Amateur Center

When ri comes to FAST DELIVERY HONEST DEALING and PROMPT DEPENDABLE S-E R-V-l C-E back-up We don t just advertise WE GIVE IT1 In 1937, Stan Burgnarat (Wyjil), oecause of his intense imeres in amateur radio, began selling and servicing amateur radio equipment in conjunction with his radio parts business. We stand proud of this long-tasting tradition of Honest DealingT Quatity Products and Dependabte S-E-R-V-l-C-E l Above altT we fully intend to carry on this proud tradition with even more new...

Info

Technical support line. (813) 874-2980 MODEM CARD - Add on internal modem card for TNC-2 and clones, and ail PacCornm TNCs 99.95 fully tested and ready to install (Avail Now) EXTERNAL MODEM - Encased 9600 baud modem with Ironl panel LED displays and cabling far most popular packet controllers including the pK-232 HIGH SPEED DIGITAL RADEO Digital transceiver consisting of digital -5 watt RF deck and 9600 baud modem 329.9S to 399.95 iAvail in May) COMPLETE HIGH 5PEE0 PACKET UNIT - Inlegrafed...

Circle Oh Reader Service Card

Tne 'nam 10 ten mererantenna Is designees and manufactured by American Antenna makers of tne woriQ famous K40Antenna witn a power handling capacity of tsoo watts and a band width of 1 S mnz Derween 2 t Swff potnts the *ham 10* is trie perfect com pll me nt to all single-band ten merer rigs me stainless steel pase of trie HAM 10' Is suppfJed with an adjustable trunk lip mount. Also available Is an optional adaptable heavy duty magnamount. For a free brochure, call 1-800-333-6768 in handles...

Only

R144 A220 FM RECEIVERS for 2M, l'ff SFT Ir-1 150-174, or 220 MHz. GaAsFET filters plus helical resonator selectivity > IDK& dB at x 12kHz I best avaiiabie anywhere)1 Flutter-proof squelch. AFC tracks R451 UHF FM RCVR, Similar to above. Tuned line front end, (& .25uV sens. 0. luV with optional hel, res. preamp). Kit 149. w t 229, R901 FM RCVR FOR 900 MHZ. Triple-conversion, GaAs FFT front end, 0,2uV sens Kit 169, w t 259. R76 ECONOMY VHF FM RCVR for 10M,6M,2M, 220. Without hel resorafc....

Rcsv For Special Applications

Selects up to five antennas Loss at ISO MHz less than 1 dB VSWR under 1 2 to 1 DC to 250 MHz. Impedance 50 ohms Power capability 5 kW below 30 MHz, 1 kW at ISO MHz. Available at vour dealer. Send for a catalog of the complete AMERITRON line. 2375 Dorr Street Toledo, OH 43607 For more information (601) 323-9715 echnical inquiries (419) 531-3024 AMATEUR SOFTWARE FOR YOUR BM PC XT AT PS2 ANO COMPATISLES. SATRACK A very simple to use satellite tracker Will display A2-EIL for up to 10 sate 'es in...

Glossary

DX for the HF bands is typically transcontinental ERP The power measure of the wave energy that radiates from an antenna that is the product of the input power into the antenna system and the net gain of the antenna system. Full-gallon Ham jargon for a kilowatt of output power. HF High Frequency Refers to the 80-10 meter (3-30 MHz) bands, 160 meters (1.6-2,0 MHz) is US Amateur Radio's only Medium Frequency (MF) band. Linear Amp Short for linear amplifier This...

Tha

The new TH-75A Dual Band HT from Kenwood is here now Many of the award-winning features in our dual band mobile transceivers are designed into one hand-held package. Dual Watch function allows you to monitor both bands at the same time. 1,5 watts on 2 meters and 70cm 5 watts when operated on 12 VDC or PB-8 battery pack). Large dual multi-function LCD display. 10 memory channels for each band stores frequency, CTCSS. repeater off seth frequency step information, and reverse. A lithium battery...

