Sep

The Ctearks Amateur Radio Society will nolo the 2nd annual Orarks Amateur Radio Club Congress & S'Aapfest on Sunday, September 11.19S3, beginning at iiftOam, at (he Monett City Park, junction of highways LIS 60 and MO 37. Monett MO laoout 0 miles southwest of Spnngfie'd MOf. There is no admission charge and no charge lor swappers and tailgate traders iall space available on a firsi-come, llrat- served basisj The picnic and social hou begin at 1 00 pm. Bring a single coverec dish to the...

Desjgn Director

Difue+ Oyw Mit hWi Fwd Marion* Gill'it Pfiil Gfltaci Donna HitftwiHt TaylQt Morris JKimbtfEy Nadeiui Paula Harnscy anni- ftocohifl Kennel It Sutturte Tnerna Roosri M VINerttuve Dawid Wo*mih K& ren Wotmak PWOTOCflAPHV T -.orrpJt Vhlleatuv* Sandra Dukelle Lauue Jenmion Sfuroy Tnoi ai Vttt Laurel asctmsnri f err. Kni*vm ti& naapu Lynn D btm< Nut ling Ltntly Pjilimsanrj Hn> .ui Thomas Knud Kf*l fi PViG& l CrUCULATlON MANAGER P mer* f err an i e 60 M4

Yaj

Let us know 8 weeks in advance so that you won't miss a single issue of 73. Attach old label where indicated and print new address in space pro ided. Also include your mailing label whenever you write concerning your subscription. II helps us serve you promptly. Write to Subscription Department Amateur Radios P.O. Box 931 Technical Journal Farmmgdale NY 11737 Intend my subscription one additional yfcar for only SIS.97 Payment enclosed i Biif me Canada jnd Mexico S22.'> 7, US funds, Foreign...

Hbt

Rotors Thrust Btynrtngs - Swiss Guads VHP UHF Disc on - H F Verticals - Etc' CASH CHECH M.G VISA - MASTERCARD PLEA0P INCLUDE UPS SHIPPING TO ORDER. OR F OR COMPLE rE CA TAi OG CALL OR WftiTF The modern multi-band mobile antenna switch to 10, 15, 20 or 40 meters without slopping to change resonatorsFeatures of the Spider Antenna * The Spider Antenna is less than si* feet high and the longest resonator projects out from the mast 24 inches. This gives a slim profile low height and light weight,...

Laramie Wy

Thfourth annual H*gh Plains Ham Roundup will be held on September 9-10, 19& 3, at Yullow Pine and Pole Creek Campgrounds, Medicine Bow National Forest. 10 mlJes easi oi Laramie, Inter state Highway 90. Lincoln Monument lurnoM. The campgrounds have been reserved tor hams and their l.imilies Bring your own iood and drink and stay as long as you wish Roast beef will he furnished for the potiuck supper on Saturday eve nmg There a III be a biuegrass band, a barbershop quartet and a smgaionc...

Rx

Lxamples oi same-side splits Ut) and straddle splits (b). J he amateur band is shown h the heavy line. When modifying the PCS-2000 lor CAP MARS operation via repeaters, same-side splits and straddle splits require somewhat different circuits, as discussed in the text of the Offset Scan switch will provide simplex operation. Positions Band F allow repeater operation when the proper offset crystal has been installed. (The display will not follow crvstal-con-trolled offsets.) To obtain...

Triokenwood Communications

California 90220 David L Oliver W9 DK Rte, 2t Box 75A Shevlin MN > 6676 Construct This Customized Power Supply Whether you want 5 Amps or 30> , this supply can give it to you. With more and more equipment on the market requiring a separate source of 12 V dc, almost every ham shack needs a power suppl> capable of operating such equipment on 115 V ac. Even if your 12-volt transceiver IS normally mobile, you might want to bring it into the house for testing or as a...

With Data Sheet

NE57835 2SC2150 Microwave Transistor Ft Gain Bandwidth Product at Vce 8v, Ic 10ma. GHz 4 Min. 6 Typ. Vcbo 25v Vceo llv Vebo 3v Ic 50ma. Pt. 250mw UNEXjCO RF Power and Linear Amplifier Capacitors These are the famous capacitors used by all the RF Power and Linear Amplifier manufacturers, and described in the RF Data Book, 200pf 1 to 220pf 11 to 470pf 51 up 500of lOOOpf

Call For Papers

Paare invited for the 1983 VHF Conference sponsored by Ihe Eiect.ncai Engineering Depart me n t of W est em Michigan Un versily > n Kalamazoo The prin-pa as * e seed on er-C' neermg developments aopiied to radio . omr n-cation. design, and construction > n me freduenctes o' 3C to 1200 MHz. One of me oasic purposes of this conference '5 to provide a maximum opportune io present tindtngs by those ex-ptiiiment ng. designrng constructing, lesling and inquiring into problems anc rnomods...

The Heard Island Story

DXers have enjoyed not one but two success ui DXpeomons io tiny, frozen Heard Island m ihe southern Indian Ocean. The Heard Island Expedition won ihe Tace to Heard (sor this column, Januaiy. T9B3i wilh VKtiFS first in the VK0GW logbook on January 22 Jim SmthVs 1 Heard island DX Association group a Jived soon thereafter, and lor a feu. days. DXers worldwide had a choice of Heart) Island stations to call. Despite poor Dana conations, by ihe lime Dad weather forced the two groups oM...

Scp High Current A Power Supply

The SCP30 is the companion supply for the SCA100 Amp., but t may be used for any application requiring an extremely heavy duty 25-30A cont duty supply. AC Input 115 23QVAC nom. (100-130V on 115V tap.) DC Output 13.8V nom. Max Output Current 25A (100 ConL) 30A (Int.) Metering Output Voltage & Current 19 Rack Mount. 7 H. 25 lbs. Massive Feno-resonant Transformer combined with a unique low dissipation regulator provides excellent regulation and ripple rejection without the usual high heat...

Morse Code Message Generator

Up to 6 separate user definable messages Completely non-volatile memory * Will not forget your messages when power is shut oft * Supports manual, continuous automate, and tirrad automatic modes User electable transmission rale * individual messages, or groups of messages may e transmitted * Can be wirea as a beacor controller, automatically repealing any selected messages Can oe wired as a repeater remote base ID commuer a Automatic 'epeat of any selected message ) at selectable mjervats b...

Repeater Control

Complete repeater control incorporating ID, tail and timeout timers, audio generator local control and PL enable Perfect as main controller of as backup for your presenl system * Master enable input lor non-override local control Switchable PL input for access security IU on start-up can be selected Non volatile 10 memory * Selec-lable timeout length Automatically powers up and runs ideal for emote applications * Selectable ID transmission rate Adjustable tail timer length Force ID inputtor...

