Communications Design

U05 Lem St - West Memphis Arkansas 72301 Mute- HFCA t jfTiftr-trtv BUtOfTiiMic bart s iti-f - g C' 1(. 3. . -TieiiWS C 1 r f r ft . 4II 4 iiiJ 5 r- n. i s-cirti -us at vncwai t ir kj- vais in i_ -il WO htJ tdn . iv. e Decesxt p 81 1 1 > 0 IT*Iijt op Don avfliijibfg now, tetrofn kic ftpr remoir ng WAfl ct iiLiT j v. p Mt- jrt 26 Tv7 mel r ryi-T reqwfpd m t l .1-.-ijHij ii.mii Modi2l2MI'> n mm> ni- cwnni tirccnrjrnil OMI'-HSJI gain vortical loi ir -li-r hn in Im Q in as dOLitjio-rH>...

League City Tx

The Tide dna Amateur Prfdic Society (TARSi will hold g-r 1& 85 Sr nng-Fest on Saturday. ApnJ ifi. 1983, at the fairgrounds In League City TX. There will be free admis slon and plenty itparklng Breakfast will be served at 7 00 am and act Ivltles will begin al 9 00 am Activities win include a hea mar.' ko . a swaplest an auciion. dealers displays, demonstrations and iunch served Between i7 00 am anc 00 For add tional mform a tion. contact TARS, PO Box 73 Texas City TX 77590 The Oak fcldge ARC...

Vhf

Hi PRO TRANSMITTER Designed for Repeater service with excellent stability, harmonic rejec tionH low sideband noise and audio reproduc-1k> n. Up to sut channel opera non, very coof operation, adjustable power up to 5 watts on VHF Also available mounted in die cast aluminum R.F. housing. Can be used with our new 25 watt continuous duty power amptfier.

Ic Inserters For Pc Boards

OK Indnslries, nc , har, Just Introduced a new series oi IC Insert Ion tools wllhdtmenj slons optimized tor diroct insertion inio PC Hoards without sockets Special Jong Doay style facilitates firm grip and thumb action 'Of iicturaie and comfort able on s-hand operation. Rugged nJcKle*pfat f steel gyides ensure durability and provrde stanc safety, important hen using MOS and CMOS ICs Designee lor U-te-pm iCs (mode B8M416) afld 24 25 pm ICs imodei Bl These npA inserters are avaiiatota from stock...

Astron Power Supplies

HEAVY DUTY HIGH QUALITY RUGGED * RELIABLE * SOLID STATE ELECTRONICALLV REGULATED FOLD-BACK CURRENT LIMITING Protects Power Supply from excessive current & continuous shorted output. CROWBAR OVER VOLTAGE PROTECTION on all Models except RS-4A. MAINTAIN REGULATION & LOW RIPPLE at low line Input Voltage, HEAVY DUTY HEAT SINK * CHASSIS MOUNT FUSE ONE YEAR WARRANTY * MADE IN U.S.A.

Beeper

THE PROFESSIONAL TOUCH COMES TO AMATEUR RADIO HP iutnmaticaUr provide frntta highfrer Jtiun v r I- - at the beginning of each remission and * low beep al the end Virtually eliml-i. kiflp ulk -ver ' Operas far up to onf .vear on * single 9-V battery mot supplied i Can be Ettrecily LntttrfiCBd ic trajMraivar which is y nr uihUH UIB l l' it-- V.-* lina vnitfjjp must be positive, not gmfikr than 24 VDC n r - gmanl greats ihar. .00 mi W rit w.i v rt U modern ir Tou n ijeani L r w yc_L can have Hi...

Microwave Television

Surge Voltage Protected iS L INTEGRATED ELECTRONICS INC. Model RP. . . , 135 (15 miles) Box 204 Carlisle, MA 01741 Model RP + . . 150 (25 miles) Send check or calf order to 617-369-0536 Dealer Discounts, Write for info on our TVRO Satellite Products. H you are active in amateur satemte communications. il s time for you to share your knowledge rtith olher hams try veiling articles for 73. We are ooking for material on a wide variety of satellite topics Your fellow amaieurs wJt be particularly...

Cpo

Rur of J I2V C i Ad oui 1 KH2 qo d tor CPO ' a- a., -r.o Ose ator c mpi'+.itf * ' 12.95 An interesting small mike picks up sounds anc converts thern io light The louder the sound I hi.' brrghtei (hp lighl Includes mike Conkots up to 300 W runs on 1 10 VAC Complete kit WL 1 16 95 i - ),, r. LOLTC ear sttatteitf and Civ supply up to ms ' oono * < hrt audi o Runs on 0-15 VOC

Test Equipment Library

II AUDIO FREQUENCY TESTERS-Jam-packed with all kinds Of audio frequency lest equipment. If you're Into SSB, flTTY. SSTV, etc,, this book is a must for you , .a good book for hl-fl addicts and experimenters, VOL lit RADIO FREQUENCY TESTE RS-Radio frequerv cy waves. I he common denominator of amateur radio Such Items as SWR, antenna impedance line Jmped ance. RF output, and field strength detailed instructions on tesimg ther-e ilems includes sections on signal generators. crysial...

Awards

Certificate* to the highest scoring sta-hon in each state. province, or country wit 2 or more entries. Entries automatically consider 1 tor annual Triple Crown of QRP Award. Separate log sheets are suggested for each band to' ease o' scoring Send iu ii log data* including full name, address and bands used plus wpfk sheet showing de-talis and Mme(s) off air No log r.opios will be returned. All entries desiring results *nd scores please enclose a business size envelope with return postage for one...

Info

Bangs, bumps, scrapes, and crashes make life tough for HTs Make these modifications to protect your invest Never Say Die 6 73 International 70 Social Events 94 Satellites 97 Letters 97 Fun 99 Ham Help 100T106 Review 102 RTTY Loop 104 Circuits 106 Corrections 10 Reader Service 114 New Products 116 Contests 118 Awards 120 DX 122 Dealer Extensive Versatility for the Serious Operator

Kilobaud Klassroom

Make* learning eJectronits futi nd easy First published as a series Id Kilobaud hficroa> mpvhng, the book combines the learning of essential theory with practical, hands-on experience. The course begins with ba.sk electronic projects and culminates in (he construction of your own programmable microcomputer, The direct instruction methods of authors Young & Stark maki KILOBAUD KLASSROOM a simple way for you to acquire h background in digital electro uics> BK7386 419

Atv Downconverter

For mo*- who a ant tc see t -e A TV act'on betor h y commi to a complete station ihe TVC 4 is tof you G'eaT tor public ser vice setups, demos, and getting a Ouddy interested Jusi acid an antenna and a TV ettunedtoCH 2, 3,or t and plug into 117 *r ir+ a TVC-4L extra iow-noise version. . 105 delivered in USA home9hew rs ask for our basic four-module package CALL OH WRITE FOR OUR COMPLETE LIST OF SPECIFICATIONS, station setup diagrams, and optional accessories wtiich Include antennas, modulators,...