Get Your Bearings Straight

At last A map dedicated to the radio amateur, Announong the Azimuth-Equidistant wall map from It he Great Circle Map Co, An azimuth nap provides information about heading and ran e lo any pjace on Earth Mo longer * ill you ha eto guess at *hich way to aim your beam antenna for hat rare DX Each map is specially drawn with youi nation at the exact center The rest of the world is spread out around you. To use the map simph find ihe large station and read the compass heading from the border or the...

And Coiweout This En

E THAT 0 T4 l A A EAT GfKK' E) E THAT 0 T4 l A A EAT GfKK' E) Figure 6. Details on winding toroidal coils. The doubly-balanced (Figure 3 is reproduced here. 24 73 Amateur Radio * June. 1989 09,16,20,2 T .28. 32,38,42,43 Q.ljjF C11.12,14,17,19,24,25,41 0.01 iF Cl ,3.5,6,7 SEE TABLE 2, FREQUENCY DEPENDENT VALUES

Packet Radio

Cuminn.tDM m iPBpaclrat raoiolnlttrliitii Uhts lamouiUnrni, OHQicom rtw i Jaimits tXWtIt i hip lor nibble HF pr VHF lam'nci*. An FHfE dj& k aottware PC board .illhr. eiiarv JnI iml iuli 0.'umenlnuh S T dpr ib -. uft SL-'- 'iai*-. piwe i UIL tEf rn varactor tLW CHMrtaaiA.OWWKriiikfi *r deaictRmttmoai rytfi Afbtuuctih lAttAlut > rufttt-i9Vbaftr> J R,rEKj plt-I- iflS CJH *iri -t yaac s antf b sJ-. 'rtrj *-tftt piO < les iortf IM* . __ __ '

We

KEEPING w I HIN M4XIMUM VOLTAGE CHARACTERISTICS AhO A SPECIFIC GATE-TU-source VOLTAGE, THE OHAIN CURRENT WILL REMAIN A1 ITS SETTING DESPITE LARGE . ARifrTiofiS IN DRAIN-TD-S0URCE VOLTAGES power by virtue of the increased voltage. The physical size of the linear power MOSFET amplifier is mainly related to the size of the heat sink. The one I prefer has four fins on each edge. 1 suggest that you write to American Electronics Co., 173 E. Broadway* Ft jfure J fnput po 1 cr to output power charr for...

Amateur Radio

*.> nhrtadir . - taub dicetptnerh td and ifK- ftvL pul um r t w Ji finit 11 c yu nie tn -The Becjinnfrr'fl Handbookof Ampleur Radi - 2nd Ed thon by ( lay t *sirr Cnmbinft lhet*ry und prauiKV in an cn y m jl r-ni.hul 'uriii.tl inj pmvidci minr-nijih> n Nu ifo rhg and instj lin rvtip i i iwh jikI luihnniri'M, men , trammiMkn lino. und rcv equipment 400 291 - RTT Y Today by Darr Ingram K4 TWJ Ihc new LirmI only tip-KHlate R Tl V t* k in CAtsItffKC Covers Jt 1 in. ci-n of RTI V H rn jraJ Home C...

Part II

FO-12 PSK Packer Radio Mademi This uses regular CMOS TIL chips and no hard-to-getparrs, This modem is used with the FO-12 flying BBS and AMSA T-NA ' forthcoming MicroSats PSK modems are also used for PSK packet e xperiments terrestrially, through OSCAR-IS 's voice transponder T and even meteor scalier. Pan I o this article, fin the May 89 issue of 7J covered telemetry info on OSCAR-9 ( UoSAT-1 ), OSCAR- 1 1 (UoSAT 2), and OSCAR-13 (P3C). This final part covers telemetry info on...