Communications Specialists

426 West Taft Avenue, Orange, California 92667 (800)854-0547 Califomia (714) 998-3021 Each month, 73 brings you amateur radio news from around the world, in this collection of reports from our foreign correspondents, we present the latest news in OX, contests and eventst as well as keep you abreast of the technical achievements of hams in other countries, tf you would like to contribute to your country's column, write to your country's correspondent or to 73 Amateur Radio's Technical Journal...

The Answers

Ham makers turn to CB 1983 nam makers i urn to computers. 1090 Automobile makers turn to ham radio 2 3 The yeaf wu > 1952 and the mode was AM Co ld the iirst jammer be far Lee DeForest s revolution in efecuomcs the audion was the first node 4 3 The HT- 20 is Motorola's popular VHF hand held transceiver 5 1 More tnari one Novjoe s first ng 1 J,2-B, 3-a 4-F. 5 H, 6-M, 7-U, S K. 9-E, 10-K. 11 T. 12-C. 13-Dr 14-G, R 17-* 16 O. 19-St 20-L 1 H, 2 O, 3 F, 4 B, 5 U, 6 0, 7 K, 8 A, 9 T, 10...

1

Sand check or money order to P,0. Box 8817. Coral Gables. Florida 33124 CALL (305) 823-5091 for COD orders PLEASE WRfTE FOR OUR FREE CATALOG SHIPPIM0-. Orders unaer SW add 10-'. Orders over 50 add M. FL residents +5 Tax. tact *iin a v-hile Tbj De r Award cir-titicale holoef F list ri r . tne raqolfements ar ont- MMtARC heaitJ Qt one vViiite Tail Deer Awafd c t tilicate holder. A deiaiied list showing name can. and OT h of the station or stations worked or i i ard should be...

Output

Cl fl. ti see table i ai-qr 2Ni055 5, rt OHM I TE 45FFN5 QR i.5f I. < 4 5 cm,) JO COPPER wire ALL RESJSTORS IN OHMS, UNLESS OTHERWISE SPECIFIED fig, 13-V-dc power supply schematic. to about 13 V at full load. This is much tighter regulation than an automotive electrical system where variations of 11 to 16 V are possible All amateur equipment which requires a nominal 12 V is designed to operate over this range with 13 to 14 V being optimum. Line regulation is essentially perfect with no...

Packet Radio

USA AX.25 is AMRAD ARRL approved digital format STANDARD used on amateur packet radio networks Assernbfed Tesled NolQs.90day warranty Package of all fCs except 2-2716 EPROMs 80.00 System Tested 4.5 x 6HH board complete vj th all ICs and programmed EPROMs personalized for eacti purchaser Requires only single 8-10 volt Vi amp power, 1 year guarantee of hardware soft-ware AX.25 standard RS232 serial ASCII at any user baud rateRS232 HDLC for 202 modem used for AFSK or direct to RF equipment for...

Ferrite Beads

SmwC'F ts fioa timilipup -r ij 11 oq si j i-fi n-'s j r vti fl fMPK fIT G*P 4.-I1 A tr Cut reai lor PCmouritinti center rr.pff. iHJUJS -i ofi-h- (jo- i ' CJP iit ii lone ipeafcen iiurm ciock wtc Vf 1 O* H 30 n t - te 3 'or t 00 m r f'r Hi M a EI tauffd ' 12 di ni )0 M n-.A T TL 4 11 H Sirr 3 16 HP* ugs turneo cc 3lum5 0 for St 00

Sjo

All antennas aTitcomp ie wa hi-q Basun oj hi G Antenna Centtif msulaior No.14 antenna wire cef-arrnc insuialor 100 nylon antenna support rope fSD modtils only 50) rated lor lull legal power Antennas may be used as an Inverted V and may also be used by MAR5 or SWL. Antenna accessories available wilh antenna orders Nylon guy rapi' lesl 100 feel 14.49 Ceramic iDogbone Type antenna insulators S1.50 pr SO239 coax connectors .55 To order, send check or money order to DEPARTMENT K

Notch

DX-traordinary , superior dynamic range, auto, antenna tuner, QSK, dual NBt 2 VFO's, general coverage receiver A superlative high performance, all solid-state HF transceiver, that covers all Amateur HF bands, and incorporates a 150 kHz to 30 MHz general coverage receiver having an cicelleM dynamic range. * 160-10 Meters, with 150 kHz 30 MHz general coverage receiver. Covers all Amateur frequencies. * plus WARC. oil SSB, CW, FSK. and AM. UP conversion digital * PLL circuit * Excellent receiver...

Xzk

Once the hardware is connected and the program loaded, start the sequence at 2F00, but wait until the camera vertical sweep is at the top. In my case, I address 2F00 and watch the SSTV monitor, punching CO on the KIM-1 keypad as the vertical sweep begins a fresh sweep After about 8 seconds have elapsed , the printer will print CRLF several times and then begin printing line after line ot the picture At the conclusion, the computer reloads the starting address of the program and jumps to the KIM...

Ci

SIMPLE FM TRANSMITTER This transmitter can be tuned to the FM broadcast band. 2 meters. or other VHP bands by changing C5 and L1 The values given for C5 and Li will piece the frequency somewhere in the FM broadcast band Li is 4 turns of *20 enameled wire airwoundr - inch in diameter, 5mm long, and center tapped. The microphone is an electret type and the antenna is 18 mches of any type of wire. Keep alt.eads as short as possible to minimize stray capacitance. The range of the transmitter is...

Dealer Inquiries Invited

2115 AVENUE X BROOKLYN, N.Y. 11235 (212) 646-6300 ( O ) 221-0 60 TELEX 235125 Whether you re a repeater owner, control op or user the RC 850 controller offers you capabilities you ve only dreamed of. Like natural sounding speech synthesis . easy, remote Touch Tone programming talking meter readback . synthesized remote base operation and an autopatch with features you have to hear to believe. We re changing what repeaters can do for YOU RC-850 Repeater Controller The New Standard in High...

Info

Here they are The latest editions of the world-famous Radio Amateur Catlbook are available now. The U.S. edition features over 400,000 listings, with over 75,000 changes from last year. The Foreign edition has over 370,000 listings, over 50,000 changes. Each book lists calls and the address Information you need to send QSL'S. Special features include can changes, census of amateur licenses, world-wide QSL bureaus, prefixes of the world. International postal rates, and much more. Place you order...

Plus

*RTTY 1with over 30,000 hams owning microcomputers, RTTY is developing a whole new life. 73 gives you more ar-jcles on Kl 'H' than all the other magazines combined. Ham Help puts you in touch with other readers to get lard-to-find parts, schematics, and owner's manuals. Contests rules and results keep you informed about ham adio s competitive side. iubscribe to 73 todayl Well keep you involved, informed, ind completely entertained. To order, simply semi in the at- ached order form, the coupon,...

