW what you mighl be missing. . . al1d local OSCillat or.. double·bal anced.. • v I' . I could see it wasn 'l cetecuve. revealing the inne r c ircuitry..._.0( Ftgure 2. .. I put the un it back together and tested it et a much higher Irequency . A m ixer sim itar to the waveguide type operates at lower freque ncies. IF (in/ou t). I •• . " . wh ic h describes a mi~er lo r 5. not with the ohmmeter .OT . Needless to say. we need mixers that ooerete at frequencIes from 2 .. One ofthe waveq uide ports is the RF inpUI and the other is the local oscillator injection for the m i ~er. .. Noise figure...Herenl approa ch by coupl ing the RF and L. and even triple bal anced Iypes. Mixers are rated by con version loss and noise figure. mally.. Don't forget to provide a DC return 'or the mixers .. ./ . ~. but they will work as well as the expensive lypes.J _ .. M.O.3 GHz operation . ports in a unique way . The " ort ho mode" waveguide mi~er (see Figure 4 ) takes a lolally d. but usually the mi ~er is by itsell .. Th ese can be sinqle-balanced. I I • . . I would lim it the meter test to the lN21 and 1N23 diodes.. This funher isolates the ports. Weveguide mIxer for 10 GHz. Houghton WB6IG P San ~ MicrOwave Group 6345 Badgef Lake San Chego CA 92119 . Two caps about '1:1 . Testing microwave detee:tor diodes is SImple. Pack· age styles can vary quite a b it. II's d il!icult to represent all the details of this mixer.. and 'ound thaI it functioned in the 810 12 GHz range.. it fai led 10 pertorm at these Irequencies. ers . IfltJxp6r!StVe In a high quality SSB or rl8 rrQWband FM miCrowave converter. as they have a standa rd june:. It the device is a good noise-figure type . t thought it wou ld be a SOO to 1.~ . What I will do is describe some Of the more common types I've observed in surplus..." as any mi~er can be used in receivi ng or tra nsmining.. MUIer for 3-6 GHz range ""'f'~ "' P<>OT r . er. use cautiOn not to exceed lim its. This mixer is waveguide orientated. II you have one 01 these mixers.. These mi ~ers rome 'rom aircralt radar and some ccmmcrvcarcns systems. 0' 58 73AmateurRadio toasv » II a n il em is in e xpenawe .. The price was right. such as the TFM -l . An SSB Modulalor AI a Ilea market. You can identify their Irequency by the size 01 the att ached waveguide. the be"er the mixer will perform in receiving weak signal s. The IF amplifie-r could be bolted 10 the rnuer.. ~-. You can usetham 10 construe:t $l. This is a common IF lor commercial systems.''''.. it necessary.l..) Quite a monster as mi ~ers go . the lower Ihe frequency . IF eenneel ions a re mad e to both the del ector diodes.. ( ~~ Figure 3... the most 'a miliar being the double balanced mixer (OBM) that's simi lar 10 the SAA. . Note Ihat this mixer only uses two diodes: one is posillve and the ot her diode is reversed in polarity . .. . -. ThIS method ach ieves a high degree balance . One problem is that th e voltage rating and currenl permuted through mese m ic rowave diodes is quite low. The old reliable lN21 (6 GHz) and 1N23 (10 GHz) diodes used can be tested with a basic ohmmeter ... . Use the limes 10 scal e to limit current .-. square. February.. I have interchanged them wilh no ill ettect. " Why all the in· formation onthese mixers?" Well . _ -~ . . _.. el"lCl in test ing them .O. but whe n I te sted it.< .. They may not be the latest state-et-me-ert mixers .~ Flf}Ure 4 . -<-"~..). Several variations are staning to appear in surplus. I opened it up 10 see what was going o n.... I woold not want to subject expen· etve diodes to the ohmmeter te st.- ' • • ••• • T· • • ~ ." •• t. . but not always. You must use good judgement. Usually. (Normal isolation between cross polarizatiOn is a m inimum 30 dB loss).. .. . /' ---. . Since some of the newer devices.. Most devices run out of steam at SOO MHz: some special types. >'[""...eo I . Size is the only drawback . .6 or 3. The ortho trIOde mlXf!K 10 GHz (good surplus .-_.. . rll(l'" n.. such as GaAs types. costing about $10 to S20 ea ch in surplus .'000 • ~•• .• injeCllOr'l. no chance of Wlnntng Anolher type 01 mi~e r common on Ihe surplus market is waveguide m ix. See Fig ure 3 ... the mixer COUld well have been another doorstop.~ (. the waveguide ports are replaced with two " N" connectors on the opposite side from the oetector diode caps. image rejection.. (See Figure 1. The lower the clecibel value . . but no gamble.t . is the ralkl of signal to noise .'.1991 -" .3 GHz to 10 GHz al1dabove. . Th is will not guaran tee any figure 01 meril {noise fig ure) of the device. will be destroyed or degraded by test voltages Mar 5 volts .$ ou ~. I found a device labeled " SSB MOd ulat or " that was 3'/2 " h igh . A small RFC will do Ihe triCk . Conversion loss is the ratio of RF input power compared to the IF output pow. OM 'lO _ me ••• ~ . alter the device is built. 01' " "'IT •• tor ssa 10 GHzJ.. ' 0100' ~ . Now you might ask . improvIng unwanted m ixer produe:ts teem e Ither the USB or LSB inputs .. .. -. rat race.'lOTI". '. With the AF port rotated 90 degrees from the L .. 5" long.. you might want to wait until you c an test it in a c ircuit . and it will show you il the junction is still alive ... Access 10 the inner parts was hampe red by bolts epox ied and painted over .. Surplus sse modulator tor 10GHz. Mixer Perspectiv e 01 course there ere several other types of mixers suitable for our mi· crowave bands in add ition 10 the types described.. " '" " T - e» ll' .T lik ABOVE ANDBEYOND Microwave Mixers There are so many d ifferentlypes 01 microwave eeiectcre available that I could n'llully describe them all 10 yOY. Figure 2 shows a typical waveguide mi xer . one positive and other reversed or negative. but it uses four diodes and has combining sncunes on both the top and bottom of the very thin PC board . has good porT isolation... The umt split into two sect ions (top and bottom plates). The wavegu ide may not be attached because a larger size is requ ired .- Ftgure r.r" _ '. ..'co ""!. 23 ~ - 0 "[ /' ~IOO[ ..O.. But lor o ur m icr owave bal1ds. . noncriti cal. I would apprec iate any help or information on a source of these tubes . This program atso corrects for computers like the Radio Shack Model 100 that can't take the square root Of a negative number. "] I try to keep all items available to assist project build ing. you could replace the transformer with an electret mike (99C at Radio Shack). t worked the formulas out . You can get 10 GH2 equipment inexpensively by scroung ing local alarm companies for microwave alarm units. but usually came up with different answers. q u" r e "re" in i nch" s ": A 41l x . a surplus type. and I'm looking for a few parts.Il 10 G H z Fu n Chuck Houghton's article. In designing Gunn oscillators and detector mounts. Sorry about that.n pl~t"s". and couple a 15k resistor at pin 3 to + DC. SAME PROGRAM FOR GUIDE WAVELENGTH a UT CORRECTED FOR SEA LEVE L ATMOSPHERI C CONSIDERATiONS AN D ADDED "A8S " STATEM ENT TO CORR EC T FOR SOME COMPUTERS ' ME THOD OF HAN OL I NG NEGAT I VE / LESS THAN ONE 2 REM CO N S T A ~T CORRECTED FOR SEA LEVEL 3 REM AN D STANDA RD HUMI DI TY (2 9 9 761l) 5 REM PROG RAM CALC ULATES GUIDE WAVE (. REM SIDED PC aO A~ O BY MEA SURING THE 7 RE M CA PACITA NCE I N PF. and the value of the meter movement used in the 30 MH21Fsystem in the article . Next . I'll be glad to answer any questions related to our VHF/UHF microwave bands or similar topics.. That's why I am pulling for 10 GHz operatio n. The meter movement was a sensrnve-type 25 rmceoamps." in the April 1990 issue.INS 1 DE WAVEGUi DE 9 REM EXAMP LE wa /1 6 ~ . You can use anytype of meter up to about 200 rmcroamos . 4 • A 3 3B~ 2 'Z 4 0 C-X/B 50 D~C-2 E. and enter it into the program .0 7~ Llstmg I .. and if the price has gone up. Dielectric constant calCulation for PC boards. pins 2 and 3 of the mike circuit were erroneously reversed. Z$ 1 ~0 IF LEFTS {ZS .4 ·A 3 0 B. everything is going up.F 22 X_29 9 7B0!F 24 PRINT X 2(.! usually teu friends: If iI's microwave and the price is low.9 IN CHES 9 REM ENTER FREQUE NCY I N MHZ 1 3 I NPUT "F REQUENCY" :F ae I NPUT "DI MENS I ON A"..E-' 73AmateurRadioToday • F eb ruary .slmg 2. The total cost of a simple svstern coul d be less than $40 if you scrounge parts. and a few other parts to help you defray costs. and pin 3 nes to the mike circuit.. Alternat ively.$ ~ {l II' LEfT$ {ZS . which I'll cover in a future column. Well. Z_ 2 S.. See his " A bove and Beyond" column. and Listing 2 for a corrected formula for sea level/humid ity corrections.L ini ng I . K 7 0 INPUT " 00 YO U HAVE . Gary KD6RF wants to know if the PC board for the 30 MHz IF amplifier is stiil available .<. s t ~ n c " het ". actuaily). to the high impedance of the mike circuit. Mine was about 2k to SDk. Free space cecoteuon forgUJde waveleng /h. In the process of doing my math I make "misteaks"! Therefore. buy il.. Please send an SASE for prompt rep ly. fj-l-D 5 3 P RINT H SS H_ABS(II) 60 E-SQR(H) 7 ~ G-X/t: B0 PR1 NT G 84 1 _0/25.. Li stinq 3. He states that in the articl e. especially gasoline. Chuck WB61GP fjJ L. however the measurement is abraded by the fact that it iravere differently in a waveguide than in free space Therefore. 4 86 PRINT 1 9 0 lN PUT "0 0 YOU WANT MORE DATA". The program in Listing 3 is for figur· ing the dielectric constant Of a doublesided pr inted circu it board ."Y" THE ll 20 9 0 END 4 REM . CapacitorC34 was left off the parts list: it' s a 10 I-lF bypass. pins 2 and 3 0 1the mike circuit were erroneousiv reversed." y " T HEN 20 11 0 END the PCB.2 5 . Cost is still $10 for the PC board with the TDA·700Q chip. " Just how far from the back of the cavity do you space the diode or pick up in a transition?" The dimension is a quarter of a wavelength. I believe it would cost about a hundred dollars for a kit of parts along with some good scroung ing. he wondered . you can make a chart to take to flea markets to determine if you are looking at Teflon" or Fiberglas" material.. a leiter from Jeffry N0MAU. (See "10 GHz Fun. I've built aenooe detector . page 59. n 4 "A 5 0 K-O 'C/X 611 PRINT " d I e l e c t r i c con5t~nt " . I ) . it is spaced a " g uid e wave length" (one-q ua rter guide wavelength. 'Z 4 ~ C_X/B S0 D-C. The prog rams are short and can be typed in quick ly. and pin 31ies to the m ike circ uit. Convert the circuit by tying one end of the electret mike to pin 3 and the other end to ground .sure d c" p"citanc. From the Mailb o K Curt WA6TIP asks about the mike transformer . All you have to do is measure the capac ity of IT J"us r ~£'J1ii1 0(( uRrtl TO .A 3 7 22 X~ 3 \l 0 0 0 1l/F 24 Z-2S . " :C 30 iNPUT " . REM LENGTH IN F RACTI ONAL I NC HE S B REM DI MENS I ON A.3 Larry K1LPS inspired Ihe program listings in this colum n. C urt . Don't turn up your nose at some old grubby box with a waveguide mixer weigh ing half a pound and covered with spiderwebs.. Alarm cornpanies are tossing out microwave units in favor of newer systems. Check it cut.SQR(I-D) G_X/ E 8 0 P RINT G 90 GOTO 10 (. In the article .9 INCH I II lN PUT "D1M ENS I ON A":A 2 ~ INPUT "F REQUENCY " . but my price remains the same. the mike tra ns form er matches the impedance of your mike (assuming dynam ic) low Z.. GUide wavelenglh program corrected for sea level. He wanted to determine just how expensive it is to get on the 2 or 3 GHz bands . Listings 1. New developments in my shack include working on several laser related projects. "10 GHz Fun. " appeared in the April 1990 issue of 73. UPDATES PROGRAM FOR OIE LECTR1C CONSTANT OF P RI NTED CiRCUIT aOARD 2 REM THIS PROGRAM CALCU LAT ES Til E OIELECTRi~ CONSTANT or DOu a L E (. Pin 2 should go to the decoupling network and feedback resistor.. Pin 2 should go to the decoupling network and feedback resistor. fjJ • Listmg 3. as I feel this is a very necessary ingredient to promote low cost projects for our UHFN HF microwave frequencies . Well . I put the tcrmulas in a basic program that can run on almost any computer. " 10 GHz Fu n.-\ORE DATA ". especially head-on photcmultipliers to use in an optical receiver. D INPUT "".. Keep looking at flea markets and swap meets.figure how many square inches of material you have. capacitor C34. That would make a simple system lor 10 GHz cost effective.l J . FORMU LA FOR GUIDE WAVELENGTH ( FREE SPACE) REM PROG RAM CALCULAT ES GUI DE WAVELENGTH REM IN A WAVEG UI DE ENTER DI MENSI ON I N 8 REM I NCHES EXAMPLE WGI6 _. After a few calculations. See Listing 1 for the free space calculation for guide wavelength . 1991 59 .'I F 10 M PL1 Pol< A fEC-IPtZoCAv /-r CalCf bEfo I<£ I eA. but I want to try the photomultiplier tubes out next because they are more sansrnve. AND MEASUR ING B REM THE S O UA ~ E IN CHES OF THE MA TERIA L 1 0 l NPUT " d . in this p resent issue fo r corrections. Already built is a unique Circuit for the receiver. ' ~ S49. Hamlin . We'll record ~ o ur mess.. Voice vocabularies or multiple phrase. Koyl lne Output J2 Kb •• mplinx rate Mu ltiple Mode.g""'nd eM"e'. .n Non-Volatile E· Prom memory. Pl·259 TellOn.. 82 14 l1ls UG-21D1U & UG-2IBIU N's N Malc 10' RG-8 ".. Su p p l~ Size.1 ""tpul 01 . . Irl.O....s.J .i!r "... ' ~ SH.5IJ (. 11 DTMF lo ne s .95 LEO DISPLAY BOAAD . scanners. I"".oo). 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A VERY INTELLIGENT DTMF DECODER Price $70 Pl ·259IUSA 83-ISP-I050 83822 Pt. usable as a . 4... Number 18 o n your Feed"-<:k urd Ox UNADILLA ANTENNA . March 1. via F6FOK viaIK6FHG TY2A 80.EW manu facturers of the original JAM ES MlllENTV Products 508 975-271 t 9am-5 :!E"S::T.:. P lease do not submit cards for cred it prior to t hat dale. Contacts with Y2 through Y9 st atIOnS on or after October 3 ..875 cropo ror ••p••a..E 13. consistin g o f 16 separate a w ards based on numbers of islands co ntacted and world location. id en ti fyi n g ... The Isla nds On The Air (IOTA) Awa rd program goes one step further. It gives you a reason to learn about the world' s islands ..299 TASKA TP2C' TY1DX Ryde.t7NS V63BO V630X V73AZ V85QM VP2MEU VPSVWB VPSVMA W6TEXlCTJ XX'KA XUBDX YJ1A YMSKA ZS9IW6KG Z59Z Z59Z1Z51 1-61100 Pesaro.600 9V4H A35DM A71CD via SM2BFJ et tecuve Oct. Wo king. LlMHH La" VIa LU6FAZ lP3F LZW via LZ1KZM PYlON/POe . ~ CootgLyour Local Ham Dealer TOdav!!! To o rder direc t call (508) 475-78310r write for o ur infonnational brochure on our other fine products BaI. 1990.. 18via N1HBF t 990 COWW phone ~i a OK3LZ OCt..mtf Ine<Jflo.1 Re-I. Geoff spent tw o days each week surrounded by auases and naval ch arts .nty -NOTICEWe are the 1::l.615 24.And .. is ad de d e uecuve t he same d ate ... Chobham... Yemen: Effective Ma y 22... l 990op was KGYK (4Ut UN) via N. the People' s Democratic Republic of Yemen . the da y the IOTA Dlf8Cfory was first published.. By early No vember .::::::-. All p-oduC1ll _ wtltt. 4 W .MlnI MII'II !CW· IO !CW·12 !CW·1S N ·H OW-JO OW-JO OW.·c..& - PO Boll 4215 ev- (508) Hams Around the World 474· 89 49 THE 24 Hour FAX Bob Winn W5KNE q:. M imbridge ."'CW ' S2WX FK8GJ FOOSSJ F08AA FY5FP GP6UW HC2G HOlT HX6DMX 1J8MA5 JJ70X via CX4CB 5V5A ~i aFP SOX T30F via SV1AIH viaOH6Z5 1990 Gal/book address T30JH 80. has been set as the earlIest dale l or subm ission of cards lor credit for the new Yemen listing. 1964. The price is US$4. Y2 through Y9 .. USSR .. <all tor additional into and q. is dele ted.q.. Shortwave listener Geoll Walts created the lOTA Award program in the 1960s ..co••I. 199 1.NNN sameasC90l via ZS6BCR viaOH2BH 73Amateur Radio Today .. . prior to publ ication of the next Honor Roll listing ..IOtI. Honor Roll members who have made ccntect w ith Yem en since May 22 ..125 7. US$5. where daity proce ssing o f numerous transaction s is co mmonplace . PY1QN RJA VlaRA3AQT UHaEA V47KP V. Yemen .. ol hers now via WB2WOW via K4FJ via PAIVA... NSW2112 Australia via HAlNNN NovemD8f 2--4. because t hat country was absorbed by the Federal RepubliC of Germany on t h aI dale . applying what he'd learned in banking. 70. 1990.00 Of 7 IRCs in E urope. are ceieteo. 30 o.·ENDaulflO.:: CIAa.·RII.. and the Yemen Arab Republic .::::.A2K via WB6QKK viaK6VNX via W6MKB via W6XD via KD5G Y via XE2AO 1990CO WW phone only Vla KN2N Gal/book address... when he began towonder what DXers would do when they had worked all of the DX CC countries . not DA t hrough DL. Box 354 JY9SR Amman.. February.. the ARRL staff. 1991 61 . l isti n g . em elope viaOH3GZ viaHA.20.·AM-. Spain P060x13 Vinnsi 203006 ESiorMa. M ull i·band : " pair IOf "'''' ~ band - . Mb' 23._"_"_ "" _ ••-:::.. Today. " Islan ds On The A ir" A w ard Program Possibly one o f t he many good th ings about DX ing is the c hance to learn world geography. the delay should be st eadily red uced to an acceptable periOd. 1973 .Jordan VIiI K9EL K9ELNS6 viaJE1 CKA 'HOAM . .y W . 1990 .. and groupin g islan ds and arChipelagos by continent The l irst IOTA contacts were c redited on December 1.:.175 10. a new country ... ". La Q u inta . th e German Democratic Republic. P9X 9H8C 9J2FR '..ce OI - I ""' ~ . will be able to update the ir credits during t he month of Marc h 1991 .... many of which would o th erwise go virtually unnoticed.. laced w it h a large backlog in processing DX CC acceeeucos. t he o ffici al allocat ion l or the Federal Republic 01 Germany is DA th rough DR. ON MAOIER SVlVlC£ CARD aSLROUTES 302M 457EF 4U1lTU 4U1lTU 4U4SUN 5W tJF 5WI JJ 5WITD SWtXO 602)( 512A 7Z1 AB .950 gI 21..a! f".."" 3."".-_ oed <:u. R. As the new process gains momentum . Oatar AYOf CN2CW CN2JO CN8YP CNSW COO" CR2UW CT3EU via LU9FHF VIa F2CW viaF1MJ op was F6ATO via F6FYP via F6EEM Vla G3PFS via CT4UW via GJPF5 CV2V CY9CF 068GA 068VT ..y .00 or 9 IRC s outside o f Eu rope . NEW 17 JO JO . 70. OW-eof 10 "ts ... a dela y o f apprOllimately live months. Italy nowvia W58WA via K200X via W9NSZ viaVE3JDQ viaJ A7HMZ via KX6DC Cal/book address ~i aN 200 via K8UE viaWD8AIH viaWOBLLO via W6TEX viaKC9V viaJAtNUT . For almost si ll months. .cncyl . D XCC Processing B ack log In lats October 1990.P1. I 1""~ Jf>ncy ~ ~W ~P • OS i KW ·l 0 KW-20 KW · l 0 KW·20 Special win: lmgth data is shipped with you r trap order. In their place. ~ia N6ZV ~ia K5VT EA4CW.& MANUFACTURING CO. QRZ OX PO 80)( 832205 Richardson TX 75083 Germany and Yemen German y: The ARRL Award s Commillee has accepted the tcucwin g recomm endations 01the OX Advisory Committee: ElleClive Octo ber 3 . You can ob t ai n i n fo r m a tio n about IOTA' s award program and a cop y of the island Directoryfrom Roger Balister G3KMA . Jose Ricardo tccee P060x28067 2flOBO.) via 12ZZU via N200 ~ia eal/book address viaO N4QM eo Box B0074 A~Wa kr . III e:er-MAOO 1810 BIG SIGNAL (508) 475-7831 9-5 EST M-F Turn Your Antenna Into Several Antennas! With the ' O ld Relia ble ' W2V$ antenna trap s ~-- Traps Needed t or . J . Surrey GU 24 BAR. ARRL Busi ne ss M anager Ba rr y S helley t em por a r i ly too k charge.. F6CXJ via KSJRK via N6VO lor Norlh America viaON4Z0 -ncaxrr via HC 2CG viaW2KF via French bureau via IK81SH via W8KKF via I<8CV J37V Ray 5hankweilef.Madrid .275 11_111 14. w ill be credi ted as con tacts with the Federal Aepu blic 01Germany .. The com mi ttee doesn 't mention the form er East German sta tions w ith ca llsigns in the OM seri es: however . Ofgani Zed a special e ffort to speed things up . Gel rid of the Iarm" and put all of your favorite band.' _"" _ cee __. O ther new assignments at ARAL headquarters also helped to red uce the backlog. and contacts With OA through DL statiOns on or after September 17. appl ica tions rec eived in June 1990 were being processed. is administered by Roger Balister G3KMA and the IO TA co mmi ttee.. ~antmna .. tms award program .. England.:M " -::F::=::::. . This supplies + 12 volts for several clr- cults. This was not included In the final circuit.hassis.. These were used to add a 25 ms delay to the transmitter. 1991 .. if you connect the stcetone out to sidetone in.. lIyou can't sleep at night thinking about it. Because of the nature of th is setup . or don't want to spend." I used TP1 LEOs in my prototypes. The tone generator is keyed on by applying + 12 volts to the sidetone input. just run the wires to the PC holes used for the trimmer. The contacts of both relays are rated at 5amps. + 12 volts is applied to the 47 \. a sma ll 1N4oo1 diode is in series with the supply line. so why include it? Thedelay circuit is fast (thisdepends on the type of relay used) and ex tremely easy to build. With a PC mounled trimmer to adjust the pitch. I added this feature just in case your keyer has a built·in sidetone. Mount the relay and use the contacts to your lik ing . You might also want to move the relays off the board. Second. and there will be no damage. One relay will con trol an external antenna relay and the other will mute the receiver. Delay Keying Though the final product is simple.. as the diode will rectity this and the 4700 1J-F cap will then act as a large filter cap. Notice that the contacts of each of these relays are not con nected in any particular way. since this could cause trouble if the high gain audio stages of a direct conversion receiver were to pick it up. Of course.. you might even be able to get away with running the antenna through the on-beard relay. ing the requirements tor mut ing or antenna changeover .T v .. In fact. delay switching and keying. small capacitors. Dundee IL6011 8.. one is hidden under the speaker. The TIR controner should be looked at as four different circuits . The four circuits consist of the following : sidetone generator.IF RS 272·1 030 or use 470 IlF RS272·1018 c. 1 1 4 1 4 1 1 1 1 1 1 1 1 1 1 2 1 1 Parts List 741 op amp RS 276-007 LM386 amplifier RS276-1731 2N2222 or RS 276-2009 2N3905 or RS 276-2023 lN4001 RS27&-1101 lN914 RS 27&-1122 Sk PC trimrm!r RS 271·217 tcoe PC trimmer RS 271·220 or lOOk panel pot RS 271. to control a 110 AC antenna coaxial relay. Power Co ndi t ioni ng Circuit Being solar powered. jumper these pads together and just turn the volume down. There is minimum RF bypassing von . knobs. con nect the coils to the proper pad of the T/R board. In the photographs of the prototype. To better understand how the TIR ccntroller works. While altthis is happening. This turns on 04 and QS. 0' The Sidetone Generator I used a 741 op amp to generate the tone.• !! • • • • • ttl . . Use what you need to keep critters off of the +12 von bus. A large battery bank supplies power to the shack. If you want to keep the audio on all the time. The idea was to turn the relays on .k c. it keeps the LM386 happy. and other odds and ends. If you connect up the TI R controller backwards. Notice the second 1000 I-lF capacitor near the LM386. Use small shielded cab le . A set of holes is included on the board to turn off the audio ampl ifier. but this shouldn't be a problem. as I did. The result would be a constant tone in the receiver. and powe r conditioning . and "audio on .. First . To provide reverse voltage protection to the TI R controlle r . After this diode comes the 4700 \.272 Misce llaneous parts include resistors . This will make troubleshooting easier.. The value is not critical. February. . but I was also gelling reports of missed first characters. L. You can adjust it to your liking.. You may either use the PC mounted trimmer to adjust the volume of the sidetone.50 + $1.&=~-~ A T/R Photo Inside of 'he proto. IC sockets.IF capacitor.e WB8VGE 2225 Mayflower NW Massillon OH 44646 A Station TI A Cont roller Last month I mentioned a project every ORPer should have in the shack: a station TIR controller. In sma lt QRP projects. Don't tcrqettc include this capacitor . but it should work . . use a 3-amp diode in place of the 1N400 1.t cep RS 272·135 471lF AS 272-1027 10 lJ. to be able to mate w ith and con trol the vast amount of receiv er s on the market.u" ' *"h . I had practically no delay left. • .ohm resistor and LED are included to let you know the T IR controller has power applied to it. This is a classic design using an LM386 audio amplifier chip . my station is a bit different 'rom the usual ham shack. You may even be able to qet by with an AC powered wall transformer .. You might worry about the diode surviving the inrush of current to charge the capacitor.. if need be . This is one of the benefits of the T/R controuer complete versatility. The prototype worked quite well. I had to design it to work in anyone's station . audio amplifier.. To make things even better. na relay (a good choice would be RS 275·218). Four LEOs keep you informed on what is happening with the TIR con troller. transisto r 02 is turned on . til "0". I had to do some real soul searching on thedesign of the deley key ing . This might be the case if you can't find . This month we'll take a look at what is needed to accomplish this task . connectors. An LED Is also keyed along with the relay. When I started working on the etat ion controller. I've joined forces with FAR Circuits to produce circuit boards for this column (see the parts list for address). Notice the four relays. transistor Q3 is turned on. delay. you don't have to get your parts from Radio Shack. and they totally isolate the logic 'rom the external device . As a second thought .50 postagelhandling from FAR Circuits. _u. We'll start with the power conertioning part of the controller. junk box parts will do quite nicely. should the need arise. I supply coerating power for the TI R controller from my + 12 voll powe r bus. a short description might help." "''''0' . You may not need that much cepacttance. note the three extra IGs for the keying delay circuit. you can use a wall transformer to power the TIA controller. activating the two on-board relays . the money for Radio Shack relays . You c an useoneof the relays . wire. with Radio Shack part numbers. cheap. let the co ntacts stop bouncing. If this is so. I did not want to keep the tone generator running all the time. enren. I have to decouple any 12-volt device from the tz-von bus. and then turn the transmitter on . T here is one each for " power on. A 47(). and efficient.ype of 'he controller. I chose relays for several simple reasons: They're cheap. • vo. as long as the unit can supply + 12 volts with at least 500 mAo The large 4700 I-lF cap will smooth out even the nastiest wall transformer power supply. These are very bright and look nice in the case I chose 10 use. use EXTREME CAUTION since you'll be exposing yourself to the full line vollageon the back of the board . the board layout is very lIexible. Also. However. . This tone generator is turned on end off to follow the keying . The Audio Amplifier The audio amplifier takes the lowlevel sidetone and prov ides speaker level audio. When the key is closed . A blank PC board is available tor $6. .IF capacitor via the 1N914 diode. This controller uses relay switching to control the external devices . but don't lose any sleep if you can't find the exact amount listed here. if you do this.F cac RS272·958 or 1000 IlF RS2 72·1047 470 \. without know. In the TlR controller. one the TIR controllers I plan on using in a transceiver has only 2200 \.Number 19 on your Feedback card Low Power Operation Michael Bryc. You can use eithe r rad ial or a xi al capacitors for the two large electrolytic capacitors listed . or a panel mounted control. A 4PDT relay can be used with no trouble if you don' t mind the rat's nest of wires coming from the contacts. keying the transmitter.IF of capacitance. Photo B. you provide keying voltage fo r the sidetone generator. the oecoununq is in the form of a large electrolytic capacitor. YOU 'll notice several extra IC chips . 