Fox River Radio League

The Fox River Radio League will be opera)* Ing a special-event station to OOlebmte Ihe FFtRUs 60th year of continuous operation The FflRL win be operating from the Kane County Fairgrounds Si. Charles. Hinds, on August 26.1984 from 8 jm untir 4 pm (COT) using the FRRL caii& rfjn W9GEO. Suggested frequencies are 10 * Hz up from the tovter portions oi the Generate ass phone baTds on 40 20. and 15 meters. Por a certificate or QSL send your OSL and an SASE toe Fox R-.ver Ftadip League, PO Box...

Fieldstrength Plugin Element From Bird Electronic Corporation

The latest addition to the assortment of piug-in elements for Bird Electronic Corporation directiotii.-.ii wattmeters is an extremely sensitive relative field-strength element. Model 4030 evpandg the usefulness of Thfuline wattmeters fiy helping opt< mt2e the radiated signal of any transmitter from 2 to 1000 MHz U is easy to increase the reach business or persona transceivers and to eilend Ihe range of HTs y tuning, adjuring, and posFtiomng antennas foT maxi* mum meie1 indication on ih hosi...

Info

279 ConiinentaJ Sat ell lie Systems .,5 Connect Sysiemsh Inc 45 * Fox River FladJo Leaguo 73 26i Glen Martin Engineering . 65 352 Grove Enterprises * Nam Radio Outlei 3 123 Hustler, tnc 66 48 MHz Electronics 88-97 49 Micro Control Specialties 30 & 1 Microkig Corp 37 277 RF Products - - 82 61 Radio Amateur Ca tlboot< J no. ,109 454 RadiokJt 07 RUN Magazine . -51

Abc Radio Club

The Amateurs for Better Communications (ABC) Radio Dub of northern Mlinots will oo erate KA9KOL on August 18-19, 1964, from 1700Z to 2300Z at the site tf Lfncienfest 34 LmoenhursL a northern llliry*s community and pan of the gateway to the lakes region, will celebrate its second annual community festival Look for KA9KQL on 7.2A0 to 7.245 and or 14.280 to 14.285. QSL SASE to Tern, Drews KA9KQL 37326 N. Fairview W lane, Uhe Villa IL 60047 The Cascades Amateur Radio Society GARS , rn conjunction...

Advertising Copy

Advertising must pertain to amateur iadio products or services No special layouts or positions jfe possible AH advertising copy mijsi Oe suOmiiipd lype written (doudl sp CPd) and must inctude full name ana address Copy limited to 1< X) words, maximum Count only words in teit Address Iik 7J cannot verity advwtismg Claims and canno tv-1 rw d responsible '0'c im', made tjy the advertise* Lability will be limited to making any necessary correc tion in the ne*t available ' oe 73 reserves Ihe ngtii...

Aes Branch Stores

WICKUFFE, Ohio 44092 28940 Eucfid Avenue Phone 216) 585-7388 Ohio WATS 1-800 362 0290 ORLANDO, Fla, 32803 621 Commonwealth Ave, Phone(305)894-3238 Fla. WATS 1 800 432-9424 CLEARWATER. Fla, 33575 LAS VEGAS. Nev. 89106 CHICAGO. Illinois 60630 1898 Drew Street Phone (813) 461-4267 No In-State WATS 1072 N Rancho Drive Phone (702) 647 3114 No In-State WATS ERtCKSON COMMUNICATIONS 5456 N, Milwaukee Avenu Phone (312)631-5181 1-800-321-3594 g 1-800-327 1917 No Nationwide WATS K 2S 1-800-634-6227 15...

Amateurtelevision

* APPLICATIONS Cordless porlable camera lo* rti - r outi> se.-, events, remote VCR. etc Remote control Of R'C airplanes or robots Show home video tapes, computer programs, repeal SSTV to local ATVers DX depends on nt-rnnfls and terrarC lyo ro 10 miles. FUU COLOR VIDEO 4 SOUND on sma I bo rrf * RUNS ON EXTERNAL 1 3.fl VDC 300 Or I ilU y m TUNEO WITH ONE CRYSTAL on 426.25. 434 0. or 439 25 mH* 2 AUDIO INPUTS For a low 7 dynamic and line leyel raudin Input lound m mosr portable color me r as,...

Astronomy On Your Computer

This DOOk by Burgess and Burgess) might on the surface, seem like a pretty strange topic lor .in wnateur-radic publication. However, Ihe computer programs presented in the 17 chapters of this little text have a lot to offer amateurs. But first things firsl The book is published by Sybex, Inc,. 234J Sixth St Berkeley CA 94710, and is 176 pages. fYtxj can check on Ihe current price with SyDex ( modest 1 Sybei offers a companion ie*t mat presents a coH- ecdon ot asironomiCrii programs in Basic...

Aug

The Austin Amateur Radio Club and the Austin Repeate* Organization will sponsor Austin Summerfesl 84 on August 10-12, 1984, at ihe Austin Marriott Hotel, interstate 35 at Highway 290. Admission Is SC.00 in advance (deadline July 31st) and 7,00 at me dooi Swap test tables are available on a f if si-come, first-served basis, but each seller may reserve tables in advance (limit 2 for Si.00 each and claim them by IQrQO am Saturday. Aciivities will include a 204cHz 2-meter band-plan forum a...

Augusta Ga

The Amateur Radio Club of Augusta will hotd its annual ham test on September 16. 1984, at Julian Smith Casino Park Tickets are Si.00 each. 6 lor S5 DO. or 13 tor S10.00. Features will include a flea markel in the parking lot. a barbecue, refreshment, deaiefs. entertainment, and on Saturday evening a hospitality room at Ramada Inn West. Washington Road. rooms 108-110 Talk-in on 145.49 - 600. For more informa-lion, send an SASE lo 0, F. Miller WB4YHT. Hamfest Chairman, 4505 Shawnee Road. Martinet...

Australia

J Joyce VK3YJ 44 Wren Sireet Altona 3018 Victoria Australia First discovered in 1609 by William Keeling of the East India Company, these islands are located 2768 Km northwest ot Perih, Wast Australia The Cocos Keetinq group consists of two main atolls plus several smaller islands. The main Islands are West Island. Home Inland, and Direction Island, with the other larger ones being Prison, Hors-burgh, and North Keeling On these Is-lands1 the highest poin above sea level Is only six meters, which...