Auntie Beeb

We gruatly appreciated Roger Peterson's piece on Auntie Seeb in the Lmuary issue. We us d to lisler. io World Service news when we ived in Berlin also -vi' were hap-p1. 3o i nd out v h re Margaret Howard was ihese days She attended Indiana University in BEoorningion IN in 1969 I was fortunate enough to be in one ot Ihe same giad-uar -r.chooi loumai'c courses that she vkasr and so we became Li,cqiiainted. WD9HDZ and i last saw Margaret in London m 1975 or so and had smcr tost touch The frequency...

O D U Lato R

The MPS-lKit converts Vicfe Audio signals to a crystal conlrollec RF-output *or TV Channels 3 and 4 i t The MPS-1 rvljJciul tLJr inputs 'J '' ii. * designed EQ match all TV *cameras and VCR's and features a voltage regulated power supply, power switch and LED indicator. No l'unrng Required Operates on l T 7 VAC. Bambi lets you enjoy using your video equipment The way it should be electronically and on line at the push of a button. j odel BEVS-1 foigfpfetety Wtfed1 and Assembled Includes...

In Dj A

A mar v ite wyee 02C2 PO Box 3005 New Dettot-3 India Trie Government of India has permitted each Indian ham to obtain loreign exchange lo me turte nf aoout 1*000 dollars ever) year lo import irn.lEqut equipment, pans, and instruments, If is not necessary to obtain an import license hams can jusi go lo the bank and obtain a dralt or open tenor ol credit on the basis of a pro 'orma invoice, Customs duty Is about 68 percent for transceivers and more than that tor other Items. lhree Indian...

Mhz Frequency Counters

The new Models 6000 anc t 50C 650 MHz Frequency Counters. Introduced by Global Specialties Corporaiion offer outstanding performance and ease ot operation The 6000 features a trimlined front panel with optimally accessible controls, push button opeiation. bright L Ddisplay, andeKireme-ty accurate frequency measurement I'om less lhan 5 Hz lo more than 650 MHz. The standard Model 6000 Frequency Counter has a 3 5 Hz lemperalu re-compen- ied crystal osciiJasor limtr base An optional crystal oven...

Derry Nh

Copy was possible only by switching to Inapposite srdeband on (he transceiver* mode switch. Of course. mere were some instances wnere (he liliers in Tne interface were not selective enough lo separate two closely spaced signals. i was disappointed in ha manuals tor the Kantronics products neilher was very well organized In addition, the Hamsoft Instruo-lions were much loo brief. Jacking even example of noiA o use Ihe system Exampies are absolutely essential, especially lor newcomers. Quymg a...

Heard On The Long Haul

Tafitti FO8 Ross Forbes WB6GFJ passes on *ord of in new address lor thr-Tahib QSL bureau Send your FOB ca t to Radio CiuO French Polynesia 0 P 500e. Pirae, Island ol Tahiti, French Poty nesiar Souih PaclMc Ocean. Don't send cards tor FOQ call as mese ire usually visitors to me islands and wil1 not receivt ards iiE> 'il LO Tahiti. Find a stateside man ager w OSL address Philippines DU Rick Todd N8CWX offers CW conracis from the Philip pines Drop nim a line via PSC Z Box 12956, i Q San...

Standard Features

Compatible with either rotary or tone exchanges 16 Digit buffer memory dial as fast as you want QUALITY AND ENGINEERING THAT YOU CAN DEPEND ON Compatible with either rotary or tone exchanges 16 Digit buffer memory dial as fast as you want 1 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 with speed dialing equipment Operates superb through repeaters no...

Oixon Il

The 17th annual Rock River ARC Ham-test wm be heiu on Sunda, Apr i 10. 933 at the Lee Cotjnfy 4-h Cent* * one mite eas of junction of Rtes. 52 and 30. A ticket dona tion is 2-00 lr> advance anrj 42,50 al the gate Tables iG-toot) Hl t iivaiiaoie S5.00. Doors will open at 6 30 am for dealers and 7'30 am 'or the genaral public Breah ast and dinner will be served Talk-In on 37 .97, For more information and advance tickets write 10 Ed Webt) WD9CJB. 616 Orchard Street, Di*an IL 61021, ot phone (815...

Mike

A super high performance fm esi mihft hil1 T rjnsmrts a stat'e s- nai up lo 300 .i - * h eiCep 1 c-r i t. h, f' o- t t5ui r -n ele gl ret rr te k't includes iM *up*r inslnuctwis i rhe H Pir unii j , at-'e Transmit up to 300' To any FM bF ed& s rad o US S riny ivpe of mikp Fhrns On 3 ID 9V Tvpe FM 2 has added sensitiva mike prpamp stage F M 1 kl I3.BS FM-2 k> l 4 95 FrovJd me banc parts antf PC board H-OU' -TI pfowide saute UH 555 h 1er IC d nciutfe* i fange of carts tor mosi Sph music come...

Qsl Of The Month

This month s QSL comes' winner Oa*flShiptett W17ACY infrozen north country of AF4s 4 Hift taiti depicts a grimed 49e- panning to* goi while listening to an HT propped a 53 ins I j nfartty roch The scene rnay riDT De e*aci y typical of rrio sm Aia& an i , but it quickly ifenlih * th* oca 1 ton of David's station The catisign is T.acte Ifom buch ogs which is a commor jvood in the Fairbanks area, and the card is dfaw-n Dy j oca' anis II you wooia hi< * ic enter 73 s OSLof ihe nihConiesi. out...

U

A complete lorn- decoder on a imgie PC board Features *00 5 X)0 Hi datable range via 0lyrnpc-r vonaue regulation 567 IC Useful for touch-lone burst lhjtf> rrion FSK etc Can alSO be Used as a sfniblp lone encoder Runs on 5 fn 1 volts Complete Kir. TD-1 (5.95 wail c ararlerislic of a police s rer 5 Wpeah i idiOOutpul ru s O 3-15 vo'tl uses 3 45 ohm speaner .-1 err 5 i OC - T - -r t-J Jf F * fl

Box

URB ANA, ILLINOIS 61801 217-367-7373 Phofo D The horne-brow ground-plane antenna. Radiais arc 12 house uire I he antenna can be almost anything suitable ior vour Held-Da location. Since we were at a 1 500-foot elevation overlooking the Los Angeles basin, simple home-brew quarter-wave spike with ground plane proved more than adequate to reach all corners of the basin, full quieting. Number 12 solid copper house wire was used tor the > ike and radials on an upside-down SO- 39 connector, as...

General Class Only

This leiier was prompted by the tellers that 1 read In Ihe January issue at 72 I nav a few comments that t think win riieupham-dom as quickly - commen+ First t like Ihe ARRL regardless oF what you say and l am assuming mal you get your copy of OST each and every month, il you M level wtth us Second 1 ihlnh that your opinions on QSTare fostered b* word-oE-moutn interpretations ol trie goings on of the OST stalf Don't you wish that you had the income that is wasted by osrf Anyway, I subscriba to...