62 73 AmafeurRadio Today . PC board. This grounds the reed relay. If you decide to panel-mount the volume co ntrol . " CW keying. nothing will happen. easy to come by. LEOs.ln fact.Q92 10k PC trimmer AS 271·218 or 10k pa~ pot RS 271 -1 721 4700 liF cap AS272-1022 1000 lJ.F RS272·102S PC mount reiays RS 275-219 reed relay RS 275-233 metal ercrosore AS 271). Rear view of the TIR controller in a Radio Shac. This is not the best route to take . 18N640 Field Court. I' ve included a parts list for all major components. By the time I fixed that problem. The relay contacts switch from receiver 10 transmitter... My receiver needed Ihe mule line isolated from ground to receive.. you mule the line 10 ground. • FIgUre 2 . ReITlOYe power from the board.- - . you 'll Mar a lOne from the spealler. •• • ". a good etJOiCe would be a Radio Shack 275-218) in a small aluminum box. Set both the pitch control • and the volume control to micHange.P WB8VGE • . Aemove Ihe clip lead from the key-in terminal. S'a'" 10 An lsh The TIR controller is best bui" in sec- lions. Apply power to the board.. ... The relays should pull in and the TIA LED should be on. II all is wori<ing. "fler checking over your work. Primary consideration will be in tha eraenne switc hing.. . mars about all th$ space this mont h. but the added convenience 0 1 keyer selection. and transmitter. III FEB.. I use RCA jacks on the back 01 the TIA controller. Ant_ Connection Perhaps the mos1 difficult part of building th e T/ A controll er w ill be deciding how to connect it up to the rest 01 the equipment. II you installed the power-on LEO. ... r . 1 used a six--posilioo switch to select six differ.12 volts 10 Ihe antenna control relay . computer or whatever to the key in the term inal . pemaps ne xt month we'll have something 10 control.. Not only do you get total automatic TIA con trol .. Don't unplug me soldering iron illSt yet .. and reed relay 1oI1ow the keying . ground the key input.. too. I-~II ~ ~- . Well. grounding this point will turn 00 the TJA controller. it should be on. connect an 8-otIm speaker to the output terminals. Foil diagram. To mule the reeeiYer . 01"18 o f the on~rd relay supplies switch ed +. After a short delay (delermined by the sening of the delay control). relays pull in. • •• ( . Again. straight key. This should make the reed relay also tum on and off.. Use a small wire and connect the sidetone out to sidelone in terminals together . enl inpuls l rom the l ront panel on my TIA coruroner. Key the terminal onandotfW'iththe clip lead. Use a clip lead and awly + 12 volts (gel this nom Ihe + side of the 4700 ~F capacitor) to the side laM in the tenninal. . O. The first place to start is wilh the power conditioning componenlS. February. receiver. • . 1991 63 . supplied Irom the TJA cc ntrcner.. Apply power 10 the controller. Now you can see why the contacts of the relay have been left uncommitted._- . You might have 10 add some 0. Sluff the components lor the Sidetone and audio amplifier second.- .--- -.. 13 Amateu( Radio Today . The CW LED should also lollow the keying. The sidelooe should sound. Make sure tINJ audio power is hJmed on viti the PC pads. Parts placement. L. Sel the delay control to mid«nge. 9 1 7 3 s.. 1use a second relay (Irom tha junk box. Now that you have a TIA controller. Ground the key input terminal." ---. on the board. the relays should drop out and the LED should go dark . The second on-board relay mutes the rece iver. This box contains 50-239 connectors an d RCA jacks. . Figure 3 . so I can use both or either type 01 connector on the end 01 the cabkts from the antenna. .loIlowing the keying from the terminal. if purchased . F/9Ufe t. The control voItege is +-12.01 and ' 00 pF caps on the input lines 10 keep RF from gettil'l9 into the circuit. The box is mounted in an out-of-the-way place with a control cable connecting the antenna SWItching relay to the TIA controller via a twoconductor cable. Finish stuffing the resl of the board.. . . . SChematIc for the TIR controller.. ff you conned your keyer. and just pick the ones thai I need . D. 201. No tuning of the filter is reSCO RPIO makes it easy to quired . the operator may net even be aware that a carrier has appeared. It features integrated circuits. Or circle Reader Service No. fully-illustrated catalog is chock full of components and periph erals.()918. Escondido CA 92033. (206) 775-7373. effectively reducdate heard and any pertinent reing the interference by up to 40 marks . add-on boards. The Model SB-4 is priced at 64 73 Amateur Radio Today ". blowers. switches and connectors. P .D. 204. (6 19) 747-3343. In addition. Dandridge TN 37725. If you already own the original PC-Pakralt. and unbe lievably low-priced com- PASTERNAK ENTERPRISES c February.• Number 20 01'1 )'our FHdbaoek card NEW PRODUCTS Compiled by Hope Currier AEA magic~Dotch ASHTON ITC The PC-Pakratt II has finally arrived! This program replaces the popular Pc-Pakratt program for IBM compatible computers. All material is available for " off-tha-shelf' deliv- "y. twinaxial adapters and connectors. stripping tools . Operation of the filter is indicated by a two col or LED wh ich turn s red when an interfe ri ng si g nal is locked in. HN. Or circle Reader Service No. It sells for $90. heterodynes in the ham shack toMFJ .O. with or withOut a mouse .O. Or Circle Reader Service No. day. mode. and quick access to the user's word processo r. Box 194.5m m..500 standard catalog items .O. complete par amet er sc ree ns. P. or J eCOMM. Contact Ashton fTC. this puter systems. A stainless eyebolt is provided for mounting . An AutoLog function can even record . epoxyfitled and sealed.. plus R8-232 all mode terputer generated RFI. Tonne and others. plus $5 S&H. and it can save and restore all 18K of PakMail messages to disk. The It can be interfaced with ICOM MagicNotch filter is also very useand Kenwood computer-ready reful in reducing the effects of comceivers. 1991 any variation in the frequency of the interference until it disappears. Designed for icNotch"'. It efintelligent scanning. coaxial terminations. patch cords . PC. at the feedpoint of multiband dipoles. Lynwood WA 9S036. UHF. The filter activates in less than one second. The width of the notch is extremely narrow so there is no noticeable degradation in the quality of normal speech signals. (615) 397-/}742. Box 830.. the MagPlus Input/Output). It is a powe rful prog ram that takes advantage of AEA's exclusive Host Mode .hits" to disk during a scan. insulated S0-239 connector and wire leads for the antenna or ladder line. coaxial euenuetors. Contact AmeriCan Design C0mponents. Ben Lomond CA 950050194. $75. In many cases . (201) 941-5000. Upgrade Ho t Line: (206) n 4. PALOMAR ENGINEERS Palomar Engineers has a new addition to their high power balun line: the Model SB-4. you are eligible for a S40 discount off the suggested retail price of $70 for the new program . Power capability is 2000 walts continuous power at up to 10:1 SWR. catalog contains many new cable assemblies tha t utilize 3..8 to 30 MHz.or other carriers. The filter is powered by 10-1 4 volts DC. SC. which is beminal units such as those manuco ming an important source of f actu red by AEA. Box C2160. The co mpact 5. Irvine CA 92713-6759: (714) 261. Easy indexed for shopping. When interference of a build databases (log files) which constant frequency is detected by can include a received station's the control circ uitry. CW signals. regardless of when you purchased it. AMERICAN DESIGN COMPONENTS A new 1991 catalog of electronic . Its other feat ures include user-friendly help scree ns. fans. 202. Or circle Reader Service No. Contact your nearest dealer. SMA. rechargeable batteries. The filter operates on the audio output from the receiver as obtained from the external speaker outpIJI . signal level. _ Pasternak Enterprises catalog #1991 features a complete line of amplif iers . programmable enenuator s. e J-COMM Ashton ITC has announced a new com munications soft ware J-Comm has introduced a new product called SCORPIO (Shortaudio fitler for use by amateur rawave Computer Operated Radio dio operators and SWLs . offers a full aso logging feature and a DOS gateway. waveguide adapte rs. and convert the resultant file to a database. mo ld ed breakouts. The introductory price is $100. coaxial cable assemblies. (BOO) 7763700. 7mm.Pakrall II very closely resembles the original program.5" unitis housed in a gray and blue aluminum enclosure. disk drives . The balun is weatherproof. locatio n. and offers full Host Mode support for the latest PK-232 command set. It includes pricing on more than 2. P. wit h caused by negligent operators simultaneous automated digital tuning on or near the frequency. coaxial adapters. cutting tools. so current users should find it relatively quick and easy to make the switch. For mor e information contact Advanced Elec tronic A~ plications. Or circle Reader Service No. modems. based on a fectively red uces interference flexib le database search . time of operation. FAX (619) 747-3346. Bldg. P.N . Kantro nic s . Box 16759.5" x 3" x 1. with 'renon". This 48-page. and more . 205. For more information contact Pasternak Enterprises.2006 196th S W. 815 Fairview Avenue. This is an automatic authe sophisticated shortwave lisdio notc h filler de s ign ed to te ner and mon itor .1920. The built-in 2 walt amplifier is sufficient to drive any 8 ohm speaker. coaxial switches. Inc. Contact Palomar Engineers. 4 · in diameter x 4 · high. Box 4 5 5 . SHV and MHV connectors. agen(SCAF) is automatically tuned to cy or type of service. coaxial detectors. SMC. The filter will continue to track may be sorted and searched by any category. 203. PC-Pakrallll wor1<s with IBM AT & XT compatible computers . coaxial cable. the internal identification. 0 & P. power supplies. electromechanical and com puter-related part s and component s at bel ow factor y out let prices is now available from American Design Component s. SCORPIO includes a comprehensive User's Guide and a sample database containing 100 of the most popular HF utility and SW broadcast frequencies. No mod ifi cat io ns to exist ing equipment are necessary. mice . . is specialty designed to operate at high SWR so it can be used in antenna tuners. This balun. The program includes the latest version of AEA's PK-FAX program. 206. TNC. and to convert from ladder line to coaxial line outside the hamsnack. P. coaxial connectors. Or circle Reader Service No. SCO RPIO i nst antly re move hete ro dy ne breaks new ground by combining a RM from SSB reception. (408) 336-3503. push-button attenuators . as well as technical informatioo. frequenswitc hed capacitor act ive fitter cy. the catalog also features a large assortment of computer products such as mon itor s. wh ich is usually obtained from the accessory connector of t he rig. signal decoding and data capture.1722. macro facility. 5MB. It has a 1:4 impedance ratio and operates efficien tly from 1. FAX (714) 26 1745 1. BNC. Fairview NJ 07022. that frequency. These databases may contain thOusands of entries and \-d B. ....95 "'fl'"'' $29..~ $39. 225-400 MHz... )'OUr interf_ . GAITHERSBURG.'\rn' C&4I12l!1 programs VIC-2O _ Mol ~2 <ac h 1".. Ret urns 10 re.. . '" ordc:t: QSO So ftwa re 208 Part ridge Way Kennell Square.o ld srpara lcly.>Stions a Ulornllllr a lly 'ol'lrrtNi h~' t he proRra m frum your ...il h Ihr rn l l~ qU"l'''" pool. dh<•.. COACH G AN D G i.00 comp<l litM... • 0""" pIoI"".. il<cIuded .. ••.....ell a~ C Ulnmerrial H" dlo Tr l\'J. ..: Areceive only cartrid{le lor CWo RTTY (Baudot & ASCII) lor use with Cornrnodonl64J 128 Operaling program in ROM...eak est a reas. .on/I B\I ur \lari nlosh gra phin printers. SWl... ( ien eral...lnl r .95 ForC64orC128... erslOng program lor "se .eonsutl laetory.. RX: _ C111CL£ 169 Ofl RUD£1l S(JlV1CE CAItO RF POWER AMPLIFIERS TE SYSTEMS NE. Comrnetdal... ...95 anonedlsl< perc/ass .au AD IIft'd 10 "". ts 13. AIR·' : A o...95 VEe SPECIAL EL E C T R ONI C S O F MAI=lY LANO c..1'1""1.... line ur .. PA 19348 215 -347-2109 aSK $59. <nolo f "" to "' ~ ..... _ "'"itt or ~Pr'_ IO.SPECIFICATIONS TE SYSTEMS new HPA Series of high power amplifiers now available through select nation al distributors. ..6 60 UHF 15 13. All un its are designed to ICAS rat ing s and meet FCC part rp reg ulations. 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RTTY {BaudoI&ASCII)and AMTOR.s _ por _ .hts ...... :.. automatic T/R switching . ersion..1 12 13..1 12 13. ·I'r" Rra ms are a... .otls mu Illple '\l udy _ .. ..l and_ I .omplele inlerface syslem lor .5" and weight is B ibs.. 1·2 6 Hz..... dware 80Itl .6 29 N Freq ... also available ..... ...he l>Om... Operaling prcgram an . Conlinuou$ duty repea ler amps also available. aHahle r"r :-.."I H M r....ow~"""puI".:.. $39. ".. $69..6 55 UHF 15 13. • (:~a ln r and oml.. exa ms as .6 50 UHF 25 220 .i'h . Consult your local dealer or send d irectly for further product info rmation... .. T_ _ ' ..""" ..m. TE SYSTEMS TE SYSTEMS eo..8 x 10 x 11.'k e.. Milrtary (28V).95 Typeop.h"ne and C"mml'rdal Ra da r End" ' Sl'mr nl . · Ublaill .. ns and a llu... . lor use with 1t>e Commodorti 641128 compul8l"... riuen on F:p<.-d "'''''''0'... ' AI AIRDISK: An AIA-1 • r-.. tor use wilh Commodore VIC·20 Ope raling progr am in AOM.. .l and 'eeeive on CWo ATTY (Baudot & ASCII) and AMTOA.4SO MH z amplifier.....uur un lhe 18 \1 . ...~~~~~~~~~i.95 I'n« .Wl WATTS (144-148 MHz) I..e_ _ (_IC<) _ _ . .U il '-'SO T1CTOII ... CA 90025 (213) 47800S91 CIRCLE 232 ON READEIl SERVICE CARD . etc... ..l Compulc-n a nd $199.. Ad.SSS _ _ . ith minimum 512 K........ .." IB'I r . Pro~ram Features : • R U II~ on IB ' I Perw ""..U or " n.. . s resuming al a "'leI' li me.. 1OcI'< AJR--ROM: C&r1ndge-sion 01AlR[)ISI( "l-' .) MORSE COACH: A complete leaching and leshng lIfogram tor learning the Morse eeee in • CIIrfridlle· $49. 1 1>7 1ouo1-.7 14 13.IIoQ:O hI".. k. _ Po MOlH'I MHz In put Output 0550G 50-" 05520 50-" " 400 25 400 14500 144-148 10 400 1452G 144-148 25 2252G 220-225 44500 44520 ~ ". T~r hn ld an... mi• . All ampli fiers are lin ear (all-mode) . iIloor) .. Thermal shutdown protection an d remote control capability included.. ilh minimum 256K RA' I or 'bcinl.. Bo_ 25845 Pow...-w. "'.specify 10 MHz bandwict1h!ol" 42().1"... and incorporate optional GaAs FET preamp.I k .. Earh p"'Rr am ... . but it still has a rising frequency charact9fistic. AM is great. trying dllterent mikes and level senings. but it was triCky to align and required lots 01 camponents. Well. although it is sllll full .lherewasatime. (More on this later. ex0essiY8 high Irequency response makes a noisy. Although not ill common use. But you 've heard it said that FM sounds the best. ir'l9xpensive filters have dominatad the scene. but many are supplied with power Irom the rig. By the way. Is it too late lor phasing? Maybe not. which has the facility to allow receiver filter selection independent al mode. the prime considerations were cost and avaitabililythe ordinary parts were cheaper and easier 10 get than a good Sleep filter. But set's start where the audio signat starts: the mike. at leas! on this side 01 the now-rusty iron curtain . (Thars also the reason for the great Irequency response. You can avoid it by clipping off one sideband. all condenser mikes require DC power to run the preamps. your miceochoree characteristics do have a great muuence all your eucc. Some have small matching transformers i n their c abi ne ts for highimpedance use. It worked fllle . Their sound is qUIte a billess tinny lIlan that !rom the ctyStal or ceramic types . though . as long as the received signat levels are adequate to prevent noise on the demodulated aut· put. Unlortunately. The dilference is that they are used in the generator mode: the output from the voice coil results from the sound waves striking the diaphragm. and even used successfully WIth solidstate gear. The power fluct uates. Some have small ceuenee. They should have approximately the same tonal balar'!Ce. are supplied with condenser mikes. These determine the e xact frequency at the signal sent through the lilter. NO! only was the transmilled audio quality a point of pride. the vol tage output 01 the mike rises with the audio frequency. and !his pitch is the resonance at the liIter. I had the opportunity to play with the new Kenwood TS9508 HF rig. by means olleeding their DC power through a transformer and pumping audio into the other side. in a capacitor-like arrangement. not all that long ago. Electret co ndense r m ikes have the smoothest frequen cy response 01 atl. See you all next month. There are lour types 01 mikes ill cammon use: Cry stat mIke . smooth condenser mike.ent mode. the phase relationships had to remain constant over the req u ir ed band width. If the two sound very different. Tuming them will vary the audio response lrom tinny tobassy. causing horrendous distor· nco. bordering on the unin telligible. So. Also . February. The mikes are somewhat tinny and harsh SOUllding. the modulation mode (AM . your rig may need adjustment. yes Also.) II you were allowed 15 kHz audio banctwidth and wicler clevie"on. In order to avoid having to make atl the t ransminer stages linear. and in some rigs you can hear it by tuning in background noise with no signal. Ge!erKS1UM <. they can sound line on the air. AM is especially prone to this kind Of problem. that's about it. almost·ringing sound associ ated with SSB. What no one even realized thell was lIlat the technique held the promise 01 sounding eenee than a filler. since it dilutes the tiny signal energy across a wider bandwidth . In !his method. So nny Yes. Some radios incorporate the EO into their speech amps. and there you have itAM . it is not directly related to high frequency response. and high·precision versions are all en used in studio recording. 66 73 Amateur RadioToday . crystal mikes also have a limIted lile. it comes from the trad. so it sounds a tittle less clean. often on the same wire carrying the audio. and the punch 01 a tinny mike is not needed . the high-frequency roUoll can be rather gradual. you could sound jUSl like your local rock and roll statlOfl. That is. At last I could confirm whatI'd always suspected: The cleliciency seemingly inherent in SSB is actually caused by the sideband filter. home-built stetens are rar e .imple and easy to do. resulting in c0nsiderably more than 3 kHz audio bandwidth . and produce far less output than their piezoelectric cousins. and there is one lor each sideband.f. Early sideband rigs used a technique called " phasing" to generate and receive SSB. FM modulators and deI'TlCldlJlators can be made very linear. most new ngs come wilh condenser msces because they are small and inexpensive . and the old one you gat with t hat hamtest special may be shot.kes have the preamps built right into their tiny cases! Even WIth the Circuitry. surpassed only by the local weather andQTH. Is this true? Yup. sse. but then you may as well just go to SSB.) The AM mode is s. these mikes sound very natural . 73 Amateur Radio Today WGECenrer F(X(Js. modulation is modulation. and wow. but it doesn' t have to be. Most FM rigs. depelld on the prezoelectnc euect to generate a voltage by flexing a crystat. SO they start with natural voice quality. Is there another way? Yes. Natural voice quality is not the same thing as maximum intelligibility. modula tion is usuall y accomplished right at the finals.) Because of their flat frequency reo sponse. And withoul a sideband tilter. Ask any AMer and he will tell you that AM sounds much better than SSB. all the while striving vainly lor that "peefeet " sound. XMIT Modulation omerent modulation modes sound dlllerent. Sometimes. weak FM signal even worse. 01 course. Why are we so concerned about how our radios sound? Well . Speak Into the Tr an sducer . It is lar and away the most power-ellic. They have permanent magnets and voice coils . ts this true? Well. The minute changes in capacitance w h i c h result Irom the diaphragm 's flexing can be detected with an FET preamp and converted into an audio signal. it sounds constricted. which means low distortion. Yet we continue to diSCtJSS and adjust our euoo.) Finally . at least under local condltlOflS. so its effects are dou bled.• ASK KABOO. Altagether. Any such steep filter wiM ring a linle bit. They are not likely to be exactly the same because the two skirts 01 the sideband liIter are never perlectly symmetrical. most conclenser m. Som e exotic headset-type mikes use ceramic elements to great adVantage. the receiver's selectivity liltering eoee not degrade the audio. and unlike AM and SSB. a somewhat hnny mike gelS through HF OR M bener than a natural . Unlortunately. for onething. Of course there is always some audio pnase distortion with a transformer . so it is important to set them carefully . It's illegal. AMers?) But iI's more than that . or insutficient all emate sideb and suppression andlor distortion could result. I tuned an SSB signal in. the IF bandwidth in FM receivers Is quite a bit wider than the nansrrutter'e deviation band width. Remember. A M. But it does sound a bit odd. With some equalization . (Multipath and lading distortions make FM a dicey propost. and it is actually older than the way we do it now. But then. good and steble phasing circuitry should be Simple to accomplish. it was also a legal concern. there's not much to interlere with the quality 01 FM. Dynamic mikes are preny rugged. but it sounds real nice. Th ese mike s are inherently lo wimpedance. and you couldn't count on Kenw ood 10 ens ure you we ren't breaking the law bec ause 01 excessive h igh freq uency response or distortion Today. To me. More than anything else. and so does the output power. Check the service m anual for Ihe carrier oscillator ad justments. because the clipping filler will make it sound lhe same. Until a tew years ago. In tact. as long as there's a matching transformer eerween the mike and t he rig. Road Hancock NH 03449 Why Rigs Sound the Way Th ey Do One favor ite topic you can hear on any ham band at just abou t any hour is the good 01' " How' s my rig sound?" Sometimes it seems like an obsession. though.Ooc"'~ The Tech Answer Man MiChaelJ. not at aN. of course. and they are a bit less tifllly . Recently. however. Switch to AM and the note wilt be gone.imilar to the crystal unrts except that they are less likely to fail WIth age. including HTs. SSB-is it bad? No. 1991 sse FM does sound great. transmit and receive signals at the IF level were split 90 degrees out 01 phase and combined in a special sort 01 mix9f to cancel one sideband. Bandwidth limits had to be observed. SWItch between the two Sidebands and note the sound. The manual should cletailthe correct pr0cedure. Ceramic m ikes are s. no. The symptom of a bad one is eldremelyt inny or distorted audio. What _ olten overlook. They have a high impedar'!Ce (SOk ohms or more) and are mostly found wllh oIdef l ube gear. Remember that the sideband IiIler is used both in transmit and receive. and it sounded normal. and the audio is adequate lor our normal uses. An easy way to check is 10 let the ng warm up lor about 15 minutes and then tune to where there is only band noise and no signal.tion of nomebtewiog. At the time. is that the sound 01 a Iig is dependent upon lar more than its microphone. II you listen carelutly. they don' t need much mass. and rarely ever lail. it sounded exactty like AM-much crisper and bnghter and altogether more pleasant. It appears to come from the resonance 01 the sideband lilter. though. which is required by law anyway. In fact. !hey can be great WIth tube gear. SSB Filler Ad ju$t ment Ilyour LSB and USB don' t sound the same. you can escem a definite pitch to the noise. They use a permanently-eharged diaphr agm (the "electret"] between two electrodes. one or both may need adj ustment. The great part 01 the scheme was that Ihere was no sideband filter. Many an hour has been lost fruitlessly tracing signals through perlectly good audio stages when the real problem was a bad crystal mike. Incorrect adlustmenl can result in poor ad}aoent sideband suppression on both transmit and receive.YO"" '". but why is it 001 In theory . the ettect can result in excellent " pu nch " on SSB. We all know that. (In tact. Dynam ic mik es are built somewhat like small speakers. And then there's selective l ading. Also. the IF filtering cou ld be better tailored to avoid that tight. because it includes and demodulates both sidebands. the amount 01 received noise is usually greater than wit h FM . Becau se their diaphragms don't have to push against anything. FM) and the method used to achieve it determine the limi ts 01 audio quality. the inherent noise-canceling ettect of FM makes it seem especially clean. Then I remoWKi the liller. the liltering does cuI the sse high frequencies all rather steeply at a kHz. m0bile HF rigs and most VHF units ca me equipped with d ynamic mikes. AM isprettydamed good. As a result. With tccav's technology. even when the signal is precisely tuned in. Despue thIS. phasing rigs have disappeared as good . and is the worst. and in fact may be inherent in the radio itsell. there is. (Ar e you listening. III . they are the smallest mikes around . but it is negligible by VOice communications standards. when one sideband fades mor e than the other. when we hams built OUt own stations. and it shouldn 't make any d.tiOn lor HF. Then.tlerence what kind you use. . n at l n l from n e nby tran. as you know .. ... Bill points out that the manual lor Ihis teeminal calls lor 12 volts DC art ampere on one page. ask ing them if software applicable to the masses would be in the oiling. maybe one o f ou r reeoers will roll up his sleeves and write that program! CoCo ... a. Bolh 01 them are quite pleased wit h the PK·232.. nd w o rk w ith VHP' /UHF /FM/CATV opentlon• . 