Bpo

The President of PRAA, Prof. A. Zteiin ski, sen a telegram of condolence to the ARRl hecause of the death of the President Of the ARRLt Vic Clark W4KFC a well-itnown in Poland American sender Lately it was announced thai District Verification Boards had brought 860 ill* dividuaF and 193 cTub licenses up to date by the end of November. 1983, This is not many in comparison with the aboul 12,000 Polish radio amate& jrsL

Brazil

Gorstin Rissin PY1APS PO Box 12178 Copacaoana 20000 Rio de Janeiro, RJ Brazif On* day before my fast Irip lo l he United States which was on April 7 I re ceived 3 telephone call from Ricardo A A da SJIva PT2RS. one of the members of the Brazilian Amateur Radio League (L BRE) stafi Ho lives in Brasilia, the capital city, but he was in Rio de Janeiro for a tew days dgi> to his job. First of atl. he passed on the message from Vaimir Jacinto Pereira PT2FA pres+-Oerv o' LABPE congratulating 73 lor...

Breakthrough

Following my previous comments on breakthrough in the 2-meier amateur t> ar d lf n the ne ly-legalized cable TV n rhc UK, it seems that problems may also oc cur win plans for Direcr Broadcast mo by Satellite (DBS). The BBC has been given governmeni permission lo hegin transmuting DBS signals in 1985 B6, and mangfac turers already are looking at domestic receiving equipmenl requirements. The European DBS bands will be around 11 7 GHz and oesigned for reception with a 1 -meter-diameter dish....

Ntk

Ce coupon e i cchaiigcabfedans tous le pays de l'Union pe tr e universelle contre un ou plusieurs timbres-poste fepr scmant I affranchissement minimal d'une ietue ofdmai exp diL-e j l' tranger voie de surftice. Pu* rie verni h ndi tiori f.r uM aw- Tutore 1 h 1 UiPHi-ju qui tifpc in- i - ti ngo F 9 1 The urr nt ver. ion of the tM& nauonai R ply Coupon mth Ihe pt ce prep inleti in We canter. Only RCs with * sramp of the tssutng country on the left d e vaird at the post ofttce F g 2 type of HC...

Tzq

Cecouf n est changeable dans oos les pays du l Unign postale universelle contrf- un au plusieurs limbies-post repr sentant laffrimchi isemer> t minimal d'une le tre ordinaire, exp di e j l' tranger par voie de surface. Empteime de corn ro t* du d'origine P-t de jente (ir.qicantjn fscuhariwo

Ca

All mode operation (FM, CW, or SSB) Automatic Antenna Changeover See the complete line of MIRAGE amplifiers at your local dealer, or write to Everett Gracey. COMMUNICATIONS Morgan Hill, CA 95037 Put your computer on the-air with either Interface II or the new Kantronics Universal Terminal Unit, Interface II is designed for use with the Apple, Atari. TI-99 4A. TRS-80C VIC-20. or Commodore f> 4 computers. Suggested Retail 269.95 The Universal Terminal Unit is compatible with IBM, Kaypro, TRS...

Call Long Distance On Your Handheld

The Model 335A will deliver 35 watts of power using the latest state-of the-an ein cuitry The amplifier will operate SSB or FM and s compatible with most handheld transceivers, including The TR2400, TR25 0, IC-2AT. Vaesuh Saniec. and Ten-Tec Only 300 mw tnpul will deliver 5 wans out 3 wans m will deliver 35 watts out. Maximum input dnve level 64B Nc t1h Ar.iifijrh Ave t Daytirn Ohl 96-H 1 1 Our products are backed by prompt factory service and technical assistance, To become familiar with our...

Call Or Write For Complete Details

At so tw tebtt tor remote ste i kinQ c o-ssba.itf. and mote base SENSITIVITY SECOND TO NONE TYPICALLY OA 5 uV ON VHF. 0.3 uV ON UHF. SELECTIVITY THAT CANT BE BEAT BOTH 0 POLE CRYSTAL FILTER & CERAMIC FILTER FOR GREATER THAN 100 dB AT 12KHZ. HELICAL RESONATOR FRONT ENDS. SEE R144T R220, AND R451 SPECS 1M RECEIVER AD BELOW OTHER GREAT RECEIVER FEATURES FLUTTER-PROOF SQUELCH, AFC TO COMPENSATE FOR OFF-FREQ TRANSMITTERS, SEPARATE LOCAL SPEAKER AMPLIFIER & CONTROL CLEAN. EASY TUNE TRANSMITTER...

Cci

Listings in this column are provided free ot charge on a space-available basts. The tot lowing information should be included in every announcement sponsor, event. date, i.'me. of see. city, state admission charge at any), features, talk-in frequencies, and the name ot vthgrn r o con tact tor further tn forma sr- ''nno ncer ents rrw& tbG recervedbv 73 '. ig- mt- ay the ttr T ot the morfti. iatj month s prior q the montn m v+htefi the event taxes place Mail to Ec> toti t Offices. 73...

Cherokee Ok

The 2nd annual Great Sail Plains Ham-fest will be held on August 1954. irom 9'00 am to 5 00 pm. at the Community Building on the south sJcio of the Great Salt Plains Lake In north central Okla ho ma. Features will Include technical forums organti.i ional mee ings, free swap tat-ies. refreshments, Now ce exams, and i noon poi luck dinner Ov maht camr mg and RV hooKups are available at ih Lakes State Park. Talk in on the 147.90 30 Sail Plains repeater For moie information, *ri te SI even Wa z...

Ci

T1-T4, ZD1, R2, and C5 form a circuit that thinks it is a multi-farad capacitor. The capacitance of C2 is multiplied by the beta of the Darlington circuit formed by T1-T4 The current demands on T4 are not enough to require a 3055, but they're cheap. I simply selected one with a beta of about 60 for the driver This particular circuit is about 10 farads effective capacitance and the output rippie to the regulator is less than .2 volts at 20 Amps (p-p). ZD1 provides a clamp to keep the input...

Clairemont Industries

7573 Convoy Court, San Diego, CA 92131 Phone 6t9) 268-3583 TLX TWX 910 335 1281 All Mi lUl Operation wtth Rx iVenmf Kevine AJ Mode Of -cTaQon R* Freimp compact Sue(3Vi* XI'X 7') 11 (Oft 2 Meter Dual PurpoNt-' Amplifier 10 Waruln 80 Waith Hui 2 Whtta In 30 Wut Out B2IS 2 Meter H 1 Amplfier 2 Watt In 150 Wut Out B10I6 2 Meier Dual Purpow AnipMiir JO War In- 160 W n Out 2 Watts in 60 Wut Out B3016 2 Meter Amplifier 30 Wattf In 160 Waris Our Operares wfili 2 ro Wattt Input Atl Minie Openrii-n wiili...

Col

D jinn ki4vnB kim i alla liil viirldkpiv.i- n n t cnb ri i l niler LiLbytiB moi cli I I' .1 lrni Lrtcri 1 i-Il lTE bdfipp. mnl-.vin .111 Je ti - b 1 y -dV L Vn n-r ttt vanJeyL htcv nv tnkcl vlLtuu till utEuidcL C' lis L r .Kl poswtff (1R1 ' 'fflftJi foi Lir un limbtTi-pcTHic 1 -i s dmbm-potiE ivrii m iinnl 3c mont ni Jt l'affraudmicNiiOl dlVift lettre ofriiirtnirj Je port iiiipJj J li-r L iLin J c ic,JnpL T.