M

Paris arrangement inside the new BP-4. See if si of Advertisers on page 114 Fig 7. Battery eliminator for the IC-2AT. D1 6,2-V zener, 1 W, 1N4735 (RS 276-561) D2-12-V zener, 1 W, 7 N4742 RS 276-563) D3-6-A SCR, 70-220 (RS 276-1067) C106 D4-LED red TLR 107 (RS 276-033) R1-1000Q, 1 4-W resistor R2-220Q, 1 4-W resistor R3-22Q, 1 4-W resistor C1 220-fiF electrolytic capacitor axial 35 V dc (RS 272-1017) RG-1 -LM309K regulator, 5 V coax plug (RS 274-1550) and coax jack (RS 274-1549) tie-down...

Fc

> e SP-102 External Speaker Audio Filter features a large, high-telrty speaker with selectable low- and high-cut audio filters. > e front panel A-B switch allows selection of two receiver puts for maximum versatility. Also available is the P*102P leaker Patch. se your Authorized Yaesu Dealer today for a hands-on rmonstration of the rig that everybody's talking about. It's the M02, The Transceiver of Championsl Price And Specifications Subject Tg Change Without Notice or Obligation

S

Fig. 5. t tched board for mounting the two MAN 74 readouts on the front panel. Fig. 5. t tched board for mounting the two MAN 74 readouts on the front panel. Fig, 6 tched plate to show fhe positions of SV 7 and SW2. Fig. 7. Control PC board foil sideJL Fig. 7. Control PC board foil sideJL the strobe of the 14435 and turns on the line drivers al the proper time. a Radio Shack cabinet. Unfortunately, this is a steel cabinet and is hard to work with Ftg 4 shows the layout of the panel The panel...

More Advanced Ideas

Solid state and broadbanded* the HW-5400 incorporates more performance-improving features at a lower price than any comparable transceiver Its fully synthesized for crystal stability and accuracy Operating in USB. LSB and CW with automatic sideband selection, it has full break-in (GSK) for proficient keyers, two memories per band, power supply activation at the Transceiver, defeatable amplifier relay, reverse and over voltage protection as well as high VSWR forward power cut-back circuitry for...

No Code License Arrives

The no-code license, long a subject ot hot debate in amateur circles, took a step doseMo reality recertify When the FCC proposed two changes in the aniateur regulations One of the Commission's proposals would allow volunteer examiners to conduc t amateur tests, a change that was made possible by lasi fairs legislation The Commission tuggesied two possibEe alternatives tor the no-code license Onr> would nstabllsh s new class )l license similar to that of the Canadian Digital class, and the...

Xvq

Use the order card In this magj .ineor itemise your order on a separate piece of puper and mail lo 73 Radio BookahQP Petoi hurough N H Be sure lo Include check or detailed credit card information No O.O. D. orders accepted. 31.50 for the first book, 1.00 each additional booh for U.S. delivery and foreign surface For foreign airmail 1000 por book Fle& e allow 4-6 weeks tor delivery Questions regarding your order Please write to Customer Service at the above address, (Prices sub ect to change...

Srt

* Gun Hn demodulator & AFSK modulator for 170.425.850 Hz shifts, hmh and low tone pairs * 60.66 75,100.132 WPM Baudot 110.300 Baud ASCHi, 5-99 WPM Morse 1000 character text buffer with BREAK feature Ten 80 character message memories with battery backup Setectable display formats, 24 Sines x 72 characters x 36 characters (4 pages), 16 lines x 36 characters screen operation * Or screen status line displays a speed, shift, tone pair, normal reverse, USOS, WRU, SELCAL, buffer mode and buffer...

Licensing

As you ma) nert- reciprocal licensing agreements e*isi Between a number of Countries and the Federal Republic oi Germany 4nd it ts interesting o Know .vh.- h choices you hai, lo obtain a license in this counlry. First. Ihe class oi license you may apply for Class A requires something like j Novice or Technician iicket It allows a majtirflum power output of i5Q VUattsor, al iernatlvelyt a fig with .l maximum piatefcol-lector dissipation imanu'acturer's Hiatal m Ih final ampliliei oi 50 Waits You...

Compro

Others claim more gain for their antennas than the lsoPole'M antennas, but none can beat the IsoPofe for HONEST on-the-hori2on ornni-directional gain unless you are willing to spend at least THREE TIMES AS MUCH The IsoPole is easiest of ALL competitive models to assemble, has a weather protected, factory-tuned matching network, (no more aggravating SWR varia tions wiih weather changes), uses all stainless steel hard* ware, and is designed to withstand severe icing and wind conditions. The...

Innovators In Digital Communication

Set List Of Advertisers on page 114 Adam M. Perkins WA1UNU 33 Winter Street Farmington NH 03035 Build this and get state of-charge readout, automatic shutdown, and charge maintenance for your HT. This could be the gift of life for your battery pack. If you use an HT, you will very likely have two battery packs, Proper cycling of charge and discharge is essential for long life for nicad batteries. Carelessness in this regard has recently cost us cells in three nicad packs. One was in a pack for...

Intelligent

Remote receivers oh Remote bases Home control Security Chartes W toM KN6H 1843 W 244 r fr Sired omita CA 90717 Pedal Power A Perfect Field-Day Generator This bicycle-driven power source is easy to build and guaranteed to get you in shape. No heavy breathing into the mike, please. Five QSOs by natural power That's all you need for 100 Field-Day bonus points Did you or your club lose out on those giveaway points last year ProbabK figured it was way beyond your means, right I mean, how many clubs...

Raleigh Nc

The Raleigh Amateur Radio Socjety a ill hold its 11th annual hamfest on Sunda> April 17 reg nn-ng at B 00 am at the Crabtree i ey Gallon u 70 a est Admis siOr s 00, wtth a char5e for tail- paling tn nhe covered Itea market Tables will be available for rental. Features will Include a CW contest, a home brew contest, and special-Interest meeilngs Talk-in on .04f.64 and 28 .0 . For additional inforrna-Hon, contact RARS Hamfest, PO Bo* 17124. Raleigh NC 27619-

Tss Hf Transceiver

The T& 430S. a recent addition to Ken wood s line of high-frequency transceivers, is an all solid slate SSB CYJ and AM transcelvtif, wilh FM optional Deslflned to cover the itiO 10-meter amateur bands. In-cludinq the new VVARC bands, it e-jIgo Incorporates a 1S0-KHz-30 MHz general GoverEUjo receiver having an eJtaepUondlfy wide dynamic range. Other teatureo Include dual diglial vto's, eight memories, memory scan, programmable band scanH Hu& ros ceni tubediQila display all mod.- -rijueich...