33s. 1 /8 ~ thl ek he .. m ent procedures.ou rc . etc .. you can have me best 01 both worlds .1O 01' • . y eh • • • I.". r .... me so long 10 get up...... most 01 the appl icat io ns lo r gen eral purpose (not dedicated) rmcrcccmputera were just not suited to packet or AMTO R as con ligu red .. rmln." On anoth er note ... Gem ini..I have a nothe r leite r here trom Bo b scnacmreuet WA21KS .. _..t lty . -_ . .. 1. " No. Norm . as soon as he gets a Balr dOl ' 0 ASCII conv e rsion board.. _ DU. .. Hl(h paaa flIten Dffer • e1e. nd Receiving CW Norm Boles WJ5Z 01 Las Cruces. There are e no ugh others 01. nolicing that some 01 the o rigi nal work on d igital modes wa s done on Motorola (6800 and offspring) m icroprocessors.... the besl bet lor pac ket is to use your com puter as a powerful te rm inal... Thanks for Itle tip.. he has OOloced a paInful lack of pado:et softwa re lor the share wa re p rograms .. and you never know when your obscure question will end up here in prinf lor everyone 10 see! Ne~t month. somewhere . he is now all compuleriled...C.. a's just that no one to ld me about it. I wrote to several 01 the pioneers.. he shou ld be i n b usiness .... prie. Panasonic . A marginal supply just won 't do here.. be sure to use a power supply that can supply the lull ampere. Model 430 Serl.... Bifl.. ha. Hope the info rmation hel ps.. . with one 01 the many terminal programs .. .. . . is Irighl· emng enough! Sold" Sn ifter Award The RTTY loop 1991 Solder Sniffer award candidate this month is Rob lahora of Burl ingl on . Aga in .. t al n t... . There are several p ublic domain or N_ Mexico. A company just cannot afford the developmen t and marXeling costs 01 a program thaI may rec eive only limiled support from me community.. 3 " unit .. co m p le te wit h manu a ls (n ow that' s a find). . and that is exactly what I hea rd . cornmercer or pu blic doma in. leslie wonde rs il th ere is a way that . I couldn't help m yself!) III o-..nd bto eUni . Thai way.. H ey Rob .. . Yes . renc.. tandar-d..l .". is particularly interested in copying CW on his computer.... To a man . r .Uon . N ew Yo rk .e to antenn a t .". and hope lor the best. is a beast to align but a workhorse onc e it is. Ullit....ffordabl... Illinois... He fina lly go t it to perk a long.. 28s. ests you. .. are .. and it is still in use tod ay as one ot his hard copy machines.-er.... but the lact remains that there are more C-64s and PC dones in ham shaCks than CoCo's. leslie wond ers wha l his Blue Ch ip prin ter IoolIs fike to other programs. Indu. hard~.-u·. t . . ... _ """'.. Get In Touch As a lw ays. ... at ttle above address. 19s. Mas$8chusetls .. . I don 't know .... th at is... . th-e CoCo is a l Ine machine.. With a C-64. the Btue Chip is one of a series of prinl ers w hic h em ula tes the Epson MX-8OIfX-8Q standards.. ... Notes t-ern youngsters like you keep us all hopping And thanks for the stamp on the leller.'. ri".. a packet termi.. to do the ha rd part. II so.... Silver Reed . I rema in available 10 your thoughl s or such via mail. . . and a Blue Ch ip printer. -... . thous.. diffe rentlallnterleren ee fllterlni. such a program is re latively easy to wr ite in BAS IC. Rob wriles that he has Ilnished the TV1000.. Leavey. yes . Puzzling? Not il you consider the size of the ins talled base 0 1 com pu ters am ong rad io amateur s . Bob. . and In teet.. ...el hardw 11 In o n e 2 " . He found thai if you run it al a tad less than 750 mA o you gel all sorts o f weird rewlls . 7 5 O b m..D.. . essentially no commercial ones...."'. He stales thlll to his chao g rin. Like many "bcses" which come into the shack these days. There are several CW practice prog ram s around . cion' . lIihtnlnr. packet softwa re reaches back many years. . proteetlon l-.". Oh...... all things conside red... _._ . usuall y because 01 hardware ccnstratnts...ture and . .. ... M..Avu-. -_... way to blo ck b e qu e n d .2501) or Delphi (user name MARCWA3AJR). I' ll pass it along here in " RTTY l oop. my search 10.. whO speaks to my recollection 01 the Mighly M ite printer. . ·. Again . Wantrap model..ppllance re.. we ll •• below lKl Mlu.. Good luck. That I'm old enough to have some put away . b!Jt noted an inleresl· ing quirk . d d l tl o n . I queried some 01 th e eottwere houses.... but. Now. it's not a bad idea to pick up ajun ker at a hamfest Parts a re hard to come by and any source wo uld n't hurt! Thanks tor the tetter .. Id e clo. and he hopes to obta in hard copy trom his c o mputer prin ler while using the computer on RTTY. so il it's cossible... Several years ago.• Ind h ldu a U y b o:xed with mountl. .. an d found that it an ad justmenl was otf a few thousan dths of an inch.m1tten from disturbing TV and V CR aeta... . or on CompuServe (p p n 75036... 11.. e "trifle. . Cote d'lvoire.ane Ballimore MO 21 2Q8 CoCo Packet Here in Maryland. " 0_. 1 compon entry to a tt e n ua t e ._... p e n"... il there is a demand I will print on e here.e ~­ .nd use In North Am. h l e ld .no_ ."""'_ . Okidata . ..Oy mount. Th is is not to say that someone. .. hopelul'y I will hear about it soon enough . He asked il it were poss'ble 10 convince ham radio software writers to g ive some serious attention to wfll lng comm unica l ions software lor the CoCo.. d id not write a p rogram 10 put the 6809 (the CoCo's CPU) on to packet.. He is wo noerong il there is any sou rce...r . He pu rchased o ne about six years ag o . Colorado. . Inlerf.. relates being an avid reader o' '' RTTY Loop" who has a special i nl erest In the Tandy Color Computer. and I will say up front t hat I have otten been as frustrated as you are .. Receiving CW is enotber matter . as ... ... . .. Well .try • "ommon mod .. Bob also feels that if you pla n to get a MIte work ing ..U _... he ca n print on the printer bot h the transmitt ed and received d ata while using me split screen d isplay of Hamtext. o f Olean .. . Who knows . engtneering d e OJJin In th . eneloaure with Iroundlnl fe. 0. and allow a dedicated m icrocroceeso.. e m .RTTY LOOP·""O""""""""'" Amateur Radio Teletype Marc 1. offe th.. for packet softwa re lor th is computer .. • OOUDU ' K """"KDU~ K >0 _ _ _ ....C. . M.."OI_ ..E.. as it now lies frozen on the Qfoond. .. ••""_ t" . they responded . Michael..nd • • Iandud I . """.. making the lack of support by th-e various commercial software publishers very puuling...._ . I love hearing from you . . . Bill is using the AEA PK·232 wil h his Leading Edge Mod el D computer. Yes . but only if more than one 0 1 you asks for it.. . l .. below 5 0 Mb • .. and at 750 mA on a nother . M i Chae l S imm o n s WB9 CWe o f Char1estDn. nal. the PK·232does nol come with a power supply.we. MIchael notes tba t ttus computer ha s evolved in to a rather soph istICated machine WIth lull teatures .. I will gu ess that you can't. but if the manual does nol say so. ... I'm gl ad l he years have not blunted your initiative in th is c ral Y hobby 01 ours. . . there is no men· tion ot Blue Ch ip. a Flesher TU·170.. ". As it sits now.. With printer drivers like Epson. published in the June 1985 issue 0 1 73.in a box. . went throug h the ali gn.". .. only "omplet.. I would call it an ecsco. sit here looking at my beautiful doublet antenna that lO0Io. Hamle ~t cartridge... and re member when 5 eeors was l irst class postage. 1991 67 . To stay on the sale side.." It seems th at.. In .1 1 there wit h similar setups..W7KM DIWIlE H Xf KSAXW) 01 Boulder.".. il you can find one.. February is the month with the reputatiOn of blessing us with the most snow Of the winter _So....... wide lin e of 7~ Ohm Hlih Pan FIlte . to the bast of my knowledge... and a friend of his is a lso usi ng a PK-232 with an Apple 11 + .." ' .... AnuuATIO. please let us all know how things work 00< PK·232 Qu irk A cautionary note arrived in the mail from B i ll W e at h e r f o rd W A IlN OF / TU4Ca. and I hope 10 tlear from you aga in. .d Or hunl from ..E. you can be sure n f pass if along. and Europe h njDye d iood utta In ta"kUni th e h TV1 pToble with I. Bob seconds th e com men t that this machine. The Mighly Mite From the newest to one 01 th e oldest-machines . . holatl on . peeltlc In t e r fe ri n g .. II's been quite a few years sinc e I've seen the 5 c ent amateur radiO stamp . but no one has written th e p rogram-yet! II I hear something. I agree that the CoCo is welf-suited to the task .. miss 73as " RTTY Loop" Ma rche s along . e o n n e e to T. mang&]o .. Problem of the Month Th is one comes from Leslie Bruce WIlOX (e ~·W9BS R. • • 1-800-1CE--COMM CtIlCLE 1 06 01\1 MADER SERVICE CARD 73 Amateur Radio Today ' February.ot.tlon ehoklni. from ... WA34JR 6 Jenny I. let' s haye a look al what inter- Copyi ng . one othe r point M ichael menlioned in his leller... and 35s... Leslie states that alter many years of Model 14s .. Welf. the lilli e fell er wo uldn 't work p roperly ..... .. I have Iool<ed and lound nothing.. (So rr y . --~ .. but il the Board of Bar Examiners also required "I can understand . &. and he may soon lake the Uniled Slates to coon. which Ihey are entilled to do. . the man responsible lor the FCC decision 10 relax CW lasting standards in upgrades for the harKlicappe<l. I would net see any sense in Ihat. How would you leel if the firm you were working for hired someone who used thei r handicap 10 gel out of taking 50llb 01 the COOrse5 you had 10 pass in order to become an allomey? Montcur. Much to my ecrpnse.ter or a word processor . What we have tned to do Ihese past several months is 10 provide a good cross-section 01 the views. Bau er: But you may get on Ihe air and nevef have to figure out an Ohms Law lormula! I guess what t am trying to lind an answer 10 is .ant 10 wa ive the code l or me or anyone. or unlil the FCC decides the complaint in my tavor ..ay a repeater is run? one Calilam ia coordination council says that the lime has come to recognize the users 01 repealers as the supreme beings.ewed by Newsllne correspondenl Steve BalJ8r KCClHF. finally writ ing a Ieller to Presiden t Bush. What follows is lhe transcnpt 01 an interv.. Congress passed the Americ ans With Disabilities Act.with proper medical C8rtJIicatiOn will nol be required to pass Bau er: How would you respond to a handicapped person who had passed a code test. and th en swim.IU8t": LeI'S assume lhat you have passed the slate bar and you are a pracbcing allOrn. I sup90s8 in future years I might decide that I want to go lor a higher class. the bill was signed into law by President George Bush. The code l eSl simply does not meellhattesl. at my address at the top of this column. : I would lirsl congratulate them on being able 10 pass a code test or use a manual typewriter. But of ecorse it will be.oolr. They didn't . A Civil rights official would really oeec to deal .ck C8rd LOOKING WEST Bill Pasternak WA61TF 28197RobinAvenue Saugus CA 9'350 Meet Peyton Monlcure In the October issue we inlerviewed Tom McM . by law!!" persons. Iem there. for example.ng Ihal people migtlt like to gel invotved in il. a prolessional occupabonal thefapist who uses amaletJr radio in the rehabilitatl()fl process.. they may have relegated repeaters to ham radio public utilill9'S. a nd gettit"lg the FCC to eccecr my civil rights complaint . fAn audiocassette of Steve Bauer's inte rvie w with Peyton Mantcure. as we e~plore this issue . &. . by law!1 8IIuer : When the FCC to-manaes their ~ proposal concerning waiving upgrade CW tests lor handicapped About a month aner steve Bauer interviewed Peyton Montcuee.] rneecmnes Epilogue a d d it io n a l co d e tests .ew that a ired dur't"lg lasl summer 's second " No-Code National Telecoote-eece Radio Net. and I imagine that the cocIe standard will be done away with lor lhose who cannot operate a telegraph key . that would be f. we inl erviewed April Moell. A week rater.. In other words.. To a man who leels thaI no tlandicapped person should be required 10 pass any form of Morse code tesl for a tlam liCilel a nywhere in the world . communications . but l can use an electric Iypewr. I shan not start studying unlil at least the Americans in Disabilities Act passes. R'dt Yarigian N6PVP. and that requires accommodatiOn in communications. and possibly ctnere..l"l8. One day I thought l hal l would wrile tothe Fee-because I had some tIme and 1 thought il would be lun 10 get into ham reoc . Anc:I I can undersland. But the objoect here is 10 arrange for the handicapped 10 com municate like everyone else. From the No-Code Te leconference Beu er: Who is Peyton Montcure and how did he become interested in amateur radio? Montcure : I became it"lterested in ham radiO years ago when a ham radio operator came to my house wh en I was slill a child... .00 postpaid from The Amateur Radio Newsline. and that [usnties e~cluding individuals who cannot pass it. will you try the 5 wpm test yoursell? Montcure : I expect that the Ameri· cans Wi lh AC I wi ll be passed by Congress very shortly. and in doing so. that the FCC might like to pass a law saying that people who .. In the December issue .y. l99 1 the individual 10 run a marathon. the question was whethef the handlCaPPEld person is otherwise qualil l8d..tlan W83HGW. Just how much power should users have over the .. But live words per min ute is absurd! Bau er: Have you done any studying lor the theory part 01the lest? Montcure: I certainly would notwant 10 start studying lor the thing until I know thai I will be perrmlted some day to operate ham radio. I had recently allended a tatk Ihat a ham radIO group held suggest. such as USing a key which is irrelevanl to voice communieations. tKJirtKJ for air over repealers 8nd on nets." Mot"lICure was inlerv. I intend to file another c ivil rights complaint. This has opened the way lor Peyton M ani c u re . and one 01 the besl ways to do this is to get them fully into transportation . . That is very importanllo the operation 01 amatetJr radio gear. but I am just a beginner and when you are a beginner you want to start at the beginn ing .lor e~ample.. thaI I cannot use a manuallypewriler. maybe some modification to some other part ollhe test would be appropriale.. giving as a reason that the Americans W ith Disabilit ies Act ot 1989 has not ye l been passed by Congress.here do we stop cutting? Where do we stop diluting the requirements lor not only amateur radio bullor other things? Mont cure : In the language of the 1973 Rehabililalion AcIthat Congress passed .. No COD or credit cards. and canoe.ith that issue. being blind. I went 10 law school and began 10 get very mterestec in iSSIJ8S related 10 the handicapped . Either the FCC win change ils rules so that the code will be . qualify without learning the code are absolutely forbidden from using a code key. because we are certa inly not talking aboul any physical handicap. Now it is really up to the FCC. Some can do it. Ironically. thai the FCC might like 10 pass a law saying thai people wno cannot operate a code key.Number23 on your F~b. and g ave me a little introductio n. deWA6!TF III . are absolutely lorbidden 11"1)11'I IJSing a code key. Th e FCC apparen tly has a bailie going on internally as to whethe r they are going to keep th e code or not. and who do qualify without learning the code. I cannot see how someone who did not know electrieal theory coold be quahll8d to operate a ham radiO staliOn. Bul handi_ caps 00 vary 11"1)11'I individ ual 10 individual. cawed. is available for $5. Bauer: The commission has recently announced that a handicapped app1icant-atter passit"lg a 5 word per m inute code tesl. The poinl at issue here is this: III a m in a wheelc hair ou tside the FCC building and want 10 gel inside. I frankly cannot imagine any prQb. Do es I his change the FCC rules e nough to basicenv salisly your need and make you happy? Monlcure : No . and some can't! 11 you can do ii. 68 73 Amareur RadioToday • February. line. and who challenged you on your particular views reg arding the handicapped and code testing ? Montcu r. &. and their owners 10 becoming unpaid service prOvider$! Join my guest COoWl"iter. : h would Qepend on the particular coorS8$. il was l he same problem with physical coordination . Bauer himself is a handicapped person. Rather . this does not satisfy me or make me happy. theobjoect is 10 integrate the handicapped «uc Ame rican society. that is lor each one of us to do individually. to again challenge me need lor hand· icapped applicants lor amateur licenses 10 pass a Morse test al any speed. Prepaid only. Naturally. Ed. Since the n. Again . I went through college and my learning disability was diagnosed. ccoe Next Time Around " L.. I gave il up and lorgol about it and went on wit h my lile . Now we come 10 the OIhef end of the spectrum. or I will end up liling anothef compla int Atter all . They have since rejoected iI . and indeed shoc:k-because I thought that so much progress had been made regard ing issues lor me handicappecl-I lound that the FCC would not even accept my comp1ainl' They did not even appear to know what a civil rights compla int was . Only time willieli. and do certai n other physical exereses.toria/Of· tee. As soon as that bilt becomes law. I was very interested in it-but I cou ldn't use a telegraph key. and in Ihis case. if it were loundthat I or some other handicapped indi vid ual could manage me key i n order to broaclcast. why should I have to learn it? h just does not mak e sense. each separate lest must have a reason behind it that justilies ii. Bauer: Whal class 01 license would yougok><? Montcure : I would ooIy be inleres!ad in alairly basic license. It's not the job 01 " Looking West" 10 pass judgment on the issue. I found out . So emphat ic in this quest is taw studenl Peyton Montcure that he has taken h is demand to lhe Unoted NatiOns.l wiU liIe another civil righls complaint. C8rtait"l1y I WOUld want them to take the coorses that are necessary to practice law. and not to restnct them by some arbitrary or capriCIOus standard. and possibly the federal courts . in a nationally televise d ceremony. a ived for the handi.Iuer: Thank you lor your time . As soon as il is passed. I lound that I simply couldn'l coordinate my m uscles so that I could get any SOr1 of rhythm or speed.Iu er: What about the lheory part 01 the tesl? Should that also be waived for anybody that claims a disability in that area? Montc u re : I can 't see What sort 01 disability would necessitate waiving any other part 01 the test. 11 somebody coold present informaliOn proving lhat lhey coold not handle some particular part of the test. would they tell me that I have 10 get up out 01 my wheelchair and struggle up Ihe steps at 5 or 20 Sleps per minute? Why can' t I use the ramp? III am handicapped and cannot use the code at all .ing West " will be back in April to d iscuss the rights of repeater users. But I mar'lilged to work my way up lhe cha in. Heterodyne Headache #14.256 \\ h~ li<olrn I" ....rrir..,.~ Sa' e ,our ~ ...... ilh \fall.ic:\"l ch: Get fas t relief with MagicNotch • • -'-'-""'-' '''8. • _ ... I~ 8 ,"Y 27Omoh 8...... 8.4... 8.4v 10 .8\1 BP-23 BP-24 Introd uctory Specia l 95 • S-IIl X e.n'" "on'" "nd,'r .. 10 ~ <• .-ri<r. \' flU ...... 'Id ... th. on l,- ....., in lite pi l...., .ti ll ,,"p, i "II I'" • Ih ..l"i,.... 12 \, 11(.'_ ',,011, .... i1.I>I.f...,m ,I,••"" j udo, o n )'ou r "II. cumputer bird ies a nd nlh('r vlmilar QR\I! plus $5 shipping & handling CA re,illent, pica"" . dd ,.Ie, l a ~ {:. II I" d . ,- lo r .. rn... rd ... d,·m"..... r . liOll ! I~.O . ~ ~ $99 nx. hd e rod ynes caused by t uners, ca r riers, C \V, Box 336 • Ben Lom ond, CA 95t.H15 • (-1081 336-35113 CIRCU 2 10 0frI RUOER SERYICE CARD AMATEUR RADIO EQUIPMENT CALL SOOmoh 10.8v 13.2\1 BP-22 Itft.....It... timt .. biW........illll 7_2< $14.00 $ 15.00 121 .00 SOOmoh SOOmoh BOOm" $23.00 121.00 $22.00 $22.00 526.00 270mah BOOm. . BOOm" • 1 roI<.or LUI ........ fill~r _ .... l ~ . Mallk all)' removes a ll j-Corn • [)(>pt. 7 • f:.il.~boi"_IIM ~ orlloM"""", • (· BP-2 BP-' BP-' BP-7 BP.., ~. • t '.I,- a a l _ir. '" .. , ICOM BATTERY INSERTS e e l ~m 800-942-8873 Your Best Price Authorized d ealer for Icom, Kenwood, Yaesu , ASTRON, Belden, Bencher, AEA, Cushcraft, MFJ, RF Concepts. Hustler, Kantronics, Wilson, Diamond, Ham-I 0 , Lars en, Wm. M. Nye . B&W, ARRL, Ameritron, Ep s o n, Fan Corner, DTK ute nc . For 1057 East 2100 South, Salt Lake City, VI 84106 801-467-8873 7.2< 7.2< PB-2 1 PB-2 1H PB24 Tabs PB·25/26 9 .6... 8 .4... 200m. . BOOm. . BOOm" $12.00 $15.00 $15.00 $18.00 SCOm" YAESU BATTERY INSERTS 10 .8v FNB-3,I3A ,2< 7.2< '2< ' 2< FNI>4I4A FNB-1D FNB-l1 FNB-12 BOOm. . $28.00 soam.. 127.50 600mah 600mah $15.00 S30.00 S30.00 soam.. MORE BATTERY INSERTS 270rnan Tempo Sl Early Ternpo S2J4iS u !e Stat1dard BP -, $ 19 .95 121.00 $ 19.95 $ 19 .95 SOOmoh 270m0h soam.. Ten-TecBP1 San- Tee I/ 142fl1 1....TIlbs Azdetl 300 TabS Be....t Regency MT1())J Tabs .. -Add $3.00 Shipping BOOm. . BOOm" BOOm. . BOOm. . $22.00 $15.00 S20 .00 $1 5.00 (VISA' FREE Catalogue TNR The Battery Store 279 Douglas Ave., Suite 1112 Altamonte Springs. FL 32714 1-800-346-0601 CIRCU S H Ofrl 1Iu.D£1I SEIIYJCt: CAII'D ClRCU: 6 2 Ofrl RUDER Sl'RVIC( CARO 108-1000 MHZ RADIO DIRECTION FINDING * Interference Location * Stuck Microphones * Cable TV Leaks * ELT Search & Rescue - - - - .. -.' .- tJ DOPPLER SYSTEMS. INC. P.O. 80" 3 18 19 Phoenlx. AZ 85046 (6 0 2 ) 488-975 5 FAX (6 0 21 488·1295 CIRCLE S3 Ofrl ~UD E R SUVICE CA~D For all your ham needs ~ ~ B __ vl.2 More Features, easier t o run. Si mply the best! 0 00 Pac ket-GOLD Is stili the best so ftw are for .ilEA TNCs, (p k2 32, pkaa ) and you r f8M Co m pa ti ble, More features: Direct malldrop acc ess] Co n l e re n ce b rldge lor roundtab l'll a n a e merg e ne le ' l Auto matic ses s ion conlro l (with manual over, de) m ake s multl-c o nnectll a snapJ New Technology (patented) converts any VHF or UHF FM receiver IOta a sensitive Doppler shift radio direction finder. Simply plug into receiver's antenna and external speaker lacks. Models availaNe with computer interface, synmeseed speech , liKed site or mobile - 108 MHz to 1 GHz. Call or write lor details. r....f pa Ckel-G O LD Check price s, then call us. We are competitive with all the big boys, and offer sa me day shipping on items in stock . Use ou r to ll-free lines. Trade ? Yes, we give the highest trade-ins for ctean, saleable equipment. Call for quotes. ASTRON/MFJ/ARRUNye Viking/MIRAGE! KENWOODIYAESU/CushcralVLarsen Antennas! AMECO/ICOM/Bencher.lnc./SONY/HUSTLER 1-800-441-0145 (IN TEXAS) 1-800-527-2156· ask fo r Ham Dept. Continuous monltorin9 e ve n while eooneeleg means no more wo nd ering ~wh.t' . lIolng en" DOS shell , Hu ge sc ro ll b ack buffers tncludi ng p revious •••• lOn., cut a nd paste led between s essions (also between modes on pk232). Brag f iles , quick connects , name log, ••sslon len saved and l o r printed , laclfeal call si9 ns supported using our quiek-eonneets. multl-hop NET/R OM usage a soap, manual or al.rtomalic. Easy to run! Clear1y , we have many more l e.lures, but our softwa re IIj also easy 10 learn and us e , You 'll be on the air In 5 m lnutas with our quick I llrt guid e. Comes with a 7S-~g e relerenee manual" sl ep-by-ste p lutorlal. OUr us ers ea ll us 10 say how grealllis. We agree! Orderlna: For PK88 , PK2 32 H K232 , and IBM eo m pallble eo m puter $S9 .95j CA re a add 6.25%) pru l $5 S" H. InlerF-lex Sys ems Desig n C o rp .• P.O . Box 84 18, La gun a N i gu e l , CA 92 60 7-6418 Phon e: 17141 496-6639 - Ca ll o r write l oday. VISA " Ma s\erCa rd weleome. CIRCLE 17 ON RU DER S [ RYIC E CARD Omar Electronics Inc. cW... 7XY Rt.1 Hwy. 81 South Loganville, GA 30249 (404) 466 -3241 Om., W A8 FON 'E' A l inc o Amentrc n Pro ·A m CfRCLE 1 33 ON READER SERYICE CARD _ ~ MFJ Kenwood Yaesu Uniden ""'"' ~ Marc N4YHM AARL Be nche r ICO M Van Gorden , Numbet 24 0t1 yOUt FHdNek can:! BARTER 'N' BUY Turn)'OUt old ham and computet gear into cuh now. Sure. you un wait lor. hamlest 10 try and dump II. but you know you 'll get a far IT'I(lffl re ali$bC; price ~ you naWl liout where 100 .000 active ham potenti al ~,can _ ,I tha n It1e lew hundred local hams who come by a flaa market table. C l\eck your enc. g araga. cenar and closet shelves and get c ash lot your ha m a nd computet gear before it's too old to sel l. You k now you' re no l going to use il again , so why INve it for your widow to Ih row out'? That stuff isn 't getting any younger! The 73 Flea Marker. B arter ' n ' Buy, costs you peanuts (almost)-eomes to 3~ a WOfd lor ind ivid ua l (noncomme rci a l) ads andS1 ,00 a word IOf commercial ad s. Don't ~an on telling a long story Use abbreviat ion s. cram rt in . But be honest There are plenty of hams who iov4' to fix thi ngs. so il it doesn 't work . say so. Make )'OUt list, count the words. including you, call. address and phone number. Include a check ot your c,edit card number and eXPIratIOn. II you're pllICIng a com..