Contl U S

* jwov-sse -1 se kh 30 ihj . fM eno.xocAsr 0U S> 'HE5 ED AIT- SCANN f JG -NC VE VC- * AC OARTUH i -iiZTCC- Put Your Computer On-Ttie*Alr The Interface Your personal computer become a compile CVWRTTYfASCH send and receive terminal wllh Th* Interface Unking II your transceiver. If you own an Apple II or Apple II Plus. Atari 400 or 300, TRS-80 Color Computer, or VIC-20, Thm IrtUrf act will put your computer On-The-Air. Software for eacFi system ioaturea split acrtrtn display. buttered keyboard,...

S

Rugged, lightweight injection molded oi lop ouiity material, with' high dialer 1 nc qualithes and excellent weatherabiMy End insula-sors are constrifcted a spiral unending lashlon to permit winding ol loading coits cr partial Aminng tar lunecf rap-M it t - f* t. - . ifi in f-, Enp of ronii < nsutarors kv CansirucTHX oi anccnna maa CansirucTHX oi anccnna maa

Wired

The CT-90 is the most versatile, feature packed counter available for less ihid S300.00 Advanced design features include thrrc detectable gate times, nine dig l-s. pale indicator and i unique display hold function which hold the display cd count itfte r the in pu* s ign a 1I s removed A Is a 10 m H i TC XQ lime base is used which enables easy lem beat calibration checks against WW V. Optionally, an in icrna I n i cad bait cry pac L,extemal time base in put and Micro power high lability crystal...

IJ

Output under ideal conditions. Fig. i. Output under severely degraded conditions Fig 2. Output under ideal conditions. Fig. i. Output under severely degraded conditions 8-bit number is uniquely assigned by the transmitting station to each block to identify it The ret eiving station then acknowledges receipt of a block by sending its address, Those blocks that are not acknowledged (their addresses are not received back at (he transmitting station) are then retransmitted This feature...

Ups Shippable

RV fiia be the perfect antenna for condominiums, ipartmcnts Mnall Int- or *m limited spaiv si tua tum. i rL-at antirnn fer ham who arc concerned about neat appearance arid maximum performance. RVs sell supporting radiator is onK 2 i ft-6.4in high ft KM m v ide at tlu- base. Assembly is quick and eas for portable, marine,field day, DX-pcditions, or fixed installations. It Is complete with remote tuner, AVAILAIH I THROUGH IM t 1RS WORI DWIDh

Uniontown Pa

The Unioniown Amateur Radio Out W3PIE ol Uiiioni 'An, Pennsylvania, will be operating 1 puclal event station on September 24, '9H3 to celebrate Fayeite County's 200th anniversary Operatiom-will be conducted irom i300Zto 2100Z. or about the Uequenoes of 7.235. 14.2& 5 ano 21.360 on SSB also 14652 simple* beiween 2300Z and QiOCZ for local con tacts. An 8 x 10certificate will be issued tor contacts made du'lng these 'imes Please send a lanje SASE ano QSL tc W3PIE, c o J rn T Cermak WB300D PC...

For The Contester

THE CONTEST C00K900K-Th,s book reveals ne stcff rs of trial elite group of oc-eratots no 'Op the lis when i he contest results are publsneo It contains detailed suggestions (Of the firss time contesier is as tips for the advanced operator. Domestic, DX, and specialty contests are ail discussed, complete with photographs and diagrams showing the equipment and operating aids used by Ihe top scorers For ihe serious contester. BK73Q8 5.95. WORLD WIDE RAOIO TELETYPE STATIONS IN FREQUENCY ORDER fllh...

Now Display It Proudly

IN A TOP QUALITY LACOSTE-TYPE KNIT SHIRT. ONLY 14.00 With your call tn rich embroidery, 1,50 extra for first name. Choose from 10 great colors rust, cream, brown, green, yellow, navy, It. blue, aqua, white, and black. Adult sizes only & M-L-XL Club and dealer inquiries invited. Please add 2.00 for P H. Make check or money order payable to Coin Int'l inc. 2305 N.W. 107 Ave. Miami, FL 33172 13 AHov- 4 weeks tor delivery F. r dents add sales tax

The Well Equipped Ham Shack

THE SELECTRiC INTERFACE-by George Young. You need the quality print that a daisy wheel printer provides but the thought of buying one makes your wallet wilt. selectpictm INTERFACE a step-by-step guide to interfacing an IBM Seflectric I O Writer o your microcomputer, will give you that quality at & 1r act ion ofthn price. George Young, co-author of Kilobaud Microcomputing magazine's popular Kilobaud Klassroom series, offers a low-cosl alternative to buying a daisy wheel printer. SELECTRIC...

Write For Complete Catalog Or Call Collect For The Most Competitive Prices

Ganwville, Hew York 10923 Outstanding OX performance of slopers is well Known Now yon ran en-fOy 2 or 3 biind aiG-SIGNAL reportsl Automatic biindswiichmcj * Very low SWR TCoax feed - 2kw power Compact * Ground or I0wt.-f feed - Hang rcom any support IS tt hLgh or higher , Easy lo install - Very low oroiile Complete inslruel ons - immediate sh omeni - Check ot 3 BAND SLQPEH 160 SO & AO Meters 60 < 1 long S 43 23 frl ppd 2 BAND SLOFER 60 & 4QMeters 41 ft...

MFJ

See L tst ot A tfirwrtittts on page 11 * ning c1 band segments up to the entire band Band segments are determined by the frequencies stored n memories 1 and 2 Memory i would be ihe lowest frequency of ihe segment and memory 2 would bin the highest The IC QOA also Includes a priority channel feature to let you keep track of a fa jff i.' frequency or calling frequency while operating on -mother frequency Tug priority frequency can be any memory channel The microprocessor selects the pno ty...

M

10W in 80W out 15W, 2W-30W) RH preamp 10W in 160W oiit 279.95 (iW 35W, 2W 90W) B3016 30W in 160W put 239.95 (useable in 15-45W) RX preamp (10W 100W) C106 WJ in 60W out 199.95 (1W-13W, 2W 30W) RX preamp CIO 12 10W in - 120W out S& 89.95 (2W 45W, 5W 90W) RX prtemp RC-1 AMPLIFIER REMOTE CONTROL 4.95 Duplicates all switches. 18' cabl direct SWR reading MP-1 ffilF) 1.8-30 MHz MP-2 (VHF) 50-200 MHz D1010 10W in 100W out (1W 25W. 2W 50W) 319 95 Available at local dealers throughout the world.

Acd

COMPUTER PROGRAMS FOR TEX.INST.99 4-4A TAPE OR DISK CW RECEIVE TRANSMIT CW PRACTICE(SENDING) CW PRACTICE(RECEIVING) CW FOR YOUNGSTERS W A.S. fit 6 BAND W.A.S. DXCC & 6 BAND DXCC 1010 NUMBER SEARCH AMATEUR CALL LOCATOR SSTV KEYBOARD DISPLAY BARNYARD MATH FOR KIDS WRITE SAM H. MOORE, SR.6 P. 0. BOX 368 STIGLER, OKLA. 74462 The 1 k Memory Cerxrrcige fH designed use with cr-- V1C-20 This simple, law i ost unit plugs inia the tnp< .ins On port of the VFC CO increase the r-nernory to a total of...