Ftr Series Mobiles That Double As Answering Machines

Let the 2-meter FT-212R and 440-MHz FT-712R take messages while you're away (with DVS-1 option) 45-watt output (35W on 440 MHz). Built-in PL encode decode. 18 memories. Auto repeater shift. Scanning routines. Offset tuning from any memory channel. Extended receive. Audible command verification. High low power switch. Oversize amber display. Choice of optional mic. More. FT-4700RH. DUAL-BAND PERFORMANCE, REMOTE-HEAD DESIGN. Mount the FT-4700RH almost anywhere the brains on your dash, visor, or...

Mfj

Mfj 1701 Antenna Swith

You can create an artificial RF ground and eliminate RF bites, feedback, TVI and RFI when you let the MFJ-931 resonate a random length of wire and turn it into a tuned counterpoise. MFJ-931 also lets you electrically place 3 far away RF ground directly at youf rig - no matter how far away it is -by tuning out the reactance of your ground connection wire. 7V2x3Vzx7 in. Now you can quickly optimize your antenna for peak performance with this portable, totally seif contained antenna bridge. No...

Dunellen Nj June

The Raritan Vaiiey Radio Club will hold ils 18th annual Hamfest at Columbia Park, Sefl-ersr S6 per space or S12 for multiple spaces. Mo tables supplied. Buyers* 34 admission, spouse and family free. Door prizes. Talk-In on I he cfub repeater, W2QW R 146.025 .625 and 146.52 simplex. Dave KA2T M, (201) 763-4849 or John WA2Cat(201) 968-5070. The Independent Repeater Association is spon so ring i Is a nnu ai Ha mfesi at the N at ion ai Guard Armory. Free tables for dealers and sellers. Reserve...

June

The Hail of Science ARC Hamfest will be at the New York Halt of Science parking lot, Flushing Meadow Park, in Queens. Amateur radio exhibit station, lune-up clinic, Films, free parking, door prizes, commercial dealers. S3 admission. Sellers. 5 per space. Tafk-in on 144 300 simplex link 223.600 repeal and 445 225 repeat. Call at night Stove Gr& en-baorn WB2KDG, (718) 898-5599 or Arnie Schiffman WB2YXB. (718)343-0172. The Chelsea ARC. Inc is sponsoring its Swap *N Shop at the Fair Grounds....

Communications Electronics

Bo* 10-4 5 1 Ann Arbor, Michigan 106-10+15 U.S.A. For orders call 313-973-0B8G or FAX 31 3-971-6000 tor. An RF gain control prevents overload of the detector. The delected signal passes through a filter network which removes RF from the audio. The audio output stage has a choke in the plate circuit which should be as large as possible when used with phones. You could use an audio output transforme with a speaker, instead. The IF transformers are really no problem to build. The coils are...

Carolina Win

- CM Use transmatch 132 overall Mirtchin XFMR Line Isolator Vert Radiator Coan fed Assembled 69 95 performance Proven Results 70 Seam Pawl Toaworfd Oi WW Kjeai Andcicfpl'on HF wirr sntpfirtni Full rarSfl of HF, VHF nLfir> iJe QnienrtDs, ducksr wire, conn, piirts. Iirre, iCc SlDfiB Contact Jtm. W4THU-fr discount catil Siiwl 11 Tof t4l4g by 1st CIjs m.nl 615 , Portsmouth, vX 23703 Otatif Inquifiei w*komei

Mart Patch

CES- imple* Aulopatch- WiJl Patch FM Transceiver To Your Telephone Grear For Teitip one Can From Motuu to Base j nnple To Use- 510SA 5l0SAIf TS44 S AT. R-5000 R-2000, TS-940 S AT, TM 231 U431A. TM-2570A 5DA 30A, TR-751A, Kenwood Service Repair, TM-721A, TS-711 ailA, TM3530A. TH205AT. TH215A, TM-621A, TM-321 A, TS140S. TS60OS, RZ-1. TS-790A. Budwig ANT, Products NELTECH DVK-100 Digital Voice Keyer FLUKE 77, G3.85.87 Multimeters Media Mentors Amafeur Radio Course VoCom Mirage Aiinco Tokyo...