-cial ad . include an addillonal phone n umtler. separale Irom your ad. Tlws is a monthty magBZlne. no! a daily newspaper. so fig ure a couple ITll;lrIIh$ before It1e action SWlS; then be prepared. II you get 100 many caJls. you prictd II low . II you don 'l get manyaMlf;. 100 high . So get bu$y. Blow the d U$l 011. check ~ out. make sure il st. works right and maybe you can help make a ham roe ..coc,.... Of retired old fi..- happy Wllh lhal rig you're no! using flOW . Or you might gel busy 0I'l 'fOVl computer and put logether a list 01 small gear/part' 10 send 10lhose interllSled? Send YOU' ads and payment to the Bart., 'n ' Buy. Donna Di Russo. Forest Road , Ha ncock NH 03449 and QM set for the phone calls, CH...SSIS, CABINET KITS SASE, K31WIC , 5120 Harmony G' ove Rd., Do....' PI. 17315 BNB259 SI LVER REED EXp·400 DAISY WHEEL PRINTER. traetOf teed , cutsllHt 1Hd. $210 , Seikosha SL-8OAl. Upon ponl"" $210 . low hou... ,",e ~. OI'JgInal eattona, booI<.s. cables. (20 1) 583--2380 Of (1 18, 361-9080 ON"'" A ..... TEUR R ... DIO CLASSIFIED Qu.lrly 8uyISallIT. - P ....... fllOn T....... monthly. last ad circulatiotl. l.Ma .~perlI.IW. _ 10 read II\an 0I hef1, Alb: 25 cenlS1wotd, SubtcnPloons: $1'llyr. POe 2"S-S. Jonesboro GA BNB263 30231, HAM RADIO KI TS,. ASSEMBLIES for vari· ou ~ OST & 73 conseccncn art>Clss . Wo also olfol books and s ~ct'onic compononlS. For c. tolog. "",nd legal sino SASE wl"S' PClStagEI Of $1 ,00 10 A&A E"lIlnae, i"ll. 252 1 W La Palma Al\Bh&lm CA 9280 1. BN826-t ,K. PERSONAL COMPUTER INTERFACING Prw;to;al insnumant automatIOn. neI\IoOf';<ing and control~, II'lCIudH'lO m...." ......... ~ 1f'llIats, A 3--day. I'Ian<»-On ""Of'qhQp ill uoa Virgonoa Tech campus. W........"". D .C.. and Charlo!le NC. $5~. Blacksbu'9 VA. March 21 - 22-23; WBSIWlgIon. D C.. J....... 61-8; Charlotte HC . July 18 -19- ~ ; .nd Blacksburg \lA. ~ 22-23-0?" Or . Roy ~ (1031 231 ~2I231 ~18 BNB265 aSL CARDS _ Look QOOd witll lop qual ity prinling, C hOOS& Slands'd dasigns or fuily cuslomized cards, Bollor ca,ds moan more ,elU,OS to you . F,e. b rocllu,. , sa mpios Si amps appreciated Cheste, OSls. Dept A. 3 10 COmrner~iaJ. Emporoa KS 66801. Of FAX. raQl,M/$l to j 31613-C2.... 705 , BN~ SUPERFAST MOftSE CODE SUPEREASY . SWlimonai cassone $1 0 , LE.AflN MOflSE CODE IN 1 HOUA. Arnazong ~ supar-easy ~. $10. Both $11. Moroaybacl< guar."t... F..... cat~ SASE. BaIv. Dept 13--8. 1196 C4rus.P_yFL ~. BNB531 S8-220122 1 OWNERS : 20 de t.,1ed mods which Include 160-6 rnetOf opeI.hon . aSK, + 8flh anced p .S. ~ rabafe fOf ~ rnod!I subn!,ned' 9 pagos of 3--500Z tecll inlo. $1 1 pos lpald ,-Info . SASE . BO B KOZ lA REK WAO?SOO, 69 Memorial Place. Elm...ood Pari< NJ 07407 BNB581 ROSS' UU USED Febru. ry (ONLY) SPE. CIALS : KENWOOO T5-830S $829 .90. TS. 930SWAT $1299.90. T....521A $-t29.90. T.... 121,t,. TSU ·" $5" 9 90 . $ 89 .9 0 . T....255OA $319,90. Tg.44OSWAT $1039.90; !COM 1C-R1O $-t95 90. IC-22A $ 13990.1C230 $ 139.90. " ' 1A $5 8 9 9 0 . IC·18 1 $ 180'990; YAESU FT·102M MAG sPPAOC $56890. FV·I02DM $239 .90 . FTV-650B $189 .90: COLLINS 32S-3 .15S3B.51SF. 2.3128-".S....2. AU ROUND $1599 .90. 3OL1 $999 90 LOOKING FOA SOME THING NO T USTED?? CAU OR S€ ND S ASE.. HAVE OVER 190 USED ITEMS In 8'Iock MENllON AD. PRICES CASH. FOB M E· STON HOURS TUESDAY -FRIDAY 9 :00 TO 8 00.9:00-2;00 P,M, MONDAYS, CLOSED SATURDAY & SUNDAY. ROSS DISTRIBUT· ING COMPANY. 79 SOUTH STATE. PAE· STON 10 83263. (200) 852-0830. BNfl65.( ec.n WRITTEN EXA"S SUPEREASY . M. 1TlOI'Y .ids !rom pal'CfIOIogk"~ cut 8'Iudy~~ . Now:e. Tadl . Gen, $1 each. AI;I. v8l'lQ8(l. E>itra: $12 each. Moroaybacl< guar~ tw. 8aIV. Dept 73--8 1196Cit"" Palmbay FL 3290S. BNB69 1 ROSS ' SU$ NEW Fem-y (ONLy) SPE· ClALS : J ,SC. Afl.21 3 SOOFT. $ 150 00; KENW OO D TS·9"OSWAT $ 1919 .90, TH·15A $39Il5O, fH.225A $279 .90. fH.27A$3-t9.9O. THo315A $299 .90. TH-(SAT $m9O , THo 46.4T $33990, TH-41A $359.90, TH... ' B T $229,90. TH·31BT $229 .90; lCOM IC·161 $2229,90. IC·165 $2499.90. IC·125 $nO.90, IC.."H $939,90, IC-2SAT $305.90, ICo24AT $" M .90. IC-290H $449 .90 ; YAE SU FT· FT-411 E $299 .90. FT..., 0 10000 $39" ,90. FT· 147G X $109 90 , FT·33R $259 ,90 , FT·3 11RM $359 .90, F\I·l01DM $229 .90; TEN-TEC 585 $1818 .50, 562 $IM9 90, 222 $29.90. 2S2-MOE $129 90; MFJ 1218T $29990 , 94 10 $9890. 9490 $13<190. 812B $21.50. SEND S A,S E FOR USED UST. AU L T.O. (LIMITED m ,lE os. FE R) LOOKING F~ SOMETHI NG NOT USTED?? CAU OFI WRITE. Ove< 90391\aftt. .-....cl " - in stock 10f immecb. te snip. nwnl . 140 ,bOil ad PIioss cash. F.O S. PRE· STON. HOURS TUESOAY-FRIDAY 9 '00 TO 8 :00. '00-2,00 PIol . UONDAYS CLOSED SATURDAV & SUNDAY. ROSS DISTRIBUT· ING COMPANY. 78 SOUTH STATE. PRE· STaN 10 83263. (208) 852---0930, BNB109 ss-ec.oo. 70 73AmateurRadio Today . February , 1991 H..... RADIO REPAIR " ma~as, models, Ex· pe<ial lC8d. reIIabIa M<Vioe. Robert Hal EIec· trcnee. Bo~ 280383. San Fr. ncisCo CA 94128-0083 , ('*081 129-8200. BNS~ 1 WANTED : Ham aqulpmanl end Ofhaf prop.. My. The Radoo CkIb 01 Junior High School 22 NYC. Inc .. Ie • noo"'O~1 organiullOn. granted 501(Cll3}_us by Iha IRS. illCOiW rated WIth t1W goal 01 using It'le tM"" 01 ham , adiO 10 /uri"'" and anMnce 1M aducaliotl 01 young people nation...ide , Your property eenaliotl or fin.nclal aupport would be graslly 8Pflf acisfed snd acknowledged ...rtll s recei~! for your I•• deductible contribution . As 1991 begins. plesse look O\l8r whatsvar unwenled aq Ui~menl you may h.ve. andeall u, . W ~I pick up Of .n.nga sh lppi"ll y ou ..... race.... the tax daducllon. 00t rnos1 import.".. lha pIiviIeg& 01 knowing !hal YOU' g," really made • dol!elence in the aduealion and lIPbIio9"!1 oI.chiId W nII. . . u :TheflCofJKS22 NYC. Inc " PO eo. 1062. New VOfI< NY 10002. Round 1M clod< I«)TLlNES: VOCE (!>lSI 61~n.FAX. (51 8)S14 9600 BNB162 " HA" LOG" CO"PUTER PROGRA" Ful Ie.lu, es , 18 modules . AUlo-logS. 1·band WASlDXCC , Apple . IBM. CPIU. KAYMO. T",NDY. CRa $24.95, 13-KA1AWH. PB 2015. PoabodyMA OI960. BNB775 LAMBDA AM"'TEUR RADIO CLUB Inf.ms· tional amateu' ' adio club fOf gay and lesbian hams. 0 ...... I keds, monthly newsleff. r. and annu.1 9 ath .'ing at Da yl on . (215) ' 78 LAR C , PO Box 248 10 , Philadelphl. P... 19130 BNB81 2 INEXPENSIVE HAM RADIO EOfJIP..ENT . Send . - . . Qmp lor Iisl_ Jm BradyWMOSO. 3031 Aud,ory Or. , Gulonoa NC 28(15.4 . BN Bfl90 WANTED: BUY" SELL ""types 01 EIacIrof'l Tubas. Cal 101 ITee 1 (800) 421-9397 Of I (612) 4~7. C & N EIecI~ Harold Bramstedl . 811)01 EIlll W e Road . Hugo MN 55038. BNBm ELECTRON TUBES: All typos & sizes, T,. ",· mining . ,eceiving, micro...ave .. ,la'ge in· venlOry • same dsy shippi "ll. Ask aoout all' 3--500Z apecial Daily Eloc!r onics . PO Box 50 29 . Ca mpion CA 902 2" . (800) 3 48 BNB913 8661. CO.... OOORE 64 H..... PROG RA" S-8 di$k sodas _ 200 ~ P'O!I'_ '1 8.95. ~ ~ gMa UIlUS4.IaI soft\lIlIl . catalog 01 U!*IIeS. Gamet. Adun and 8<Jhsf'I DIsk. Homof.$pun SoItw_, Box 1064-88, FL3:l92$. 8N89 11 e.-..o JOIN GROUP 05r'I1 Ham . ' pedit iotl operat· ing in Soviet Ukrllinll IIeIp with 'fOUl SovWII Iicensa. 10<19 1"9. equ,pnwnl . t,. vel , . IC. by UB5WE KK4WW and UB5WE . .. about Sovial hamI. D Kong. 0SLing. equiJ>o mant, 1IIsaory oon. and much ~. V....,. inJormat $9 .'7 10 UB5 WE Vic!Of GOfokhousky . PO flo>; I . Bl ack sburg V'" 24063--000 1. BN8945 Audio.., WA NTED: Pr. l'i80 mic rocompul8f$ .nd public shons l or mu• • um , KK4WW. Dsve Larsen. Blacksburg Group . PO Box 1. Black,. burg VA 24063. (103)763-331 I . BNB958 WANTED : You, help donl ting IBM·pc clona. fachnk;al.nd ealibook. 1orIARN smergency , adiO se<Vice in USSR. I wiNper$OfIBIIy <laIiVer equi p m.nt to UB5 WE . D.vid L a..e n BNB951 KK4WW. (703)763-331I . 25_420 MHz MIUTARY AVIATION FREOfJEHCY DIRECTORIES for NORTH AMERICA_ 20.000 newly r l lllT'1ed islings. HAP3. Box 1501. FIooo IWiflIlool NJ O8!I22.(11501 (201) 806--7134 BNB958 FF1EE Ham <loafIeI T_ . SASE. N3FTT. 5 13 3 G r. me rc y. Clition HII. PA 19 018 . BNB960 FIVE WI.TTS I 30140.... f.. !,snsmiffer! Radio Shsck pari si Plans- '2 ~IU$ stamp! Bill laulerbach . 1109 North W&81 Ave., '103. Jackson "'149202. BNB982 PRINTED CIRCUIT 8OAROS lor projec18 in 13. Ham RadIo. OST, AARL Handbook. List SASE. FAR Circu.... 18N640 Foeld 0:., Dundee IL 60118, BNB966 a ...UTHORIZED AMIGA COMMODORE S-. center , Send SASE for pnce tsI. C8IIaI'tdaf EJtouJOf ..... PO flo>; 3113. 6aker8'Iown PI. lSOO1. BN8911 va SA TEUJTE "ONTHL Y AUDIO COOES 1 (900) HOT-5HOT. Inl _ .... fasting onty . $3.5O por o;all BNB976 W"'NTEO : Inst,uctiOn manual lor operating EICO Model 232 \lTVM . Meyer Minchen AG5G.4635 SW FWY. HouSlon TX 1102.1 . (713) 822-3181. BNB9n A..IG A. .. ACINTOSH . ...U RI KUXElST Amateur radiopublie clomaln soft\lI"'e. $-t.OOJ di$k. SASE lot cet8Iog. Specify compuleI'1 WMEFH. Sox 1646. Orangia P srt< FL 32081· t 646. BN8978 AlO£N seRVlCE by Iormar Iaetory tee:IIntdan. NiCadI $38.95p1u1I/'4llliO'lI. 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(8 14) 623-7000 , BN8931 WA NTED: PanaBOflic AQ.l OO c. _ _ junker IOf parlI, IolarvIn Me:-. W-tUXJ. eo. 2860 1. Allanla GA 30358, BNB982 CODE RnY Saod--R8C8Ive Disk \l1C-2O, Co 64 . send $5 , Tapa $6. Codowa,o , 80. 3091. Nashu.NH03081 . BNB940 NEEO a Sl C ... RDS? O u. . .re d;tfe,eo1! N4ZDU, G~1lIOf8I Printing. RI. 13, 80. 1151. Oldtown FL 32680 BNB963 OK.,.. SOFTW "'RE R.al-flrna Tarminafor on G' eat Circle map. sny locahon. SunrisorSuno eernmee. RangalBeann9 . Stor• . recall . p,inf maps. IBM PC & compatibles. DXAID Verso2. $20. Peler Otdf~ld , 80. 152. Piedmont. Que. bec. J.R I K• . C.nada , BNB980 H..... RADIO PATQiES Buy OFl trade. Send you ' club '. p.t~h to A8"V . Bo. 10 3 1, Ae,'ddsburg OH 43088 , SHRINERS Gel 'fOUl spiffy shouldal' p.atcII (Fez .-rth anlenna). Send $1 ,00 10 Voce 01 - I u" AAC, Box 1031. AeJI . . ... ..."OH 43088. 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With supplied cables . easily accessible adjustments, and a fron t panel dis play that will ligh t yo ur way Caddo Mills, TX 75005 Call us for great prices COMET dual band on and ttl-band antennas. CIRCLE 1 24 ON RE.... OER S ERVICE CARO ace to what's happening. Even Thomas Edison would have been Impressed. Then t h er e is the legen da ry lightning p rotection that Ben Fran klin could have used . Backed u p by our two year ligh tning warranty. Turn even a fli ckeri ng repea ter into a beacon - a ligh t h ou s e of t h e airwaves. The RC-96 controller will lead to a bright fu t u re for your repeater group. Oh yes. ligh t bulb not incl u ded . advanc ed comp uter controls, inc , 2356 Walsh Avenue , Sa nta Cla ra, California 9505 1 {408l 727-3330 CIRCLE 1 ON READER SERVICE CARO 73 Amateur Radio Today . February. 1991 71 ... 232 TE Syslems . Inc 17 R. . .'9 60 Elklronocs . W9INN Antennas Wi-Comm ElllClfOtIQ Wolle Com.. 80 • M & "I EI&Ctronics .. Inc.. . 38 63 20 • • 11 81 60 as 69 41 " ecea n rr . 85 248 Molton Electronics 35 231 NCO . 79 Ramsey Elecl ronlCS ..ing 81 84 Broadcasl Techn ical ServICe . 9 88 UFJ Enl8rpnsas 180 UlCroCompuIe< ConceptS 14 1~ Micro Control Specialrt_ • n 252 Modiand Tech"ok9 e1 55 231 Moraogell( lM . 23 T7 42 B. " .. You'll receive free product informatio n from our advertisers. . new .. Publ'Sh. . ."9 8t ' 41 • Bu'ghardl Amaleur Aacho Ie. oBuilt-ln NiCd Batteries When the Internal batteries are exhausted just croon one of theophonal battery packs and keep on operating' • 48 Memory Channels Each memory and call channel stores all information required lor repeater operation. . i.S ..8'1 OC. . 18. Con!mpuleCorporahon 69 Commurlicahon Concepts. ZCOCofporlalion 65 88 . THIS MONTH'S READER SERVICE PRIZE ICOM IC-2SAT ICOM 's expertise in miniaturization h as result ed in another remarkable handheld.. 85 87 AbncoElaclfOnlCS 14 ' I~ EllIcI'onicsCorporallon . 74 RadioAmaleur CallbOOl< 22 Radio E"9il'le<l'S 17 Aad ookrt ..87 120 V~ Gorden Engw eo "'9 104 V. . 87 TCElabs ....aled Radoo 83 16 A$tronCorporaloon . ADVERTISERS A. Elcellenllor autopatchingl • Built-In Clock The 1C-2SAT is equiWed with a 24-hour system cb:k. Inc.... . chargers. ...... 43 " Comtelco 55 Connect Systems .73 Amateur • 0 leOM READER SERVICE GIVE AWA Y Radio Today Just fill out the Reader Service ca rd and send it in...l)anl.EIeclh.' 251 • 80 156 99 121 10 15 12 148 29 233 2M 13 • 133 185 8 • 169 172 193 17 12 192 • 57 106 179 • 17 42 210 • 234 page Cable )(·pel1 a ...grl .' page 109 A&A Eng'n " ' ing .. 17 ' 35' 170 Buckmasle." 1fCS PlICific Cable Company... 41 Eng_"9 Consult. 1991 R... 85 Communicahons Elect'onlC 26 Communi(:aloon Specialist . 38 56 B u ck ma s t afP u b h s~ ... 255 Tfi9p I..e Syslems . • 38 38 C BC ity lnta rnaho nal .... C & S Sales. memory transfer . 38 • EllIcImnIC$ Supply 29 ' 148 Amenlron 31 4 AInodon AsaoCIoale!l 11 236 w~ 81 89 Wesl 35 1tNIU W~ 17 138 135 _ _ West n 101 AnI-. enna PmcloucIs 15 GG TE 81 " GlB EIect'onics .. 85 Phi'i~Tech . 247 Slanek . this monlh.1.II page 47 I.. Am. 13'.as W~ 38 90 AnI...oNe Cen1e<..la lCompany 197 B. 35 O SO SoItware . . · 5 Watt Power Oulput The IC·2SAT delivers afull 5 watts of output power at 13. February.nlClllioM Ifaesu Electronoes Corporalion .. • OTMFCode Memory 10 DTMF memory channels store up to 15digits each. . 55 l1amtromcs. ...S.. . ..nalional . .. Bold list ing .. .. Inc. ... 81 . Inc. 7'9 Glen Man . . Pu~... headsets and a wide selection of other ocucos are also available . .n Engil'le<l' ing 83 G. tone squelch and so much more. . 81 l1 amAadooToyStore .. n Rutland Arfays 55 Salel litaCily . •. .ink-Com .. . 81 101 Maxcom.. _ 65 Gap ..orMc Eng. ...ely._. ... .sers who hav e conl" buted 10 lha Na· lional Advisory Comm<l1" (NIAC).. .76" 80 80 P enphew . . .lnc .. . 51 Cellula' S8curily Groo p . Inc 51 243 " XU. Communicatoons 83 72 73 Amateur Radio Tooay ...shing 168 euckmasl8f Publishing 51' 7 Buckmasle. 253 AI. memory masking . Inc 7'9 Vanguard Labs • VHFCom~ 191 49 16 35 n "n c'" as • These advert ise rs prela. .. .. ~West 60 • " ssoc. 55 21 e &B . . 51 80 78 Norm OImslecl Amateur Radio • • 178 199 68 249 145 132 24 31 76 48 34 254 71 153 95 188 as 244 2SO 51 Omar EJectronrcs P. Inc 39 I. . .. ... 69 EIect.Inalcran Company 62 TNR .a mson 21 4 1 Ba'ry ElectronocsCorporaltOn .. .ng . priority w at ch .. 124 TexasBug CalChef"nlenna .hana Hamlesl 83 Inlerlle.. .. . 69 lSOlron 77 J~ 69 Ke nwood USA Corporaloon 5. Wnt 60 5 . .. Ide< SlJfllt & Sana.. . ..II page 183 Speclrum Inla. .lI..E 87 ICO MAme rica . 60 ' S!> Ma~ake Corpor eHon .. . 2S 24] "X U . .lnc . .. Inc .. The ICOM IC-2SAT includes a variety of other features like con venient scan functions .. ." 2 1' Ross DislribUling .8 .. . .. 51 So llwa . the IC·2SAT . . .C .19 1 AdvancedCompule.ea W&W ~ ..S . . . 1 C_ove Conlrol Pfoducts 81 Custom E mbloider y 35 DELPHI 35 DeItlI Research 85 Doppler Systems 69 ' Dorm E lI$l U ocrow <rYe 81 EIect..C .. . 115 TheAF Connection 248 The $M. . ... .al R.. 79 SmrthDes. . 10 be contac led d ireclly. • • . . CV2' I"... .. apevine Group . and one luc ky reader will win a g reat prize from ICOM. 49 $4 NCO . • • •• • • •• • 136 Unad1IIs Antenna Manutaetunng • • """""" Uncle Wayne' s BooksheIl U. . . . ... 33 ' Sens ible Solulions 49 SGC ."........ ..cahons 01 India na poh! . PaIomarTelecom 69 47. wrttIlimer functiOn. T7 53 Bar~er &W..Conlrol 71 65 Advanced ElectronIC Appbc al>oos ".ng 15 G & G ElectronICS . • Quick Tuning Cooltol Frequencies or memory channelscan be easily selected with the built-inkeyboard orluning control knob. • • •• • • . •. Battery packs and a b attery case. 49 SotNra'e Systems 11 Spectrum CommufhClIlOOflll 37 A. 65 Ouemertl ElllClronocs 74 Ouorum CommunlCellOn1l ..S .. ..-"O . •AdVert.teur Eledronic• ...It• • • • .. 60 1 ~ Ace Commun. . Syslems .. .. ISO TheRadooW""'.CV4· 1.a 'rlSl0rm En ginee.. . • Extemal DC Power Jack The 1C-2SATcan be connected 10 an enerera-te VOlt OC power suppty directly. . They waru a card. I' m L1slenlng Yep. We're tryi ng to cope with leelings 0 1 inferiOrity with bravado and big signats. But egos are On line here. sure. doesn't it? II you aren't going to babble the usu- B UR R RID G E." If we had more YLs on our oence I wouldn 'l need to write aboul how to have more inter. let me kr'lOW why. Don' l try to cram it on e a. you know lor sura thall he way you've been going about mak ing contacts hasn't worked well . We want to see who's best and they want to be loved . then we can go inlo the nuts and bolts. Billy Crystal eqllains why men and women can never be lriends. You' ll get me talking il you ask about some 01 the countries I've opflfaled from . " starts when they lirst learn totalk . too. backed by milliOns of dollars in monster antennas and multi·kil<:rNall amplifl8fS.) Sorry lor the eversoo.lk Much There is a basic dilference between how men and women com municate. Hancock . He won't be amused by your weather." you disagree. Fe brua ry . 04<ay. LeI's go abou t thi s logically firsl. . cert ilicates. SOl"! in the world to the ham you're c0ntacting? Ctue: It isn't you .. How many counties.x 5" card . mail it in an envelope to 73. even som e close calla with death . Now " . a note to women 's nobers. Who knows. town . Attn: OSL of the Month . Or about some 01 !he e_eiIing times I've had on the air. it's here " . How outrageous of Ham Com to stand up to these bulliesl f don" recall tha t ever happening before. Entries not in envelopes cannot be accepted. 1991 73 . putting it bluntly. WGE Center. antenna and so on. th e more lun you're going 10 have. They need a card as badly as a crack addiC! needs a fix. almoSI complelely untapped wealth we have available to us in amateu r rad io? Yepl Thai 'S about the size of it . il take s some seriOus habit breaking to e:ttange.OOO in today's donerertes. Go wild and use a whole sheet. And the bes. But how many really faSCinating contac1S have you had recentty1 Am I about to divulge some great secret? Some key to the hidden. etc. we might eventually even be able to talk with YLs over the airt Did you see When Harry Met Salty? Well. Fore st Road . I wish they'd spend more time on the air and less angrity l ighting l or their " rights.000 a ye ar tax-free in such " dona· tions. And I' m talking major feeble here . Is it any wonder we have so f_ YLs on our bands? Maybe you've noticed thai men tend to make a contest out 0 1 anything and everything . Second best is to use paper. and Vice versa. who have been work ing industriousl y to louse up the language: What lew wornen hams we have do not need any help with spitting up their contacts.. Can we men. our anlenna. you've been swapping signal repol'ts and Sluff . how big our rig. your usual recitation doesn' t cut the mustard . They don 't call the Cadillac the answer 10 America'a inferiority com plex by aceiclent. or are you going to keep right on just " broadcasting" the same old tripe? Unless you can get started actually commun icating instead 0 1 81lOin9 yoursell all over the world. And t want a well considered response . NH 03449. who are the ones with the problem . with a ded icated separate sheet l or every contact. what un you talk about? How about mentioning whal kind 01 wor1o: you do and then ask him what he does . Your best bet here is to use a computer. .". how we do in operating conteslS. You 're Jusl going to have to break a lifelong bad habit. Alas .n Don't T. DXers are well aware that DXCC is a se rjoue threat to our hobby and could wipe it out at WARC. Or my first hamlest (t938). the bands are going to keep righl on being a dread'tul bor e. that sure cuts down on your lransmissions.. They merely eliminated the code requirement lor the Tech license. iI will remove the lUI feeble excuse kids have lor not gening a ham ticket . There are a few ope in rare countries who nave been making a happy living off these egos. easy. most men never learn to actually talk with their wives . It's almost enough to get me to retire and do some traveling . the more he's going 10 enjoy lha contact. Oh . ot the Month Toenter your OSL. I have n't heard a YL on the air in monl hs! Where are they? (I'll tell you later . finally! TI'Hl FCC took the easy (and clever) way out . . With men ii's our egos on the line with every cont act. rent it . part is thaI the better you are to talk with. Th ey sort out the " green stam ps" in their daily mail. And they 'll spend whatever it takes 10 get the card. aI dreaatllily boring drivel. Thus illoIlows that the more you can get him to talk about himself. but I knew thai as soon as I mentiOned " he" lor a ham . RevelatiOn: It's him! Now. With women it's their hearts on the line. That W•• A Great QSOr When's the last time someone lold yo u that? How about it ? Have yo u setlied into a rigid. Whoo. You know." And !hal was 30 years ago. QSl. sidering that people who use the 73 73 Amateur Radio Today .Never Say Die ~hom. II's humorous. What change wiNthis make? Firstly . II' . Some tell methey send $100. Or the interesting hams I've know n. He reatly doesn'l give a damn what rig you're using. Will you start asking questions and Ii. Girls ditto. ego--driven one. Boys are basically adI'flfsarial and girts aren't. l am old enough so I can remember when hams used to send a dollar to assure a OSL. I'd nave a flurry oIlurious Ieners from mililant YLs. How about you? M. how elaborate our mobile rig. . or perhaps what he did eetcre he retired? TherE: are many questions you can ask that will open the floodg ates. coo. so that's more like S5OO. not an angry. h's a win-win SituatiOn. Now anyone reatly wanting a DX aSL wouldn't consider tess than a $20 bill. I've had some great adven tures in my hamming .-4 Iree passes lor the veodof area. Make notes on what your contact is tetling you so the neX1 lime you contact him you'" be able to recall the conversatiOn and carry it on t-ern where you lett off. thousands of old·timers are g0ing to be terribly ree-tecec.. esting contacts ." I've told you about the DXpedilioner who br agged abOut cl earing ov er $50. see how many readers write that lheydon't always agree with me. but lt'a true. Obviously you're going 10 have 10 make some changes. tening. boring format with your cont acts? How'd you like to have the hams you talk wrth disappointed when the contact is over and eager 10 talk with you again? The faet is thaI you can becom e an absolu te char mer over the air. My comments here are meant for men . I've established the obviotJs: The most interesting pefSOl"! in the entire wor1d 10 the chap you've contacted is him . The cnrerencee in their communications are basic afld biologic. Put the call in the upper left hand comflf and keep your contacts by call in a l ile lolder close at hand. since that's what Ihey've been saying would Inevilal:Jly happen. " Just to be sure .l'm going to be lis tening to see if you are able 10 change your ways. ever change? No Code-At Last! Okay. Well. Boys play with each other. Having been brought up from year one like this. N9JTM Hey. How many countries we've wor1Ied is a me8SlJre 0 1 our masculinity. Winners receive a one-year Subscription (or exte nsion) to 73 . How did he get involved in amateur radiO? Are his kids nams? Why not? Has be ever gone 10 the Dayton Hamvent iOn? What Olhflf aspects 01 the hobby has he tried ? Start mak ing a list of ccesnons which you've lound to get the conversation going and keep it by your log Step two is to keep your log in much more delail. In case you're not following my meso sage. We '" start with the most basic question : Who is the most fascinating per. and were thrown out when they still refused to buy tickets . These DX. 11 2m doesn't turn into a CB-Iype mess in days. alter being trained Irom birth to be the way we are. have no interest whatever in lalking with anyone . . ILL . got caught redhanded buying equipment . Nol even a 4" x 6" card. And then they were even angrier when so me 0 1 their booth salesmen sneaked into the paid area. Merely being women will make them interesting to men . .... hen u.d Applitation MOInUOll with schImatics (2S pages) W&T "" $139.. CA 95128 74 73AmateurRadio roaev CIRCLI132 ON READER SERVICE CARD » February.. CIIlCL£ 160 Ofrl READER SERVICE CARD .DTMF Decoder with M uting • Auxiliary Outputs . We've 50 totally avoided promoting O\. GO ES WEFAX.OTMF Decoder with Muting . IS being issued . but i1 doesn't take much listening before you discover thai the voice bands are busy and the CW bands oddly vacant..l i" . .arl al BW. Inc_. Thay used wideb8fld spectrum analyzers aod video tape .. pri"". complele jn f".Response Tones . which not mally of us have access to .e. uo rum introdu~ the Q totally intelrated Ii".95 ~ Mia o Computer Concepts ~ 7869 Rustic Wood Drive r:: c: ' il ': '/-. . Packet. Receive Weather Sate llite Sy'lcm ..ing a VG A fJi. "you" rull the counts and send 'em in.. Is this mar"I'8Ious rule change going IObfing us the 50. " nd .. LARSEN ° MFJ oCUSHCRAFT BUTTERNUT oPALOMAR KANTRONICS ° GOROEN WEST ° AMIDON 0ALPHA DELTA VAN GORDON ° KLM oTELEXlHYGAIN ° RF CONCEPTS YAESUFT·747GX · HF All Mode MobilelBase Call For NEW l OW PRICE! - SOUTH BAY'S LARGEST AMATEUR DEPARTMENT Serving The Area For S7 Years! Ham Maga2ines . We 'll know more a year from flOW when we Cllfl compare the change in ~ Iicefls.Easy 10 Interface .... .Day WWOInly Wired & Tested w/manual .. _ NEW ADDED FEATURES .y 10 Ie. 1m~C.. . I've gonell . d...Control RX . d"wnl()~ d o demo fw m our Bu ll e l. Call 603-525-420 1 and ask lor Donna DiRusso. Programming of KlflWOOd.. . . n a.. SSTV and AM Jignalson each HF band..Sat 9 AM-6PM (408) 998-5900 .n the time 10 coun t T he Pudding Will this new no-code Tech license opell the fIood9ates and get us into a growth mode again ? I hate to be 0 1' Doc Gloom. so a net or even I OX pillHJp would count as one contact . rel rieve.wfm S I ~U l l" S2IumL plUwidi ng pr " f. ' h~ud. We need to do something to revive all illteresl in CWoOur bands are spl it into CW and VOice subbatlds.lit~ at to.Remote BaselTape .. .1 fro m ~ull r I'C kcyh< ' a.Reverse Patch · Tailbeeps .. Techn ical Books · Test Materials & Info ° NYE VIKING ° AMECO oALlNCO AEA • ARRL • BENCHER ° CENTURIAN ° HUSTLER VIBROPLEX Shop Moo. G r~pevjn •. Total ly I n t e gr a t ed a nd Af'f'o r d a b le Weather Facs imile Syst e m Q uo rum Cummunic.'I"r> . 