Scoring

Twenty-five points 'or the completed puzzf or V point for each question correctif, answered. Five points for each correct answer. Element 3 Two and one-half points for each correct answer. Element A Twenty-five points for 1 he completed puzzle or two and one-hat f points for each name found. V2 points Born in 1965 21-40 points Amnesia victim A1-50 points Out of the country during '64 61-50 points Remembers it well 61-100+ points Photographjc memory

Counter Pre

MeoAurinh Jttremeiy weak signals from 10 to l.LXVl Mlli. Siti ll trr. V plug transform included * Great for sniffing RF with pick-up loop TERMS Satisfaction fluArirlle d Ejrinnine tor 10 days, if nrjl pleased relurri m ordinal foim ior refunci Add for ah jng insurance lo a maximum oi 51Q Overseas add J2 Orcrers undflF Sin jdo S r 50 Kr restOenti aod 7-1 ia< Jutl'f Ue txoaKs. 19 ScpuUeda Blvd Cnh Cii CA JQ23Q, 3fltMOOO. TwiWlim San C mplate lin 1COV , DttnTrom Ten-Tec, Mimp C.uhic, Limm nvti...

Dot

Time- When the 7408 has an output pulse it will Iriser the 2N2222A causing Relay 4 to open that breaks the return ground of holding Re fav 1 and kills the power to the motor that is turning the dish The 14025 (U12J lakes MAL 304 MH DOWN CONVERTERS FRE 0 RANG 2000 3500 M Hjj 2304 MODEL tl KIT BASIC UNIT W PREAMP LESS HOUSING & FITTINGS lt9 95 2304 MODEL 2 KIT (wilh preamp) 129.95 2304 MODEL IT3KIT iwnh High Gain preamp) 139.95 MODELS 2 & 3 WITH COA* FITTtNGS IN S OUI AND WITH...

Tcg Electric Generator

Therms Corporation has ust released the efficient new TC25G small-scale electric generator, The generator is designed to produce electricity at low rpm'c The specially designed TC25G it ideal lor dattery churgmg in boats, in recreational vehicles, or at remote sites sucin as Held Day or repealer locahons. it will charge in any system from 5 to 36 V dc A detailed manual is included with each generator With each c+eni -a or sola Th 'm c ffert free lant to Luild a wind, ater or pedal power gem ....

Roi

Electronic regulator to remove alternator whine. See Ltst of Advertisers on page J14 Mark Schm df WBWCA 524 S. 20th St Belleville IL 62221 Sound synthesis, a programmable timed onoff switch, and a CW keyer are all hidden in the TRS-80. You just have to look in the right place. One day a friend was comparing his Apple II with my TRS-80, pointing out al its special features. Color graphics that's nice. What do you mean, the TV is extra High resolution graphics needs 16K just to hold the...

Amid

Toroidal Cores, Shielding Beads, Shielded Coil Forms Ferrite Rods, Pot Cores, Baluns, Etc. 12033 OTSEGO STREET, NORTH HOLLYWOOD, CALIFORNIA 91607 Convert ANY hand-held into high-power mobile radio using VoCom POWER PACKET system AUDIO POWER - The Power Packet provides an amplified 2watt output so that messages can be heard above roao noise even with The windows down Use with your vehicle speaker, or with optional Packet Speaker CHARGE POWER - Charge is supplied at 35 mA rale which wftl maintain...

Amateur Radio

A no fritls directory of over 411,000 U.S. Radio Amateurs. SVjxIl, easy to read format. Completely updated. Also available lor the first time ever (ArphabeTically arranged -SOU SeparaJoJy. by Si ale City and St reel No and Call Send your order enclosing cneck or money order in U.S dollars so 70-1 Florida Hill Road K.dfteneld. CT 0687 ISA

Arbor Day Celebration

Starts 2400 GMT April 22 Ends 0600 GMT April 25 A special events station will be operating from the Nebraska State> Arbor Lodge, former home of J. Sterling Morton, founder of Arbor Day. in Nebraska City, Nebraska, during the annual Arbor Day Celebration This station, in addition lo other olub member stations, will be operating in the general portion of the phone and CW bands on GO through 10 meters. All amateurs contacting this station or any other club member station during this time will be...

Austria

Ot Ronald Eisenwagrter OE'JRE PC 00x999 A-1014 Vienna Austria Austra. located n the par, of Euroc g 'ig today atoul 45 0 , idio Tia-teufs There Is one Dig society. theOVSV ( sterreichischer VersuchssenoerverbandJ. v hich is a member of (he i ARU Region T A good 4200 of Ihese radio amateurs are members of the OVSV The activity is very varied There are about 40 wilh permission to operate on all bands real DX activity is poor. Not more than 2QQ amateurs cam be heard in international traffic and...

Audio In

QUTPUl IS 2.5VAC MAX C2 & C5 iMVLAR ft & R3 IMUL TLJHNI QUTPUl IS 2.5VAC MAX C2 & C5 iMVLAR ft & R3 IMUL TLJHNI QRM ELIMINATOR FOR COMPUTER CW Here is a dandy circuit which will filter out a substantial amount of QRMr enabling a computer to copy CW with ease. The LED on the output could be used to help the hearing-impaired to copy CW- The heart of the circuit is a pair of decoders tuned to slightly different tones which overlap each other The outputs are fed to a NAND gatey which...

Authorized European Agents

.Spectacular improvement in SSB selectivity, - Completely eliminates my need tor a CW fitter.S Simple In& taifaifo - excellent instructions., The Fox Tango filters are notably original 2.7KHz 8W units but especially the modest ceramic 2nd IF our substitutes are 8-pofe iTOFF RX8W 2.0 Vft .34 80dB BW 2 48 vs 3 41 Ultimate Rejection 11GdB vsfiO. VBT SET 1 _ _ t _____ _ _ _ .

Auto M

SSB, CW, AM, FM, memory and band scan, The R 2000 is an all mode SSB. CW, AM, FM receiver that covers 150 kHz-30 MHz in 30 bands. New microprocessor controlled operating features and an UP conversion PLL circuit provide maximum flexibility and ease of operation to enhance the excitement of listening to stations around the world. Key features include digital VFO's, ten memories that store frequency, bimdr and mode information, memory scan, programmable band scan, fluorescent tube digital...

Automatic

For transceivers md repealers AMATELIl * Autom iK opc- ation adju& iable speed arid ajpplrUtde * Small sue easy installatk& i volts DC * S selectable rentable message - each up to 2 mi J long - Wired, estec and programmed with yfckiT fe & ge si) Moael ID-1 33.95 Model lD-2 w fc to 10 m m e timer 59.95 We pffer a complete line of irafismittef sno receiver strips and synthesisers for amateUf and Qfcmirieicial use. Request our free catalog. AH6W 2 for UPS shipping Mastercard and visa wet...