D

L1 See TABLE 2 FREQUENCY DEPENDENT VALUES L2 101 u rns, 26 w ire on FT-37-43 toroi d L3-6 See TABLE 2 FREQUENCY DEPENDENT VALUES 35 iF a if variable, panel-mounted 15pF trimmer 5-50 pF trimmer, PC-mount 33 pF 1 tfF lOOpF electrolytic 47pF electrolytic 0.33pF 10 jF eieciroiylic 33 pF 270 pF 100k 100Q 10k 150Q Ik

Avcom

Avcom introduces a new portable spectrum analyzer, the model PSA-65A, which covers frequencies through 1000 MHz in one sweep with a sensitivity greater than -90 dBm at narrow spans. The light-weight PSA-65A, battery or line powered, was designed for 2-way radio, cellular, cable, LAN, surveillance, educational, production, and research and development work. tenders for Satcom and higher frequencies, audio demod for monitoring, log periodic antennas, carrying case (AVSAC), and more. Size 11 w x...

Alsoa Linear Amplifier

The AL-80A will provide a signal output that Is wtihln 1 2 U untt of the signal output of the most expensive amplifier on the market and at much tower cost The Amerrtron AL-80A combines tne economical 3-500Z with a heavy duty tank circuit to achieve nearly 70 efficiency from 160 to 15 meters it has wide frequency coverage for MARS and other authorized services Typicai drj e is 85 watts to give over lOOO watts PEP SSB and S50 watts CW W output A new R-L output circuit for SO and 160 gives +ul'...

L

IC-900A Transceiver controller with UX-29H 2m 45W and UX-39A 220 25V band units, UX 39A 220MHz 25W band unit UX-49A 440MHz 25V. band unit. , IC-1271A 10W L2GHz SSB FM acvr IC-320 A 25W2m 440 FM TTP (c o) Larsen PO-TiM Trunk-lip mount, Larsen PO-MM Magnetic mount RP-1210 i 2GHi 10W99ch FM tw

Available Options

100 Wan model . dcaJl for details Mic w Freq, Scan Buttons 30 00 SP-l Speech Processor 30.00 CW Auto break-in & pwr eontror 30.00 Service Manual AR3300 AR35QG 20 00 3 Element Beam, 26-30 MHz 89.95 Penetralor Mobile Ant 4795 Antron A-99 Vertical Base Art 49.95 RS7A Pwr Supply for 30W Ranger 52.95 RS35A Pwr Suppiy for 100W Ranger .142.95 sale price with radio purchase only Ofler Irmited to available stock Send a SASE for delated brochure Quantity Pricing Avattack Foreign Onfcn Atcaptad Order...

International

At last See box for the fist of current Hambassadorsr in alphabetical order by country. Where only a country is listedf we have a vacancy countries not listed at all have never had a Ham-bassador, and we will welcome volunteers. (Preference will be given to nationals of a country please give years and experience as a ham J Esperantist hams note Major S. N. Rai Deb Barrna (Retired), Krishnaloyf Vivekananda Sarani, Narendrapur-743 508, West Bengal, Indiai, expresses interest in the International...

Additional Features

USER PROGRAMMABLE CW ID DIAL ANY PRE-SELECTED NUMBER BY PRESSING THE MIC BUTTON FIVE TIMES. COMPLETE PATCH STATUS BEEPS FRONT PANEL STATUS LEDS HALF DUPLEX PRIVACY MODE (with beeps) SELECTABLE CONNECT CODE 1-5 DIGITS SELECTABLE TOLL OVERRIDE CODE 2-5 DIGITS SELECTABLE DISCONNECT CODE 1-5 DIGITS SELECTABLE TOLL RESTRICTION First digit lockout t Prefix lockout c Digit counting SELECTABLE ACTIVITY TIMEOUT TIMERS (Ringout alerts after pre-selected no. of rings) (Use your base radio from any...