1020 S. I'M get 'em correlated so we'D ha.. This might be a good dub ae1ivity. W. L O r...can he (0"" on your PC fill".. As far as I know nothing like this has been done by amateurs before..-"m".play.. OH45424 iii. GOESf ~' ETEOSAT.·i th a few . ..mo . Myview: "_stood on a comet in New York and tried to give away ham tickets _ couldn't do it. Yaesu HF Rigs • Tailbeeps .12 VOC Operation .IJU . need to know how much activity we have on what bands . 513-233-9675 . . With no 5 wpm code test for T echa I believe we 'll lind that those we are able 10 interest in going on 10 General will be able to learn 13 per much easier.~~lcm for the receplion o f . "p..Dttiil. code system can Usually mast8l' 5 wpm in a couple hours. SSB..2. O AA and METEOR APT ( ind u<l i ng ". Suile A. BaseJTape w/Freq. Just want to know how many frequencies are being used lor contacts . -'.implc kcym n«c . Assign ditterefll bands to yovr members and get them to make 8fl hourty aetiYiIy coufll 01 CW.. AnY. A number 01 readers have suggested thai I start a new nalional Of9Btliza· bon and do the amatflYr rad io pr0mot ion which needs to be dona. I'd like to publish a list of the cklbs whictt have ahovm eoough interest in the hobby 10 help 'Niltt P'otects like Ittis.. • . 1991 • Aulopalth • User Programmable CW 10. "".J from " I"'lellc of up to U. The general public no longer has the vaguest rec0llection of what amateur radio is.Jc under (omple te progra m . nl in ~ f. The ca. djrcc.1 qu . QUEMENT ELECTRONICS Cf f] [ICOM I SHAKE THE MONEY TREE You can make a comfortable commission YAESU ° selling 73 subscr iptions at hamfests. . W. when . you 're goillg to have to either clean up Ihe ARAL or else take up a new hobby whan we lose this olle through neglect..95 . lCOM.. In send ing In reports.1I o[ ". Those lew hams who have sta rted r ig hi o ut al 13 wpm and avo ided slowef sp eeds have been able 10 muter the code in a lew hours insteact of l iving t hrough mo nths o f grind ing frustration ... No.Detailed Application Manual with schematics .. ~I cclilln o j ilF ~A FAX.. never milld how many stations are in nets. 1\ d~l~ hil.oull Inlelllgeni ON 10 .ing 24(...000 ~ hams a year the ARAL promised they'd provide? I laugh.' iew and print image. .ral Ieners recently fr om hams who've tak.9l). C""I"'t>lc ul ""FAX reception Images and Charts _. Closed Sunday 1000 S.n.If hobby !of the last 25 years we're now almost invisible . No.dlitc image.Programmable COS Polarities .il~_ CtRCLE 24 ON RUDfll SEll'YtC1 CAItO signals on a regular basis. with Quo rum's F". someth ing approaching a ectentme study.""lIle system.Intell igent r:w 10 • Rlmot. please mention if you're part of a dub activity (and the dub). ~h i n 51. ' I<"e. T X 7(~ )51 (H17 ) ~Hll-~H t.. $239. YOU 'll get everything you need ..IMMl .m~li"n ~nd ~ De mo f) " • • c. rd I>y c~llin¥ j H17 ) ~2 1 · 412211 u. elu lion) a rc rna<.. c'luc nq . " "". III counting..so. Conlrol & User Codel & Tim.Au xiliary Outputs . utile.l~ un your pcr>onal compu lc •.ion .Telemetry . can he oolorilc<. Bascom· San Jose. hi'" lu ll~ ...f'llll.. ... but I'H be SlJrpri$ed if this alone makes much diff8l'ence. I don 't need the aggravation that fighting the Leag ue would bring.. Some commercial studies of amatflYr band use t1ave been done ill preparation for pressuring the FCC to g ive them parts of our bands.c Me nu drive n p '''''a"1 all""" yuu to (a plo..11 Dayton. . . ...rdhlc . ~"" -. especialy 'lIfhen Ihe bands are oplHI.Control stetiOos were set up at intervals along the route to the peak.s and appropriate return postage are to be sent to the awards The bI 01 the Soviet Union" cilies is av». UI. inleresl in amaltur radio in Sarawak tes been revived. 91A8ZR (WA2HZR. The guys wlla Ila<l 'IOlunteered to be statklned . ACDXA. Ken. 1985 . Hassan. 9'-'61.: 9M2ZA. SPOli$Oled by !tie stale QOYei . Ken. 9M2GW.. optfIt. Gcx:ld Neighto AWard (GONAj.ULUU. SwanzeyN. Mann and 91ol6AF.igns and 19nal reporls1 11 you have an 8/lSWf." The applicanl IIu 10 prove conlaets witll tIlose /ofeigncoun11ies and SCwiel obIasts whiCh lie on the 90 degree ~. Bob (N2OO) ~ active from the miOdla to the end 01 No¥embef 1990. Special endorsements are availalJ.re active on the air. or pac ket.Z.f1J. TA. Please SASE or SAE and 5 lACs. on any band or mode. AMTOR. In aI cases the lee inCludeS surface mail return postege.WITS has. UA6W. PfO"'ided communication t~ lies during the Rally of Malaysia from S'9' ternbet' 1.. UA9W. 9M2AX. Due to lIiS ettorl. Autonomous SSR$: UA1N.taner ove r tlla world . From 9MB. UA61 . UA9J. " Advanced CommuniCahons DX Association (ACDXA). 1991 75 .. SCA·trophy is available tor tile acllieve· ment ot 500 cities. UAID.46.HC8 . PS.5 104Hz. ACDXA. 00.vente quesiiorl. ThiS event. outnumber 1hese by a tactor of at 1eas1 2 to 1. tSS6d wrth David N IGPH. W. the U·RTTY-Award will be issued to any amateur or listener wlla can prow contacts with . meter level. lhis is !tie Meand year in whiChlhe S8b8Il Amateur Radio Society IIu provided the service. and lhal hi should cal me 81 my"'" I fl8VfM1/outtd a cIub )'\ll with daSU$ g0ing on. UA9X. In 91. a1be ~ al a lffIry slow pace. in Shah Alam.160 at OBOO UTC wittlllis 0Sl manager. UA4W. More statiOos w~h the 91. UA6X. and WlTTY· Award. WouIdn 'l it fIl8ke un~ /ot73 Amateur Ra<liO Today to sponsor flam clesses at the e/emfmlary andhigh sc!tools in lhe New Hampshire area? David said Iflat II would. 9M6ET meets lliS OSl manager on 21. any mode not: abIt 10 write a oetaiIed f'llt)OfI. UAIH.re . bul only if fJ«II* wou/dn'llflink /hal 73 Woll$ doing it jusl to seI subscripI/OfIS IlIId Wa)flf " code /apes 8IIdSfudy mal"'. M the _ Cwu held f:1VeI two days. [tn fh6 loiIowing. UA'X Aulonomous oblas ts: . AI Soviet National~oes Award (ASNAI. Labuan end Banggi.acent 10 the necessary country. I would be glad to heat itl i l 73 Amateur Radio Today · February..ad Hwy. Then / asJ«<J my f. SCA and ACDXA Superb op/'lies.226. UMS. any mode • •• • . ACDXA Awards Program. Atw1y. 9U6MQ MIl reglJl.omOOon Cor· poration.. on each 0I1iYe HF bands. on radio amat. In the spirit of deveIopil'lQ lriendly relatiOns among nations and nationalities. 0rganized by lilt SaIlaIl Tourism P. The list o! counlries: AP. My under· standlflg from Offl" facully is Iflat Illere used 10 be a ham staliorl on campus for faculty and sfutJlnl$. UF. 9M6MU. 91. gives MARTSmembers tile opportunity to improva lheir llaffiC handling abilities. fter W.. In an ettOI1to encourage digital communication. Zainal.3 Bands···· • -15 Soviet Socialist Republics 20 autonomous SSRs 10 national d Istricts 8 autonomous oblasts any band ." was tonned m the USSR to ptOfOOle the lISU8I good things I/Iat radiO clubs try to do. One necessary contICl on each band mty be subslitltled for a (OIl1aet with llflOUltf country ad. app!icltiOn signed. AI ttIeM stations are aetiYe on fllOSI . W. HenI. Tem10nes /of ASNA: S<wiet Socialist Republics : UA.t tile peak Illd to trek up the moun18in from the base.HQJ431 Noles from FN42 s.. ur bands. Festus and 9U8PV. PO Box 1. in. but thaI I'd cfIBck. Tile ACDXA awa rds will be issued toany licensed amateur or Ii.. UA8V.I. e~cept that lilt second clay's !t"was from lilt resthouse Iocaled at the 3.. wen as toster inlemalional lnenCship and grXld d . Tlla applicanl Ilas to prove OSOs with5 ACDXA membera. Bolll are olticers 01 the association. Applicatons must be sent to the awards manager.ilable for a lee at 7 lACs or 31RCs pet' endorsement. and 9M6HFIlas a regular sked on 21. UAeQ. fewmoments /0 talkabout your interests . Wllal about. / wiN pos6 the same question IoALL !lams WHYcan'l flam mags. The applicant tw to proye ClJfllacts WIth 100 cities 01 the S<wiet UniOn.UF. UMP. 9M8FH sometimes cIlecks in wittl lhe W7PHO Net on 14.hould be on tile air seen. But ham fI/dIo !las not! An)OOdy in /tie Rmdge. UD. 9U2DX.10 Soviet Socialist Republics 15 autonomous SSRs any band. UA9G .. JA. MMSC also organizes 1he World Supelbike ChampionsIlip on ~bef 1. Most of the stations mentioned above have modest setups and only dipolea.eekenO$. who went ORT wl\efl he relumed to the slates leal November. Faizal. UMY. 29-35). YouC8fl filfliOr contesting ... UAIO. MoI1ammad.UO.R. U~ UAtB. UH.. DH. OK.S2 . See the table tor the basic award and t~ phyrules. Contacts mtJSl aI be made !rem the _ country. regulars on !tie aw are: 9M8GH.40. VS WlTTY·Award. This --.K.V. 1 leach al a smalllibMaI al1$ coIIeg6 in New Ha~ .. SCA-Supertrophy is available lot acllieveo ment 01 all cities wonced on the date of the _.350 al the sametime during the weekend" or course.. Hun .r _kend slceds on 21.yne.cceplablll. counlries as tIlose lor GONA-e&rIifi.lbliCS.•nd one p'rfiCuJar SfIK/y guide or the Dthttr? WHY is thai 8fIy dll1erwlt from 73 «QST or CO ~ thai the student usa ctIffdUl Sfudy mafflnilb? fflIS column is wpposed tozero in on intematiOttalflappenings. UD"N.oIcourM. New HarTf1$hirl. ACDXA·Supertroplly. ox Bands · · · 25 QSOs· • 51 asOs .O.. Tile ACOXA·Su· pertrOp/ly may be claJmed by any I'lclIder of !tie loIIow i. Held September 1-2. car stopped. an annual moun18in race up and (lawn Mount ~ (4. 9M6MA. UAIV. 9M6ET.. Irs qu~e amazing at how easiy .le for each additionall00cihes. I am Ll)Q/ «tivifiIS.. beginning January-l . lhese poor guys Ilad to do that twice.UA6E.. nd aetMlifl!) MAUYSIA HarriS Abdullah 9M6HF P. The ~ cant IIu to prove contacts wiItI III countrieS whicllllordeflhe USSR. Among them a. nd still be conslderale-8nd m8yDe even take.48 prafix . These are theatations I know 01 who are on the air frequenlly. He Iuld seen my callsign on my licfilflse plates and wonr:J9red if I knew of anylocal clubs offering /lam clllSS6S. UAIW. UF. with MARTS partlcipating. The ACDXA plaque is available tor any ap.BY . The SEANET Conventoon was a SUlXe$S. • numbef 01 amateurs . EP. any mode ••• .a... UB.. BY. ~ the ecrueet has been made on RTTY.IIITU·zones witllin USSR (19-26. Janin. . UP. operating the leat week of tllat month trom Western MaI. licensed amateurs and SWla did lheir part in community service by providing tile 10111 communicaliOn ucunes tor tile ClimbatllOtl. UA6Z.g: ACDXA-Paque. 9M6QQ.ard (SCA). UD. W .. Ac1iv& s18tions from 9M64and are 9M6M0. and myself. my f"ness /eM1er (. altraetWlg emateu~ from 18 COUntries . I had to Bdmillhaf I didn 'f.51 a s o s on each of 5 HF bands. WorlIing ttwougIll ~ is. WHY? WHY C8II~ ham radio magazmes and thttir empkJyees sp0nsorflam classes? WHY can'l lI'EI usa some 01 lhe magazine's resources to increase the numbers in ourwonderfulhobby? Don 'I many oIoorclubs strongly suggest toour struggling NoviCfl-to-be fIlal tllay purchasa OM seI 01 ccd# /apes or the other. W .. ~ 5PfJfl$OI' COI11esl$ and e~pedltlOfl5. Eacll COl"ltaet muSl be COf'llirmed inthe lorm 01 1 0Sl card received by the applicant Basic award Trophy USSR 51 a s o s· 51 aSOs~5 Special endcreements tor any band Of mode are available The GONA·plaque will be issued 10 an ~ plicanl who has [been able] toprove ClJfltlCls witIl .. Senny {YlJ.JT . UA8T. zin" USB t!leir integral ta/enlS and resources to inc"a~ lhe flam population of the world? You teN us wh6tllBr flammagazines sh<lu/d or shouIdn 'f be abIs 10 $pOfl$Of !lam daSU$.able from !tie awards 1l'\VI8OIl'. and who canbe heard mos1ly in the evenings (0700 UTC onwarOsl· Other stations are abo active on Ihe HF !larldS It other timeS. Eacll application must be accompanied by a list sllowing tile dates 01 the contacts. George: and 9M2KN. I am abIt to wonc II moOes and bands e~cept S8teliles and 16l)n . organized by the Malaysian MotOl' Sports Club (MMSC). The 1ounder5 are VaI&ry RA9YD and Yuri UA9YE. the award will be issued to encouragecommunications witll dinarent national areas wilhin the Union of Soviet Socialist RePl. UMV. Stations soon 10 be on the air are 91ol6MX. tiring job. The certificates are av.. Isn't the m.. 9M6NA. wllich in· cludes Stbah llfId Sarewak. SCA-lroptry. USSR Early in 1989 a new fadio club. UI.._ also on !tIeawdumg the _ period. 9M6HS. one-semester flam course. and includel slatemen1 by twolic:&nsed amateurs ttwlt the nec:nsary cards IIaYe been cIlecked. Itt the notNlam ""'*1.51 asOs on eaell of ellllar three HF bands. AI 0Sl. Barnaul 656057. Allons. attracts I pilHIp. TG.. QnIy contacts macMl on or altflf Januery " 1990 are . VO. UAIW. Thtonly Sltelile S1ation belollQfld to 9M6KT. USSR. As I was not: able to anend !tie convention. UA6J. romments on pi/9-up$ Ind ttle pu'f:JO" cI amat' ur rfdio. VU2. HA. National districts: UA1P.A5 . 9Iol6UA.. ¥N WIfIt to het1 me? TI'Us bnngs up . GONAilIaqve. UR.wnJ IftJ'ekS ago . S4JbfeCt / drscr. UA6P. Box 13329 88837 Kota K1NbahJ Sabah Malot)$i8 !. n appears that lhe !lam shltcIc IlIId ~ IJiwe paSS«J into obIMott. belt I've beet! rtJIIIIcing Ilbouf t1)'WIg 10 do JOIfIBlhtfIg myself.. contact depends on the propagation cond~ions . MARTS reponed recently tllal there are 309 licensed amateurs in Malays ia.. XE. UAIB. 01 course).4 prlla. UA9K.. MIke. N. The cost of a plaque or trophy is 50 lACs.220 at 23lXI UTC. ing from two iSlandS.. Alter receiving the basiC award . tot the IOTA award . it aspecdied requirement is I'lOl indicated in the rules . UA4U. It\aflks 10 Festus ~ 9M8FH.. UA6Y. but hit was {)I'IJtWJIy right. tot Ihe ttIird year running." was YfIfy ~.. SIeve.fItIr pat/(ing my au III lI'OrlI. 9M61Q.UF. VU. and 9M6HF lIfa lhe only stations w~h tritlander yagiS. how do you acllieve \hia by e~· changing call. 91ol61.O. Tan. ioslead ollrfing to break their aoo f8C0fd.()egree l ine. " Ninely. Ami6Jo1lnscn NIBAC IOJ Old Homest. Tmfflting a/:loul one evening a week ? Thard be al leasl 14 meetings. In 9M2.SWLs. LOCII GrowfII..UO. / WIlS pleasantly surpris«i . 9M6JA. plicants who Ilave lbeen able] to prove conlaets WIlli each current ACOXA member. cat. and • young man st. please /lOte 9M6HF'. LA.ysia w~h \he call 9M8ZRI2..in aim of amaleur fadio to strengtllen International goodwill and Ifiend$/lip? So. VE. 111«110 /JdmIt /1I8t I !I8dI'l '11hought 01 if /hal way.000.100 meters). UAIK. and moet of us here prefer I niee ch8t lind gelling lo know tile opetalOf II the other end. Dave) was ective in Nowmbef. OX ActMties. Ross. Soviet Citoes A. only the necesaary additional con tirmations are required lor a higller clasa or endorsement. JT. SP. any mode •• . VA. 9M2DW. UAIH. The amateur llIdiO COf'IlfTlUo nity is growing. Sate (JE1JKll and 9M6OO. ASNA-4rOf)hy.d out and IlSkecJ me if / was a /lam. UC.AnwNIBAC smc. ELECTRONICS --. only $89 SEE THE SPACE SHUTTLE VIDEO Many ATV repeaters and individuals are retransmitting Space Shuttle Video & Audio from the ir TVRO's tuned to Satc:cm F2-R transponder 13. has put together what he calls the •'tccee-Talkie.. a 1 wan ATV transmiller.. 2522 S .. no messy cabl es and adaplors 10 WO«'/ about! Build you.and you will after see ing your first picture . P. LtC. Photo D.. own " l ooltle " Use a Radio Shack Pocketvision 22 (the 23 a M 24 mocIets will work aswetl. gel cell and a 440 MHz rubber duck antenna. all you need is one of our TVC4G ATV 420-450 MHz downconveters. / (816) 447·4565 m-' 8arn06:30pm pst. The " Loolcie. Photo A. It enables you to sen d back video from your camcorder. C ontinued on page .C. and you have an e xtrem ely portable ATV statio n . " Photo B.Talkie. a miniature B!W TV camera.Talkie" and heads lor tile ooor . ATV repeaters are springing up all over . With lhe adclilion ol a Ham lroniCS VefY seneufve receive station.• B.-_. 76 73 Amateur Radio toosv » February . KSBJ A TV repeater site on top of Shaw Blifte overlooking greefer Phoenix. preamp.25 MHz." Brown WB8ELK 'if> 73 Magazine Forest RlJad Hancoclc NH 03449 The "Lookie-Talkie" W ith t he current t re n d toward s m iniature video componen ts. Earl Campbell KS8J 01 Glendale.e transmitter and the battery. Paxaon Ln Arcadia CA 91007 Photo C. ~ . The " Lookie" compared wifh a Yaesu2 meter HT. Others may be retransmitting weather radar during significant storms.check page 4 11 in the 90-91 ARRL Repeater Directory. you will have a Ham Television receiver. VC R or TV camera.I Take a small pocket portable TV set. add any TV set to ch 3 and 70 CM antenna. . If it is be ing done in your area on 70 CM. ..show your shack with the TX70-1 A companion ATV transmitter fo r o nly $279. coo T~ (W60RG) Mlrylnn (WB6YSS) Contact Advertisers Easily Use your Reader Service Card 78 . .': (See PholOA . Once you get bitten by the ATV bug . This series of pocket LCD TVs tune directly through the 70cm ATV band and evilfl luoe below 42 1.ie ". Main osn of the case con/a ins the Kreepie· Peep. Interna l view o f the " Loo /<. RelTlOYe the back of the TV set 10 COO5efVe room and mount it through a hole in the lid at • plastiC pro. Roger KD7HH end Wayne N7MAO can be seen installing the new antennas.'. Note thaI the TVcamera and Ihe back 01 TV receive' have their cases removed. 1991 Vin. Arizona. it was in· evitable that someone would come up Number 27 on yourFftdbKk card bul are somewhat larger) for lhe ATV pream p kit (LNW-400). 33 & 23 CM ATV catalog.ect box WIth the video equivaler'll of an HT. then mount it all in a plastic project 00. Call for a copy of our c:cmplete 70. Now w hen Ea rl wa nts 10 go portable or mobile ATV Ile just grabs the " l ookie. -!==t--il1' 1 400 I r e • "' " '" OJ __.IOO i s a similar siz ed eamera and could be used as well.17 repeater ( -600) or 145.02 03 AL-1A AL-2A Misc 2'£'=" )l]MIT Ftgure3. 8S well as to supply power to lurn the ATV transmittar on and oN.2 Ah gel cell battery.. 15272 S. They can also be found on the 147. Fii1dlay OH 45840. ASI275-243 5 volt relay. The repeater is vertically polarized with an input on 434 MHz A1. use a capacitor Ihat is 10 limes less than your final value.25 MHz. TmrerpartspUJcemen!.: ( _ ) t' -~:J--i-:l-~l Ten Minute lD Timer I ME G . Figure 1. Their local ATV repeater (KS6J1 r) is about 2100 feet above the city on top of Shaw BUlle.A. " . The 2 meter talk frequency is via the 145. Note 2: The Aromat ASD-SV relay is available for 52 + $1. if you 'd like 10 control more than one device (see Ftgures 2 & 3). not the CMOS version) timer charge and discharge paths are indepei1dently controllable via the 1 MEG control pots.0 aVl35V tantalum capaCitor 100 microf/16V tantalum or electtoytic capacitor 0 . Electronics KPA-S trans- mittar to the back of the project box to 10 00--0 00-0 TIMER ~ 73's FIglP8 2. (AS' 270-224 or 270-232) .50 shipping from ARE Surplus. Just above the TV rece ive r.7 MEG v. 1i11 Parts List (Ten Minute Timer) C3 C< o (92325 MHz alternate receive). since lhere is IonS of activity most any night! 1k ohm Y4 watt resistor 4.C2 10' IC2 0' 01 . " Earlcan walch the local ATV repeater with a P3 or better picture from over 20 m iles away. '" " 1 110 5 I/: 1 "~ '~ "' '" . You should use a high quality tantalum or low leakage eleetrolylic lor the liming capacitor. '" .. it up on several nights on board a research jet for some really wikl OX. mount the small BIW TV camera wilh ils ca se removed. He has taken jack and the OPOT antenna switch on the lop of the box nex t to the BNC antenna jack.) Connect a Hamtron ies just abovillhe 1.1 ' f-"". J NO oll t ll. If you are in the Phoenix area.r..) Shaw Butte is centrally located ai1d prOVideS coverage over a wide area 01 greater Phoenix.50 shippinglhai1dling per order. Aromat ASO-5V (note 2) 8-pin IC socket. 78 73AmateurRadio toasv » February.. No need 10 wait for the net. 4 7 MEG . Optional switches can be rT1(HJnted for external aud iO or video inpu ts as well. who" be the fi~ with a Dick Tracy style ATV wristwatch? Phoeni x ATV The AAA5 of Phoenix (Arizona Amateurs on A5) have Quite an ecuve group.. Button il up and you shoukl be ready for some real ponable ATV adion.. or use it to switch 12 voh power to another relay or device. Output is on 421 . " 10 0 Uf.1 prel8f the Aromat relay since il draW5 less current. This cifC\J il wi..A4 R3 A5 . PS Quality reception tIu beel't consistently seen over 40 miles away.. There are sp aces lor two d iHerent k incls of relays on the board (only one ralay is oecessary).. It's beel't a reliable performer and fits in a small space. The DPOT switch on the top 01 the preamp between the TV sat's antenna box is used to switch the antenna jack from transmit to receive.) Mount a e. watt resistor 1 MEG potentiometer 1.. Minnesola and Great Britain! Now that the video HT is a reality.or Video IN " \L f. Dundee IL 60118 lor $4 + $1 . " 1 I'1£ G 211 .o .28 ( +800) repeate r during net nights as well. (The GBC CeO.. That way you can make your adjust· ments without having to wail a full 10 minutes! Then just replace the small capacitor with the final value . Ten minute "ffl6f" schem8tiC. 1o‫ס‬ii for their weekly A TV net every Wednesday night at 7:30 p .. try varying the values ofC3 and R4.17 MHt simplex. ho. During this lIight he used the " Look ie Tatkie"to make aeronauti· cal ATV contacts in Arizona.1 microf disc ceramic capaCitOr 7805 SV regulator 555 timer IC 2N3904 NPN transistor lN914diOde 1N4001 diode 5 volt relay.ool<ie. Most stations in the area need only 1 watt 10 access the repeater. (S e e Photo C. drive both relays.. .c.A6 C l.J:. c. Th is partiCular model was the '. .. 12 East . SO amplifiers are used only lor dislatll simplex contacts or lor m0bile use. ho"eV9f. 18N640 Field Court... You can use it 10 automatically switch in another source of video via the o nboard relay (comput· er or identifier). II you can't achieve the desired delay interval with the ad justment pol R6.000 feet.m.. Phone: (419) 422-1558. Timer PC foil panern. . Walk ing around Phoen ix w ith the " l.. 1991 0 This lime eecon (Figure 1) solves the problem of identifying your ATV system every tomrnutes.R2. To set up the on! 011 ratio initially. " '~ . I've used this same circuit in my live camera balloon nights to kick in the video 10 board lor 30 seconos every two or three minutes (using a 22 or 33 ~ capacitor tor C3)." O---ON C all lll ll! (~ . The 555 (use the standard 555.. (See Photo D. I usuallyset it up to 10 lor 5 seconds every 10 minutes.lItchell Industries M ICt~Video camera . PC board (note 1) Note 1: A blank PC board is avaitable from FAA Circuits. His most recent night took him from Ariz~ na to Italy on a Cessna Citation jet et 42. . .." I32'OJ · T" 'P M·._ AOSS DlS T'-yTlIOG cOW' . _. MAo 01834 2 meters 220 440 - CIRCLE 144 Of'l READER SERVICE CARD ..:lI SeacIard HI...-" . Voice 8 AM..5Io:O . That's why Mark 4 is t he performance leader at am ateur and co m merci al repeater sites around t he world ... Zenith.1PM: (718)466-2 720." .. and frequ ency error • 4c han nel recei ver voting • cloc k time announcements and fun ctio n control ... beg inne r.. _ SPY ON THE EARTH IIEHW OO O T5-UO$WlT UNOER $2000 . . • __ '-.---. _ _ ..50 . -~~ ~ ..15 5 1 . _.....!.. " TECtoNO.. RO .... Groveland.. Two METER SPECIAL _ ... OlSCOutITS I~:"- su SAi.. Eagan MN 55 122 CIIlCU : 21 ON RUOU SERVICE CARD CEu"" D:42-50 101M. _ .~. 5O W2II. -- ~.V. or_ ._.. ''''V" " ..lOS $52990 '_"'II"" ~.h CIRCLE 42 ON READU S ERVICE CARD CABLE T.. 8 bits.rTodI V ' f rom GENE.s'.. ' U ll..40 Wlft.."MIIl 1CCe$ ' DY (1llUP S' 25-=:11 GICtzollIry I: 1. "". _-.O. Call o r write tor specificati o ns on the repeater..15 unu..W.INC. Only Mark 4 gives you Messag e Mas ter nol real speech • voice read out of received signal strength . O M5.. .. .. _ -_ ..'" _ _.- e-......-.."~ ".-_' _ ....Io'yGtoup $125.-.(lf1SO GEtI"" n...15 5 15 ..lDV $'0010 ~ ~.- _ _ _ ' . extensive phon e patch f unctions. 1oIor\larII5910:2 _ • . _ .... .. _$ I . . _ ---_.. 300-2400 modem.. -_. ..I'U ..... scenntc aueonc. . NOVICE 5 11. NY .. . 'e- .. club news bulletins..... __...- csateec RINDS n. Speak any phrases or words in any languages or dialect and your own voice is stored instantly in solid-state memory.t..:J-:. DJJI!i!f l!nI CWr.$ 3.. _ ... ~ ~ B& B INC._ . _ CIRCLE 79 ON RUDER SERVICE CARO .D. _. .. 1 stop. .. Mark 4 even includes power supply and a handsom e cabinet. and Japanese envi ronmental satellites see._ . $1 25ea:.I THf CA.. 138-1551146-174 S!JJ..._ .. _-. -. .r-:.-..."- • ....!. Ov er 1000 sell In u se l Fo.."..ION TIf S GQ()[)IE FROI. 8 freQ 13l-1 50 I. I"" lOiJIoo: 138_1 44 \1M.. WI!h 2 F CtRCl E 3 8 ON RU DER SEAYlCE c. On•• IbftIa. & man. BILAl COMPAN Y 131 M ~ nc: n"... For complete details dial our electronic bulletin board anytime. Learn data acquisition and computer imaging.. deviati on .. _ ......!1034 . S99ead1 QUICK.. 7· helical filter rece iver.. BO X 16&4 & HATTIESBURG ."' ALi NC O OlU 70T o .. " New" MTS stereo add-on : mute & volum e.. _ _ ~ ..'-.~ '~' "00-' " .. Make money selling acquired data...38·155 MHI....~H. We manufacture and sell all the equipment you need... .. .. "IIlh ala::cesDJeS 4 ~2 FSc. .. Ideal for 400 & 4 50 owners .. _ Van uard Labs.. ~ 113Ctn!rII A_ !lIIongs.lS "CASf< CAR~-.. .> Scan Accessorlll$. Oak. 1-800-826-7623 See on your computer screen what 6 US.. and the ultimate in a real speech user mailbox ... CONVERTERS Jerroie". ...' _.F. .. .. WOLfE COMMUNICAnONS.. ..-_ . Makes terrific science project.. cont roller. Phone: 1(508) 372-3442 FAX : 1(508) 373-7304 MICRO CONTROL SPECIALTIES Division of Kendecom Inc . CU.... . Colorldo&031 6 (719) 637. Ki<ln: 45 wa!! ." _s.2 0' 6 FreQ 25 I02Il.:.. ".. and OX alerts. 