Available For Immediate Delivery

NY (800) 462-7242 CANADA (416 884*3180 1319 PINE AVE NIAGARA FALLS NY 14301 (716)282 7470 TLX06066680 Put a broad bandwidth 80M dipole in 24 ft with the SLINKYDIPOLE * antenna. Comparable low SWR, space savings and performance on ALL HF bands, including SWL and WARC. Complete kit 2 special 4 coils, 50' RG-58 U coax, balun kit, mounting hardware and instructions. Great for apartments, condominiums, motels and vacation use. Easy set up and adjustment. _Ask for FREE antenna comparison sheet...

B G Carl Electronics

11126 Ciaire Ave, Northrtdg , CA 91326 Call 1-213-363-1216 c ytim j Gy6ann 73 Magsnne does no1 Keer subscription records on Ihe premises, there fore calling us only atUis time and doesn't solve ho problem Please send a description of the problem and your most recen dress labei to 73 Magazine Subscription Dept. PO Box 931 Tttanfe Oi Airc -.- < . , ur SutS Mptkm

Battery Eliminators For Handhelds

Handi-T& k has announce its line of oa lery eliminators for a variety of hand-held radios. These volidge regulators allow coniinuous operation of himdie-tatKies wnhout nicad dralp or radio modification. The eliminators plud n'ty an iutomoblle cigarette lighlor ind provide a regulated voltage supply tor Icom, Kenwood, Yaesu, Wilson. Tempo and other brands. Constructed on gJa& ap ix> circuit hnards from igri-quaiily components, Handi-Te* regulators sport ample heat sinking and a sturdy...

Bash

I have enjoyed reading 73 and ( honesTiy tteiii ve 3hat 73 has t e best arthCtes on building of any of ihe amateur publications on ine martial Tr e columns a - wrilten n ms and even though i don't have me opporiunily to bulltd alt (hat much. I usually read and enjoy the material vary much .it is fun just to read It, i rn-.itt irsost of your editorials und must admit that you certainly put forth a great oea' 0f effort to make for tniefesting read < ng J gu- ss you coutf say that vou call the...

Bigfoot Gringo

Wayne you your wife sum ve< 7 an Odyssey through Colombia and the tar-racudas who besieged you at the street zomers that ten as terminals fo* intercity Puses in Bairanquina and Cartagena' I have been to the same comers looking for the same bus services as you did and fully agree wiih you regarding the ihcy cusa& le conditions ai and around tho-jL-spots However, 1 must address and com men3 on some ol (tie other concepts eX' pressed by you. i) Poverry Yes Colombia is poor How ever, not...

Braintree Ma

The South Shore Amateur Radio Oub of Bramtree MA will hold an indoor flea narkel Sur jay. April 17, 1963. or shine, from 1V00 am to4.00 pm afiheVk-m Club 4lOQinnoy Avenue B'dintree wa The entranc1 fee S S1 00 Tables (8-foot) are 10.00 oachr which includes one Iree admission, Vendors will be admitted at 10 00 am and iher will be plenty of free parking. For advance ab-e reservations, send a check payable to the South Shore Amaieur Radio Club lo Ed Dotieiy W1 MPT, 236 Wi id-*vood a stenue -a.-iir...

Carf Phone Commonwealth Contest

Starts 1200 GMT April 9 Ends 1200 GMT April 10 This contest Is open to amateurs in all countries ot the Commonwealth of Nations. Entrants may work other amateurs in the Commonweailft using SSS only, on SO- through t& meter bands- Work only stations outssde your own call area. Each station may be worked once on each band, There is one entry.cla s for slngfj& -operatof stations in all- or single-band classes. 3600, 3760. 7080, t4l30, 21200, 28480 plus or minus 20 kHz. Each completed contact...

Consoles

Box 5103 Tacoma, WA 98405 (206)272-0713 on 2 Meter Handhelds with this MFJ VHF Converter. New MFJ VHF converter turns your synthesized scanning 2 meter handheld into a hot Police Fire Weaiher band scanner 144-148 MHz handhelds receive Police Fire or 154-158 MHz with direct frequency readout. Hear N0AA weather, maritime coastal plus more on 160-164 MHz. Mounts between handheld and rubber ducky Feedthru allows simultaneous scanning of both 2 meters and Police Fire bands. Mo missed calls....

Circulation Manager

PUfSCi* MMBift t UU SALES MANAGER Japan in technology. Sure, we're outproducing them' in lawyers by about the same numbers as they are outdoing us in engi* neers and technicians. Perhaps we're going to sue for technology. I received a letter from a major ham deater in New Zealand in re* sponse to my editorial suggesting that there is need for more engineers and technicians if we are ever going to regain our amateur radio equipment (and other consumer electronic equipment) sales. Of course I...

Clock Kits

Your old favorites are her again Over 7,000 Sold to Ootr Be on* ol (he gang and order youri lodiyl Try your hand at building the finest looking clock on the market tls satin finish anodiied aluminum case looks great anywhere, while six 4M LED digits provide a highly readable display This ts a complete hit no extras needrd and t only takes t-2 hours to assemble Vour chorce case colors silver gold btack ispecify Clock kit, 12 24 hour. DC-5 124.95 Clock w.lh TO mm ID limer 12 24 hour DC-iQ 29.95...

Components

A THt EOLJHCE ftt RfcTlCUU Oniutrsal AcIimD Fillers NEW R5fi 0 d , '-s l jfiranrn ed - wi it ma c spare n ir ill Is t ' -B 5 5 E 71 cM ftstfto* prflflrammed SCF S 6 51 i fti.lMOf pr ii fiiflinieo5CF t11 'J1' OPTnELECTR0WC& I HI1SUBI5HI gild SIEMfctJS CW LASER mODt . HlfiH OUTPUT 1RLEDS. CAL PIN PHOTO UDDtS. FE0ER OPTIdS. MORE MRFIDI SulfsmutE 2SC2A7B F - & 1 HFCM535d recUE(fl5temcnt piemen -. Kj 7j__L LEAPLE5SPESKCAPS inn 220 63t lOOUpf_ HltflOWAVE CHIP CAPS Ver ftw ITRAWQN I3 00 Sfeirtl...

Computer For Less

Combine I O board (a 59,95 with Sinclair Computer 99 95 which will provide you with hardware for the following applications, Control satellite tracking equipment Rec 4 xmlt RTTY ft morse code Automatic contesi duplication Gheel Repeater controller FEATURING Parallel f Q po*t (ejpanaabisi 90 day arrani , i o Board with our Real Time clock calendar Ttnr _Momrt_Paia_Taar_P*> o' Week * Touch Tone '-J ode' iec aej

Cook Books

TTL COOKBOOK hy Don Lancaster Explains what TTLia( now it works and how i use il Discusses prac-UcaJ appiica tons such as t digital cour ior and display system, evenls counter electronic Stopwatch fjigita voiim ter d d a digital (achometer BK 1063 S9 50.' CMOS COOKBOOK-i y I 1- La casre Deta s the applrcation of CMOS Ihe powef icgiC family sui r aD - for ir st sppiiCrt ons presently d -minatei V-, TTL Required reading for evefy serious digital experimenter ' Bkidu S10 50 * TVT COOKBOOK Py Don...