Butternut Electronics Co

The entire run of 73 from October 1 960 through last year is available. You can have access to the treasures of 73 withaul several hundred pounds of bulky back issues. Our 24* fiche have 98 pages each and will tit in a card fiie on your desk. We offer a battery operated hand held viewer for 75, and a desk model for 200. Libraries have these readers. The coHection of over 600 microfiche, is available as an entire set, Cno partial sets) for Si80 ptus 5 for shipping (USA). Annuaf updates available...

Edited By Br Van Has Tings

The push for a no-code licence is gathering more steam. Citing their support from AMSAT, TAPR. and Goldwater, the South Coast Amateur Technical Group, a Mef* bourne, Florida ARC. filed with the FCC for the creation of a code-free entry- evel amateur license. The Apprentice Class'h ticket would replace the current Novice license. Apprentice licensees would have access to all modes and bands above 30 MHz and a full 1500 Watts maximum power output, but the f cense is good for only one 10-year,...

COM

THE COMMUNICATIONS SERVICE MONITOR THAT WOflKS HARDER FOR LESS. Introducing COM-3 Fhe now sef v ft mOfuror Unsigned by service lectini-cians lor spruce lect nicians H works harder for less giving you advanced testing capatuliliesata very affordable price FEATURES Direci entry keyboard with programmable memory Audio & trans m rier ir& iMSfj'. , (mule* LED gra fi frfr-quency-'eror devotion sp'ay * 0 1-K3 -D00 j- oulyut Fev j-s High receive sensitivity less two 5*jv 100 KH To 999 9995 MHz...

Circle On Reader Service Card

Last i A completely porte 2 metaT ihroe dienern EVta bop boa m Easy to tt up wih rw small parte t qm Lo* VSWR or+t *ntif* 2 metef band Gain equvabnt to a 4 Y agi Al I* ments and l* d Ine with BNC connector s or -nsKte a 3 ft boom An Kfejl murgency entonna, iucfcpackabto (18 o J. general held m with accessory mail Money b cii t nq fully sa isWd salt Lake Crty, UT B415 AM (aoi) 2r7 Z05

Bnbb

HUGE K1BV DX AWARDS DIRECTORY, complete rules for over 1015 certificates, 102 countries, 230 pages. 15,50 postpaid. Ted Melinosky, 525 Foster St., South Windsor CT 06074 2936. BNB835 HOME-BREW PROJECTS Lists for SASE, WB2EUF, Box 708, East Hampton NY 11937. BNB845 Barter N Buy advertising must pertain to ham radio products or services Individual (noncommercial) 50c per word 1,50 per word Prepayment required. Count only the words in the text. Your address is free. 73cannot verify advertising...

De Fsk Demodulator

Kits 99, W t 179. 2W X Wv * xtal oven options available. j E 150-174, 220 MHz. (V i . WMMW *T A 451 for uhf, ssk Jl SSy FCC type accepted for commercial bands. -U Call for latest information on 900 MHz transmitters. VHF & UHF AMPLIFIERS. For FMr SSBh ATV. Output from 10 to 50 Watts, Several models. Kits starting at 79.

Coupled

Here s a handy little device for 13cm enthusiasts. This allows a user to split the power of the precision LO input into two SOD equal power 2160 MHz non-interacting signal sources. Both outputs go to their respective receive and transmit mixers, which are independent of each other adapter, one of only several connectors that should be used at 2 GHz and above. Check also Sealectror Inc., 225 Hoyt St., Mamaroneck NY 10543. for microwave-band connectors. Parts L1 Sage3 d& wire* line R1 S0Q...

Ifferential

State, MS 39762 601-323-5869 800-647-1800 Price Class 240 Over the years, various configurations have appeared on the market and in magazine construction articles. Each was alleged to be an improvement over atl the others, Some may have been, but the majority just ptain worked, at least after a fashion. Antenna tuners can be thought of as variable transformers that compensate for differences between your antenna's actual RF impedance and the impedance your transceiver would...