5'0 ..... _.Oll _ SUO..... [):jl't!!!lUII!! O!l!y S65ead1.... ot hers.only with a Mark 4. _""'CEO so--. _ ' -... ... . = .' -. "". Create messages just by talking .ta.$ 2 .. Unli ke o thers.... no parity: (718) 740-3911 . 50 O m . 11445 ' . Russian. F lori5u nl . coo ~_ .. N S. EASY.. --"'-..~­ ' ... _- VIS S T U D Y P . .n1 S!<II'f'[O BY lIPS C.. S70 each.. -_ -. 40 30 aeac-o-aoe Drive . and rece iver w inn er s...._ .. . Create unique 10 and tail messages.-~"c'l· . ~~ . 570 each.. XVLI" kld5. 23 Elm Park.IIf05 undtl1lntd ..... THIS I. -. MS 39402 Of! I CIRCLE 104 ON RU DER SERVICE CARD • FAX • FAX • FAX (406) 252-9617 * * TELEPHON E * TELEPHONE * (406) 252-9220 CIRCLE 2 0 ON READER SERVICE CARD The only repeaters and controllers with REAL SPEECH! No other repeaters or co nt ro lle rs match Mark 4 in c apabili ty and features.--. . . & COMPACT CAlL OIl WIU1t I'0Il CIJUDI'l" FI..I_". In business since 1956..lO CIRCLE 2 5 4 0fr0I RUDER SERVICE CARD CIRCLE 131 ON READER SERVICE CARD HI·PERFORMANCE DIPOLES .h urds ' NOVICE thru EXTRA ' t~ry.. . . . lllawer VOl! Only ... Perfect for emergency warnings... Hollis... 280TIffany Ave.... Butternut.ng .1NOIC"'TOR ' 6 TO 80 FT.. ARRL PubliCalions... ID-2B-LP Low Power $109 . All InputJoutput lines Ind component d. . HAMTRONICS .. or 46 'lV PP M. Sal.~ Uf~ 1111'<"" «' . ""'_I. Manhattan Manha" an'.DEALER DIRECTO. Hustler.000 ham reletell gear in SfOCk.. Open 7 Oays M-F. fl .P.95 CiLB B. Mod ular design . C. Na". l. {2141 961-1936.AnLE I. HUSTLER. lISA P_0_80~J.n 2 % rH O • Completely Wi'ed end Till ed NOT I Kil Th.1.rd.HJtru.. ICOM. Message select ion via binary inputTIL levels . and much more . CUSHCRAFT.... 10-5 p. OEM . .. KANTRON· ICS. and alull tina 01 eccessoees.Low noise-high overload resistance . Can us for " all" yourham neectslOday. etc.. VIBROPLEX.Pelham.m. New York NY 10012.. BNC. UNIVERSAL RADIO ..TIONS The 50-230 Smartuner is available from : 81)"""". 1991 79 .Februa ry .slgnltlonsafe clell1y silk screened on lh.. 50 mil PUR • [).idecl with lull documentalion. ~ . Amateur/CommerclalfEducatlonal App lications: • Repeille...". . amateur publications. by appointment. Code • Sogn.E. P.5m. 2Ct>.. $555. MFJ.8 db gain-ulilmate rejectioo ) 80 db .'JIttNQ.. and Butternut.m. YAESU. A1inco. C4 f l4-M9·!i()(() 5tq*sSJh lof 4<lJ-J#-4f !iO ". AVIATIO N... Heil Sound ..OLLED ' 1. VHF COMMUNICA TlONS.8 TO 30 MHZ RANGE 'NON -VOl. B&W. ~ .amptin ll Rite for "'illur.Jamestown NY 14701 . ID AHO Prealon Ross WB7BYZ has the largest stock 01 amateur gear in tI'Ie intermountain West and the best prices..IIEMORY ' IOTO ISO WA'ITS INPUT POWllt 'WATERPR ooF ' 10MS IUTUNINGTIME 'D ... TEN-TEe . Facolry aulhorized Kenwood Service Center.. (208) 152-0&30. HElL. It.GaAs lei optson (above 200 Mhz) . I>alf·mlillon dlfl<o<...ony kngIh antrnnlll ( S Ie> 80 R) In 'hor HI" b...T .-\..'5 u _ • Selectilb le Conlin uous Loo p on Record Seconch Pit DRAM • M. only 2'1. h igl> ...9~5"". KLM. ·-dtr ...k ..u p 10 a EPROM programmed messages .I. lOOM. (302 ) 328- n28.. (7115)1164-6345 .re provid· ed on the PC board for lftOunllng con.. IOIRd Me ssag Ing • S<mpleI Re peal ar • Voice MilllDoI • COft leS let/OXER Voice MeuiIll. Circle Reader $el'viCe number 129 10' more information. NY 14224 716-675·8740 9 to 4 CIRCLE 11 ON READER S ERVICE CARD 73 Amateur Radio Today .L ~ M.ton ID 83263 ../J." 1ons in a •.. In Dallas since 1960..s l LoggIng Programs or BUSied Call Pllllyback Wo rks on ANY Aud IO Slgn ill • ' nsl l nt Repl ey Of Eme. . OR51 Mfg...II s ssage s • Hom e S"l: uri ly • Till k..lI.s ee : 2.. In !<'sa ' ha n 10 "'" . DE 19720. Inl erliIC e willi Populilr COftt. & Sun. g...ttd Production Feclllties Av. Order 1-800-426-2820.1%-63 10 CoReLE 188 ON READER SlAVICE CAAO The Radiokil DVR·60 Digital Voice Recorder Slate of fh e art . 20.tl. SPECIAL HAMPRlCE..rou... """ . AEA.. (212) 92S-1OOO...tJ8OOIJ Tdn..n.c as t aluminum enclosure .. J 28834 Fu.. """" Broadway . ha ..h""""'tl...W -51J<:!/OJ ~ ~R.l4 5GC boeo.. ROSS DISTR1BunNG CO. e.Y coupOrf intr1llwn'ly .I ON READER SERVICE URD . too..hor If. (215) 357-1400. C!tJ/J. 18. Over 9 .m.. NEW YORK Jamestown Western New Ven's finest amaleor radio dea ler fealur.m.... Buff. • PRICE $149. ICOM. Inl~ Tech. PENNSYLVANIA Trevose AUlhorized lactory sales and service.b/e RADIO KIT .. Japan Radio.... Dallal TX 75201 ..o. Full stock of radiOs and eccessores. to 5:30 p.urface mounf technology provide. 10 Noo. . Yaesu..' way:< 1O~n..... Reynoldsburg (Columbus) OH 43068.nd 0.. AEA.~ ~ a l . l "" l nduc' ark:~ co m N n.. AEA.-s.5 large helical resonators . intermod . aJ/J~lJ HrwyIllldiD. AEA. and 50239 connector options ± 600 Khz @ 145 Mh Z: 26db ± 1.n opn .I NTEL LIGENT.Imbus Central Ohio's IuIl-1ine aulhorized dealer 101" Kenwood . "'n<!.. DVR-60 Is pro...N . ICOM..W A . O.&?t). Kantronics.7 x 2_6 x 0 _7 " NEW Model 10-2B The 10-2B provides required station identll icatiOn without trcu taesome diOde programming _The " 10 over voice inhibit"' ci rcuitry allows l or courteous operalioo by not allowing an 10 until the next squelch closing. 1280 Aida Drive.mot wi ll ...... U. 512 OHIO Cok."u.52b... and desense problems in repeater systems. featuring AMER1TRON. ELECTRONIC CanER."1 0 over voice inhibit" • Low power option .""I« . unequaled price' perlormance benellfs In a unlf that measure. 'MICROPROCfSSOR CO""".110fI 1Qft Le n TI'I/.. Sat.. INC • • 4033 9r'Ownsville Road. KENWOOD. CW &I. Circle Reader SeNiCe 379101" more information.iUnc~ cornl>tn.. • 32I\SPS s.Very high rs jection .. Kenwood. Yaesu.ng ICOM-Larsen-AEAHarnl1Ol'liCS-Astron. Sale. AM.in.. 5GC _'-'-.. ~ w"h aooy Ill" or.. $lore..00 ~w ..-rivoot" Ita · s pKlI\ca 'Ions _11><. bpilndable to . New and used gear.... Circle Reader Service 74 lor more intormalion.II e u a ges • 60 Sec onds Reco rdinglp lilyb ec k Aveileble a$ Sh ipped . ..Hb~ Td oZOb...EC I KONI\. iiiiiiiiiiiliJ it S G -230 SMARTUNER HF A NTENNA C O U P L E R -SSB . Amentron. Cushcrafl. 71 S.ol1<>oD pi. ICOM. Box 973·C . BIRD.. Soundrng AudIO • Selectllble InP\lI Gillin Lw el l . Large SWL dapar1menl. ng Sign • Public Add re ss System_Emerge ncy Ann oun cements -40 to 1000 M hz tuned to your frequency . Req uire. SONY. HYGAlN.. .. Four holes ..Y . TEX AS 0111.. Cushcraft.1~ VOC.. FAX (212) 92S-7001_ DELAWARE Factofy authorized deale!'! Yaesu . FAX (215) 35S-8958.. .. Rohn. ~ •• n<".. KENWOOD. ... DELA· WARE AMATEUR SUPPLY. NH 03076 (603) 635·2235 CIRCLE:. N um. 151 Commerce Pkwy.95 Typical rejectkN1. • Mel " SeleCt -Up to .1dID. s wl "..Y_·.lo..... ftUllIn R in . Minutes • Men ilOl Bufters Com plete ly Sot! S"l: IO'ed • Rilnoom Access PlilybilCk t MiI1l • 1 O.. INC.ond This uni' w. y a"ot . HAM AND PARA-MJUTARY A PPUC. 71 Meadow Road .ACCU RATE OPERATF:S WITH A N Y HFTRANSCEIVER _Il 'un<'S 11><. Inqulrtes We/come Custom Of/slgn. YAESU. and Sun.·.O. bo. 'eh r<l<.)JNC. (614) 866-4267. largest and only bam and business Radio Store. AEA.. 2809 Ross Ave.. orComP\lte r COfttrolilbl. Repair lab on premises.. ANTENNA (AU TYPES) ' FOR MAJUNE. Rlllt iO ~dS • Pow.. Heath Amaleuf Radio. State.gency or T'1II111C I.II<' (""i''''.Adjuslable audio. New and used equipment on display and operational in our 4000 sq.. speed & interv al timer . We ship worldwide_BARRY EUCTRQNICS.. m...-s .enienc:e. "'1Ie~..... CALLBOOK... " 3'" Inches. Trevose PA 19047. Featuri ng MOTOROLA. ID-2B WiredfTested $99.. We feature Kenwood. b4 in put _ 3 l ""' put c. 8 ' .. II """"m b<>. T_Tec...6 Mhz @ 22O Mhz: 4Odb (44db G aAs) ± 5 Mhz @45OMhz:5Odb (6OdbGaAs) ± 20 Mhz@ 800 Mhz: 65db ± 20 Mhz @ 950 Mhz: 7Odb •"""sed Speclflcltions: • UP 10 16 Vlr+able Lenglh l. ~~IW'r... HIGH PERFORMANCE PRESELECTOR-PREAMP The solution 10 most interference.11717 s... "" tuninG ~al''''' .. HyGsin. tf~ 4 ""1Ky. you transmit on . LineI 8. D A T A F AST. 9-6 p..... II . . but the problem was not easily diagnosed from the ground. also known as UoSAT· OSCAR-9. the staN at Surrey managed to command 1J-O-9 10 the 300 baud ASCII downlink mode.ft. (NSFYMphoIo) teem in England designed. fabricated . but still keep the emphasis on making the system ootpllt uselullor educators at alt grade levels. IJ-O-l1 is still in orbit and lunc1ionIng. or through the digilal speech synltlesizer system detailing the status 01 onboard sensors and experiments. instrumentalion ... Dr. The 1J-O-1 1 misSiOn was to fly a proof-<lI'Q:mcepl digital storeand-forward communications ellperlmenl prior to a dedicated packet satellite spacecraft.. he and a small group of researchers in Surrey built not only satellite subsystem s . The University of Surrey was otlicially Informed of an opportunity in Septembor 1983 for a ride to space in March 1964. experiments . 1981 . as well as lor amateur radio operators.. Iow-eosl spacecraft. Harolcl Price NK6K spent much 01 that lime in Surrey living in Spartan conditions woriting with the Surrey team. Experiments inclUded a magne· tometar. 1J-O-9 sent telemetry either digitally via RnY. For the first days of its lile.. The 350 mW 2 meter beacon can be heard successfully on most portable and mobile rigs. Until its fiery end in the atrnosP/1efe on October 13. eemeo r c ircuill and Iransminers. and several modes for the telemetry downlink. 1981 . Otfefed a launch oppor1unity by the United Stales. a chargecoupled device (CCD) camera.. but a whole satellite 'll'ilh its own power systems. a space-dus t detector.. was launched by NASA on October 4. and the Digi tal Communications Experiment (DeE). Marlr AIItHY G7DSY at the UOSAT control stafiOn af the UnMHsity 01 5cJrnty. After 10weeks of intensive effort in England and at the Stanford Research Institute in California.Q.. 1989. which woutd become UoSAT·2 or UoSAT. 1J-O-9 sent only an unmodulated earner. Photo A. It is usually configured lor 1200 baud telemetry on 145. 1991 .. U..11 was once again responding to commands and transmitti ng telemetry on 2 meters. l od ay ' s school children are tomorrow's university students.. and an array of shortwave propagation beacons . and to use a launch opportunity made available by NASA.oSCAR·11 after launch. etfy in a lao at SWTVY. 1984. Thi$ " fit<heck" model of u-D-11 (launched 7)'88fS ago) sits quf.lrom the Vancl&nberg Air Force Base in California with the Solar Mesopheric Explorer ...11 also has a particle-wave experiment.825 MHz FM .. 1990. tectll'lOloglieat. assembled. Martin Sweeting G3YJO reeogn iled an opportun ity 10 expand the involvement 01 the University 01 Surrey 10 build small. Main University of 5cJrrsy satellite tflJdling antennss on• modified antiaircraft fllJfI mounl. tober 9.Q. The launch vehicle was a Delta rocket .9. radiation counlers. An old Bell 202-type modem with a simple modification to invert bit sense { "1 " to " 0" end " 0" to "t ") can provide the listener with plenty of telemetry to decode. The experiments were to be complex enough to stretch the abilities of uniV$fsity students. A logic gete had failed only hours after deployment. Unlil19791he University 01 Surrey in England was no excepl ion. The ride to orbit with LANDSAT·S was unevent· ful.. UoSAT--3 and-4 On January 22. U... As Martin poin t ad out . (NSFVM photo) 80 73AmateurRadio roaes » UoSAT-2 With only six months available. • CCO camera. industrial and commerCial sectors. The Satellite Programs Mos1 universities do not bu ild their own spaeeeT8. CW or ASCII. Photo C.. Brit ish university involvement prior (0 1979 concentrated on the development 01 sensor aySiems . Uke U Q. and were ready lor another Calilornia launch from Vandenberg Air Force Base on March 1. integrated and tested UoSAT-2.. and detectors for experiments OIl board satellites bYilt by ind ustry. bot only a day later the satellite would not respond to commands sent from the control station . the Photo B. The goal was to creete • satellite that could be monilored uSing simple systems on ham radiO frequencies . The LAN DSAT-4 Earth resources satellite needed to be replaced.. end eventually our luture spececrert engineers.-1 Number 29 on your Feedb. the University of Surray added two more satellites to its continuing list of accomplishments . Finally on Qc. (N5FVM photo) February. The success of the UoSAT-1 program encouraged G3YJO and others to cont inue with small satellites and to develop UoSAT-B.Q.l 1 has a speech synthesizer... U. The mission proved the viability 01 a universityinspired satellite program and generated interest !rom academic...aek u rd HAMSATS Ama teur Radio Via Satellite Andy MacAllister WA5ZIB UoSAT-1 14714 KnighlswByDriVf1 Houston TX 77083 UoSAT-1. 0range villC' . . Seleclable DTMF mule on repe.-w KUI29 $250 SltfI2IOK 1:zM..l IOOltW Kj Sl311 llooI$2<IIl Stlf 2JlMK 2304-23OIlIIKz ''''W Kj SI95 &A:SJ20 Sltf 2. . . W3HOT ~ Bo1l 2310.. _ _.$25 Shi pping per order $3 . 8..odorl U/'IOt • Ul. p i L 0 PC bOItdJ. lesled.. 1296. ..1l6 _ S..~ . .. _ l'I: __ _ _ _ _ _ _ = •• _YOU-. B(l ~ 66 .m-oe ...... DOtl -. ..- _ _ 0" .. .. . P... THE CHOta OF THOUSANDS OF HAMS It PROSPECTIVE HAMS....tailed applica lion manual l o w POWII' operation. .J45&... .O.NTEED . ....2!>' or $21.-" Si. 1hn. !\. PO Bo. iIiary e M conlrol .. NY 10901 F.. A.. CTION GUI>.~ •. RELAY OProN D. L. or Pad<e1 RadIO •TIlo& WI Be lI'lt Us! C64 I'oooe< ~ YCIll WI E. 1 ' .." ""' _ . og ..'10_ 100 _ -e.. A. .. _' • _ _.-.. . DOWN EAST MICROWAVE Bill Olson. 2~ . -" or F .__ _ . ..95 10 Sheets only $5....O.£ 19 3 ON READER SERVICE C. . T._.ns verte• SHf SYSTEMS Noh.0'-- _Nl.. Sheers for $3.ll I oil t14-35 7~43 _WlIo<l"'OIoot< CIRCLE 392 ON READER SERVICE: C"'RD SHF 1240 Complete T..d _ I -. 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J Chestnut 51..bIttd.. .W lU S 601 CALLORWRlTE FQRCOUPlETE C. . 1inII. • CompIeteI. " •• - c.lptove(l • 4.. 282·5628 BRAINSTORM ENGINEERING ( l " I 24 9.. • ... Bo..o Aeptorabl& • Don NIIl Run HoI • E _ F_ • Plugs Oorectty lIIIO My C60l ~ Comro. .. jO " •_ _ • .00 CREATIVE CONTROL PRODUCTS 3 18S IlunIing A_ _ Grllnd J~ CO 1 15M 1:J03} 0. udio Re-pealer. we rrenty Link monllot·mi.10... . _ ''''"' .11l'38V Kill ~ "".. toMOli lIIKz so....«l~ wo i6ClU S "" compocllooo proNIlloIsn. _ ...00 $89. 1990 CALL DIRECTORY (On Mic ro fiche) Call Directory Name Index Geographic Index Alllhree .AR1 Troy..73ANDWORLD RADtOI L£ARN IN ..udio inputs Minerai.o 3'105. .. < (SR>Js.....ler e nd ~nk . JUST 3 EASY STEPS: • Copy circuit pattern on TEC·200 film using any plain paper copie r • Iron film o n to copper dad board • Peel off film and etch PA 17859 7 17-458-6243 c::onv~ni~nt 8 ~ x II sue WIth Comp let~ Instruct ions 1-800-457-0705 SII TlSFI>.. ""... RI>....o QST or 73 or _ $19 ....3 AMP UM Used For "'ld{)n•.... .... . . liiog or ....'•• .. $ 10 10 10 BUCKMASTER PUBLISHING • REMOTE FUNCTK>NS • AUX. ~O I'£A TURES OF THIS UNIQUE PACKAGE tIIClUO£: . .go...IlPlr COllS U5 ~..... _ ..epee ler /llnk /DTMF . .RVICt CARD ClR'Cll 14f.. . one yea..UAI-IO AND UAI-20 UNIVERSAL REPEATER/LINK AUDIO INTERFACE SIMPLEX REPEATER ..95 Call for best prices! ~ 5/ .:l4MllIIKz IOMW Kj Sl95 &A:SJ20 StIf lOll 50'0-5IIl11Kz L....... " ..S ' " $2S" HlCA_ ' _ _ _ Taxj lo ' GGTE._ .._.. . .. ' • NO OUPLEXER NEEDED • VOiC E MAIL • VOIC E IDar • DTMF REMJ1E PROGRAMABlE $329. ' 4 __ _ "'''lI ' ._ _ ." '..ll ior eatalog TH E GRA PEVIN E GROUP..". OJ ' lP"l . Olher freqo...oI "'djustable .0-.. _.1l6 3 .poll.-.. IMPORTANT CATALOG ANNOUNCEMENT' eoo ... . "' ..~_"'""_ .. 8. ~ For PC-OOSIU5-00S ~ ... Ad. ""._ ..13OCIlIIKz lOOItW KjS I39 llooI~ Sltf I 2QK 1261·I212 O':' . /monilot mute conl..... ~ .... 49 7 Northport.£It\lllC£ CAIIO MICROWAVE TRANSVERTERS SCARED OF THE CODE? rr-s A SNAP WJnt GGTE 11<Y~::ol >11 'l MORSf TUTOR.5777 800. __ . Son e KjS I50 llooIS250 SltfM5R.-.. ..10. .-UPSI •sm. Murtiple DnvM... ud io outpul. ME 04987 IIIiiiiIII (207) 948-3741 - EJ M1l "li>l\"li> O"'"t g \\~(.Rt> .._ 0' _ . oil ' ....... .. 19m. Suffern... ....•_ ... N ....et I'un:IIaseo oOwI ~ 01 C6lF_ _ We<e Quo 10"""'" ~ l..TAlOO e..ency oplG'Ii " ... transputer data plocessing units. The digital " B" syslem includes three distinct uplink lrequenc:ies and a single downlink using standard FSK modulation al 1200 baud.. UoSAT· OSCAR-14 is performing well with 9600 baud Mode "J" (2 meters up and 70Cm down) . Centre Natio nal d·Etudes Spatiales (CNES). bu l Ihe chances of recovery are dwindling. the group must maintain operations on the current UoSA T$ . THIS \S I-I T THE II-I\lOICE FOR MY I-IEW M ICRO1-111-1\ HAI-IOHElD -. while a small hefilt provided the downlink on 7Ocm. As if there weran't enough to do.THI S IS M Y !-JEW M \CR O M1J.5 hours lor one revol ut ion around the Earth . Research Fellow Marll AJIery GroSy and others have been putt ing in tong hours to finish the project. Many of the eltperiments of U-o-15 afe being built again in the labs in England in preparation tor launch this ApfiI on an Ariana rocket. the satellite is nearty II cubic yard in YOiume. This conflQu- ration was chosen 10 allow standard packel-ready Earth stations access to AASENE.O-15 includ e a camera imaging device. A sc hedule of operati ng ti mes and modes will be determined by the STELA (Station de TElecornmande Arsena) ground station . 19 91 " t. Ellp9fiments on lJ. JI had only a lew radios in a very small area so it did the job. but other sys tems have been added. Efforts continue 10 determine why it has not been transm itting. Signals are loud and have been copied on incredibly simple syslems. but the projacl is still aliv e and may be launched in 1992 with the TElECOM·2B satell it e as the ma in payload. CW or any other analog mode. and at all education tevets. ~m. nearing schoots. UoSAT-F Undaunted by the probable loss of U-o-1 5. The salellite is to be iflCOl1)Ol ated into l he launch ring adapter between the main payload and the Ariana rocket. Febru ary. Eltperimenters at Surrey continue to pl ay a piOneering rol e in space education both in England and abroad... and an analog (wice.• Photo D. and UoSAT-4 (UoSAT· OSCAR-15) were launched with the microsats by an Ariane--4 launcher as secondary payloaOs with the French SPOT-2 im a gi ng satelhte. Current Mode "S" uS&r$ will need to make appropriate modifications to make the 44 MHz move. For the 2 meter uplink he used a turnstile . After launch the new satellite will get an '· OSCAR" number. An onboard radiation dosimeter elCperiment is also included. Many people have lorgotlen about this effort because of the delays and tack of informalion. and an apogee.. T he linear transponder with the 13cm downlink can be used with SSB. The ortJit is to be elliptical with a perigee. little has been heard from UoSAT. The CtJslom tracking gear and connections to th e u niversity' s mainlrame computer have given way 10 386 com puters and arrays of displays lor telemetry and tra ck in9. The anlannas are still in use today.-.. AASE NE was begun in the early 1980s and includes the Radio Amateur Club de ressece. The AASENE program has already contributed to the teactling ol space t9Chnology.J \ H A.space resource lor communications experiments· 1II 00 o The ARSENE Satellite Another satellite program dev'9Ioped for primarily educational purposes is the AASENE satellite project from France (Ariana RadiO amaleur Satellite pour l'ENseignement de I' Espace) . (N5FVM photo) tion 01how to accommodate secondary payloa ds with a mini mum of mass increase and inlerlace effort. so it should be easy to copy from nlOdestlyequipped stations. . but little else.0). This typeofortJit yields a period of about 17. or low point.oSCAR-15 since the day alter launch. ATTY.400 miles. After launch it wiN continue that mission but will also provide the amateur community with a . The power budget runs about 50 walts and the thermal control will be passive. The apog e e boos t rocket weighs 16 3 pounds and is made of carbon fiber m aterials. the Surrey team is worlling on its replacement. By t 978 the systern was elt· panded and was knovrm as a "teeconmancI center" with several radios and an impressive automated anlanna systern using a modified Bofors antiaircraft gun mount. Student contributors nurnber in !he hundreds and the program has provided 87 engineering pl o. Jell Ward GeJK8KA has successfu lly connected 10 the sate lli te BBS and transferred $8verallarge files using portable radios and small antennas.ects and one doclorallhesis. On several occasions. ol22. \-. ol 12. but for now it is simply UoSA T -F. and support from more than 40 companies. 27 eogt. The ground station at the University Of Surrey was inslalled in 1975 to SlJpport control activi ties with AM SAT OSCAR-6. and advanced European-made solar cells . and ective attitude contrO! (alignment relative to the Earth and SlJn) will be controlled by nitrogen gas jets. or high point. It carries two transponders. Physically.) lJMil for mocIe " S" (7OCm up and 13cm -.. etc. Spi n stabilization will be around the "north/south" axis.to \-t E l O 2 . Additiona/ UoSA T antennas wi/h crossed yagis on 2 meters and opposing helix antennas for UoSAT-3. Only one mode ("S" or " B") wilt be active at any g iven time. Mo de ··S " on AMSAT OSCAR·13 transmits on 2401 MHz.. Unforlunate!y. Th e downlink t ra nsm itt er runs 20 walts. AASENE is to act as a demonstra- 82 73 Amateur Radio Today .430 miles. ARSENE wilt come down around 2445 MHz. also known as UoSATOSCAR-14. The satellite also has cosmil: particle and Iotal radiation dose detection devices along with the packe t radiO communicalions eltperimenl. with a Iaundl mass of 31 0 pounds. Expected life is "". one mode ' ·B " (7Ocm up and 2 meters down) digital system. universities and celeges. ... BUY-8ELL-TRADE · .r. lQ-6 Sat. : SASE To Aileen Scales KC9YA. Ch«.00 for ourcurrent catalog and wholesale sheet ~~ I~~ "M OJ..-'(J OJ ""lEI! l lQl Itm 2S-mS ft . Band "NEW· ALiNCO ' DR-lil 0T'DR-570T'DR-590T(NEW) LOW DISCOUNT PRICES . .. t ."". '._. GlHl Martin I ngllM<frlng. _ .... cowenen ana safe way to install and maintain I(OJf" teen Tt1l5 is a oaoe rower system mae you can tniOV rooav SPECIAL TOWER PACKACE : 50 ft .fa ramal ooeratf'lg POSItJ:ln. «Me .. Flea ma..... _ ~ ·.K)Y A SHOW BY " QUALITY" DEA LERS For Table.. < X I.._. """"""'"'" . earth scrE. oe'6'>90 ..' _l 121 n .. .J C .... . . . • 0 -00_11I _ • _2 ... " PPO .. rmsr tOOl kit .S6OT h io . II".. .'O.. ' 00 ~..l10T :n .... <lut¥ ' 1 . -·_< · ... 00-'0 Sl r_.....__ _ _ _c _ _ • •.. _ .O..._.. "to""" "." 21 Garfield si. _ ~ . ..' V f OOT 71) lOtOG OVERAll . . s.jlt n 7 ur. . A t t 3......ilies II Forum s · Many Naliona lly Advert i se d Com m e rci al Dealers ...'u. 816·882·1200 CIRCU: 12 ON READER SERVICIE CARD . eo' . turnbUCk les.satetv 100:: system operates-. _ " . '"' "". ~ N° . VI'lF-UHf .....info 203-666-6227 We carry most major brands. eI .on:l "'"" ""lEI! ' IQI Il<nl .... f t. _ .25 MHz EN..."OI S EUCu O ~ EnjOY!\lEVER< CLiMBINC/.... __ __. used gear........'m.. teen-c.t+ FAX..l' '-0.. I VHF "-e you • All Indoors • Free Park ing · Paved Lot s ..-. rated at 1S SQ._.....DJ·200T 'N EW ' OJ-SOOT T*.... '" " _ '" Only $39 ... QIOI so 'f> '" ft Wf"Cl OJ 1&.__. .. ' .h tr~ stncwes sreoece to arJV heil... ... ..e<j.. (716) 6 64-634 5 (8 00) 752 -881 3 tor orders only W ll¥ 11" .- _.... 121 5' ... ...95 . ' _ ... _ . _'0 _ _ _ ... ...n OOD 110·'0 '04' I •• n .ASSOCIATED RADIO 8012CONSER BOX 4327 OVERLAND PARK... T.... 3142 Ma rke l Place... . ~ " " be Pf: ~ . '..kel • Ove r 500 Tables Talk-in on the In imitable " Mighty (2. <_ . lad ies Acl h.... grouna rod ana clamp.L"'otaO OUT.....--. ...~ OHM . """ ""m . _ .... IN 4740 1.""_ . _ ... "'" ."" . ..twerarsng or 1OWerf'lg_ At laSt a ceeo......_... _ _ . BloominglOtl ... ..·u..'" v <on"""'. _ _ ..FULL LINE OF ACCESSO RIES LENTINI COMMUNICA TIONS .1 KW) 525" • 145.. ... _.. Newington. " . • TX . '" C. New York 14701 Weekends and evenings by appoin tment.. ... ...._ . . -"""""" .. pt_ ._.._ .. 9 :00 am • 5:30 pm weekdays COMMUNICATIONS 280 Tiftany Avenue Jamestown...... _. _'" _ ~ ~_ .-_ PPO G5RV ANTENNA ~(:::>. .n " " ... _.. · WE'LL BUY YOUR ~ _ . AT lOUR Df:AlE A IF NOT _()Al)f A DlAI CT New equipment pricing and orders 1·8Q0-666-0908 Out of State.. _ . • RX 130-173 995 l....w -........<1" '... ' 0 l ENGTH ' 02 PR. 812-339·4446 too sce'eo or tOO oc to dlffib? Never ClImb again wtn ee to.. HAZER kit. 10' mast. ' • Co>. . °Mobiln' DR·110T & 410 T. . ft .." ... 1991 Open at 8:00 A. • • ~... A11 brands newand reconditioned. 8antIs • ~torCap & Mars · G<N! V..._••. Boonville . KANSAS li6204 CALL 913·381·5900 ""-= - FAX 913-648-3020 'NE I'ERf'ECT ' ' ' ' 01 fOll .."Kl<-' F_ • CTCSSE~ 1luiI~ • FNl... EVERY DAY A HAMFEST SHORTY ALL·BANDER • .. PhillVStran gUYwires..__ _----.D.. 1Ia"." ._ __._ _ Only $29 . _ ..... -.. up eeceon Next pUT() tceeWIth le\elll q cots fl tese..~ . vovager toees are 15 WId 18 n:..ou D'' 'lli ..... .....m .""....... ~ "..ge heavy beams on HaZer tram and Wlttl cne reoo WInch to tOP Of roee. . 51914... _. ._. antenna load@ 100 MPI-l... Inc _ Dept...._ _ . .. PH. hinged base.M . PldlllCl Best ""'" ba"" .. .. 1()-4 ~ ~ l=:=:. M::u1t rotor aocI . . send $3.QA· 112T (NEW) DJ-l20ToOJ·l60T & 460T.. .. TUo/OEAS wIT. . .'Ol _ _ ()o'"-. IN ACAIN I I I I IICOMI ~ _."..--.. ~ _ .. _ . _ • • ~"_'''''' •.... high b V 18" face tower kit.. 00 _ _ · e -.. 2E . _... _ IlO-Q II iCC>o'e ""lEI! 2 1Q1 or. .. CT 06 111 _ t>al ' ' .......... MARCH 10. w..' GS"v.. *... Located on the Indiana Slate Fairgrounds Indianapolis."" .'\oV ercrors. '" BANDS 5').."".. ld QA. _ " ....tram system. BOX 322.U lol" · CTCSS E~ 6uiI .. MO 65255 816-882-2734 ffI. IIICW ......... llIO_ ·'''''" _ . »> YOUR TOWER SUNDAY. ..95 ••.. Tech questions....n u I .T _ _ ~ _ ~ . ...... •• »tIflKtlOn 9U¥ t8lI ~ _ ~ Oy'lln. concrete foot ing secrco.-JIooo6..z.. -....s WELCOME CIRCU 2 34 oPoIlllEAD£A SERVICE CAItO INDIANA HAMFEST VGE I VAN COf'IO(N ENGlH£(AIHG ()HOO ""~' '2'5. _ ._ _--'_.3j1:. " OOH G5AV_MB GSAv <-..O_. ..~ ~ r==l WE SHIP UPS Hours : Mon-Fri.lHz 4OG-S19995 MHz • 45 Wall • JIll..ver and eevato....'