Communications Specialists

426 West Taft Avenue, Orange, California 92667 (800) 854-0547 California (714) 998-3021 lop with eithe-r or 3 IRCs or a 'green Stamp. One other aspect of operating from a fain v rare one is the different way one has lo deal wih the pileups. The Japanese are superb you have to call only one or two letters or *orx by prefixes and all others keep Quiel until you have worked that station boy seem to know instinctively that more poopie can and win oe worked mat way .v en -orking Japanese by prefixes...

Computer Interface

Lets you send and receive computerized RTTY ASCII AMTOR CW. Copies all shifts and all speeds. Copies on both mark and space. Sharp 8 pole active filter for 170 Hz shift and CW. Plugs between your rig and VIC-20, Apple, TRS-8QC, Atari, Tl-99, Commodore 64 or other personal computers. Uses MFJ, Kantronics, AEA software and other RTTY CW software*

Computer Interfacing

Last month we cammed one imp men tat ion of rnemory mapped 1 0 control. Now we will examine another method, employed in the Alan and VIC computers as .veil as man, others There a number of integral.- circu ts known as 'nput ourput ctiip or -.i pport chips, that are designed to work in conjunction with ih* 502 microprocessor (The 6502 is ihe microprocessor liia1 both the Atari and VIC computers use. These chips simplify I O interlacing and eliminate the confusing conventions thai other...

Connl Ctqr

I The four A tan player connectors and the pins that correspond to HA 6520 connections. The PAn series stands tor port A antf the P& n series is for port B Ur> marked connections are used tor paddte ana sttCK trigger connections, and are not connected to the PiA chip. plicated because ihe computer uses this chip for its own internal purposes recontig uring it may cause the computer to du strange things tan wjiI dear up when the computer is resrll. or powered Oil and onl For example...

Controller

The RC-850 Repeater Controller is creating a New Breed of repeaters. Providing the ultimate in reliable, versatile communication, with the most advanced repeater autopatch available, and synthesized linking to other repeaters. Its mailbox, informative ID and tail messages, and user signal diagnostics make it your group s Information Center. Plus two-tone paging, site alarms, and remote control functions.With remote metering to let you troubleshootyoursystem from home. Its built-in time of day...

Copyright By

AMTOR U. AUTO AMTOR X, AUTOCALL C. COMMANDS 0. OPTIONS Now Available for the Commodore 64 Computer in Two Versions MBA-TOR 64 Software Package Only, at 119.95 Suggested Retail MAP-64 2 Software with Sell-Contained Interface S239.95 Retail CW receive and transmit at 5 to 99 wpmt auto speed track on receive. 8 bit ASCII receive and transmit at 110. 1S0 or 300 baud. 5 bit Baudot, receive and transmit at 60, 67, 75, 100 or 132 wpm, * TOR, receive and transmit ARQ...

Cw Interface Cartridge

Interface carriage Gives *> Q 95 excellent performance ' SiS MFj-1226 under weak crowded, noisy conditions. Works for Doth ViC-20 and Commodore 64 Plugs into user's port. A pole 100 Hz bandwidth active niter. 800 Hz center treauency 3 pole active lowpass post detection filter Exclusive automatic tracking comparator PIm and mlnui CW keying, Audio in, speaker out jacks Powered by computer. Includes Basic listing of CW transmii receive program Available on cassette tapet MFJ-1252 (VIC-20) or...

Cwp Award

Issued by CW Potropolls, the CWP award may be obtained In three different ciasses. Contacts eligible only two-way CW mode, after December 1T 1983 Class I-- Work 10 Brazilian Chties plus 2 contacts with CWP members or delegates Class 11-Work 20 Brazilian cities plus 4 contacts with CWP members or delegates. Class in-Work 30 Brazilian cities plus 6 com acts with CWP members or delegales. One CWP member or delegate may be logged more than once bul only if worked on cM'crent dates or hands....

D

Aside from the benefits of dual-frequency control, an LMO offers dial accuracy approaching the level of digital readout. The circular diai reads 0-100 kHz rather than 0-500 and rotates five times per band segment instead of once. The 1-kHz markings can be visually interpolated to 200 Hz. Another advantage is that warm-up drift is almost eliminated The LMOs stabilize much faster than the original vfo and the sohd-state version operates at room temperature in its own cabinet. This limits warm-up...

Deadlines

Copy must be ieceivtKl > n Peterborough by the 5th of the second month pr* ceding the cover da to copy is received alte- Ihe deadline, it will be scheduled to run the following month, unless specifically prohibited by the advertiser Send to Advertising Department 73, Elm Street. Peterborough NH 0345ft COMPUTER OWNERS uper now MFJ )22A CW RTTY ASCII turmlflai units, Send recoive CW RTTYA IC-20 and Commodore Si software. Full icatured, dish or cassette, Kantronica. too. Low prices, speedy...

Dealer Directory

Jun i fcbctronics. 3919 bepidveda Blvd Culver t ty CA 90230, 0-80 3. Trades 403-138 San tego, ffi- m iRwiv NVJ. Complete tints JCOM. DeriTron, Ten-Tee, Mitd , Cu ic. Lunar, over 4000 electronic products for hobbyju, ttftchnkiflft, (iipetl-merrter kltifr CD radio. tarfdmobjle f-ontana Electro ies, Sierra Ave Fontana CA Hay area's newest amateur ractio stort. New & ilslhJ am& teur radio 3aks ts service We Featutp Kenwood. 1COM. Azden. Yaesu, rIYn-Tec. Sanwc k m m mShaver Radio. Inc., 1775A...

Dealers

Your company naiDG and message caii contain up to 25 words for as little its 150 yearly (prepaid) or per month (prepaid quarterly), o mention ol mail-order business or area code jermitted r ircctfun.- text and payment must reach us days in advance of publication. For example, advertising for the November T8< i issue must be in our hands by September 1st. Mail to 73 Magazine, Peterlx> ro( igh NH 0S458. ATTN Nancy Ciampa, Tired of paying too much for your Ham gear The new generation of Yaesu...