Cowing Zl Happenings

World Communications Year, 1993 New Zealand Activity Day. 0000 GMT to 2400 GMT. May 21 the Council of NZART has designated this 24-hour per tod as our ma n activity for WCY ZLoperaio'S will tie active on a'j bands and modes for the 2+hour period to ensure that New Zealand does its bit toward WCY. Special cahsigns will be used ror WCY Activity Day ZLIand has been divided tnio a regions, and each regional coordinator na been allotted a WCY caElsign for use by ihe stations operating Jn iheir...

Datak

-HT-i. < L IS AVA I L - L.i. *5 Ofl M C r 3 IC3 Pcrr sori IT - IT12 IT. ' -HT-i. < L IS AVA I L - L.i. *5 Ofl M C r 3 IC3 Pcrr sori IT - IT12 IT. ' CClHT UISS OLn F9 J CATALOG- * 1 T> 1 cr. EH 1130 TEW St s HCrLifi*flLL an F I trST ORDCR J TOR OUR CATALOG CH SCW A Two STAMPS Ft OUR FREE FLYER

Fcc News

The FCC h s paved (he way for increased use of experimental digital codes on VHF .ind relaxed restrictions or ASCII and Baudot transmissions. 111 the i ecen I (iecJslonh l he Conlmlssion mi rhorized ASCII up to 56 ki lobaud wil h a bandwidth to lOOkH on ell frequencies above220 MHz. Between 50 and 220 MHz ihti maximum speod is 19.6 kilobaud. and there is no bandwidth feslriction. In addll lorv experimental codes with a bandwidth of up to 20 kHz are now per mi led on Ihe frequencies between 50...

Day Free Trial Yaesu Heath Drake Collins Kenwood

Fliami FRCfluiULV WSPUWJ, wn* nn c., OFFSET i ruiuM 5 8* REU LED'S bOlfl TO 10 Hi, I in- tilCH ' 4 . - rf. IW ADI 10tt)'3 PlUE IMi' IIil 1 .SACK' J* 1 It RAO USf ffm tEaiEi.lTSDJpFTM A, TfMMOPlM jm* tilfiM FTD*iro iL w. ro. sbioq-1 i2 i M0-3DJ. Ml HM A KMC* OK MD Off SWITCH.----ft 130 Q tt& ois or imo woru miuuti - mu m to petals, ILL nfc V * OF CStWt I fLfM UH VDV Film iEiiFi. inti ft tt U* l. JKLjfTtif tf TOD SAT UlL. UR1TE RU inHMMTI II A PVICES OH Cw IE OF GBBAL CffrtMW S Ht*STZEie. TOTl...

Dayton Oh Apr Mmay

Thij Day Ion Amat ui Radio Assoclallon Inc will sponsor me Dayton Harrwnnttori on April 30-May 1. al the Hara Arena and Exhibition Center. Oayion OH Admis sion is S.'OO I ft advance and S9 00 it the door .vaird for alF 3daysj Rea-marfcet space is 15.00 in advance and S16 00 al 1 he < ioor Olfier features win include forums, new products, f hlblls women's ac iv bes, awards, and spuu l group meetings. Fur special mole rams afld reservations rii> > lo Hamvention Housing, 14 6 Third Nation a...

Hgy

2) The son of which forme* president of the United States was president of the ARHL in 19647 3) Franklin Roosevelt 4 Warrert Harding 3) What city played hosi to the 1954 ARRL National Convention 4) Amateur radio played a vital roie (some say It was ham radio's finest hour during hri& 1964 earthquake. Pick the disaster's location. 5) During 1964. re FCC began entging amateur radro license fees How much did ft cost back then to take an examination or renew a ticket 1) 1 he callsign of the...

Electronics

Culver City, CA 90230 (213) 390-8003 1 800 882-1343 -See L i Si of Aovemsers on page 174 If it were not for an inventive ham, E.T. might still be trying. In this exclusive article, the designer of the little guys communicator unveils its inner workings. Henn tf Feinterg K 5SQ 4T5 d5r r Srreef Neu VorA N> 10029 iTGJF 'I thought as I reI turned from lunch to my office in the exhibit department of Dell Labs. Lying on top of my desk on top of a pile of exhibit plans was a...

File Rack Insulator

BETWE EN-CONN ECTOR SERIES ADAPTER A BNC female (UG-625) fits nicely in a UHF male (PL-259). Just solder a wire to the BNC center and insert it in the body of the PL-259. Solder the center conductor and the seam between the bodies. With just a little more difficulty, an 0-239 can be attached to a BNC male (UG-88). An F'-type female will thread directly into a BNC male. SMA to BNC (both ways) can be done just as eas-ily. Bob Raker WB8ZFF, Cincinnati OH.

For Tollfree Ordering Call

WAYNE GREEN BOOKS*PETERBOROUGH NH 03458 Itemise your order on 9 separate piece of pap< jr and mail to Wayne Green Books, AU Sales, Verttrough. NH 0,145ft. Be sure tn include cheek or dcttiled eredtt card Inform adon. (Visii, MC or AM MX accepted.) No COD- rders uc itetl. AU orders add ihSG four the firti hook, postage u r J handling 11 (Xlench addition j bimfci 10.00 per book foreign air mail. Please alVw 4-0 wecki Jtfi r pubHoation for delivery Quest lorn regnrdin your ordeal Please write tn...

For The Contester

Ects for building test equipment to work with your ham station and In servicing digital equipment P us a cum.j at ve index for an four volumes for the 73 TEST EQUIPMENT LIBRARY LB7j& Si 06 ALL THREE OF THE ABOVE ONLY 4,95 ORDER LB7365 RF AND DIGITAL TEST EQUIPMENT YOU CAN BUILD BK1Q44 Rtbursth function, square wave generators, variable length pulse generators 100 iHz marker, i f and rf sweep generators, audio osc. affrt sig* rial injector 146 MHz synthesizer, digital readouts for counters,...

From

A Satellite Tracking Package For The Apple It Plus u Has 3 world AND a LJS map and can print BOTH on your tpson NX printer Tracks in real time w o a clock. SYSTEM REQUIREMENTS Apple II Plus 48K RAM, OOS 3 3 THESE EAS> TO USE AND UNDERSTAND PACKAGES ENABLE YOU TO (1) Track circular orbit satellites in real time on a world mao. (2 Print all aia tafres on your printer. (3) Rapidly predict iccessrfcie Droits. reterence or-Dris anti aii orDits between your specified dates (4) Rapidly compute AOS...

Fun

John Edwards KI2U 78-56 86th Street Glendale NY 11385 Do you know what tMe Wireless Operators Memorial is No, it's not a monument dedicated to those who died while waiting to make a contact off of a DX list. It you're ever in New York, you might want to make a trip to Battery Park to viewone of the Big Apple's ieast-vrsit-ed tourist attractions. A granite column with bronze plaques listing the names of 48 radio operators who went down with their ships while faithfully sending out distress...