. Of "GIl' ". _ EXTRA RIG STATIONS· ESTATES ETC... ..._llIO_..'"v..... ... _ _ . _ _ _ _ •• _ • _. ..iMa'il'ji'ti. ... B 51K or 10' sececo Ie JJlI& Easy to nstall tlirIge case. c _ _ ot>op _ _.. --~"'"' tl ON\. 1> .95."'. .. Sun .... SSO each..050. CompcMt1M".m.ntraI. . W.. Contael TRIAC ARC... WIBD mey be "fIlIOfliced OIl lach dinerenl band !of bonus point. Ort 8"' · ~ 11· SASE 10 SA RCWB7TJD. For mocal sa E~/yn Galu'rI' W4wrR. FEB 11 MAR3 MELVILLE . 14 count. Listings ara free o f charge 8S SpaC6 parmits.. "". No dUflliCIl" OIl repeller eonlllC1l . TX StaIion NSOWO . the Cincift. 2305 24th St.. For OSL..nt8f.1 4 .4148 15 1. Hallrom II AM-4 PM . 0lhII' NtionI IiIInd R$(T} and stall.. Auoc.• SM.. _. tovtllill WA I PDN. cw FEB 16-11 APACHE JUNCTION. . B....... .in 0<1 lhe WeBXR 146 . ' =KA5\1OT....ld OSL and SASE to Ron ~ N5OWO. V.C. 2P Forra . and . 14th end 15th trom25llO--OSOll UTC .. ~ by nurrbII' of VT oourtfiw pM ...281.. $UIlionI may be CORIac1ed lltIce HCh 0<1 ~ and CW (PDet and ATTY 00IlfIl • CW). '91 to D." t at thfl S I.»M at'IIIion c:on. NcMce 10 SSB portion . Killough WBofGY5. 20 . OOU. F..'... 15. 41 lrom8AM-3PM.. PO &:at 548. lind Novlce saclkln of 10 me t. ARC _ sponsor an Electronics HobbyleI Auct ion at Il'le rubooar Guan:l A1mDfy beginning II lOAM.. For inloe. Scxol U' *V't OSO points by 1TIUItipIef. (409}~II I.. .-en pIut . . SIt..:I eulhoitNd dub otIicOal or _ I. Talk.nI portion of eo.- .--vRlion only .ld OSL and SASE 10 KH6HU c/o KARC. 19IJ flU() .7151..... MYe" ce IicketI sa (by 211619 1). ~. 0Mti0n hon . V . 14. Ex..Tables $12.. 18 155. be held at Ihe RiChland COunty F ~. 2511I 81 ... A~tor1oPtIvN entnl!Is in eecl'1 cfMI. SenclalerVfl SASE or tutllelent lAC'. FEB' AUSTIN .. For IPfICIaI certillclltl and dub 0Sl card. lion Iorm. F~AK99. Wt>eelel'l a. For DealIw booIh mo contact RoWwl ~ N<lG VF. 14. c'O t. CHARLOTTE. Stt<\lPal' 1 AlIA .50.. SASE to< resuMs.. IlJ!IAnnuaI Sot~' 11 aliI. OR The SlIllm a nd Oregon Coast Emergency Rlpellt8f ..3 PM. . FEB 16 MARLBORO... Show end ARRL Soul..oliiWd 0Ihciel oIIfor8cIlO" amateurt .. CO tItJ239. Mail entnltt 10 School CI\ltI ~. menl 01' ArnatIt/Uf Radio In the Mew Yor1I City S<..t 9 AM. ll 10 highest-scorlng station in tIIoch . I»giio_.5. Not--C»-!.. KMlIhfJoKeu.lIioi. Fl eon. .• Ham Doings Around the World COATESVILU: . I (... park.17 LOVELAND.. bendI. linil a OSL con/innaIion IIld 9· ~ 12· SASE ao Y ARES.. Send $4. Advanc:e bCl<fItt $8 (dfIa<:IintI BURL INGTON .. . TX The Or. and Sun. Hl M Tl4 . I' . will be a banqu 1 7 PM .I141. OL AU.r annual LARC Swap 'n Shop Comput.am into: AI SrotIrtdtII N90K.. '" F~ Or.. 56 Ulhedoor. FL The Qnando AAC .... Oupe dlitclI . EoochailQiP C. Other Ital'ions: 1 poinI per phone comac!... will sponaor Ihllr 1991 H. 2111).. Canada. FCC £11:- 84 73 Amateur Radio Today · February..wsA T . tM tomb 01 George W.. pgIrI lot NdI phoneOSO. 2 points per CW or RTTY eontac1.1l MHz . SPECIAL EVENT 51AllONS FEBI . 3 ~ c.110. (303J 680 1851.... T. H. -. Hanck:ap pIrking. Admission $2.95 check pay.... I1F Packel. _. (5121 837-2003. Foran .- The 31" T ~ H..8aV.. PO SoK IT21. lor complettl .... VT OSO PARTY Th$i c. " 'lJ28I 91 .:I1PithIIlt a OSL cen:I OIl Ioq In10 oIa OSO . 8IooItIyn NY I 1217. Cl\MfOtItINC 28222-1 /36... & .iIlctdit lor any SWion 00I1laetKI..ler• . FEB 22-24 WAIMEA. ~ FEB 24 DEARBORN.. comrnunical'ion with tM inl>Imationaf. FEBn FE89-10 PHOENIX. mol . tHlOlnning. "l '. itemI purchased . .-.. (3031 450 6'910 or Jan KA7TYtI. PO ScM 3I:U. IS at !he dDot.. AZ The SuperstMIon ARC will operale S talion WBTTJ O In commemoralion 01 Lost OUlc hmlfl DIY' 'rom 1400Z-D200Z . . ~ate Statkln KAlVFF (ValtIntil\ofl$!of FriIndt) from 15ClO--tlSOO UTe Feb..OX COUI'Ilr*S plus 2ll . Freq_ oc:les: CW-l . or ARRL coum ry. (5 13) 85 1-1056 Aocomrnodatione: 0ualiIy '"" c. fl'lql... bur IIWII1l _ no f M iN...... Nooice portion 01 the 10 meter band..341 tend SASE 10 0Nn Wr_ K88MG. 3 F~: (PhonI) 80-15 .ovance. spantor Il'le Orlardo HemCation and ARRL SlatfI CorY.... Advance lockets $olI . ( -600) a nd 146 .C.l\CfI...4"'· S15 plus geo. or electronic tes1 equipment . 50 Libarty 51. Co •• . . ~ SIlow . The "W _ CarnIval Awan:l"' .pe. C ANADA Thl North Okanagan FIAC wIIopIItIle Station VE7NOFI llufinl. T_ poinls lot MctICW 050. t. • • 11' ce<lifil::ala commemor. 40. Vt/mlCln1: Cffl. ContacI Ju6 WDM1NP.Mzona... wit be on o r _ 1.110+ ...u... PO 8mf 221135.W. send dlitclI and SASE 10: . $B In adv.lley IITII.mion ''T~ Hambol. OM The ARRl..oc. 2 1140..oro. w. 11t.liCIlltl to flaCh sf.. Ian or i'I'IOf1l IdlooI clubll.. in commIt/fJlOl illion 01' Mzone... (407J 851-«J52...!. P08oII:al389.LA... He 28221.. 35 repeat. available. once tllId1 OIl Phone.."" . S15 at the door.FairgrI:luncIIf in Q1en.....642-4139 FAX:(305}tu2-IIUB.. For eertJl\caIe. NLT Mar. 4PNEST.. 3OG-24OO baud eden.. ARC . ContiICI DI>'lI ~ WSfFBP... dOOf .. 1rJ21 Holly fM Rd. GentIrM CW_ 14 034 MHz. &0<J21t11 ri/lChltit* HS.. He The ARRl.elllion ...hefI!I.. PIeutI OSL via KA'VFF.d " · lorl 12.lOlate the 10lh ~ of The AnnediIIo BBS.. Conlact MfInoin YaIfINICDR. Al....'"*OOd S .. F~: 10 rneterNcMee 558-28. (813. t ivonicl 1. II .. US __ or OX oounIry. (2 1t1) 923---3830. (5 13)351-«100. 8'.W.k. 1459 SoulJ1It1Hd. FEB 22-'olAR '0 fAIRBANKS . 20. Contacl SiN SovinsJry K8JSt. aI class phone end bartdI.. country (non·WNE). Tom Amaleur RepNtlr Assn. $6 at the door....peate. and6Al1ASaI. saturday'. 20 and 40 mel... Salem OR 9 7308..CN.. tlnporI IA 52804. Phone and CW ~ation wiHbe 0<1 the lower portions 01 the GfIntIraf IIIb-bendlI 0<1 15... Rock Island It 8 1201. Fl346QS... For VE E.... S Ind 4d SA SE 10 Nflil Co mn WMGWI. t lhe door... Buy. Ro!Isftrved table $peee 8' minimum . 141)40... hCIId itl21.-on wit tloId the CherlonfI HamfettICom. otl The CuyehOQ'l Faits ARC wiH SpollSOf thei r 37th annual Ha m.. Adm ... tluI pit-.. fCW) 3540..200 . F'N perking. Wheel chair accesslbll . quio:tId lor IIIlriet _ 100 OSO'I. ' tAl tor an SASE. . 28. Admeecn i.. btIntfiI 01 the InIemalion. Wrtle to 1991 Salem Ham Fill'. Aw~ VT: Certlllc.. Hudlon 0MIi0n E'cIo cation Tasl< ForoI.C' : (I) ~ or SingIlI 0pII . ...nt.. Fri.5. .ld R$(T} and ON t\ollHMIeI c:ounty ~: AN. OSL via IQi'J(C. TherI!I" be a 10'll0 COI\IIoignmenllMon .ISO.. Can D on Oln .'" The lMlnia ARC .... .. . do... kAUAI The Kall&l ARC lfriI~· ar l Station KH6HU /rom 2000Z FlIb . S ......hibiIotI. .. Check IHAMFESTS on our 885 (603-525-4438) for listings thet were too late to get into publica tion . S20 by . 3Jrd$l. riIIlrom 10 AM-3 PM ..~. pi!. WU. PO So" 784.2 'i mpl. Swuote Fl 34235. F.• .775 . I"Ir\dIIH" 12 frIo. (5 16' ~9or MMfr NIIdII NK2T. tend alerVfl SASE ""'" your OSL cen:I ao JDhn Tudoor a-o:zooz YUM A. . -. cIlIss. $5 al the lI'le ... F...10 VERN ON .. . and the Novice portion of 10 ~. Ortando ARC. FEB" _IS NEW YORK The Frftl'1 AnnlMI School Club Roundup (b fll. $find Iogslfaetim~"". The .. F. 1094 8HI Rd. CO The Aurora RepMl.l21.. Ml r1bOtO MI(IclloI School eafet. Tu o . -1PM. . C o ntact 5". 28. Aaporting--Setn loll and tIntry tom.. eootiPt . -....CA.. Contact GeM Ma rillo.. 2:20600Z Fib... MotIeyIA 52312.390.. Ml r!b<K"o MA 0 17$2 (508)485. Muhlply by nu_ 01 VT c:ounh2Is.. bOn FairgrOu""'.: Clla.. 00. Station N6RTV at 1500--2400 UTe ao com1Till11Ol"'ArnatIt/Uf RadioOlly 1991 . with _ aetiYlty on FtIb... RS(T). Co.. Stfd lhOOd OIly.". (704) 5/l8-71H I. Iita and " ..W.. Amateur FIadioIComput.. to Iotter contaetI ""'" and among IChooI fIdio clubL The wit QpIItdit . nil wII oper-.. e tc . .. ing ...oiI"01 8t 7 AM . 38111 Astt AVIl'... Scxoi"i No ' . ions: s-p Fe. c/o Liw>nill ARC. $8 at thedoor.. vrr 8C3.. E . poIntt ao sc:ore lor working WIBO.. . end bus la. 10030AlIA. (5 13) 53110 11 or . 30 mInuleI. .. prov. HfIIpitI W8JOlJ.. the .• M" nlP6litl' VT 05602No1. Loc:aI COrllilCtl vl.o 'illfcial ·· B·· _ . Doort apln at e AM. VE1NOA. tationt working 13 of Ver_ mon t' .:cfIMibIfI. FOI example. rslk-in: 145. pi!.28." n. Conta1 Nf1iI Hwf· .Itlon. puIeI1air at the Cl1atlontI ~ MIrt. . WNT AWlrd 10 . FE82 ·) (9(U. ApM.. .ler.. e. Special certiriClltlS to< highelt lICOfing s la lionl In CWoRTTY.may tHing theirown t... (<fO!1) m 9603 SeI-up ar 8 AlIA ..ration wit be baMd II: P&Cl&QO PIIlo:.~""lOi'" the landing 01 Captain James Cook.. SeI-up from Noon--ll PMFri. Routtt 2. SoK 38.rt Sch~' WlfW. CW OJlIIatiQo.115. $143 eo. IL The Oavenporl ARC will celebrate lis 2OIl'1 Y'fI"r by l'IoIting its 1991 Ham'est at Il'le aceA E. . (305. the ~ Courtly Fairgrounds on US Hwy. tloId its ninth ennual tWnIwt . S4 III U..Jvnclion AZ /15211.. FriKluflnclu : 20.... operala lrom 1400Z. Jtf.450 MHz. 13 in ..c.1oIdad ~ I.m Fa i' a t Ii'll Polk Counly Fl irgrou nds .050..llOCl." at 9 AM sh. and oper8II'I 24 ~ . 8H . 7..2'3llOZ aoCOft'IfIIlli. 01 GentIrM phone bend edge. 2 J3 J I.• SoJn I· . Add 20 bonus points 10 IOlaI M:IOI"IIor aoort<inQ W1BO. 14 . FEB 10 MAHSRELD. $12 at Ihe door. StMion KB1fZC lrom 1SOOZ FlIb. Tan' _in ' 147.rp. Add 20 bon. 21.. nab Gardent EJlhibitio" c...: 148....1857.. or RTTY sut>-Oandl...P. AZ The ""*'tola ARC 01' Mzo.ble8.ntd. hl k. $10 per.•• 10 g8'I specgl For ~ and "II"'.. 7040. F«idtyCA 922113. Provide a clear. .251. tloId . . lor Dayton~.: 146 . . WI'IefII chei< ..lllf'1ClM: 25 kHz up on the GoiIn1IfeI eo.Illf'1ClM: 28. AI( SIalion KL7KC" 01*.". Send SASE now tor off~ e ia' IC<l<a a nd log .t Ii'll dOOf ..nI Red en:-. NY The Long tl1alld Mobile ARC . is) School ClubOfWO'4'(gndlls K. FOfU.17$. (.. spantor . (AnY) 3620 & IlO kHz lrom IoA'If edgeofOCher bands.. ~ .411 MHz.. .(4" )589-2415 I n. . ~-HUi'I'OW of .25 fllPfl.bI... $25. YAR 15_17 ORLAHOO. IfInd 2 unill poIt. IiM:l' MA Of lllt5.. concise summery of the essentlsl detailS about )'OUr Spacial Evtlnt. $elleta .. .J05J ~9-5CllO SpNk 0I'tt to ReMn<abOn o. of W otlcl • Iy '-.. ... ROCK ISLAND. (lpM-illion II In the Nooiclt/l'Ted'I phone portion 01' 10 m!ItefI..... .. CNirrnan.."905 .. Jim 1oIcCIinloo.2 will be uaed!of working VT counilel al" AM Ind 9 P M EST..... 1 5 _ GfIntIraf SS8--21 .d Mel PM! _a_ by Feb. 9 AM. 4858 TNQIi COwl. FEB 16-11 SA RASOTA .. (41 3J 562.. o#)t ~ $55 (Thura...Pfa». lrom 8 :30 AM... Tl lk· in: 147. lo M.A""'O-~ SoKI7lllf.. ate durin. PoMOffa. PO SoK 482.. at Il'le door.• L(MJ/and CO 80538. . Please ssnd us your SpfK:/s1 Evtlnt two months in 8dvance of the issue you went it to apptJSr in.. lr. or CIlIl (503) 585-9554... fIdIo/T\I QpllaIOf' and_ - ...: 148.. F I'IqI.. .050. Tables $S in adva ncl . FOf c. . .. tend SASE 10 N«:WP.28IIl.11 CJPII.. !he Dade County YoutI'i F_ & E~ M'AIIII I.. n. c..lion subnlrt· ting I log . & oob.>Qt......l the 3111 ~ V _ WinIer Cami. $6.. FriKluerlC.. (3 1t1) 3tU-5«6 or Wfill 10 VA R.. tot'" FEB3 ANAMOSA. able. Cuya!>ogfl Falls OH «223.. ClpIrata no i'I'IOf1l than 24 01 the 80 ' ..rma". I"IMfVlltion dndtinl is 214/91.IA The JonH County ARC will QpII ate S I41ion NICWP from 12l1O-18OOUTC Ann""""" in eelebrabOrl 01 the FilS! of the opening 01 the Uwrence Community Cfl-n1er.. CW.275.oout 7 A M ..! indudn moleltor 3 nights.1oighI pwking permitlaod. (5 1t1) 198--23M NORTHAIilPTOH .. del ·'Au Iabln.'" The Algonquon ARC will hold their Ellrctrona fin M atk el and VE tr. s-P tablM: S20. 199 1 n....:1 3 . be ""' .. PIIlt1<irlQ. AdI" IQro IS. ... PA Reler. 2802 N . 5c:oring-VT "'ionI: 1 point per phone contact: 2 points perCW or ATTY contacl. PO Box 2 111.. SI.. Talk : 146910 .. TlIbIea $10 in Ildvaroce....575.. ..1Iarting ... 7120.. Bu<iio'llfon K5 """".2. 'lIidI N2R0.EX. SSTV...nce. ao c. SO.-' .. ploolnclt/. Oft eon- pei iodii _ be .. 40.lrom e AM-4 PM .. (Phone. 34'" SI .FN . conteinlIllibrary of ~ KS 7FZC. V _ AFlC lW1BD) wIIl'1OId a aso perIy from OOCIl Z Fe. MAR9_10 FE823 ORA NGE:. addrelS. $8 at the door. 1611'1 find 17t h.l'I ~ OpIIatiafi SEARCH)• • spoIiSOled by the CouncIlor the Mo... la la.. 2_2400Z Fe. Ru__A stalion mey be "fIlIOfliced tIvN IImI'I per band. '91 l. n. . T _ $9 in _.85.. Talk ~n: 146 . if you want it to lJPPBar in the January issue. . (3 13) 294-f7f>6 tor IOllfll appolnt· menlt . the running 01 the Elghth ~ Yululn a. p al e AM . . VE Exsms Sunday al 10 AM.F. PO SO" ISS I.261..94.00.280..1027.2 MHz... To PO llegiRei cal (704) 53fJ7313..050. P re-tegislfahOrt required.. 558-7.. Iabln $25.u . Hl*I ' Iol~ Airport ~-ses ~..ir~ at EIeetnaan '. VE Ex..21 . ARRLNEC &sms . OH The _h •• fJtld MQ. K5 The N_ho V...... ~_ wiI be held at Smith Vocational Schoof....aJrIrI T.. Advance tickfl!l $3.c:lOI. 3720. . . $find a SASE to< you r 8. =-<>.. ad". RoenoI<e Di- .. WR. S12 . FnfGowmo!oI. from 0800-2000 EST.86 . IiXll'1 Annual HamI8II.cl ret"'" AfJI. doutIlII . aetivi l'" include. or _ : AuftQAlpMw Aaoc.IIS and motll Into about CAMVNYCS FE814.27l1ON. ki WA. .S....21040.. ~fiMd OH ..po c. 8 ' 04 "" . . Cfl-ntflr ' rom 7 AM.r. WllWE on 146.28040. clay in lI1IP" port 01' . PO Box 54 7811.So: "S·· ciaII 050'../ARRL countIieI lnon-WNE). admis.. &9'. Tables $5 lor lndMduaII.I. the.. Tdgating Sl O. _ should receivtl it by October 31. AdYflI'IOI tickell 13.318 MHz.he . TlIbIes are $7 flaCh.~ $<lO (F1l. Logs _ c:IiHI'IJ II'lCAO on and 011 UnwI. II f. The bus . $fIlle. 20 and 15 meler bands. . . Iefwn CountY F~ lrom 8:30 AM-2 PM .... P laqUli 10 highflal·~ing VT staIkIn. TIler.. '*.. and Novice 10 meter phone bandI.." WEN. ...lIM JX 18~ The AnnndIo BBS. &changl-VT_ IionI -. For III' . RICKREALL. 144 .niFL 33 125. ON Of RTTY). Specinl cer... 2<1 10 COOi I. be given by the Motor City Redia Club. F L Th Saraaota ARA wit SpoIISOf ilS annual Ha mles llComputltf SIlow lit !he Sparta Arena. 0rI¥>d0 Fl 32854-781 1... Michael H .rltion '»adline lor !he Oaylor> H_ lion 8uI Tou. ..i..88 repealer..pl. plooilic. 21J238ttl Sf.llng Valefltines Day " om Lovel and.or sel arnateur geer. ChM"".. Robe".ld S I or 2lF1C·scao _ the COlI01 P'I''9''1 .• Oft. . Walk".• POSoK 39lS66".). du ring the cont. Contac1 BoO.... FlIb..... Talk· In: 146. ' " -.. Sl5 lor . ttl... 15...: 2S kHz up from the lower portion of the GeoII'. CUYAHOG A FALLS. .. MarkIt .... ReMr-_ _ be 'ee I '. A uniquft OfII'Ii1Ic:aIa confirmIn.nI Sled Oog Rece.130. FflIt at !he Durbom CMc Center from 8 AM-4 PM. CO The LoYeIand Rt/pHtef Assoc:.GI." bit held . Conlact SfaI1 Cohen WD8OOO. Logn _ ftcIudfIeochangfl inlo. county (Vtlrmont).".s.. (C) Club or WO'4' lnon«:floof)... 00el.fyrtIfI St.lntemation.. 8 ' • g ' . the ARRL and . nalure 01'. •. FOIl information A'IitiI ao ~ . C . Sel-up at 8 AlIA.5 PM Sal . M.. Tdc-ln: .. GOLDEN.. F~: GtInIt.rion. tpOf'IMIl' a Harn' .. 1imtI" peci<el.. RV parking.. and Sun AN -"1M Iabln.• PIIotnI" AZ """.hools.. 10.. I COOi . Or-.eompuI. (non-dubl.. For OfII'Iillc:I1e..llte r ( +600). PoIImIIlo: by3l18191.. be~. AZ The Yuma ARES . . BROOKSVIlLE... lilA The MI. tour 10Jungle Gar. the V. Adm_ion .. PA I!l12O (2151269 18ft co.5.. FL The HlImando County ARA .ovance. 2S kHz up from . S4 a t the door.m".cfMI 050·.. =z:lil.. _ • • 1. _ 1M'._.am ples of the ad vanced teatures DELTACOMM has to alief: • Bor"'" IOgdY" "O 1... . KP·1122O 22O-225 MHI . yLl L1" UR L -' PERFORMANCE PLUS .".8V SOOmah $lyI!!oI~yc.. ~ IU..II•• ... ~ConceptsInc.... _ _ PB-IS 12V BOOmah SS9.-::Accepted ' $4 lor S&H (WI Res Add 5'l\I Sales Tax) '\Q ~ PO Bo..m _ .l23t OH RlAO£RSlIMCE CARD DELTACOMM'· 1.. Here ar e a tew (Ihe re are many more) e.21 .. w . .0000000Y . U. 1It ~ .. __ _ _ _...00 "' ..00 Bp-85S 12V 800mah $76. Connecticut residents I dd 8% tu..1_ _". _.n file er. "'" II"III'OI'I'lI Sl2K ~ OElTN:OMM'. ~ lIUMJIlf 205967-6"122 S1GNAlCRAFT (D."m ._ .628.00 ClRCl.USlGIlIIISl'LIl• 10 ..""" ..." C_ '_11._ _.. u ""'AJi... 1tIa-M Picks I•• tura short ti. ....-. II _ "TV. Ie user . _ . _. .. I ... ...... ." NOW'" . KP· ' list PriceS l11 00 KP·2 Litl Pne....ale-.)-. r. ......et.K - ... t ~ Ioc ~s out 11>0. MIRAGE/KLM Post Office Box 1000 (408) n9-7363 Morgan Hill . • On-set""" HELP '1IIdul::ft _ I e .... . . ...... 1O tIIUCI . • ~. CALLUS TO OI SCllSS YOUR BAITERY REQUIREMENTS Su~. " >eW I II. n!y. _ n E..·OUl featy ....... oCuslom orlIers ma ~ [J . sea' ch and opecl""" 109 koq"""".A lOW COST POWER PACK WITHOUT PERI PH EX'S OUAUTY IS NO BARGAIN '_ ~.g .. 90404 CIRCLE 253 ON RIEAOER SlRYICE CARl) CIRCLE 246 ON RUD Ell SERVICE CARD ~\SUPER PACKS FOR ~~ More POWER from MIRAGE PRE-AMPLIFIERS ICOM 2/4SAT & 24AT BP-83 72V 600mah $33..~ -. .95 FNB·2 1D. sea<>..aj. .. fl ' ..I< t2· . 35243 hllIl snEIIG1Il osau..\1'"a:\'!: ... -. llads ~OI -*btIy lor he llrod'Iln tI'I h 'Illlnl Wnous LN. . during • -..... CHS _' XM _ ".50 BP-83S 72V 750mah $43.. ...00 • U_ fr~ lfIS1a11l1t...'... All in stoc k 0' I Vl il.. peo..00 Bp·8S 9..o ' 0IlI00 U J" SI:J-oln---Ht' .o 810/1l\I<I dum'll en. . ~ ""-_ FNB·111. VISA Of M ASTER ~...00 1n-~~ MMelI Mast·MounT Models KP·2flOM KP·2I6M KP. __ CQ/lllI INU . - IF _ . J..FAX 2030262"6943 . . ... . hqIef garl HI II!s$ ..15 A~d $4.. """"""Il !hoI 1r8Q'UOlf'lCy trom _ . JIIooOn..t....:!'llCommunication I .wlJ. while automatica lly generating a hIStogram ot treqlJolJflcy /aCllv'ty.. KP·l loUO Kp·2I22Q KP·210W0 If your dealer is unable to supply any of oor amplifiers or antennas.. W . " TV .".../l\.50 Bp·84 72V l000mah $57.. ••• I J . U ... ... _ . a lQu am ~ .. . K. p.. .1 "1_'" _ .Jl Iw tnC'• _ .. 1 MUI ~ J I W. · ~ ~ _ a .04 gives you a custom Intef face and optimized software that wi ll not just c couct but SAVE WITH THESE VAESU VALUES will maxmure the poteoner of your R7000._ ....00 Bp·84S 72V 1400mah $63. $2250 $61..._ .ogIO!I!QUI 'Ul UTUlS >Of t"ZIliWi. _._ W_ n . . .. VHf....264·3985 ..nur ' ~t u'ld in u.-I f ACTIVATID OIH III ·lII (J. ... ~ IIOlOllZlD I'( todD IlOWfI AGlTATOI• _~ l tSlt l'l • 1" ~ \ OSO more IOl' 11'_ dIsWa.9 oPacl<e{ ~ ·Tool-tr lll ~· 1 )"lM ~ men! ~ olJlSAOI ~ "*".... . AI." .. mltMl~U ......" n.. .Toa.4V !IOOmah l&5...2O-ot70 MH....5181.lh!'f directional oUc:eIm: f." I 'UO 1. iJfOOfom re<luces ne<!Id • "'lIIO lwItogram and . .oco.. ren . .." ..U l 1I . . _ ".2V 600mah $35... d'" 119 P.... n ~.... 15. •••' I •J _• hn _... at remote tape recorders during scanning. d du l' rI.. Mast·Mounl KP·2 models handle better than 160W and In-Shack KP-1's handle 100W of power.&_... . <:l'ia<'INIlocio..00 . _ .....Bandmaster Slgnalc raft!U Quam ._ tlI-i' Utl'l • REMEMBER.. ".. .Iei.. _ . It' 2.00 All models give you more than 20dB gain with less than a.'II. .. 0"= 31 64 C3habIl Heqlt$ f\ololo81Iam....g a'ound ~ -.. Solll!JbulY CT llM8lI 800·634·8132 In Connecticut :zro.t. ..-un m<INlOf ....." I<xOOS l< ~ spec1'''''' 109 • FuI WppCIf1 • SCM> r. ...00 ShlppinO !!o Han dling. _ .. " ".1.. tIlD1D IOUILCH CO" IRQl l. ROld... 0. t~n HtlVl" O" · SEND FOR FREE CATALOG- KENWOOD DELTA RESEARCH -==- JJ CM FNB·1212V SOOmah $45.-..typeol~_ l40 ~ _I "' _ "-""'" $299 1 ~c ot . WI 53213 FAX or Phone Weekda ys (414) 353· 4567 ClA'CU 2 541 ON RlAO£R SlRVlCl CARD ATV CONVERTERS • HF LINEAR AMPLIFIERS MOP:LIf I' U . Advanced priority c ha nnel moMOfing an d program control...cy "".- CA "'* IlijI. . .6V 1200mah •• • $65." - '_ '"'nM I U '" _ M.ow n arUn n.. These Pre-Amps are lhe best on lhe market for theprice. 4..eM Ne _ ~ • ~EtnS 1. lme.e. " 111• . _. ""'_ .... 12 m""lh wI 'f..2J2M 28-30 MHI 150-52 MHI KP· 1I 1OM Kp·116M KP·l /2M 1«-1 ca M H. FNB-4SH 12V 1lDlmah $71. MO. ' Ul * HUT ' I'" S MAII alf' l . $1 506. BIG SAVINGS! PB·25/26S 8.. 13677 ' Wauwal058.SA _ mlteMf! uH•...adS noise..-.. CA 95038 SAVE ON THESE POPULAR PERIPHEX POWER PACKS Bp·7S 132V1200mah ••• $65." n W..8ilo..eM ._ ... Check..!S--OOS'.. ....:Y.....l l ll'f'aC€& Co<-!IC"€"'1s 'CY Cao '"""""":".--..e"it lJfoleetiOlllna ov"cnllO' P'Dtaelioo. ' - .K " . .. We carryall 01our products in slock lorsame day shipment and wiHbe happy to identify a dealer who win acoommodate your needs.. JII' M• •_ Dftoo.". . cO"y UT U' _01..tOOl' a.011 FNB-14S 7... please call us at 1-8()(). ulOmOticall)' • Auto "oq.. . p<:!f1' COMI -CQM." I .. ... Ioll _ . Spectrum log at speeds in excess 01 1300 c ha nnels/ min. Ind ..1lIl PB·l llY lZOOmah · f U JI .."'6element QlQlI$ 4 fQo._ . ala lrom l umoril... by Channel.. .. .• 11 1 _JI M H .<4IOl t..-. Ioll S64 • • U_1PI 1.2V 1400mah $59. IlS514110 It.~ TV " frtlumu ." yOlJI fl7000..• . ...1 __.. . .' const~U09f!(l engoletl""O"A11 lOUlhe'ot/o.... 1_ _ w.-. Sequel 10 Ba. ..95 ADVANCED VISOt 15. $10. htraordinary hoo k. d"". SSB. ".nd AR03~6 · MOfMCode: lagi•.Whether you have dilf":" I. . Africa ."l>Cc «"".. nip to lbe slam. 9'hrough 13. operate. cffe«i'ene>' T~ E.. peciali'ed progranl>. RTIY Li. nd eketronie.00 ?~ roo ntr.. and !tto<e harJ ·".9 5 IOMOI 2. perspccti".f making ..1 by Anlhonj R. mega .. World 4 -<. abool 40 page. TN . 10 more eompie. of ARRL publicali"'" OIl build...i"" hook "'nnen on using Sm ilh Chan..' ama'eU" in lhe ""u ntrie.. $15. "'. Cord' wilh Key-"". Easier 10 read . 2 AI"""1 18.. C_ Adv. RUDAK . "'akini1 re "enl new.ving impedance marChing prubleom. Ide. mnlliltand... lcu _ 160 page..5 cellenr d iagram" 32S pp. 529." "..1O. Brand new' $9.<j#"'. pLaln-langu. by B. given e nough elO<:lronic tlteory to nnderstand lite e"".ankles on Yagi •.n~ Matching by WiJf red N.eru.. con''''I<·...panded by make the bc>1 usc of your . insurge nt" freedo musl anylhing you mighl wanl tn fighle r<. by . pace.1CI.''' World Radio referel>Ce materi. Wi ".000 licensed rOOio Concise gUide 10 2011+ . M.ern.lgn engi · wall cry'lal-<. yf:>. w. Gi". ubje<. anarchi>! r. . 07 R25 • The RTTY Lister>er 0'1'''''•.'...9 ~ il>C luded i. Build lUnel heacon liMing.."" Ii. h. a nlenna. Curti..OO AR4141 · W1FB 'soesilln Nolebook by no.. W3DK\' and mucb more $12.. edi"'n•. de. . Msnual and . Smith Chano ....i{' Ei. 110. for !iOOn. fonn ulas.ised Com mission'. .lio ama'eur< in all eou n· ra". prescnled Plk'ked wilh infonnat>on on how 10 na poIafilal. SHU Filled wilh . radio. v.need amaleUrs.~hrd co><.pLibr. Tell> ""ry'hing you need Ul know abou.here w•• poh.. worked 011'.ge _ i.milte" . '"' COSl.00 ' W .lel"''' Co lIlin.'" for ""ioU> DXe". well o rg. O. nalOC.li b lI'iIk" ."nng .nd broad · wha' go" r"" . Combi.I . Ihe defmili' e gu"".. of Amaleur Rsdlo by DoUR IN""". WI f"B undernland . Uanscei"r" ..e Ocea n 55. $ 10. 35 · l Greal C ircle Chan o f rhe World 4-<. on ven.00 AR2l03 • S Blelrrte Anthology TIte lales1 informalion on OSC AR.d Band A.AR2S4~ • Antenns Notebook le"ing..-"ption c eommunily 520.'.."..-"". S12. (2nd Ed) lion.llbook """ IOW020 • N6RJ Ori llins l2nd 0. S9 . II'IFB Here'."a (New Pool) IIlMOS COMOS SI9. eorr AR203O · YourGstew.. and e'Kllpullor Radio L1 ste n el'* snd cr<. 2 N<Wicc. you when and by EUR. 104 10 fJ09 1 • 1991 North page" 8''.. Compendium Vol.portlo W. Rule" . theory. $11...ru ."'bled inlo praclie.:k.00 " Pet_..ions..00 Com pen d iu m Vol...010r 30" x 3S" I World Ada.. 1M. Poslal lieeo.."nced levels of applied elc<. lorry S..im< grid" the 1991 Buye.: an Call · prefi. Tlle nK>S1 "ompre"".and lo"g-d i. Trou bleshooting & RePlli r 23rd Ed .OO Praelieal de..95 AR2472 • Tune In the World wl1h HIlnl Radio Kit (8th eel) Brand Ne w Edilion." radio amaS9.oIor 30 " . pplie declfuni..y ·' wealher· fa> ""lel h"..< (iocluding medem-d.: . urdated. "oo.. 02CW • Th...lghlforward lermsunobt. ide. WO'B Guide. Guide and more . w sre lot Westher Ssteillte H. popul ...riea . Com modore Pan /I Priee IBM Pan /I N<wice lllMOl COMOI SI4.. lCoChonl"8Y.imple.only Hsndbook by Wi/li"m OTT W6SA AR318S • The SSlelrrte . Bu"au 0 an'en""" . Co.00 " .. il>Clude upoJatcd FCC que"io"" mulliple cboice an..t e.00 Hand book of Am~"ur Radio-2nd Edlton by Cia.hem in .ooo ca ri""" Zone idenficarion.".. WI FB cress (P LR) To l>C Cluon. The IU10ri.for the ham .ges 6 In 81! NOVIC E VIS OI $ 1I... for """ing up your gear for comfortahle and emeienl opcra"..010' 40 " ...bou. 1989and la<cr.. 10 . Undc:rlined. lhings. Enrope. Yogi.rc.ver de· Colleclion '" .ia. new . .. We" Indie..y c'.play. elc..oI or 20 page' $ 12. Photos S29. A mlL" for e'ery oel. ~y Dr.. AROIb6 · Advsnced Clns F. i<k "". The rea<ler i. C.\·a . unJe " ta nJ for ma'..'..ach $6. ised in 1972.>.mining. oot. re. equ ipmenl.of evolution /Tom Slralghl key AR2626 • Comp. I...50 ble. . baluns.oo "<- AR2456 • FCC Ru le Book (8th ell) This New FAition i.) h. a nd lite Ca...U J .her unpuhlished in!" Amalenr Radio ... '"' " ... " " " .It kilo. falle.000 listing.n conI ne.. anre nna. II. WV.nn.kl W2FMf wilh FCC question pool.ive wire . 291 illustrari""..1 ehaple" in lhe fron' of lhe bool... u'y . perfonlla". more. beam" sw ~y Marri~ Davidoff K2 L'BC Expanded and reviSC<l ..nd co""'Neli<m of wire AROI94 • Antenns AR04I0 · YIlQI Antenns . . Cnde · leaching and "nde ·praelj c~ cas· senes included in the ..ica. 8 \0 " x 1011' conla.pers co.. . sec"". py. lhi.00 '" .peets of . om " . .ibbean i. Chock full of good... $15. a " an.. I I ..95 on mosl mOOel.ly ha'e avail... VHF-UHF.00 munica""" .ign "ngi"""r>..i " MS-DOS ftoppy $10... Book . . 10 illn"ra.y'IC1J1" . imple repa'r> I calion lode pth 'lUdy of ACme you.nce S 1 9. Il>Cludes: I Prcfi .lem" edilion of ' ·The s. Ha. your gu>Je 0lA87 • Th e SIlol1ws.m. among othe. Y".mher formulas.. TroJ I.ni".rJ •.r 0 1040 . . R8dlo H8ndbook.'ilu"rl (""w"n W21 bperlmenter's Hsndbook . Curren.. propagalion . AR04n • Low B. just lhe book f01 lbe avid builder of Amaleu.00 page• . know man'.00 Dr .-"pI< . Man". eompi. of c> S7. I through 20of .we". FOnIlul .00 ing .lue 1997 . .". SIO.. TrlU. B. i"ely. i". ndbook hy Jonathmr I. Antenns Imped. 1. installing roJio "":ei." a n.1 IBMOJ COMOJ $14..OO 24GHz C<lUipmenl...-.. fis ures. ion.. .nicle. SI8. Tell.or..nd UHF hands .567 pp..'. III< call'....wer to lhar Ifidy prublem.gns for anlenna lune".OO roore! • 12E41 • S econd Level Basic Electronics Pr-epaml i>J Ih Bu".snion senAROt3? • ARRL Repeate.. up A". 1eir· progressing through the cri'ically cuits and how . on No..nd experimenler. . GA. Map of t. SI2.he i." " .ric. leu. An'en. full Information o n over 100 raJ ioci ubs worlJwide . Th......enna• . 1 Mal eri.ncr New.ing readily' . imulaled (VE) samp le le>l . n. and .. .from lhe.... 59. pllbiKat.I"maa boo k Ii>!