Srt

* Built-in demodulator & AFSK modulator for 170,425,850 Hz shifts, high and low tone pairs * 60.66.75.100,132 WPM Baudot, 110,300 Baud ASCII, 5-99 WPM Morse * 1000 character Eext buffer with BREAK feature Ten 80 character message memories with battery backup * Selectable display formats. 24 lines x 72 characters (2 pages), 24 lines x 36 characters 4 pages), 16 lines x 36 characters (6 pages) Split screen operation * On screen status ime dtspfays a luning bar, mode, speed, shift, tone pairT...

Solid Static Relays

Pifl Model ECT1DB72 PRICE EACH 5.00 Digisig, Inc . Htxi& l ECS-2 I S PRICE EACH 7.5Q Grigsfay Barton Model GB7 00 PRICE EACH 37 50 120vac contact at 7amps or 20a ups on a 10x 10x .124 aluminum* Heatsink with silicon grease- 240vac contact 14amps or *Oai5ps on a I0rx 10* ,124 aluminum. BeatsinJt with silicon grease, contact a1 Stamps or Damps on a 10 ICTx . 124 aluminum. Heatsink with silicon grease. NOTE *** Items may he substituted with other brands or equivalent model numbers, *** hAII...

Standard Features

Compatible with either rotary or ione exchanges 16 Digit buffer memory dial as fast as you want 3201 tone decoder chip * High quality glass circuit board Compatible with either rotary or ione exchanges 16 Digit buffer memory dial as fast as you want 3201 tone decoder chip * High quality glass circuit board Five digit user programmable sequential access code 60,000 code combinations Sophisticated toll restrict restricts any quantity of leading digits Both accessing and dialing are compatible...

Elmer Award

Named m tionor of all Ihe Elmers whov since Marconi, have given or their tiTTf- and talentf- to nelp others bi> comt amateur radto operators, the Northern Nev, Jer'.HVy Chapter -J QCtVA h.is eslat Iisheet its Elmer Award The award wnit recognize s Etmer-of-the Year ih radio amateur m northern New Jersey who has done itie most to pass on ihe knowledge lhat he or she has gained over the years lo ihe next generation ot amaieur riuiio operators The awaid will consist ol two dpproprialely...

Direction

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 tour omnidirectional antennas. Low noise, high gain for weak signal detection, Use serial AFSK option for remote display or tape recording data. Kits from 270. Assembled units and antennas also available. Call or write for full details and prices. DOPPLER SYSTEMS 5540 E, Charter Oak ScottsdaJe, A2 85254

Boulder Co

The Boulder Amateur Radio Club wrl hold its fall swapfesi Barcfest on Sef> tifmbe 25, 19B3 from 9 00 am (o 3 00 pm ir the National Guard 'morv 750 N Broadway. Boulder CO Admission if S3,00 per individual ot per family, Then will be an indoor and outdoor fii*a market a snack bar, and free parking Talk-in or T46 10 70 a d MB 52 slmpte* Fof mc-information, phone Tim Groat KtfflU ai 303i-466-3733. or write 1000 East i0ir Avenue, Broomfield CO 80020. I need service manuals for ihi HQ 129X and...

Sc

TfECtfVEF SIGNAL STflENCTH, mV U> Ftg. 6 So ar f ux number vs. signa strength. Earth This data is collected daily and transmitted hourly by WWV. Although a very weak positive correlation was shown to exist here, this correlation was not found to be statistically significant. In fact, the correlation is so weak as to indicate that the relationship between the two possibly might be caused by strictly random events. Again, it should be remembered that the lack of a significant relationship here...

Lsoo

5 CiRT 2FOO PBDD31703 J I rtE i M 704 CWLF ie r i. LEAi MEriRY 2Foo SET PERT 2F2B UA1 TA AIN-2F EYtJC ULSE 2FEl L ADP1J L*2FBP END. 3tOO t PAGE r> 00Q fPfiD. 1702 TIflEZ-t705 'PRINTCHAP 1EA0 ENC.V 2F0E EE TP 5 XEL 2f30 E EG IN P I > 2 FS E 1 N TONE. 2F9E S T DP 2FC0 L E T T E RS 3 00 0 PAD. 1700 t TI MEDLrT i 707 L1NECQ N1 'GOOS SETADDR 2F tf kftlT ZF3E HAIlr4EYNC ZF7 PINEL.-2FA CHftftTABLE-SOQO

Robot

1200C SSTV 1139,00 800C 800CH 789.00 400C Conversion Kit 469.00 800C Conversion Kit 155.00 GMT LocaL (urn d'tpfay tjjac*< fiftmi liege easy-io-'ead J'SpiA i t n,.jh, Si s-f.ei m iuC ii 29 95 St 50 jhipp.rug AEA CPl, Kanironics Interface, VIC 20 Hamsoftandcomputerwith cables to fit your VIC 20 radio 325,00 MFJ 1224, Kantronics Hamsoft, VfC 20 and the cables for your radio, 225.00 GMT LocaL (urn d'tpfay tjjac*< fiftmi liege easy-io-'ead J'SpiA i t n,.jh, Si s-f.ei m iuC ii 29 95 St 50...

S S

Digital Microsystems SATOM Chip Digital Microsystems PATOM Chip Advanced adaptive algorithm converts mos hand sent and machine sent Morse code to ASCII 110 and 300 baud * Automatic line feed insertion selectable by user Automatic carriage return insertion selectable by user * Selectable number of characters per line before insertion of carriage return or line teed (if selected) * Master enable input for compatibility with ASCil to Morse convertes chip SATOM) * Two separate ASCI outputs lor easy...

Cd

A particular made are scanned others are bypassed Data may be transferred between VFO's. from VFO fa memories, or from memories to VFO above features plus FM unit high shape factor FL44A. 455 Khz SS8 filter, full function metering. SS6 and FM squelch, convenient large controls, FM option, a large selection of plug-in filters, and a new high visibility mulii-CClor ffourescent display that shows frequency in white, and other functions in white Of red, make tfie SC- 75' your best chace for a...

Mfj S Vhf Converter

Triple Ihe usefulness of your 2-meter handie I alkie with ihlsnew MFJ-Ht police-, fi re-t and weather- ba n< j c onverte r The corn pact VHF converter mounts c-elrveen your handie-tafk e and rubber ducwy antenna ar> d turns any synttested ng tnto a p bhe-servtcn biind tecervei The co* .iMler also win givt you direct frequency r adout anc allow simultaneous, scanning of both 2 me lersanri police bands A high-pass fiftpui til ter and a 1.0-GHz transistor give you very high uniform sensitivity...