Fully Assembled M

HAL-PA-2,1 GHi2STAGE PRE AMPLIFIER, DESIGNED FOR23G4 DOWN CON ERTER MADE 70PIGGIE BACKON THE2304 BOARD OFFERS 20 dB GAIN ALSO HAS AN IM AGE REJECTION FiLTER SHlPPfNG INFORMATION ORDERS OVER .VILL SE Shipped POST PAiD EXCEPT ON ITEMS HERE ADDITIONAL CHARGES ARE REQUESTED ON ORDERS LESS THAN please include additional u sc for handu Q and ma lfng charges SEND STAMP FOP FREE FLVEH j * _ * TAC-L -q P.O. BOX 1101 SOUTHGATE, MICH, 48195 PHONE (313) 285-1782

Fuse

Fig Po er buppl P( board (component side) mounted on the trace side > ou should make sure that the 7805 supplies at least 5 V. It u does notr the relays will not operate correctly* If a heavy-duty motor is used, the 3-ftimp relays may not be heavy enough, so heavier relays might have lo be substituted on a separate mounting If a > ermanent-magnet-type motor is used, it would be conne< ted in place ot the starting coil A 4 drill is used tor the relays, and a 55 for the bridge rectifier and...

Greenville Sc Apr May I

The Blue Ridge Amataur Radio Society wrll hold Ihe Greenvtiie Hamfesl on Satur day and Sunday ApnJ 30-Uav 1, 1303. ar the American Legion Fairgrounds, White HorsaRoadH v3 mWa north of I -36 G'eenviile SC. A'.lrrnsston will be 33.00 Fnr advance ii les wrileMrs. SueChism, Rl 6,203 Lafte-woofJ Drive, GrfjenvilleSG 2960 Talk m on 146.01 61 and 223.46 22 .06 For further In-tormetlon, wrtte Phif Multins WD4KTG, Hamfest Chairman, PO Bo* 99. Simpson* vrNe SC 9601

Guam

We have a popular I-snirt here thai leads WHEREINTHEHELLISGUAM That s a lair question, and the answer to 11 sei> ms like a good way to begin 1 his column ijbout our island. For you geographers, Guam is located al 13D28' north and 144*45' east. R> r ih of Jsh that translates a& roughly 3600 miltrs west of Honolulu, 1500 milos east of Manila. 1500 miles south ol Tokyo, and 6000 miles wes of Los Angeles M is ihr-larcrest island connecterl with the US gov-ernmenl between Hawaii and (he...

Hal

DS3100 MPT ST6000 2,825.00 CT210Q KB2100 , , 829.00 RS2t00 TH7 DXS 7EL Tribander r 369,00 TH5 MK2S 5EL TH3 MK3S 3 EL Tribander 219 00 4028AS 2EL 40 Meter Beam 199.00 66BS6EL 6 Meter Beam 109.00 18HTS 80-10 Meter Vertical . > 339 00 V2S 2 Meter 5 8 Wave 2M Mag Mt 20.00 CD45 8,5 sq. ft. Ham IV 15 sq, ft Rotator 195,00 T2X 20 sq. ft. Rotator. . , 249.00 HDR300 25 sq. ft. Rotator 435.00 Free Shipping on all crank-up towers We Havs Alt the Great (COM Transceivers In Stock 72QAT 740, 730, Call...

Handbook

EVERYTHING YOU ALWAYS WANTED TO KNOW ABOUT AMATEUR TELEVISION, but were afraid to aakl By Mike Stone WBiJQCD. This book is a complete guide to setting up your own amateur radio television station, it contains A history, what equipment you need, video iheory, cameras, recorders, lighting, special kTV DXin ATV groups, building projects, lest oqulpment, dealer directory, a cumulative Index of over 1000 articles on amateur TV and much more. This la Ihe new. 19B2 edition From the pubtlshers ol...

Hcdc

350MC Prescaler divide by 10 11 350MC Prescaierdivi e by 5 6 650MCPfescalerdivide by 10H T 650MC Prescatef divide Dy 5 6 UHF Prescaler 750MC D Type Flip Flop 1GHz Counter Divide by 4 (Regular price 75.0Q) High Speed Dual 5 4 Input NO NOR Gate Presettabte High Speed Deca e'Binary Counter used me 11C90 91 or the 95H9 91 Prescaler can divide by 100 (Signet ics This is the same as a Motorola MC4024 43Z4 Dual TIL Voltage Control Multivibrator This chip is the same as a Motorola MC4044M344 Phase...

Ham Iv

Full details a Letter Amateur Jeulcn, ur write tfitt A* - rwt W. S JL* Jl,* l. W H Wfr mTr CH' t 11 jn7i Wra hstoi lUulWiFrvn TH5Mk2 Now yoL can enjoy outstanding broadband antenna performance in a size to fit most city lots With 5 elements on a 19 ft. (5.8 m boom, the TH5J k2 has 4 active elements on each band Hy-Q traps and monoband paras c elements achieve an 8 5dB gain and an average front-to-back ratio of 19 dB on 20 and 10 meters, and 22 dB on 15 meters. VSWR is less than 2 1 over the...

Hirizer Antenna

Com-Rad Industries is introducing an etren lower profile version of their popular Hi Ri er esiricted-space anienna The height has been reduced from 20 to 15 inches to enable the portable Nxed antenna to be operated mobile' -iO through tO meters re obtainable by the use of a 5-inch-diam-eter magnetic conneclion base or a vice-grip connection base with large metal surfaces such as automobiles, baCcony rails, otc. A portable cylinder ground-plane sys- iyrn Is available for use where metal sur-...

Hr

430pf 470pf jjlOpf 560pf 620pf 680pf 820pf 10 for 7.50 100 for 65.00 1000 for 350,00 WATKIMS JOHNSON klJ-V907 Voltage Controlled Microwave Oscillator 110,00 Frequency range 3.6 to 4.2GHz, Power ouput, Min. 1OdBm typical, 3dBm Guaranteed, Spurious output suppression Harmonic (nf0)s min. 2OdB typical, In-Band Non-Harmonic, min. 60dB typical, Residual FM, pk to pks Max. SKHz* pushing factor, Max, 8KHz V, Pulling figure (1.5 1 VSWR), Max. 60MHz, Tuning voltage range +1 to + 5vo1ts, Tuning current,...

Hf Mobiles Deliver Fixed Station Performance

Hustler HF antennas deliver outstanding sigrat reports -wherever your mobile Destgn your own HF mobile from a full selection of top- I quality US -made stainless I steel ball mounts, quick disconnects, masts- springs, and resonators. You can cover any II 6-to-& Omet r band- Choose U from medium or high power f resonators with broadest bandwidth and lowest SWR for optimum performance on any band Easy band change and garaging witn Hustler's fold-ever mast. too. Ask any ham the best HF mobiles...