> 500.ble hook Ii.nu.il>Cd Ihrougho". Co mpanio n Short wave Answer Bool< by JiJIl Groll. Y<>II can ha~ tho "". I""th '.. s funda mental• .00 Ilccf up pacily a.sn lon o. Pul togerher a ""lion and gel on the ai. Dlnte lmy.ffordahle.prne nl.95 Oier 90 diag ram.he special inlerest ham radIo Hsndbook (68th ell.nd_" i.he fa" Nnflh America.m. OSCAR . anlenn". ed 10 knnw roJio comm uni." C. r. Iran· ".l1O AR2464 • Tune In the World Book only. n.1'Ul Pe" ou. and . l-I-'d/... hybrid. ." nd r d il io n now o . nan"ni..nd ch. Nolebook by Ji"..1 work.dlo by I"U".ocompur e r ...ttJ I'.00 urdared IiSli"8' for MS.cal. l.. inn line" .-y i>J Rddl" A_'ur. by Bud R<>tt" K4ilBT po. $20. It '. e.il.nl' Thi. Hi. lTa n. U<cd SUCC ESSFULL 'l' by .n. operalion. 4 -<. ~ 236 page<.9S mooore-padel connecl ion. ARIOB · TheOXCC NC..piJnI f'mt by Bob Gro"" MOM romplere li" of . . $5. Kumtmr KR IS i>J DmJr INMa..ign. periel>Ced .na· lioo-----<:irruil de. 2118!'P.ize am" n.ld A1ls s by 1/""10 "'mateu' CttJ/b<><>t In.y use•..·e. malo. a.. law""n. Jim R"ff''''' NMl) new ed ilion in an ea. S16.00 oItIa... -<> lOM44 • WO.. FI.bou.tlIBook Valuobie aid In the RF de. e unlinenr idenlifi. of Q~T a"ide. and Iltt Pacific a rea {e.e 64.. the Com · will pr<Wide lhe a n' wer< . S20. show llied and tru e eon necll o n.imed ARRL LJe".1 .. infonIla" on fOf clIOO'. "ansee. ioere..l" /(~H Cn". MOS1 comprchen.00 inlerferene<: problem. plu' Haw.onnly used sign. . on que"" . DX Powe-r: 600 nel listing..iee "um.." "..ience in ""Iving $12. SI2. of ARIOS6 • ARRL OperSllng 1001".qnipmem yoo need.ily .lii.Ito w." S I ~. nd S5. key infomtlltion on A"".no. fo... ntenlUl <elccli"".• ' r 1 Uncle Wayne' s 06S57 · 1911 Pa. packer operation . P 8ckel User's Bermud•. 1999j 314· di. .". 384 pages . of full COI01. level .imp!<: praclical projects lhal can be bnilt n. .00 Spiral ocei.45 Ltonze Code P rogrsms-(Avslls ble on $110 " d isk. p. and . Qui z on back. schemalie ' ymbol'. CamPl"" ing to figu re <>.00 lhe QRP opera. ncnl..i...on.. flexl. 03C O\l • ShOl1wSve AR2898 • S"""e Almans c Clandestine Conlldentl. A..nd of malerial. from I..pl.nd whal yoo need to be a successful licals .nd te<l equ. and other imeresl.. nUlte! $~. TN C<.00 84 page'. where to fInd .. a major up' grade o'er III< pre"iou. --(]wyn Reedy W t BE Only SI4..dress informalion for o'er m. mlc.. RS "'lei· lile. Ie'" eqnipment.~ 10FU91 • 1991 lnternstions l m SlI • SIlol1wave Rece ivers Cal1book Pn t snd Pre sen t The new 1991 Intemarional Call· F. y-l<}-u"" " . gi"n "" NO\'Cmber I . internalional rudio amaleur ". Find al· mali"... Es sy·up Antenn." • . rehe!. IOA345 • Besm Antenns S29.'irh effcc(j'e PrvpamJ by Ih. of . TIle reader wili leam aboul brwg". and .n .nd rhe new pack.ei'e .ft 01P22 • The P 8cket Radio H. Include> mierow avc r<:cei"in . . OO 'eur AR2171 • Hlnlssnd Kinks Find lhe an. INMa . po..Ite impon"nt .nd "r.. iL $19. " .. lh i."".. malion on C""'tNellon lo<:hniques AR237~ • Technlci8n Clu s AR206S • ARRL Anlenn. 20 pp. $9. r.. technician.) by nr.nd """'I high. tlle_. P"..95 Like III learn Itow 10 """'lruct low · .nlenn..... Gi". oonw"... lWdio for lhe Novice and $25. redtJCcl . SI9..nd OXlng $12.he world: map' o f all ".11 .ial M..OO loli ng world lime "'f"" ('If are lry.. Co mmodore ISAU02 • Scanner and 1990_91 Edition Ham '." suppli.oclt r W9KN l ~yDmJg INM" .·e rage . IS6 pp... from a simple I hard-'o-g'" QSL ""rda.ign . for the Techn ician tltrough your radio gear.nd more. ... Nonh Polar pr"j"':li"" .. by I" CalTOO J . $20.. o f everyl hing you w. and VA) wilh AR0488 · W1FS 'sAntenns C omp.'IS ntes of N<:><th Ame.ralion.e to u'ing and designing satellote" USlener'S Antenn.. "". ble romponenu and common hand mol• .atimrlll Broad.. thi.95 EXTRA VIS OS 14... AR219? · D."11 g. more.50 VIS Sl lKlyCa rda 07091 ' DX.sc"." '" OSCM • Commodore 64 OS H24.' ..nd 40 12E76 · Bssic Elect.t . M"y o KR. Thi.. fe"'nring 2 . SII."'".'er band.ric.."he .<elCCl ing. rnanufoclured . for both the CMI128 ConU1K><!ore' and Ille IBM compa libles.00 .bles... ~ page."mu. ..i.m """ will help you.".millers. TiJwn KSRSG 39 chaplers. . . 16PB6 . " ocking.am I.nd ine.It<""...""t' Fea'u.n. an"'n node.e. power supplies . The Blue Boo. will learn.ing on lho!.. J'<'w. /C aribbean ' re. lhe Co'er< .. .lli.di'w~y FmJJ. hook .ties t. . al"""'l 50 \1.. ROOio C<jUip"". lI40 page.. U KXK by (""rry f. lhoo<)' 000 practice in a... hard... Coo"nndo. menl of lhe . _C"mpac1 . _ Notebook 100<1. in .. "" .k IBM com palihle onl y. . hook inlf<>Effective Te chn iqu es l or ARI99 1 • ARRL 1991 Radio Am Bleurs du"".nd i fonnari"" on oo.ti No".ii ..95 Adv. Up-l<>-date Flash VIS 02 01 1\1>5 ' The fkoglnner'. . The oxec Companion spell' 0111 Gel lhe best performance oot of lalion of frequel>Cy coordina"".. lhe question pool..em .ridat your fingertip. from Pa na· ma loCanada il>Cluding Gree nland.ntl.. 00Ipu1C1"5 ."flicah. Schemal ics at your fingenip'.nUn. coo ntry by eou ntry: "'I I.. o How 10 meellltt ehallenge.ion aDd . 28 · I Map of North America 4-<.we r IgOO li. In am. l232 Serie. eaeh modd including eo .5O AIIL BOOKS AR22(K) ..Io-f. il>Cludi"8 : in"'rfad"8 home com AR2073 • Novice Antenns pule". . a n pro. and an.pecific infor. Il cove" Soul h 20 yea" .". m. of lhe malerial "o"red along lion s.n. n.'r RTIY a moniloring lechnique.wilh Ho".tellite. 10. .xl c. . . Com..odio h.nd pl.00 Design Compendium Yol . am · plif.. A gen uine nuts-and boll> ho"' Hams ~y Ed. filled witlt . ea'y-lo"'recr anrenn"~ Ltl. Itow anU""".i " com plete study guide C<J<I< program.". . of "". quads. H".ised . in "". Simply dial the Nonh Arner.pplic.. ). $13.. Mo re de· ARB83 • Gene. u<cd .< AR287 1 · W1FB ' aHeipfor New Hsm s i>J DouIINM"...00 AR2391 • Exlrs C1888 fundamenUlI..00 ly re8arded infOl'tnllliun un ""lenna a nd fo r lhe VHF.. IS .'leplember.•" "". c""strueli<m projccls for Learn how 10 hnnl DX ...9 menoe. "'peri.pi..lui inf<:>rmalioo on en TEC H • 09022 • Th e Wo. lhe ncwcommer Ihrough lhe male of new operating and lechnieal procedures."'n " . . perf""l fo r the beginner . . .ghly r.ompic. Orr l-I-'6SA1 Gui de hy RoMrl C.. . bre.'o.00 ARA341 • Interference Hsndbool< Wn nen from a n RFI .lue .i" of di. basic infunna· E'''a Cia"" accurate Ie" e." RRL Speeial Ser-ice Clubs ...11 c1aode."'. S. werkey•..an e'e'ell"nt piece of wor l w e n wunh r""din~ for burh .nd the U. SII.! .I><" ... and 00Beam heOOing'. of lhe differen' f<:>nll> of IbO..nt · Slep by ' k p Ihrough lhe . $19.c buill by . In.95 Am enc...W.onlcs ""'Ie.".u of ......t Stapaln ARRL Llcen.ur and JanaJhmr L Mayo WriUen allll< b• •".pture.igo. $14. 9S T<:ch lBM02 $14. " . Program.nd tran .h. 2nd cu"e" Mat c hi ng sy. mi> .. ".. f. 272 PII .n.ndbook ~ 14" MS·DOS ~oppySIO. popular mod<:: !>ow 10 gel m.CttJlb<><>t 11f".n ."... quad• ..S. citt' nit rype. leer .ror ics."" Also . If/FB Beginning with Tu"" in .onn.'oCd r". i"u.. 194 page• .100 ta where you can lUne . nd operatN. 0 1P044 • 44 Power S u pplies lot Your Ele<:tron lc Pro joect ~y Robert J.scm. Hundrc<l. and Paeif. ~.. from 14 MHl 10 OXer. 1A-l1 0"""""" A d va nce (he easy wa y wit h VIS Stlkly Canl... KY. . $15. sn . ..· AR2960 · Trsnsmlnlon Une Tf1Inslonne. propag.i i a nd lhe U .... . $6.. artI M••\'nll lo-do manuar.e radio v...y to Pscket Radio 2nd Ed ition mUn'Callons. . hed and e. 00 AR3290 • C om p a n io n S oft. .. radio ama teU!. ren .00 num . "ansml1le" .. S18.. Ing ""leg.'pen.... Yagi bean.Iue. B. acce:ssorie<.1 AR0402 • Solid St8te DesIgn "..1 Lsngusge band .) . from ing."r 1200 digipealer<. all here and easy 10 AR0348 • QRP Notebook 2nd Ed .. lechnician. . fr.. a ffCG uencie. B.'ion AR2083 • C omplete OX'er and pileup' . Ii"ening cnj< men' ea.nized ARl2S6 . np-l<>--<!<lle . Commodn.r. Il>Clude. nd for Handbook by Roberl J. SC.00 S '.rine brnoJe. chano.. Infonnation on lhe u<e nf di · gilal mOOes . ~y FmJ Compile.i" 2nd Ed.00 . ~ J.. RttJl'h Tdllprl WBSDQT HOI off lbe Press' Expanded and reviSC<l to reftcet lnd. praclical ad· wsre lor Antenns Olreclory 19 90.95 G ENERAL VlS03 9.." lWdio publis!lcd a ". o f receivers. articles lhal i. SIO.. 960page..ss Rcpte""''' the be" .riplion. $12.95 CO M02 Gener.. and io. h<~ nogh ' re". $15. 12g page'. di.19 91 vice on learning III< cod<: and i. expe...9 ~ lBM04 CO M04 E. See compo. diagrams.95 lBM97 • Amsteur Radio P 8rt 9 7 Rul e s {il>Clude.ld Ham Net Directory hy .nfonnalioo for all arna.he eirenits ma• • up accl.onlroiled lra""miltt' AR3169 • QRP Clssslcs neer .OO AR3193 • Westher Sstelllte Hsndbook (41h Ed. r OSA9S .-heel" fnrmal.. ARI250 · Log Book_ 109 """"ver>. M .~ Co mmunlc.he . .. $12. .' ... .. I Mail : " Compr<he"'i.hl" " . nd Koreo . ma' n f p... · u wo ntlo.e than 27.n ... k by S" b Grow '" muM" fllr 'O...i""" .." = "'pm _ n " .. dol'.. Tm" Aft..__'-.. _ .. af>d .. Quad do>iJ•• "'i. Cha.. d urillf 19!19..Flndinil Simplified .. Uncle Wayne .\·21J1'F .Iyb". e.. ... w" .I0_ Tho "a-... $ 12.. p. ..n y"" ... 121 ..ic>.. Ildiand """if.1_ hool""". COftOlnodiCla..c ... Co. for l llO ""..011 .or }r. .. 0c0I.. all _ .. ...!W I ' ShorIw...." of code . · let.:::~~~~j~:.".-en US C._. '0 '0 O'. cI.. ~ lrod I')' ""tvi • • I· i"" .i"n c h.Uft : y ".apc..r.----... Hm. "'"" 20 p<r.O k. $I '. hly illtk oed. hand.... is far . IUIC.. $ 14.. """. guide to hig h in'• •••l cn". .n .'.. ". be.. '0 t... survived ..."" ham . Tdnyp< . """" 01 \he TV s.."pie" on "....I" . "'.. Handbook 01 E ".. »<p--Io).·"mpl.. preho-ftoi~ dictionary of pno:t". """" Pr-o>ides "'"'. 4..... telephone .i ".....~ bc~inning O. ~ .." nd . I lllHo-do . .'i..... .widoatl . -. f'....c.lep.!ot OICW...ndcd IO~ """" I«d and sysooms...n ~ in..~ ~ 73T06 " T'ho Sl k k..AS IO .1< D.. . "h i ng ' y 5le m•. .g I.... o ve n r" .h. lh.......ie ...sUpdalOd all RTTY "". 1 Anlenn... Gibi/i... ""F..tt< N.n.I...1) . ""'ll . ... orders add $2..HancIboolt lWS42 • TN IOAl (} • All AbDul Cubiclol A."I' tot l:!O pp $U .. on hui kl i n~ om<I~ncy com""..*'. AIello All fi-o:queni.. ind """ SIO. Prcu.. C.." of IOdIn "T'""1...IwW .ho """"'lUm. i.p. _ ~ ... $ 11.m..widI~....vli.. DXe". 56. (3rd Edilloo) ... kin.. '..nd all 100 1 ei ... Tdt • .ks..r .... _ C o n.. h<~ .'144 I n ""'~.."" l76 PI' $ I'.poo ..poi nl '" poin' f""I"Cncio> fonhe .".... A.... from S'l9~ KC 10 27 .. ...i"n ..-... ".. twT! '. !iO ""n'. llon. 57 ...r_lic.. _ n. y " u · •• cOm. kl<nllf".. ... . • nd _ndicc....n nd."lenNI HIO'dbook....1OO ..w-n ""m·.__ _ _ I-/<'" _ _ . Tum. (Sl h Edition) .. ..-'. Y'Sl holm Ihrory. to I I SR97 • N"lIonai Oi'lfC'tory . .. II> lind o. q.J..... F." .ly ~·.. Ai.ad .he .1«1"". do-. A . ... $26.... for Ille ro ..·. .ymbol••1'd """"""100 ('.. .n._- 035208 • R8dioleletype Orr " '... T_ " _ " UA ES Ou~Ant.....-.·..... .. g. ------.... _-.•1'd lilt""! $9 ."".~~~~---c~. 19 pqes. y"em. "'*"i..rt 3) " F.....~ R8dio Amao:_ .........."""lil--011OO hald H.. (P. ~48 11"'-.. al'd ""'"".. 10~ pp SI2.. " .... .. (Pwt 2) .. TV n . -. From i"..:10 sh) . ....." I ~SOJ3 ' THE WORLD $4. SI~ .is . ndom cha..he ....ncI..SariIn-. " . nom $7. h."" "f """Id". ~ . Sputi>tI.. 720... no... ~ code . ~ .." W2U E'-ctronics Technology 0IcI1onery of f lmronlc...... :. I.. c:omp..I Wd l ll<pllind . 1921'1' S12.. p"" ked . .lOnn .r ..ci.9S $9. .. .. pk1cly updated .bin.d inmue...y...~~- I IEEllt> · Guide to EmbNay EIfIIon-vI CommuniCIIionll '" T_ b.. 511 ....".. compl.....m.-.10 pp ... this is by far tho moll complans..cr..0.... ..nI<malionaI_llI<1. f""""""... panl.... _.. _ •. unpmJi"........." thtI _ ... Il pot .sa OJ... £4.."Ull . /ia c un (l ~ 01WormaI_ • • Com"""""re sdccI- tot .95 noe Cornm cdo<. S WR It..).. Uncle Wayne's Bookshelf Order form You may o rder by mail. Em"'""'.'OS • Guide 10 R8d~ <'1uipmoft...iI. ~ Ii".'lIeS you lhe ha......n..u........ I.y Co mmunlc'tion.~ dlo .arly illu.."""" .""...er ~rm.." h .. \he """'-'l is lhor da ti Oil """'" Onerr"' o.. ill .. • • •y p une'uat inn . _u..i. or fax . Id :CS .... . .. ~ in· 'Guency Ii>! nr US Milila')' "'•... .... yn~ $S...".. . noe ...G.. hadg ...y-lI>-unde"land f..Shipping Name TOTAL I I Street I City I TOTAL $ .. Dno. di'«I" ')' <lr c mh.·S l)9P08"'.. h" fl wa . 00 p.' .n '''''''''' of fi•• -dero· ft...." StIo&rI c.dwtud M ...b _ _•_ _ ..r. • II f<>nltllll prof".. \he Cari bbean. n ~ g h ". _ y" " b.._ .. asy_ ~Hoildbool< ... ..n".... frum 4t..9S 'Po FAA. 0IJId<nurd ""l' 4 16 P1'.... Inc l""'" . ... VoIb) C. Io w ly! • _ ".. Ille COII m". on Sallllil.-.t. ." sendin g .. Allow 3 weeks I for delive ry. .. al .. aD . l MHl-:wJMH1.. 210 infonnl""paolod and ~1"". «*'<1'" . CvfH " 'lUl U T..\la..y _ """"""'.."5 O<I VII • TN Bu lc GuldelO M22l • US MIllI... H~ 2t\6 PI' $I '. _ hps.IftIl.."5 and 70CM..... Air Scan Guide to s.. Coven 03K.) ...-Iy-c)od _ft. II i.._ M"2U Go< dot """" "'" of >o:aDnrt C<». helpf'" phuooo. ---.. Orr " '6 SA 1I OI [W~ · TN llIulltlted ~E94 • Crash Courae in . c< of S Ul'li.._ _ • ... Ihi. ..* . you plain ..t lona: .. St_...' Yep i ~ f.nd ~ at S " pm .. """"" 11>0111)' to f""'O"" cnnpk..<k ... inchodi"..""". aid i. I Caaediu I. _....." "1..t . of 1001 CltcuM' S~SI".!ot 0.... "" ../·""". HMrVr...-.. '""I ~ical conMW... o p.••.... / O.-niftJ........ ....."....ou . d ..ac'ic•••••) MCp " r tile Tho c• . 1ItnP"'fp<r. y".•••• _ _. l}6 p.lion...----. F~ _ s-r... FCC. of VH F .."""'-_.. 0 11'68 ' Pif. f. Fan... Eq... ". ... o · Oi"""tory (7Ih ed ...' f""l... . on lhe 2 .l C4mmunicatlon. 1I.. IIIOf'e.! A]A f.. and ""'"". of l u..10• • ••11 Thl' bt.. .. S<!n-i<eo radio.letype (RTTY) StoIlona lImO paceo..:a. $17..". '"t ~>nw . will Ita~ '" ""'on"l""p y. ...." 2O-ycar .......et:ion I Card' L I I I State Zip O AE O MC D VlSA D CheckiMoney Order I Telephone: (603) 525-4201 FAX : (603) 525-4423 Expi. Ln ..' •. . "..w idos .. ukl< " ....) " U'"CO. ' l u .rcomo '100 f... . . well • • 2l . • M Hl of r.ctory 1990 Edillon prot """'. .'po.il h" on you.. Ion! _ _ _ .tr.....""'" $8 .irports .. obis fa<• .c.0.icense•. nci••..Yoclificalion H_bool< .p. t<dInic.. Ru/u ..Ied ..ni< •• i.....:II/... VLF l<>rmllhm .."'" . i"u. r... " $ ~. SS. 7..... 33.. ""r. £_... blen.~ .. a nd ""''''". . 09P}l • TN Pirat..'" 52 1.... -.J H.. KC lO<107l k C... _ 1T)o... hOC' u.~ 1 ' . .k...k pt. ... of Fnr<JY... Tu ning InlO Underground Md .ged) • •p..-too.I....ica· lboor)..· ilIli"".n I..9S ... W ". FtnI<tI.. ..uAES C.~(l ""f1 cm-er QS u fronllhe Sla.• OX.tlc. &t C.... I.1Od ""'"' ift .... t ... S12.... oily II ......... Ii.rt 1) :a).ntoc"..... ~rbact..... .ft'ioo . All payments are 10 be in US funds . .. httnoc .78 pogo>...::h (or "'~ aga.. Forest Road.prcialized "I.u".i • • natinn · hy·nali.n 2 ' . .hau" iv. (l( ~ ...m uniC'lion. "..". Go for dlo .....ihppi nos.....IIed ""'h '~"'I Ie". "POra". T«hni.. e..ng g ives . Ha Fldy aoo "0": 1"" ". . _..lHl-28MH1 OI.t_·... D.he ~ wpm .... SIIe llil".. .._ _ _ • ______ ..iM.. II"".....6 .$0 ICi..<t C"ol"' ling Ih.. . '-sa.0... Comm.. c""'p."'" nf ' ''''' so lid Iu.. Ii" of abb•• • i· ..95 13+ "l"" to )'DII'U he 7JT20 " ( . 1 '.ONIutlc.... ... Ille now 199 1 aoo 01«" 00"" in • >lep ·hy·. .....m..l · au..~ Di =~ " y i.SO .. e " h p. Sl h Ed .. pillS 1i.. in C " • ...n"g< "n mmun.•• . \he .... capah."'... with US M. itI ..... .. iMolify iog .... Attn ...ation Dale 73 Magazine .code I' ..' .."ld hfy.'11 -m Ihi.dI."on Wi•• bo .... 10 nu".-... A bo...·". Coven fC'li. ...h... o r c1C\'ui." . .... I-4"Y l 'u Hom 01 A 70 • Pr... 10A~ • Anl_ H_book .. Dope. '.y. it.... 16A24 • Verticalf ".·. I . Hancock. II F~2 • F.. (p.1 in mo" i. c-ompuor' ~... _ C'DIN'IIry ~o~_.h<dWC5 of I'oni.~ Ita k<1 ....... S ASA .. a•• se n' a' I] wpm . ..-.-..S. /u1... .' po"'" Frll'q llenc l•• b.."""'. Rad io CommunlCltlon.. ....9S 6 + "pm_ Th is iSi lle practico lal'" f<lt .....'" "n lhe rad in 'p«:'rum . sclooIarI) lfeII........' . -.1 . .. i n ~ mll... " 'i/IiA. . A aM ...1> Goooa.. .. i" a"..h A"..". . It.. (2 pogn..95 07A66 ' A... by lim<... NH 03449 ______________________ I I I . ..o ....nlon . .hallon.. r ."..... and compu. nd "".."'dueti./....1 Eme ••• ""y Mu . Hu nting: R8dio ov... ""'i".50 . ". ' _ of . ad """" .. . F~ Sipah .....95 II SMI I ' scanr..00 yOlIr"" C"". ~ . _ 1 -•.. n'~lUi • • ly "...ro ~ •• m"".· m<I ... I 'Fowl-- _ _ ...'h"... ."..a. _ ...bIa... pc (Of .....·.n. hihl.9S f"" •• CODE TAPES . fad..r... II. R<fori. F.ndbool< . ..tXIU... 2nd Ed ition . R~Io St. ico loobby. -. ill dot US.."" C ~kco """....... pl. f..laty ""mmuni. ..a..........." ')' .. M.. of cod...lIe"'"..-nic"'..-_ ..he: I Item # Title ety. D<:> i~ n ....""'1'> ''''. and .·• COhlid<Mlill Freq.... i""'. Wilh • p.. ... . COfU'''' M221 • US MIIlI.110 >llI'" """"'. A.. ms .... 8\'.... ___ . conorolkd_...· ~" ..... _"". no.1 R ~i o $ 19. ra l u llt io ...'doim . lnonpol . Price Total I I I I I I I I I I I I I I I U..... . AJ'I'ftCY Pt....w i"" . Iu. in f..de nc•• -en 10 lbe fain l o f " " rrr •• _ _ker·' ..•.... . Fed- . Commuaica.p<o _ $S.. SI7. Canadian orders add $ 3 .95 - ly'" 1L...o"i.h"• . lUC1ion . "...... a. Oi_... incl"" - C)(l • OITOI ' T.5 0 . ·. p.. !fecl>.SO 1>1222 • US Millt._e.. f••."'_. ."""~"'. u.... lullO ia pira'e hr..."""Id ..•nd if .._."'''''-..-.00 {<"""Y.. _ "".'llwuf Co ...) al'd 1..pII / . ..able• .... V HFfUH F H.. like wearp.. ~~Il . Code .. . f•••nc.hy . ItDIOf" ....ic. . ted.... b*r" E..."" l'a<iflC .".... .c. C_ . . OlSO( • The HIddftt SlgnM... PIT•..l.. I ..:ode ....'0'6rl.-.SO ... ....--_.·i. or Io• • n.ne. ..u""ft' .".n lir.of T<k ""..oo. mateuroperating praetices lol course. I am stunned l Maybe we ought to lei the FCC t1andle the delicit! True to lorm. .-. • 0 " .or Any . " )llalsosounclsliketheLeague is a bit milled over the fact that the FCC didn't adopt their idiotic are complicated proposal.. Y ou c a n expect " Good" condi- 111 . Sure. There will • • ]I II ".. Many hams are still bellyaching wer thisno-code license. we have wall·to-wall repeaters on 2 meters. Since they an use eansigns._. "lo " • w ill be jumping w ith signal s for a few days. but will we see a surge 01 interest in this hobby? ft·s not fikely. :II II • up. the AAAL is questioning the wisdom of letting these roccce Tecne have 2 meter privileges. The entire North American continent is full of 2 meter faceete-e.._ __-". March should be the best OX month lor all of 1991. It's a market· ing eoo public relations problem. 440. People who want to set up a fapeater on 2 meters generally mu st wait lor the owner 01 a current repeater to die belore a lrequency pair becomes available. . Stl'. This new no-ecce license will just make it mcee crowded. and the sola r tlux index reached a f a n t a s t ic 295 . The Tech nician test wilt consist 01 5S questions. Of st ay con- s t a nt. So much lor the code keeplng OUI lheri tlraff.I this point.. We'Y'll allheard just about every argument lor and against.. the League's reaction is what we've come to expect Irom those old do-nothings in Newington. !!i ill Ol '.. ishing IOuCnnon ttlis issue... " Let's save 2 meters for us 'real' hams and put the no-code crowd up above 220 MHz... marking an en-time high for Cycle 22. There will be no special caN sign designatoOn tor eocooe Technicians.. where we don't have to associate withthem. w ill be a good been commenting about how the sun h a d apparently reached a plateau . .or . . . as do the General. o 0" " ~ sun will do next.. Let's face it. . Ewn in map" ctes you can scan through dozens of repealers and noI hear aSingle. The only problem is that most of these rep eat ers are silen t. 2m. so whal's lhe point? The questiOn 0 1 ooccoe has been If· goad back al'ld forth tor over 10 years.. every area has its most popular repeatlm. Judgm!l from whatI've heard on the bands. when th e HF band s . Technician s will be given Novice HF privileges upon completion of a 5 wpm code test. administefed by threevctu r aeer e ~aminers (the same way all upgrade tests are administered). 1991 cex is 175 or higher.. be s ome good day s . The problem is that most people have absolutely no idea what amateur radio is.• • RANDOM OUTP. egotistiC batoney to just shut up1.ff' I(" 11 '\0 "!o . . etc). JuS! hsten 10 75m p/'lOl'Ie some evening.~----_ . II we pul all no-code licensees up above 220 MHz. as t he c hart shows. we may assume that they all haY'lllaken . - a t ions when the magnetic field " A " i nde x is 10 o r be'. Thi$ wouldn't neeessanty be a bad thing. as wellaslhegeneralwritlen e~am ._. Coming from a government 89llncy.2. he would be teo quired to take the 13 wpm code test. 1 daly you 10 prove that every repeater we currently haY'll in OpllfatiOn in thiS country is bemg used . We could quadrUple the number of hams on 2 meters. . Whatever your tavorite vie w. '! CENTRAL UNITED STATES TO : . February. and might even be head- one towatch.nding tirades ol the looney tu~ on 14.. Your best bet will be to i11 ]1 ~. ~ . orce we get 'em oQ2 meters.e. _. fire up those brain cells and you will soon reenee how absurd this statement is. let's get 'em hooked on HF so thaI they'll be motivated to learn the code al'ld upgrade. -- ... we·. no one can predict for sure what the ~ go 1'".. 1... (A. after considering eYery viewpoint. ..cr packet . code test.over. What would you say if we required all licenses to be tested in SSTV. Alas.. Now: February's d ismal prognostication.It'SlInally here . Peoplewtlo use IhlS argument must not spend 100 much lime Opllfaling . the highes t observed mean so .. How about the rude and diSCOurteous Opllfators on 1om. .III s unspot n u m b er of 200 l o r t his cycle w a s noted. and F e b r ua ry m ight well turn out bet- ed down agai n . tOllts .. and not a very etlicitml way at that.-- FEBRUARY 1991 w.. most people are turning what is an elegantly s imple solution to Ille nocode question inlOsomething much more cornphcal&d than il reallyi$.l A few oIlt1e 14. Morse code is a really fun way to commurucate. There's awtlole other COrllingent (head' ed up by our buddies down in Newington) who don't mind having a no-code class of license-but put them up above 220 MHz (which translates into " keep 'em off of 2 meters").· • • unusual cycle observed fOf at least a century . ter than predi cted..3 13 morons have made!tleirwaydown to 4Om. bul ~ could degettefate into anolherCB-like situalion. . There is no charlQe in any other license class. by itself.. .oce tor most oflhe day. O t herwise. Just about everyone who wants a ham ticket has been able lOge{ one. Why should we hang onto lhis antiquated mode of cornmunications as an entry requirement? Moslol us lose wllat litlle code proficiency we have 10 minutes after taking our test. a no-code license. around t h e 10th and the 23rd.. '"" 1 "' 2 '" P-F 3 4 F 10 5 F-P G-F 18 17 P 24 F-P P 12 11 G 6 F-P 25 P-F P-F P-F F F-G 9 F-G 15 F 21 27 F F 14 20 26 8 P-F 13 19 P 7 28 G G 16 F 22 F-G F F-P 23 G G-F .. has finally come up WIth a no<ode licenSe... large population areas may have several well-used repeaters. Adval'lCed and E~tra . we have condit ion s in March.. here is the re-cede Iicense: The no-code Technician tc eose will reo lainali lrequerocyprivilegesabcMt30 MHz (that's 6m. 1S lI III 'lo 'ro "lo ' . _- _. II may start down. cIon'l you want everybody involved in thai childish. Wi. but it is only one way. No body' s using them! Sure. Another complaint I've heard is II'IBI 2 meters is too crowded already._ _ . co n d it ions wi ll b e " Fair" t rend in g towa rd good o r poor. or EME moonbounce? They're all valid modesof communication. it wouldn't be tong until 88 they became a separate group WIth their own way 01 OOing things.. "lo "lo o . ~ ~. ' . a s a pre-spring An Unpredictable Cycle Old Sol fOOled u s again! For the month leading to usually peak-DX past severa l m onths.. and miracle of miracles rt makes sense! The lime lor arguing is no. W<.. and the solar fl ux I. The problem has never been that people who want to be hams cem pass the code requiremen\. when surprise. II a Technician wishes to obtain a General Class license. ~ eially dunng contests? te rs noI ignore the never-. Many sliNthink mat e code test keeps out the riffraff. the FCC lias announced the passing 01 a no-code icense. TtleFCChasprovidecl uswith agrealmarketing tool.. far away from the bulk 01 most am. We've an had our say.. With abouttwo minutes of blain warming you can figure out how desncctive this course would be.... but we musl take it a step at a lime). Sure. . The Novice test and privileges $lay the same.. Let' s use this new license as a way to introduce amateur ladio 10 the thousarn::ls 01 people we need 10 keep this hobby vi· able. increase our numbers by a lew percent.Tk<O~ PROPAGATiiiN'Foodba<k"~ Da vid Cassidy N 1GPH Jim Gray WIXU No Code So ..- ~ " - _. too. • • II II 0 . As we put the fi.. . In a nutshell .' a . - At the t i m e ot this writing.~ • ~ . teur Opllfaling. in November. .313.-. Current Technicians keep all HF prM. be the salvation of amateur radio? No. February . it's easy to say that Cyc le 22 has been the most o ~ . . 0 ..:' consult WWV for the daily lorecast at 1 minutes past each hour t o get a better idea 01 solar flux and magnetic fietd condit ions . leges I must applaud the FCC tor thiS SImple soIutoOn to wtlat has been an ongoing pain in the bun tor them .- -~-_ . Trends toward lo wer " A" numbers and Jim Gray W1XU 210 E. Let's h o p e surprise! During August 19 9 0 . Chateau Circle Payson AZ85541 higher solar flux numbers mean a trend to good OX. Again. . and there'd stiR be room enougtI lor everyone (unless you're a snob and don't want anyone but your lillie group 01 buddies to useyourrepeatllf). 220. n's a solution that makes an incredible amounl of common sense.-._. lliSmuchbetlertoputtheseMwno-code licensees right on Ih e mosi popular band-2 meters-anCIlet them learn proper.~. "liS assumes that there are proper arnaleur operatIng practices on 2 melers lor l1'le'se newpeop!eloemulaHt). The only way to teach a new ham how to operale is to put him on the bands with other hams. . The FCC.~ . II's up to us 10 use il 10 our advantage.. III 73 Amateur Radio Today . 10w.. Irs about time that amaleur radio entered the '80s (I know it's 1991 . This smells of elitism on the part of the League (i.