Northwest Corner Of The World

Tne Wisconsin Vaiiev Radio Assoc.* lion, of Wausau Marathon County Wisconsin, ii pieasf-o to announce Ihe following special-event station ihe second annual ft The World Is Round, Then How Come it Hus Corners Marathon County Wisconsin. Is locat ed In north cohlinii Wisconsin, Besides be Ing the largest county In Wisconsin (somewhai larger th,iu the stale of Rhode IsisndJ. t also cunt ins the intersection of the 45 ncrtn parallel art the 90* *est meridian Th,3 pomi ccjr eaf the cits ol Wausau....

Bs

Wayne Green Books announces a September 1, 1983 deadline for submitting manuscript proposals for the upcoming publication list. Ideas for book-length manuscripts about any microcomputer system or area of electronics will be considered, In addition to payment and royalties, we offer our distribution channels and the marketing support your book deserves. Send proposals or requests for a copy of our Writer1 s Guide to Editor, Wayne Green Books Peterborough, NH 03458.

Siara

A new organization is being forrred or rather, an old organization is being reactivated. in Korea it < 3 the Seoul Interna tional Amateur Radio Association. SIARA was formed originany in i973asa way for hams of various nationalities to get together socially, Later, a club of HL9 operators (US militaryycivKUmsi was formed a nd more or less took the place of SIARA Now, in 1903, SIARA is being reorganized with the sole purpose of pro motint reciprocal operating eeme Det een Korea anl nations oi...

Aa

Fig 4, IS-tV supply for image converter tube, Listings in thts column arv provided tree of charge on a space available basis The foi footing information should be included m every announcement sponsor ve r, date, lime, place, city, stale, admission cnarge (it anyi feature lalHtn frequencies, and the name ot whom to contact for further informs-tton Announcements most be received by 7 Magazine by the first of the month, two months prior to the month in whicn tne event lakes puce. ton it to...

Dealers

Your company name and message can contain up to 25 words for as little rti SI50 yearly (prejmid), or per month (prepaid quarterly). No mention of mail-order business or area code permitted. Directory text and payment mttst reach us 60 days in advance of publication For example. advertising for the Oct. S3 unite must be in our harwk by Aug, 1st. Mail to 73 Magazine, Peterborough NH 03458. ATTN Nancy Ciampa, Niagara Eiontier oiJ full sttjckinj Amatetir tk-aler M.wj Shortwave, CB, Scanner Marinr...

Power Amplifiers

All models include RF VOX & Low Noise RX Pre AmpL (no pre-amp in MML432 100) 2 Metro JOOW output MML.l-M-J0(VLS m ht 3W in L AV input 10W iniml 1W 3W m 254 95 96 S2U.95 S109,95 S J 14 95 MML43MOO J0W iuVu MMI.432.5ti 10W toput MML412-3U-L 1W r3W in 126& . L296 Milt Cumin* wm. Wilrii for ifcUifc. 2 Meter J Beams 12.3 dBd gain 8 over 8 Horizon pot D8- 2M by 8 Vertical pol DS-2Mvert 1250-1300 MHz 1 .nop-Vagi 1296-LY

N Grove St

CALIF, 92B06 (714) 630-4541 NOTE Price, specifications subject to change without notice and obligation. Center oft gives logic low The other terminal connect s pin 5 ot the 55b for automatic operation. The last options are the red and green LEDs Thev monitor operation and let voij check the unit without it being connected to your radio To power the unit, there are several ways you can go It you elect to build an at supply, I think you should use a voltage regulator You could get power...

Call Or Write For Complete Details

Diso available for tamo te s fte iifiktn& crossband & TOM SENSITIVITY SECOND TO NONE TYPICALLY 0.1 5 uV ON VHFT 0.3 uV ON UHF. SELECTIVITY THAT CANT BE BEAT BOTH 6 POLE CRYSTAL FILTER & CERAMIC FILTER FOR GREATER THAN 100 dB AT 12KHZ. HELICAL RESONATOR FRONT ENDS SEE R144, R220. AND H451 SPECS IN 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...

Fully Assembled

HAL PA 2,1 GHj2 STAGE PRE AMPLIFIER, DESIGNED FOR 2304 DOWN CONVERTER MADETOFIGGIE BACK ON THE 2304 BOARD Of FERS20 dB GAIN ALSO HAS AN IM AGE REJECTION FILTER 34.95 SHIPPING INFORMATION ORDERS OVER < ViLL BE SHiPPtD POST PAiD EXCEPT ON ITEMS WHERE ADOiTfONAL CHARGES ARE REQUESTED ON ORDERS LESS THAN 1 PLEASE INCLUDE ADDITIONAL 50 FOR HANDUNG AND MAILING CHARGES P.O. BOX 1101 SOUTHGATE, MICH. 48196 PHONE (313) 285 1782 31

Electronics

I See List of Advertisers on page 7 M This award requires Ihe applicant to work 50 different countries on CW. in eluding Germany inif all si* continents, an again the same 50 countries on phone. All contacts must he made on or after January i 1962, to qualify GCR apply and award tee is US S5,00 or 10 IRCs. The WGLC Award is available in three classes There are no restrictions as to modes. Thera are no band endorsements. AH contacts must be made by using more than one band. Each city may be...

Liberia

Brother Dan DonZfd, Stettes, CSC The Uberia Radio Amateur Aasoolallon Is making an all-out effort to help the Garv la Leprosy Control Center which finds itself praciically m a state of emergency The sworoomL mud-walled houses in which the paiients live are lyrmite- and rat-infested The lepers have no feeling < n their extremities, and the D3h* nEs awake m the morning to find hal their finders and leet tiave been chewed on by the ra s, The situation is bad, and Srster Dr. Chambers has made an...

Icom Headquarters

R y IC3AT i J JO Mil t* ico (j* UHii * t. Ut PjTge . a c 4ss m IfJi'iC Jj. i tut n- rtl.ng l.nsi 2 ft -fl jnc ir fTfif wai till I S 5CA ' J llfCl k T + rt HT I t * -iq T ' pit j M w- ilOCk Corr rrgmcttioni SpvciaUt'i SSM and S5 for moil any moh.ip or hand 4pplica 'j5 inct d mg tue v iy p sr Tcom Up io m,ie FM Trin.5m1ir.ng Hands rree ' VOX operaiion L ght waigm less i*an 9 0 vaiuaoie aid for Amateur use tn antenna insolation, tuning pruning, field day etc . plus hundreds oi ap plications in...

Eh

Lookup table The routines are straightforward and documented in the listing The program consists of four sections 1 clear memory, (2) acquire data and store in memory, and (3) recall data and prrnt character from (4) the lookup table. I used pages S31-S5F to > tore data, but any 12K block can be used by making the appropriate changes in (he software. Since an SSTV picture is approximately 125 lines from top to bottom, it's logical to store about that same number of values across each line...