Odf

CODE tAPE-13 I WPWI COP TAP -20i WPM I. OQ < yVPX f. OOE r PEJ5 M4 < I l JUH *tlLm. INF L- 0IWIPLF1 - SHOfftWAVt ,-tTEMEWS HANDBOOK S iEft Ih COMTEST COC- aOC' I 5 HXJ Ji-VrAn , .a',- tU 'O rfNOVVAaOUTMfJLTEUHTV I TjtoympiiC Mottos* i c FH NEW HOeflVtOumTERS iJJJ 'Ht HEVVW A HtH SATEtUT HANDBOOK 5 b NO'JiCE TkEGR-r 1 AF4 HM1M- r HT PflACtlCALHANOBOOK Ol F M Ii K J ) F'HOt'Mj riOH WIZARD i HA NU 1.1 il 0Uli. (kAHP'-. SIIYI f W . -Iii ' > 'i Uit -itTLt > .-.--1 M r Qf OBO C IL CA E -BT*LE...

Hra

For yearsr Hamtronics 1 Modules have been used by individual hams and manufacturers to make repeatersi Now, in the Hamtronics tradition of top quality and superb value, we are proud to offer a complete repeater package. SENSITIVITY SECOND TO NONE TYPICALLY 0.15 uV ON VHFt 0.2 uV ON (JHR SELECTIVITY THAT CANT BE BEAT BOTH 8 POLE CRYSTAL FILTER & CERAMIC FILTER FOR GREATER THAN 100 dB AT 12KHZ. HELICAL RESONATOR FRONT ENDS. SEE R144, R220, AND R451 SPECS IN RECEIVER AD BELOW. OTHER GREAT...

Fiz

Used two mechanical switches (one I or the east one f or the west) that will open if the dish turns too far. These switches are connected in the ground return of the holding relay and are con-net ted M lili on the power-supply board. If the switches are not used, R and B should be connected with jumper wires also have two other mechanical switches in the ac line which open in case the other switches fail Pot 1 at the dish is installed so that it turns with the dish, and it will not be turned...

Icf W Band Portable World Receiver

The Best Under 1,000,00.,.WRTV Handbook We have a limited number of Uctory -lemQ ICF-6B00W s. rhei arc- belr q offered ar a saving oi iBQ.Q< J ov r lh* price ol r w models These units weia u ed by SONY sales People at Trade Shows, and are still fn mini condition, ft*, full i year SONY warrants ir> < & to in force This is a super deaf, and is noi available Fmiri any other rieai i in the U.S.A. -e y-1altf'r VOX PORTABLE TRANSCEIVER la.it . * T 'V V h t Jl itDi-HVO if Off

Wnl

5 1 50 for shipping and handling Send ro Wayne Green Inc Attn Book Sales Peterborough, NH 03458 A Wayne Green Publication Dealer Inquiries invited YES, i want to scrounge 334B6L Send me_copies of LIVING ON A SHOESTRING Enclosed is 7.97 (BK7 393) per copy plus Si.50 shipping and handling, Let us know 8 weeks in advance so that you won't miss a single issue of 73 Magazine. Attach > ld label where indicated and print new address in space provided. Also include your mailing label whenever you...

Icom

ICOM Am rica,Inc 2112-11 tin Ave NE, DeHevue, WA 96004(206)454-6155 3331 Towrwood Drive, Sui e307, Dallos 7X 75234(214)620-2760 All rored speciheonons are opproxinnorie and subjea ro change thout rxs ice or obttgq on AJI KEQM rodlas sign fianit y exce d FCC regulorions iiminng spunous e-Tii on-i The fCQM IC-740 offers features found only on the best amateur equipment and performance second to none. The IC-740 is built to withstand strong adjacent signals and still maintain sensitivity and...

Ihtroductorv Special

DISK VERSJON S1& 9& Q CASSETTE VERSION II O CASSETTE aief upgrsdE lOlSK S20 00 Guaranv c nc A at jr CALLSlGN POST FAlD RG214U dbl silver shield, 50 ohm Si .3& rft. 100 M RGBU with PL 259 on e ch end St9 95 BELOEN Coax in 100 ft relis Grounding strap, heavy duly tubular braid 3 16 in. tinned cppp r lO tl.

Ecj

115 VAC supply bulH- Auxiliary Notch re- Four main filter in. Filter by passed jects GO to 11,000 Hz modes lor any QRM when off. Covers signals othar situation, Model QF-1A For SSB & CW 69.00 (+ 4) Continuously varl- Continuously variable main selectivity able main frequency. (Id an incredible 20 250 to 2500 Hi) Hz ) ALfTEK inon red the ACTIVE AUDIO FILTER back in 1972 Today, we're still IheenQineenng leader. Our wew OF 1A is ihe latest exampie. n's INFINITELY VARIABLE You viiry seiectivity...

Kong Kong Awards

Applicant must sub-mlt ve i'ied e-idence ot two-way contact with other amateur stations located on the 22nd parallel ot latitude nofth (see list) A Hong Kong stdtion contact is obligatory. Only contacts after i si January 1960 are valid Endorsements tor mode and band may be requested The award Is available In ihree cfasses. Class 3 contacts with at least 16 countries. Class 2 contacts with at least 20 countries, and Class 1 contacts with all 25 countries. Fee USi 00 or...

Mfj

Up to 3 KW PEP and it matches any feedline, 1 8 30 MHz, coax, balanced or random. 10 amp AF ammeter assures max. power at mm SWR SWR Wattmeter, for. ref 2000 200W 19 position dual inductor, ceramic switch 7 pos. ant. switch 250 pi 6KV cap. 5x14x14 300 watt dummy load. 4 1 lernte balun. 3 MORE 3 KW MODELS MFJ-9B1, 239 95 ( f 10), like 984 less ant, switch, ammeter MFJ-982. S239*95 ( + 510), like 984 Jess am meter, SWA Wattmeter, MFJ 980, 209,95 ( + t0), like 902 fess ant. switch. Flexible...

More

Inductor-capacitor alternator-whine filter, mobile rigs, but it has almost identical causes. The noise present on mobile signals usually sounds like a whine and can easily be traced to the car's alternator. I have found that alternator whine is a comm only-en countered problem, and it is sometimes very difficult to suppress. Over the years, I have discovered several methods of dealing with this problem. One of them should work for you. The automobile alternator generates alternating...

More Convenience

This perfection-packed kit has many benefits. A unique duai-speed tuning system can extract new QSOs or fly through a band in 1 kHz increments with 50 Hz resolution Split-Memory Access lets you review and change the transmit frequency while in receive. without mtssing a Single word or fragment of code. With it, you can beat the QRM every time. Essential vox and sidetone controls are located behind the front panel namepiate. Seven mode and function symbols confirm transceiver status at a glance....