Deluxe Versa Tuner Ii

Match everything from 1.8 - 30 MHz. coax, randoms, balanced lines, up to 300W output, solid state or tubes. Tunes out SWR on di-poles, vees, Jong wires, verticals. whipsr beams, quads. BulIMn 4 1 balun, 300W, 50-ohm dummy load. SWR meter and 2 range wattmeter (300W and 30 W). 6 petition antenna switch on front panel 12 position alr-wouno Inductor coax connectors, binding postst clack and beige case-10 x 3x 7 in

Dire

New Technology (patent pending) converts any VHF FM receiver into an advanced Doppler Direction Finder Simply plug into receiver s antenna and external speaker jacks. Use any four omnidirectional antennas Low noise, high sensiiivity for weak signal detection Kits from 270. Assembled units and antennas also available CaH or write for full details and prices H DOPPLER SYSTEMS, < 602) 998 1151

Dm Digital Multimeter

Ranges and 5 functions 3'-i digit, it inch LEO display automatic decimal placement automate poa ty A 9 drgit counter mat wilf outperform units costing nund reds more gate Indicatoi 24nW & 150 MHz typical sensitivity 9digit display * 1 ppm accuracy * display nold * dual inputs with preamps A versatile lab bench counter with optional receive frequency idapter, which turns Ihe CT -50 into a digital readout for most any receiver * 25 mV h. i5t) MHz typical sensltivily * fl digit display * 1...

Eauwbhfy

Two hundred twenty-five Inches of rain That is a lot of rain for one year. it does not rain In January or February, but it gels very hot and then there is the Harmatan. The Hamiatan Is an atmosphere ol fine dust -hal blows across LI beriafrom ihe Sahara Deseri it clouds the sky to an altitude of over forty thousand tee' and here on Earth i covers everything inside the nouse and ou I draped a heavy cloth over my radio equipment, but it did not escape. The dust did Its job It got into everything....

Elections In

On eSisf March me annual G'.rtef a I Assembly was held m Lisbon to jp prove the accounts and to elect a ne* board Of directors for t984rfl5 Due to lt> e absence of candidate lists the Assembly ejected an administrative commission of 5 rnernters vho should prep-re (w n< ,v flections m 3 year s time We are sure that the nev- mem& ers a.II continue Ihe hafd and exhaustive *ork thai ts involved in an association such as REP and all rho important affai rs like reciprocal foreign censes, into...

Element Background

I Sen A) Male 07 Bi Female 3 No surprise here AM 5 or below Bf 1& -21 5 C 22-39 27 O 40- 303 EieOor above 27 the graying of amateur radio These numbers 6re heading upward with each poll. 3) License class A) Novice fl B' Technlci a i 12C. Cj Generar 31 D) Advanced 39 & Extra 10 Somero* i expected -or> f* ras to re spend B) 1-5 years 31 CJS-10 years-13 D) 11-20 years 32V, E it y ars and up 22 Just about the same statistics as fast year. 5) Do you nave a new post-Varen J78i call The yesses...

Entries

Deadline tc-r logs is September eth, w.th enrrhes addressed to R 4 KofiomkOASki KA1SR, 5 Watson Drive, Portsmouth IRi 02871 To become a rneiliber of the 160 mettjr Wtldbuncb between Juno isi and September 1st US siations work i0 ohar ter members. OX work 5. From Suptember 1st to June 1& L double ihe number of OSOs required to 20 and 10. Send tog tnfo and USSi-00 tor rfv noerehip certificate and Wildbunch nun> ber tc Bob LeBlanc KAtFDS Unity fioao Benton RFD 1. Box 300 Clinton M MV ILLINOIS...

Exchange

QSOs Ajith you Own counlry count 5 pomts. Other countries in the same continent are 10 pomis Other continents are points, in USA, Canada, and Australia, eadh call district will De considered as a s u pa rale counlry Use Ihe DXCC llsi and Ihe above-mentioned call areas ior multi pilars Note that contacts with a station which would couni as a multiplier must be found in at least 5 logs or a contest log musi be received 'fom the multiplier station m order to be .a(id, F,na' ac s Ih'r sum ot QSQ...

F

Mcsjiip ZZ.4'I y< -nr only, fundi drawn on L S bimk. Foreign Surface 52 5,00 b I verar only. US fund* drawn on US bank, F reijyi i iii- i lease LTuquLrr Plcust-atlow 8 vu-efcf for Jdlverv. Amateur Radio's Technical Journal PO Box 931, Farmingdale, NY 11737 . 10 160 M HF TRANSCEIVER 15 M 15 METER MOBILE The New NCG Tri-Bander is now available The 7-21-50 gives you the bands and quality that you want Discover the fun and enjoyment of operating on 50 MHz. The low end of 50 MHz is...

Federal Republic Of Germany

Hans J Scnafk DJ8B7 nammarsk old-Rmg 174 D 6000 Frankfurt 50 Federal Republic of Germany The IARU Region 1 Conference, 1984. took place from April 7lh to I3lh, In CeFalu, Sicily. Back in 13811 the last Region T Conference, in Brighton. UK had voied for Ita'y by a plurality. During such meetings, which are held every three years, the member national societies agree democratically to Important decisions and suggestions for Ihe future That means thai single-nation interests have to be combined on...

FF

You input the cutoff frequency and Q of your design, and within seconds vou get a graph for that exact filter. The graph shows the decibels of rejection as a function of frequency The program can combine up to four cascaded filters and mav be used for low-pass, bandpass, and high-pass designs. here are several other options that help make this a very powerful tool for those who enjoy tinkering with active filters The program uses the two HIRES screens in the Apple for the actual graphs. When...

For Load

Connecting a device foa TTL circuit using an NPN transistor. corder is sent lo Ihe television set. The abili-V to control a casset - recorder rrai-< - it possible to have computer-control led m structional material supplemented wilh re corded voice or music Commands to con troi a cassette recorder are as follows POKE 54018,60 Turn casseile rmolor off POKE 540T8kii2 Turn cassette motor on The music, voice, Morso code, noise, or any malarial vou have recorded on tape will play through...

Free Mfj Rtty

TAPt AND CABLE FOR V1C-Z0 0 OROER MFJ-1Z MFJ- W FOR ViC JO OR MFM2H MF.Mtt5 PCF C-W Use your personal computer and communications receiver TO -eceive commercial miirtary and amateur RTTY ASCII AMTOR CW traffic. Plugs between receiver and VIC-20, Apple. TRS-80C. Atari, Tl-99, Commodore 64 and most other personal computers Requires appropriate software Use MFJ, Kantronics. AEA and other RTTY ASCII AMTOR CW software Copies ill shifts and ail speeds. Twin LED Indicators makes tuning easy, positive...

Frequencies

Any frequency but looK tor mosi aciivi-ly, aooul AO kH fr< j.m ow end un CW, and about 3890. 213 & and 286 5 One QSO pomt per comacl oi t o poinii if the other Mdtion js a NOwce of Technician in a Novice bar d tllmcHS sts tions multiply QSO poim io ai by tne total number of stales (50 ma*) ve vo call areas (10 ma*K and no more tnan 5 non-W K VE'VO DX countries worked tor a maximum of ( multipliers Additlon i DX contacts count for QSO points bul not lor addiiionai multipliers. Illinois...