Tux

Full-band-scan modification for the PC S-1000, The circuit is wired to the control board, which is the circuit board on ropof the control head External connections marked w ith an asterisk f *)are pin numbers for IC402. ICI 74C08 IC2-CD4066. Hon c> t the PCS-2000. External connections should, ot course, be made to the underside of the board the board is easily removed for this purpose. Ground connections should be made to the common bus on the board I hi entire i ircuit t an he built...

Radio Tl

2620 W La Palma, < 714* 761-3033 (213) 860-2040 Bf *een D'VO-a'xf 4 Knofl s Be y 999 Howard Ave , (41* 342*5757 5 rmtes south on tOi from S F A poc1 999 Howard Ave , (41* 342*5757 5 rmtes south on tOi from S F A poc1 5375 Kearny Villa Roac (6191560-4900 2811 Telegrac* Ave T (415) 451-5757 24 Downtown 27th off-ramp *E*'*4XkAh t * PMufc* wP fhiX- tAStWPi (Mm* + DT DOS fNOwftfl tefl futr 4WMfT* - BitOC * * TtC a pn& ft L * KjtSTlEH * C U - J * UilEA * h( S TCi * - -TtRNUT * fOO -pC UP'...

KHZ

SPECTRA PHYSICS INCr Model 088 HeNe LASER TUBES R0TR0N MUFFIN FANS Model MARK4 MU2A1 115 VAC 14 WATTS 50 60CPS IMPEDENCE PRCfTECTED-F PRICES SUBJECT TO CHANGE WITHOUT NOTICE (F< > r OrdOfS Oflly) All par s may be new of surplus, and parts may be substituted wiiri comparable parts if we are out of Mock of an item,

Montgomervville Pa

The Mid-Atfantlc Amateur Radio Clut will hole its annual hamfest on Sunday August T4, 19B3, from 9 00 im to 4 00 pm rain or shine, at the Route 309 Drive- r Theater, t * mile oorth ct RouteMont gomf ry iile PA miles norih of the For1 Washington interchange of the Punnsyl vania Turnpikel Admission is 52.50 will l 00 add rionai lor each tailgate scacf tailgate setup begins s e w am Thvre wlli be relreshments nd impie parkmg Talk-in on 4 7 66J.O (We3JO& Rli)r 45 52 simp'+w. For further informal...

Watkins Johnson Wj

LOOOpf .OOtuf* 1800pf .OOlSuf 27DOpf .OD27uf 10*000pf .0 uf 12,OOOpf .012uf 15 tOOOpf ,015uf 18,OOOpf ,OlSuf Frequency range 3,6 to Power ouputT Min. lOdBm typical 8dBm Guaranteed. Spurious output suppression Harmonic (nf0)> mlnP 20dB typical, In-Band Non-Harmonic, m1n, 60d& typical, Residual FM, pk to ftk, Max, 5KHz, pushing factor, Max, 8KHz V, Pulling figure (1,5 1 VSWR), Max. 60MHzt Tuning voltage range +1 to +15volts, Tuning current, Max. -0,1mA, modulation sensitivity range, Max. 120...

Regulatjon

In 19S3, the French administration (PTT) began using a new amateur examination Nevertheless, the license characteristics are unchanged. Ft icodeles radlotele phony lor frequencies above 144 MHz, and F6 radiotelephony and radio telegraphy for ail frequencies allowed (Fa, 9, 2. 3, 5 are t je former F6J. instead of taking tfte esaminaiion at homeor at a radio club, the candidate has logo to oneof ihe nine centers lexcept for handicapped or 65-year-otd persons). Two or three sessions are scheduled...

Polyphaser Protection

With X PolyPhaser s new rotor-cable lightning protector, you can obtain proper proteclion for your shack's rotor control bo*. The 0-conduclor model IS fiCT is designed to have a fast response time witn 50-nanosecond, th e-eiemeni cro*bar gas tutnes You can mount it on a ground pipe or lower leg. and the case is made with UV stabilized plastic and stainless Steel grounding hardware. Trte PotyPbaset roror-cai ie lightning protector

Tma

The KENWOOD TM-201A 2-meter FM mobile transceiver is designed to be tbe ultimate in compact size and lightweight, allowing maximum flexibility in automotive installations. New microprocessor controlled operating features, improved receive and transmit circuitry, a powerful 25 watts of RF output, and an easy-to-operate front panel control layout are packed into this new, ultra compact radio, providing extended flexibility and ease of operation. The complete TM-201A system is supplied with a high...

Worked A Sheboygan Award

With activity on TO meters at an ail m high, no* js your gpporluniTy io eam ir very attractive WAS Worked A Shebo gan) Award All ih,i is required is Ihai a control rnade with any station in Sheboygr Coun(y. Wisconsin. On th*> 10 meter ban To apply, merely send youf logbook * formation to Ihe Awards Manager* Sh, boygan County ARC inc cams orin J High School Sheboygan wi & 3081 a3 gesture should '< ou find thai earning it award is impossible, why not drop the J High School a letrer and...

Micro Control Specialties

Massachusetts 0 1834 elephone 6 I 7) 372-3442 -- See i > 5t o' 4d,enters or page 1F4 Stan G Mis co W1CV 4 533 Cora i ay. Apt U Cora Cable s Fi J il 34 Take Azden 's popular 2-meter rig and add all the extras you ever wanted. he PCS-21XX), A den's first radio on the US amateur market, is an extremely popular 2 meter FM i igt I herr have been numerous modifications for th transceiver adaptations tor various specialized situations and this article is a compilation ot them,...

Economy Preamps

Our traditional preamps, proven in years of service. Over 20,000 in use throughout the world Tuneable over narrow range. Specify exact freq. band needed. Gain l6-20dB. NF 2 dB or less VHF units available 27 to 300 MHz UHF units available 300 to 650 MHz. P30K VHF Kit less case S14.95 P30C, VHF Kit with case S20,95 P30W, VHF Wired Tested 29.95 P432K. UHF Kit ess case S 18,95 P432C, UHF Kit with case 24.95 P432Wt UHF Wired Tested 33.95 P432 also available in broadband version to cover 20-650 MHz...

Lebanon Tn

The Short Mountain Repeater Club will holt) Ihe Lebanon Hamfest on Sunday. August 28, 1983. at Cedars of Lebanon StatO Park. US Highway 231 Lebanon IN There will be qui door facilities only and exhibitors must bring their own tables. Food and drink will be available. Talk-in on MG.3U146 91 For further Information, contaci Morris Duke W4WXQ 210 Diss payne Drive Don lson TN 37214. The Geneve County Radio Club the Bay Area Arnateur adao Club, the Lapeer County Amateur Radio and Repeater Club, the...

Novices Technicians

* Oort id Uor rsquHBrntfoi h eep you irom upgrading1 * Geneva1 Class Code course ra es you from 5 16 rirp.m * Simple, effective method heiipii you progress quickJy * Del Due album with two 1-hout cassettes and instruction bookiei Navajo caJtatter belt buckle. Hand crafted. Inlaid calMeMers of blue torquoise, rust coral, while ahiiione. iron wood brown, or mother of peari., Tne hghinm< 3 tjoJis are yeJIow Sire Med 26 x3 6 ovai Large, j - - cva Style Ladies c mena n> ens attaches lo the left...

St Charles Il

The Fox River Hadlo League will hold a hamtesl on Sunday Augusi 21, T9E3. at Ih--- Kane Counts Fairgrounds, Si Charles iL Located mkfway fcet een Elgin ad Aurora < n the Fox fhver Valley the ham fest can be reached from either ihe northwest or east-west toliw& ys via the state route 31 exits. Advance llckets are 2,00 at the galeh S3,00, Overnight camper and motor-home parking available by prior arrangement is S3.00 AH commercial exhibits. contest anct ernonsUations will be Indoors. There...

Sweden

Fta fie Ma Tmsson SM2DMU Sike< i 3173 I have covered the regulations concerning amaleur radio in Sweden, so ihis rnonti' witt give you the details lor obtaining a reciprocal iscernse it you are pfan ning your holidays m S r Jer The follow ing rs an exlrdci horn a memorandum published by the Swedish Telecommunication Authorities, The Following mis itiusi be conformed to by any foreign national wishing to obtain a permit tc hold and uilltfe an smaieur radio transmitter m Sweden On condition...

Cushcraft

A3 IO l3 b 20 MHZ 3 ELEMENT BEAM. 1 7b. 93 A* IO 13 1c MHi 4 ELEMENT SEAM Z2 - 30 A3SK A4SK S S HARDWARE FOR A3*A45 41.30 AJ2 3V 144-146 MHZ I4 ELEMENTS - S3.00 AV-4 10 13 20-40 M 1 4 MA VE VERT l CAL 03. 00 AV-3 IO-15-2O-4G-0O M l 4 WAVE VERT I CAL. 90. 70 ICK3C 20 3 ELEMENT 5KY BEAN. 76. 30 26 MM 4 i LErttNT iiKY WALKLR E.tAM, 90.00 21 HH2 3 F LEHE NT .WY UALK R ULAM. 97. OO 71 nHi 4 . LEM1NT SKY WALKER BEAM1 4.30 14 MHZ 3 ELEMENT SKY WALKER BCAM174.30 J4 MHi 4 LLt*NT SKY WALKER BEAM242.3G

Ham He

We are happy to provide Ham Help listings free, on a space-available basis We are not happy when we have to take rime from other duties to decipher cryptic notes scrawled (ftegibty on dog-eared post cards and odd-sized scraps of paper. Please type or print your request (neatly ), double spaced, on an 8Vsx11 sheet of paper and use upper and lowercase tetters where appropriate, Also, please make a 1 iook like a 1, not an which could be an l'el or an eye. and so on. Hard as ft may be to believe,...

Tss Filter Deal

For superior performance ai lower cost, use lop-rated 8-pole Fox Tango crystal filters to fill the optional spots in your rig. For example, our 1800 Hz FT2808 equivalent at the YK8& SN has a 60 6dB shape factor of y.7 compared with 2,0, a price of SS vs 563, and squarer shoulders at the top with steeper skirts ail the way down to more than - 30d B For more pleasant audio use our 2100 Hz for SSB and or our 6000 Hz lor AM For CW, our 400 Hz unit is better than the YK88C, while out 250 Hz is...

Vhf Dx Activity

Lauro PY39ZM is located jn me ciTv oi Sao SebastiaodoCai in Rio Grande do Sul Slate, Soulh Brazil. He is listening almost every day on 144 3 MHz SSB or FM irom 2300 JO D200 UTC. trying for OSOs wiin Central and North America. Lauro uses a Yaesu F TV-901 iransverter with a BrazilIan Mac VS iQOJlneai ampfilier exciiedtov an FT802 DM transceiver. The antenna Is a 15-elementyaQF polarized oMS degrees, Lauro has already worked FM7CS, JB8AR, J73CS, and J73PD and receded all of tlioir GSL cards,...

Cs Position Coax Switch

CN 320 1.8-60 MHZ SUR PO * METER 69.73 CN-340 30-148 WZ POWER METER-------77.23 CN-620-B 1.8-ISO WZ SWR POMRE fCTER---108. 00 CN -607 HO i'SO MHZ . WR .TOWER ME TER, . . . 1 29.80 CN-720-B 1.0-130 MHZ SWR POWER METER.- - 133.OO CNIOOIA AUTOMATIC ANTENNA TUNER 311.OO S'l 2 MTR. SYN. 143 147 HZ 51 1 2 riTR. SYN. U r i PAD, . s-lb 2 MTR. 3 WATT H H 140-130 MH S-i5B P 2 MTR. 3 WATT H H 130-160 WZ S-15T SAME AS 5-13 WITH TT PAD S-lSTBEJtPSA E AS S-13B WITH TT PAD_____ ACH-13 AC QUICK CHARGER FOR...

Gld

CENTRAL NEW YORK'S MOST COMPLETE HAM DEALER CENTRAL NEW YORK'S MOST COMPLETE HAM DEALER Featuring Kenwood. Yaesu, Fcom, Drake. Ten-Tec, Swan, Dentron. Alpha Robot, MFJh Tempo, Astron, KLM, Hy Grain, Mosley, Larsen, Cushcraftt Hustler, Mini Products, Bird, Mirage, Vlbroplex, Bencher, nfo-Techt Universal Towers, Calfbook ARRL Astatic Shure, Coltins. AEA We service everything we sell1 Wrjte or call for quote. You Won'l Be Disappointed. We are lust a few minutes off the NYS Thruway (1-90) Exit 32

Reno Nv

The Wide Area Data Group will host Iht APRL Pacific Division Convention or August 19-21,19S31 at the Tennis Paviitor at the MGM Grand Hotel, Reno NV Th( convention halt will open at6 00 pm on Fri day, Auguil i9. and close at 3 00 pm or Sunday August 21 Tickets for conventior facilities oniy are 7,50 in advance anc Si0.00 at the door, Uckets for alt facilities including ihe sanque ana afre dlnnef sessions art- S35 00 m advance and S37.5i Ai ih( door Theri1 will bean indoor Swap Meet with i ables...

Sca Specifications

RF Input Power for lull output 40W, (SCA100) or 10W, (SCAmiO) Duty Cycle 100 q Continuous Frequency Range 406-512 MH2 Voit age Current 136VDC nom i5Atyp (SCA100) Size 10Vi H x 19W Pane i. 9 Deep. The SCA100 100 Watt 440 MHi Power Amp & Its companion power supply were specifically designed for absolutely 100 Continuous Re* peater or Base Stalion Duty I.e., key down tor hours < or even months at a time, it is definitely not just another mobile amp lofted to a rack pane Both units use the...