Gainesville Ga

The nth annual Lanierland ARC Hamfest wilt be hefd on September 23. 1984, beginning at 9 00 am, in the Holiday Hall al Holiday Inn, Gainesville GA There will be free lables and an inside display area for deaJeri> reserving in advance A large parking oi will be vaiiaoie for tne free flea markeT Otner leatures wilJ include a left-foot CW contest, a ladies country store, and many activities Talk-in on 146.07 67 For more information and reservations, contacl Phil Loveiest KC4UC. 3594 Thompson...

Georgetown Ky

The Sluegrass Amateur Radio Socieiy will sponsor the Central Kentucky ARAL Hamfest on Sunday, August 12, 1984, from 8 00 arn to 5 00 pm, at Scotl County High School Lonlick Road and US Route 25, Geotfletown KY (off 175*4), Tickets art S3 50 m advance and 4 00 at the gaitv Tfi. ro js no charge- lor outside flieamarfcet M e Feature will include technics' *o I'j CTp awards, and exhibits in a c faci ties W Tmore information o* tickets, write Edward 8 Bono WA40NE. PO 3ox 4411, Leaimgton KV 40504.

Greece

Marios Darkadakis SVItW Box 23051 Athens 11270 G eece Sorting with this column, I would like io present to you some of the SV hams oi whom you may have heard or even talked io oji tne bands As i htve already men tioned. DXing was something unknown a lew yc rs ago with the exception oi one or (aj peot.ie, but over he last four years mote and more new amateurs have joined a small team seriously involved with the HF bands Nowadays there are more than 15 SV amateurs who are active almost daily So,...

Guaranteed To Out Perform

Wl i Br -OfM good ro Dlrett Dr.itafi ,md OJirributort wilMn 1 cMyi ot purchai*r White others claim to be good, we guarantee our line of antennas to outperform any other of like size on the market All of our 2,4, 3 and 3.7 meter antennas are UPS shlppabte, Even our 4.9, 6.1, 7.3 and 9 meter antennas can be air shipped or taken as carry-on airline baggage. Our precision welding and use of the finest materials gives you an antenna that is lightweight and extremely durable. There are overs dozen...

Ham Help

I am looking for a manual and or a schematic for a Drake TR< 3. C. H. Camidge a C Roslin St South Waterloo, Oni. N2L 2G5 Canada I am looking for a schematic for a Halll-cfaftgrs Sky Buddy receiver. Any help would be greatly appreciated Tom Kennedy KflTK PO Bo 67 Clark Lake Ml 49234 1 need a schematic tor a model CA-isiO signal generator, n was mane by Munston Manufacturing, Lsllp NY, for civil aeronautics use. I will gladly pay copy costs. John Mock WA4LKW 2660 Gospiei Peace Rd Kopkinsville...

Helical Resonator Pre Am Ps

Our tab has developed a new line of tow-noise receiver preamps with helical resonator filters buift in. The combination of a low noise ampler and the sharp selectivity of a 3 or 4 section helical resonator provides increased sensitivity while reducing intermod and cross-band interference in criticai applications. See sefectivity curves at right Gain approx.12 dB. HRA-144 HRA-220 HRA-432 HRA-< ) HRA- )

Hi Ptlttf

Super RTTY fitter greatly improves copy under crowded, fading and weak signal conditions improves any RTTY receiving system 3 pole bandpass active filter for 170 Hz shift (2125 2295 Hz mark space), 200 or 400 Hz Dandwidths Automatic noise llmfter Audio in, speaker out jacks On off bypass switch M0N LED 12 VDC or 110 VAC with optional AC adapter, MFJ-1312. S9.95. 3x4x1 inch aluminum cabinet. or Commodore W. 4 *1*fa4M Inches. 12-15 VDC or 110 VAC with optional adapter, MFJ 1312. 9.95.

Hong Kong

P JL Weaw VS CT 10A Bonavenwre House 91 teighron fload Hong Kong Since I ne advent of the class Q (no-code) license in Hong Kongt wc now h v ov(ir 100 enthusiastic VHF operators A few are operating on si* meters and one, VS6XLA. is now on satellite. The HF licensees don't seem to change too muuh. as fast as new arrivals gel on the air, old ones leave By the very nature of Hong Kong we do ge< Quite a few expatriates who come for i wo or more years only HF llcen sees also number about 100....

Hurricane Tracking Chart

New expanded 6 * 24 format with, two plotting map* iind data on hurricanes covering the Atlantic, Gulf and Pacific coasts LIMITED QUANTITY Send io your copy before trw storms be n Please Send SELF ADDRESSED STAMPED ENVELOPE with 40C return postage to HURRICANE CHART P.O. BOX IQ1-WW To assiiiv j c op> join l he Bi Hi Ofc waior Weather Gull at sjft-i adrift Duis ooiySS-tiO rser y ar 73 does not keep subscription records on the premises, therefore calling us only adds time and doesn't solve the...

Hustler

ALL BAND HF PERFORMANCE HustfeTs new 6-BTV six-band iTap vertical fixed station antenna offers ail band operation with unmatched convenience, The 6-BTV offers 1Q, 15, 20, 30. AO, and 75 80 meter coverage with excellent bandwidth and low VSWR. Its durable heavy gauge afumlnum cons-u ction with fiberglass trap forms and stainless steel bardware ensures long reliability. Thirty meter kits (30-MTK) for 4-btv and 5-BTV are also available

Hustler Stiu The Standard Of Performance

3275 Nortti B Avenue Kissimmee, Florida 32741 RD 2, Cold Spring Creamery Rd. Ooytestown PA 73901 Throw away that antique breadboard and scope. Let your Apple II peak and tweak a soft circuit instead. Active audio filters are amazing devices They seem to be incredibly powerful yet wonderfully simple. 1 have marveled often at the way a handful of components can seemingly work magic on audio signals Best of all, they can be an easy home-brew project. Anyone who decides to design and build one of...

I

Use of this aid is necessary onfy when determining the tuners true settings. It is a backup check in forestalling any false indication of power transfer from rig to antenna. Therefore, this tuner can match a rig to most any aerial and maintain an swr of 1 1. Because this antenna-matching device tunes sharply, additional harmonic filtering is available, The sharp-tuning feature is also evident on receiving signals are peaked loudly and clearly For those having...

1

MOUNTING HOLES LISt *2U DRILL I as ' i 5C HFWS This rugged supply will give you more power than you ever dreamed possible. Have we gone too far this time Looking for a 12-volt power supply of moderate current, I found a schematic and information that promised to be just what i needed. The supply was constructed following the guidelines and recommendations upon completion, it was checked arid put into service. Then the run began. The supply was essentially the same as shown in Hg, 1 and was to...