Study

NOVICE LICENSE STUDY GUIDE by Timothy M. Darnel N6RKr Here is the most up to date novice guide available- It is complete with Information about learning Morse Code, has the latest FCC amateur regulations and the cuf ni FCC application forms, his guide (s not a question answer memorization course but rather emphasizes Ihe practical side of getting a ham license and putting a stallOn on the air It reflects what ihe FCC expects a Novice to know without page after page of dull theory The most...

More Gain

FfEiqumcy Range '170-899 MM Channels 14 Du pul Channel 3 CM 2 or 4 AvaJl To ma-e a UHF tuner into a GILCO HIGH GAIN TUNEfl each and every one q tfte following siecs is pams ktog y a, certified technics V Tte tif& ihmg GiiCO does ts change ihs standard ciode to a hat carrier diode 2. The Tuner 's output is men mealed on our JEBROLO field strength meier and compared to a computer domed chart Irom whtch we determine The correci value coil to add across I he IF output lor maximum pro-peaked gain...

Dealer Directory

J Lin's Hinwies, 39 J Sepufmla GKd Culver City CA 9fl2.m 390*3003, Trad** 463 1886 Sa* nuTici. x. I Reno NVi Complete lines COM. Dt- iT n I* r T( ct Mi r rti-l . f i hit.-. Lu i r i jvfcr 4IXX) elect rr inie prw lucK Foi fiohlixi N EiiiiLun, r jwrLmwin'r Alwi CB rsj-dio. IjNclimkEFik . Fontiiiu fcfeclrtaik*. Sierra Av , ft nttn* OA fJ233,ri 22-77L . TO WE HS--galvLini ci I jttw i-k'Vranknp and itvewjrit*. Pi rth rn California Factor)' dirtsti U-rou California Antrim* Systrmi, fi 20 Windv hidi...

Cook Books

TTL COOKBOOK- by Don Lancaster Explains what TT L jsh how It works, and how lo use* il Discuses practical applications, such as a digital counter and display system, events counter, electronic stopwatch, dtgnal voltmeter and a digital tachometer. 0KTO63S9 5O CMOS COOKBOOK by Don Lancaster Details the application of CMOS tne lo* po*er logic family suitable toi most applications presently dominated by Til Required reading for ever* s*jfious digital e - TVT COOKBOOK by Don Lancaster Describes the...

Dtmf Digital Control

* Provides digital input and output capability under the control of a DTMF decoder * Perfect for repeater, remote base, and other homebrew control applications * 21 separate i o pins which can be set high or low by a tour digit custom sequence. Each bit may be checked by entering a digit code 1 tie chip will respond with a Morse code 1 or 0 depending upon the togic state Direct interface with the Mostek 5102 DTMF deconer chip * Anti-jamming mode automatically activates 1o prevent tampering *...

Cuide

Timothy M, Daniel N8RK This is the complete guide to the General License. Learning rather than memorizing is the secret. This is not a question-and-answer guide that wi.l gather dust when the FCC issues a new test- Instead, this book witi be a helpful reference, useful long after a ham upgrades to General. Includes up-to-date FCC rules and an application form. Order yours today and talk to the world. SG7358 6.95 Q5L CARDS - t rnt ou1 a fantastic ser . of G5L cards al about naM the - st o ha*.rg...

Qsl Of The Month

To mosi hams, a callsign is as important as a name Countess hours have been spent devising memorable phonetics for calls Of selecting the absolute best phonetics lor a specific purpose those the most audio punch rot ramming through the OX ptleups ot those with the shortest number of syllables for rapid contest calls. But There are hams among us *ho haw-. t he go< xi fortune ot a cai i sign Instantly recognizable Such is tho case with this monlh's Q5L ol he Month winne r. Chuck Cngleri W3PfG...

Mfjq

Two independant 24 hour LCD displays Read bath GMT anc local times ai a glance Si* digit main display as seconds readout. Four digit auxiliary. Switch reverses main aux Atarm plays 4 selectable mefodies Alarm indicator Snooze button Quartz timing. Synehronizadte fo WV V Flip-top cover serves as srand. Night light. For ward 'reverse fas siov, set Outions. Lock Junction prevents rnis-setlsng Display main time only main auxiliary or main alarm time Includes battery 4x2x1 2 inches, Switchable 24...

New Award From Pars

Ttie Po ay Amateur Radio Society PARS has announced tnat a nandscme new certlllcate known as the Obi n guisned PARS Communicator, is now avaiiablfT The certificate has been issued to promote amateur radio contacit between PARS members and (he amateui community at large. To qualify for rhe PARS certificate, operators must contact 5 PARS members 25 lor San Diego Coun ty residents and then submit their list of contacts in log form *ith an SASE to Operairoiv PARS PQ Qqx 99 , Powav CA 92064

Amateur Radios

Whether you want 5 Amps or 30, this I supply ran give it to vou But you onk pay for w hat you need W90DK VisiCode The VIC 20 Way to Extra Class First you get random practice groups Then you gPt the answers Onl steel nerves and )urk stood between the 1979 DXpedition and disaster KB7NW Carrier-Operated relays are the most* used circuits in anv repeater Use this simple design to get maintenance-tree operation VVA7SPR Precision Speed Control for the Billboard Keyer Get more lor your money by adding...

KV with No Traosforme

You need high voltage, but surplus transformers can't turn the trick. Try this solid-state solution. One drawback of the proliferation of solidstate components has been the disappearant e of highvoltage power supplies and components, particularly high-voltage transformers This became clear about two years ago when I needed a negative 600-volt supply to test a surplus reflex klystron. The currenl requirements were less than one hundred microamperes After realizing the junk box no longer...

Papua New Guinea

Once again. greetings irom P29-land to ti amateurs around the *orid The New fUinOJ Islands received a lot Of shakes uring March one earthquake regiatunng 5 on the flicnter scale lasted four 1 mutes and was followed toy dozens of jrsnoci-5 Fortunately, no loss oi life nd not loo much damage were suffered nd i rr very happy lo report that there as no damage lo rig or antennas That ouid have been a real disaster Sob P29NBF in Goroka hada visit from he e ecrror.'C& king of Australia. Dick imith...

Low Loss Foam Dielectric

RG0X 95 shield S14,95 100 ft or 17c fl. RGSU 60 RG5BU 80 FSGfiflU 95 RG59U 100 foil shield. TV type 7 100 fl. fCHp it. RGSU 97 shield 11 fla(equfv Belden 3214> 31e rt. Heavy Duty Rotor Cable 2-16 ga. 6-18 ga 36< tm. ftoror Cable 8-corv 2 18 ga. 6-22 ga 19* 1 L RG9U-20 ft,. PL-259 ed. end 4.95 RG214U dhl silver shield, 50ohm 1 .SSJfi. 100 ft. RG3U With PL-259 on each end 19.95 BELDEN Coax In 100 ft. rolls Grounding strap, heavy duty tubular braid1 3J16 In. tinned copper 10* it 3J3 in, tinned...