A

Digital Readout, Scanning, Memories and ICOM introduces the new top-of the-line (C 02A and 1C-Q2AT to compliment its existing line of popular handheld transceivers and accessories The new direct entry microprocessor controlled fC-02Ais a full-featured 2-meter handheld Scanning. 10 memories, duple* offset storage in memory, odd offsets. 32 keyboard selectable PI tones which store in memory, and infernal lithium battery backup. Ksyboard entry through the 16 burton pad allows easv access of...

Dha

For all makts a. models of amateur transceivers i guar anteed for 000 watts sse input tor pretuneo - completely assembled-only one nlat small antenna for all bands excellent for con- do - apartments - light - strong -almost fn visible COMPLETE RG50U-S2 ohm fftdh r < nd PL259 c nnKtv. lntJl*1ort. 30 tt 30Q t till -tat> tntf iwpartl. c*nt r nnectv wflfl built Hi flhtiilflQ vrtif ind Itttk dkith* gt ' mslde , llalad, +remliierpreaf, r e ion nt T-'ip rXfi - jtw JiMl twftctt to band f* ciceH nl...

Jhx

Pnntout of the signal from the verv fast pulsar, 4C21SX as this was detected at the Arecibo observatory on November H 1982. This pulsar rotafes 642 times each second and transmits one of the larger and one of the smaller pulses during each rotation. The aluminum panels are perforated so that much of the sunlight can pass through. Vegetation can therefore grow under the reflecting dish, preventing erosion of the landscape. ceivers are mounted inside the carriages that suspend the secondary...

Vuy

We will, however, use the old-fashioned 7490 device here to illustrate a principle that would be lost in the maze of an MSI device Fig 4 shows a decimal counting unit (DCU) based on the 7490 and certain companion chips, the 7475 quad-latch, and 7447 R( D-tc seven-st'grnent decoder A DCU will count bv tens and produce a decimal output. In the case of Fig 4. the display device is the familiar seven-segment Lt D decimal display This form of display uses seven...

Icom

IC-R7IA, IC-751 At IC-745, IC-27 AJH, lC-37A IC*47A, 1C-271A H, IC-2KL, IC-471A, IC-290H CES Simple* Autopatch 510 SA Will Patcti FM TrsnscfMv r To Your Telephone Grcsl Fof Telephone Ca --. From modi if - To Ba f Simple rouse S319 95 DRAKE, EA TH SATELLITE STATION. ESS 2250, ESR-24. R-600, F-1000, R-2000, TS-930S AT, TS 430S. TR 2500 3500, TR-9130, TR 7950, TW4000A. VoCom Mirage Darwa Large inventory of I Tokyo Hy-Power Saxton Wire & Cable Amplifiers & _

Id

* for transe* A s jnc repi t's AMATEUfl hc COMMERCIAL * Vjion ,- ot* ration d u& T3E> le spwd tftd an Mum * Small SiJ easy msl Mtort - 7 to IS r Jfs DC * 8 selectatile reprogrammante messages e n.ri up la mm long - Wi ea tesied jnc proflurnrfled v ith yout messages) M riel III I S39.M Model ID- 1 w 2 10 10 minute Irmei Wi We olPt-i Compl t llfit ol T& nsmltlGT atid receiver slrips and synthes' ers ioi ainaLeuf and omrnerCJal w -pp esi Our free calal& g Aiton 2 tor UPS sntppw t Ma&...

Illinois State Arrl Convention

GOTH ANNIVERSARY HAMFEST Sponsored by Sunday - Augurt 26r 1984 Kane County Fairground* St. Charles, I L Commtrcial txhibits FUa Market * ARRL Bvoth Contests * De mons (ratio ns Hot Food Tickeis 2. Od in advanre 3.00 at gaff Scn SASi < . Frieders* W9ZGF. 1501 MolitorRoad Aurora, 1 60505 Dealers Comact G* ft, Isely. WO& GIG 736 FftHowi Street St. CharJes, IL 60174 AMATEUR AND COMMERCIAL COMMUNICA ION SERVICES * * Tec hnical assistance fry F.C.C. licensed technicians using the finest repair,...

Inc

140 Dog Branch Road Brasstown, NC 28902 704-837-9200 System Tested 4 5 x 6' board complete with all C and programmed EPROMs personalized for each purchaser Requires oniy single 8-10 volt Va amp power 1 year guarantee of hardware soft ware AX.25 standard RS232 serial ASCII at any user baud rate.RS232 HDLC for 202 modem used for AFSK or direct to RF equipment for FSK, 1977 to June 1960 > 3> 00ea July 1980 to present -. 3.50 ea USA AX.25 is the AMRAD approved digital format STANDARD used on...

Incorporated

TORRANCE, CA 90505 Wayne Amett A17C 3315 N Apollo Drive Chandler AZ 85224 This 101 control mod proves fun and easy with frequency. A remote vfo is useful for a lot more than just chasing DX You can search for a clear frequency (and sometimes find one without giving up the original, or stay with a net while moving off frequency to pick up side traffic and intercept QRM. fn a contest, you might leave the main vfo on a pileup and tune the re mote down the band for a few points....

Alb

Amp i er switching circuit for using two station amplifiers with a common antenna switching svstem Alleviates cable swapping when going from one amp to another Under-chassle iew of the amplifier. Left power-supply components and hiV-metcr multiplier resistors Center tube sock- ets, filament choke, and input pi-net mounted on a standoff. Center bottom ac power relay and 24-V-dc power supply. Right input loading capacitor, antenna relay, and safety rf choke. The metering can be modified...

Oxd

Justing the gain in the calculations to place the curve on the graph where it provides the maximum amount of information. In real life if you build a filter, you can select whatever gain you like and it will have the effect of moving the entire curve up or down the vertical axis. I he program is in two parts, an Applesoft program and a shapetable file. The Basic program is entered in the normal fashion with the exception of lines 500 through 550 which must be entered without any spaces in order...

Tkk

An ultra high quality encoder for absolute reliability and function. Positive touch key action with non-malfunction gold contacts, totally serviceable and self-contained. Easy level control, no frequency drift, operates in temperatures from -151 to 160 t Supplied with instructions, schematic, template and hardware. Call or write for free catalog, dealer s list and information guide. PP-1 557PP-1K, S.P.ST. Adj. Relay 62 P-3,12 or 16 Key,for custom PP-2, 597PP-2K S.P.ST. Adj. Relay 66....

Wpz

F g 5 n .n- ha RC ft was stamped or th wrong side by the tssuing USPS employee. use ot ihe IRC is n the & ov> ei-bioc coun tnes. DXers frequently hear lhal IRCs are not a ctpiEid in SoviqI countries, evan ihougti these countries are members of the Union, According lo the Universal Postal Un n a country may decline to seii iRCs buL a required to exchange them. However the UPU has iitile enforcement power, and I he Union has survived as long as it has by staying oat of politics So. many...

Jacksonville Fl

Sit ama eiir raaio clubs of l e greater Jacksonville area will sponsor the elevenlh annual Greater Jacksonville Hamfesl on Auqusi 4-5, 1984. at the Orange Park Kennel Club, US 17 South near I-295, Registration i > 54.00 swap tables Eire S9,QQ for one day ot 15.00 for the weekend. (All proceeds go to trie promotion of amaieur radio.) Saturday hours are B 00 am lo 5 00 pm and Sun day hours are am lo 3130 pm. Features will include a large area, forums and programs exhibilors. and plenty of free...

Khz

POTER OUTPUT 1.W 68K OHM 1Y2ATT BALLAST SPECTRA PHYSICS IMC, Model 088 HeNe LASER TUBES ROTRQN MUFFIN FANS Model MARK4 MU2A1 115 VAC 14WATTS 50 60CPS TMPEEtE JCE PROTBCTECKF 3.50 6.65 6,65 0.00 2.90 2.90 2.90 2,90 2.90 2,90 2 9Q 2.50 5.00 2.50 2.50 10,00 2,90 2.90 2,90 10.00 5.00 7,00

Kic

One turn of the shaft changes the frequency exactly 100 kHz. Take some time doing this, and you'll end up with an exceptionally accurate and linear readout. Occasionally the need may arise to monitor two frequencies at once. This usually means trying to impress a visitor with your station's versatility, but there are more legitimate uses. If you've always envied the guys who call CQ DX and casually add, Listening on this frequency and 7090 kHz ' then this extra step is for you. Fig, 3 shows one...

L

Fig 3fal Four-stage binary-counter circuit connected to a common clear line When this line drops LOW, the outputs of the counter go to 0000 . The inputs of C1 are connected to the B (i.e., Q2) and D (Life, Q4) flip-flop outputs If B and D go HIGH simultaneously, then the output of G1 goes LOW and all four flipflops will be reset. The only time thes< > conditions are met is at Trj see Fig i(b). Photo 8. Ihe Heathkit M-2400 hand-held frequency counter. Following T5r the counter is 0000J and...

Levelland Tx Augs

The Northwest Texas Emergency Nel and the Hockley Counly Amaieur Radio Ciub willl sponsor me i9lh annual North* w*sl Emergency Net Swapfesi and Picnic on Sunday August 5 19& * beginning ai d.QC am, in the City Pwb. Level land TX A S3 00 feg'stration fee requested tut not required. This is a ramlly event, so briny your own picnic basket. Tables will be provided for the all-day swapping. Talk-in on .261-& 8. For more inlormation. contact John R Bell W5NGX, 208 Pal Street. LeveHand TX 79336.

Li M

4 muffin fan. 115 V ac 14,20-21 .01 jiF, 1 kV disc 100 F. 450 Vdc 3330 pF silver mica (three 1000s and one 330 in parallel) .001 mF, 5 kV mica 1000 pF,2kV dc 2000 pFn 1 kV do (receiver-type spacing) .005 F, 2.5 kV dc 1000 fJFt 50 V dc .002 pF+ 5 kV mica block capacitors 115-V-ac pilot-lamp assembly 15 Amps 2 Amps Vz Amp DP ST or DPDT 25-Amp contacts 24-V-dc

Low Loss Foam Dielectric

RG8X 95 shield S14,95 iOO ft or 1 offt. RG59 U 70 copper RG& U 30 RG58U S0 shield . 07c 1t, RG50U 95 RG59U 100 foil stiierd. TV RG8U 97 shield 11 ga. (etiuiv. SeldenB2U) 3Wtt Heav Duty Rolor Caoie 2-i6 ga 6-20 ga. . . 36crtt. Rotor Cable S'COn 2-18 ga, 6-22 ga 19c f1. RGBU-20 it., PL-259 ea. end. S4.95 RG214U dDl si er shield, SOohm .S1.S& H. BELDEM Coax In 100 11. rolls RG60U 9201 S11.95 Grounding strap, heavy duty tubular braid 1 16 in. tinned copper i Qc tt. 3IB In. linned Copper 30t...

Magnum Distributors

1831 South Dixie Highway, Pompano Beach, Florida 33060 305-785-2002 Telex 514365 English FTL) Standing components on end lets everything fit on the 2 by 2.7 PC board. More real estate might be necessary if you build with perf or prototyping board. distortion is low because even this relatively minor gain reduction is applied gently as the diodes turn on. The distortion introduced by this type of gain control is mostly at the third harmonic of the oscillation frequency. An additional 5-dB...

Mail All Orders To Barry

CORP., 512 BROADWAY, NEW YORK CITY, NY 10012. LARGEST STOCKiN'.- & t i.'-F COMPLETE REPAIR LAB ON VISES BARRY INTERNATIONAL TELEX 12-7670 TOP TRADES GIVEN ON USED EQUIPMENT Monday-Friday 9 A.M. to 6 30 PM. Thursday to 8 P.Mr Saturday & Sunday 9 A.M. to 6 P.M. (Free parking) Paid parking lot across the street anytime AUTHORIZED DlSTS. MCKAY DYMEK FOR SHORTWAVE ANTENNAS & RFCElVERS lFmLEX- prlng St. Station Subways BMT Prince St Station'1 IN D-FM Train-Bwy. Station

Mb

C-740* 9-band 200* PEP xcvrw m< cS 109S 00 899 FREE PS-740 Internal Power Supply & PS 740 Internal power supply 159 00149 *EK-241 Marker unit 2 GQ *EK-242 fM *EX-243 Eiec roni tever unit 5000 *FL-4S 500 Hz CW liUer (1st IF 59 50 *fL-54 270 Hz CW filter (1st IF 47 50 FL-52A 500 Hi CW filter 2nd IF) 96 50 89 L 53A 250 Hz CW filter (2nd IF) 96 50 89 *FL-44A SSB filter (2nd IF) 159 00 144 HM-10 Scanning mobile microphone 39 5D HB-12 Mobtle mount 19 50 *Option> ji o for fC- 45 luted helo* IC...

Melbourne Fl

The Platinum Coas Amaleur Radio Soci-_v h I hold Lis I9lh annjjal nii-rri i and indoor1 swap indshoij Hea market on September 8-9. 1964, al the Melbourne Auditorium. Admission is S3.00 in advance arxi S4 00 at the door Swap tables re Si0.00, There will be lood and plenty of 1 ree parking availabfe. as well as awards k> rums. and meetings TalMn on 25 .B5 and 52f.52. For reservations, tableaf ar j more Information, writo PCARS F O Box 1004. Melbourne FL 32901. The CQ Radio Club wiP hold us...

Mfj Kw Roller Inductor Versa Tuner V

To OQ95 MmI HVf)ria Tuner VT It has all the features you aiketf for, including the new smaller size to match new smaller rigs I+S10) only 10 3 4W k 4 1 2'*H k14 7 8 O. Matches coax, balanced llnei. random wires - 1.8 to 30 MHz. 3 KW PEP-the power rating you won't outgrow (250 pf-6KV caps). Roller Inductor with a 3-digit turns counter plus a spinner knot) for precise Inductance control to get that SWR down to minimum every time. Built-in 300 watt, 50 ohm dummy load, built-in 4 1 ferrlte balun....

Mfj Watt Versa Tuner

AQf5 Handles up to 200 watts output, efllcient airwound inductor gives more wans out. (+W 5x2x6 in Use any Iranteetver, solid state or tube. Operate all bands with one antenna. OTHER 200 WATT MODELS MFJ-9C1, 59 95, (Ike 900 but includes 4 1 balun for use with balanced lines. MFJ-1S010, S39.96. for ranaom wires only. Great tor apartment, motel, camping fl operation. Tunes 1 > 30 MHz. to 1.5 7 KW PEP (+S10) and match any teedllne continuously from 1.8 to 30...

Mfjd Watt Versa Tuner Ii

TOO95 MFJt tun*r ln P flnt new faaturos. r Hew ttyllng Brushed aluminum front. Ail metal cabinet (+S4j New SWR Wattmeter J More accurate. Switch selectable 300 30 wait ranges. Read forward reflected power. New antenna jwltcfi Front pane mounted Select 2 coax lines, direct or through tuner, random wire balanced line or tuner bypass tor dummy load New alrwound Inductor Larger more efficient 12 position airwound inductor gives lower losses and more watt* out. Run up to 300 watts RF power output...

N

RF Connectors P L259 10 4.95 M358 2.50 ea. Type N Twist on (RG8 U) 4.75 ea. COMMUNICATIONS, Inc. __2115 Avenu X Brooklyn, NY 11235 SERStNG THE INDUSTRY SINCE 7922 Phone (212) 646-6300 Call CECO for Your CC TV Security An tf Cofor Production Requirements don to generate a strobe puSse, This pulse tells the DCU latches to transfer data from the counter to the decoders. The display, then, shows only completed count cycles and wilt hold the previous count until the end of the next interval (The...

New Lownoise Preamps Receiving Converters Transmit Converters

AA Hamtronics Breaks the Price Barrier No Need to Pay 80 to S125 fora GaAs FET Preaitip. Very LOW Noise 0.7 dB VHFh O.fl dB UHF High Gain 18 to 28 dB. Depending on Freq, Wide Dynamtc Range for Overload Resistance Latest Dua3-gate GaAs FET. StaWe Over Wide Range of Conditions Rugged, Diode*protecled Transistors Operates on Standard 12 to 14 Vdc Supply

Newsletter Of The Month

Tr ihe aur ls go ic i or AI Bern WB7SIC and OTVABC j ma of the Oregon Tualatin Valley ARC. A1 tries very hard to include items of interest lor everyone - a tough job In a club with 230 + members The result is a collection of news and views presented in a Irrendly. easygoing styFe with eye-catching graph ., that grab a Trader's attention OTVABC. 's obviously a dynamic group of people who thrive one steady diet of ham radio social events, and public service Congratulations to Presideni Dave Pail...

Ni

Lockhart, TX 78644 orman . Sternberg W2fUP 279 Adirondaci. Dr e f armtngville NY 11738 FEC ARQ Don X panic. Timely advice from the father of AMTOR takes the confusion out of our newest mode. The following text is from 3 letter to W2IUP from Peter Martinez CiPLX, dated 9 24 83, on the subject of AMTOR operating practices, This information is reproduced by express permission of the author and is offered as a guide to AMTOR operating rules, as suggested by the one man most...

Nippon Electric Company Tunnel Diodes

Current ma. Peak Pt. Voltage mv. Projected Peak Pt. Voltage mv. Series Res. Ohms Terminal Cap. pf. Valley Pt. Voltage mv. MODEL 1S2199 9inin. lOTyp. Umax. 1.2Typ. l.Srnax. 95Typ. 120max. 480min. 550Typ. 630max. 2.5Typ. 4max. 1.7Typ, 2max. 370Typ. 1S2200 7-50 9min. lOTyp. llmax. 1.2Typ. 1.5max. 75Typ. 90max. 440min. 520Typ. 600max 2Typ. 3max. 5Typ. 8max. 350Typ. FAIRCH1LD DUMONT Oscilloscope Probes Model 4290B Input Impedance 10 meg., Input Capacity 6.5 to 12pf.,...

Nov

Fi priVE RPQ10FI JE T > E O -'il Fi priVE RPQ10FI JE T > E O -'il Radar echoes from the nucleus of the comer ncAe w ere detected by the Arecibo observatory in No ember, 1980. This is the first detection of the nucleus of a comet. The strength or the received echo indicates that the nucleus has a diameter of about 2 miies. The rotation and speed of the nucleus c an be determined from the Doppler shifts in the echo observatory for at least 30 more years, The Arecibo observatory, which was...

Nvkagxo

OK KJ9R PA W3ZX TX W5PWG WA-W7DBA WV -W3IJT WV-NC70 DX winners Canada- VE3KK Spain EA2IA ators iisteJ. Logs and cammenls should be seni to Engle .-.ood Amateur Rad Assoc at on. Bo* 526. Englewood NJ 07631 A t0 business) 3iie SASE should be included for resuhs Siations planning ac-live participation in NJ are lequested to ad visa ihe EARA by Augus 1st or their ln- f> ntion-s sq thai they can plan lor lull coverage from all Counties Portable and mo-Diie operaiion is encouraged SARTG WORLDWIDE...

O

C an be set up easily to function either normally or as a remote vfo. for example, an 5B-3G3 receiver's LMO can be used exactly as shown in Fig. 2. Mount the control switch in a separate box or in place ot an expendable receiver control such as the rt attenuator i MO output is available on the rear panel. If operating voltage is brought to the LMO through spare phono sockets, the receiver itself need not even be turned on In the same way, an SB-110 six-meter transceiver could loan our its LMO...

Olympic Triumph

When ihe US Olympic Committee selected Olympia, Washington, to be the sllfj of ihe US Olympic Women's Marathon Trials on May l2thN 1984, the local amateur radio club, the Qiympia Amateur Radio Society (OAHSK created a committee to Interface with Ihe task force running me marathon As chairman of this committee. I found this assignment quite difficult iw several reasons Our job was to teach the maraihon task force bout amateur radios utility in mis kind of endeavor. find out wftai Ihey would...

Out

Yaesu microphone connector pin layout switch is closed during transmitting, whereas my circuit applies power during receiving as well. This introduces an extra battery load of slightly over 1 milliampere, I decided that this was not important and let it go But if you feel strongK enough about it, there is a way out. The PTT swiU h in the switch box is a DPDT switch, with the two sections paralleled. By disconnecting one section of the switch and placing it in series with the new 4.7k...