Other Radios And Accessories

0C5SXLT T floarcat 10 channel scanner ., 1(4.95 3C70XLT T Bearcat 20 channel scanner SI 59 95 BCl 75XLT-T flearcal 16 Channel scanner S 1 56-95 R2060-T flegancy 60 channel scanner S149.95 TS2-T Regency 75 channel scanner 269-95 UC102< T ttflgertey VHF 2 ch. 1 Watt transceiver Si 14 95 8PS5-T ftuje'rey 16 amp reg powqr ftupply 5 9 95 BP205-TNi-Cad all_ pacKfor BC200 BC100XLT 49.95 B T 1.2 V VeCad Datiertes set c4 eighQ S 1 95 FBE-T Frsguency D rectory foi Easlern USA S*4.95 FBW-T Freouency...

Graphics Photographer

WGE Cerner Pe ft> Qf< Mjgft NH 0-3450-119* 603-525-4201 Subscript I an Customer Service 1 00 25-0643 Colo redo'Foreign Subscriber* call i 303 47-9330 Wayne Green Enterprises Is a division of Internal tonal Data Group Reprints Thl firs I copy of an an i c e S3.00 (each aodmona copy- Si 50 Write to 73 Amareu' Radio Magazine, WGE Center, Fore Road, HancocV NH 034 9 Attn Artete Repinta 25 watts high 5 v atts adjustable low Programmable scanning memory, band, or mode scan with *COfVv channe and...

Warning

THE DKjITAL VIDEO STABJUZER IS INTENDED FOR PRIVATE HOME USE ONLY, IT IS NOT INTENDED TO COPY RENTAL MOVIES OR COPYRIGHTED VIDEO TAPES THAT MAY CONSTITUTE COPYRIGHT INFRINGEMENT The besi and mosl exerting video tlabilfrer in the marfcei Siaie oMhe-Art Microchip Technology Works on flif VCPs & TVs Similar units sold elsa-where for 99 Light weight & compad Uses a s anda.'d 9 Voir ban cry (lasts 1 - 2 years) battery noi included Air Shipping AvaJI abte UNCONDITIONAL 30

Hote

CONNECT 71 IMt GROUHD FDSL lOlwKTTf& foR CLARITY IF TilN INC UPACJTOft BOARt MOUNT KP. POINT IT this wAt--*- WET At, TABS < m UOiO tRAfl TOftUE - .- -' - -- -_ Figure 4. Parts placement guide far the QRP transceiver. Figure 5. Printed circuit hoard foil diagram. Be sun to reproduce this at exactly 100 , so that components with critical lead spacings (e.g. interg rated circuits) will easily fit onto the prepared board. r HIGH PERFORMANCE 1 PRESELECTOR-PREAMP * for transceivers and repeal*...

M Km

RT7V, ASCII. CW WEFAX. SSTV Gonifl-ir Memory Keyei Orders and Price Checks Call 800-523*7731 ' TiSSET Figure 6. A simple diode meter circuit to measure relative pow er output. Figure 6. A simple diode meter circuit to measure relative pow er output.

Circle On Reader Service Carp

* for transceivers and repeal* AM ATEUfl hr , COMMERCIAL * Automatic Operonen - adiustofie speed w am ilude - Srah size e sy notation - 7 JO 15 .oils OC * 6 setectdb reprogrammable e ijg s - ch -p la L mir long * Wired, lesEed an programm e wilti your messages Model ICM - 54.95 Mode ID-2 w12 to iO minute limer S79.95 We offer a complete line nf iransmitler and receipt stnps and synthesizers foi amaieur and commercial use Rtftjjerii our Irce calalOQ Mas ercurd and VISA welcome

Sice Kkf Generator

NOT F AfJPLllER NOT FQLiRF D 1 i-& ETERS OF ImA OR to the PA, giving different power outputs. A I kO preset in series w ith a 470O fixed resistor will give a variable output from about 200 mW to about 1.5 Watts. This is useful for points in contest operating. Fit a 500 mA fuse in the 12 volt supply lead, especially if you want to use a car battery and a diode to prevent reverse polarity accidents. These notes are based on another 80 meter rig I have built, using some of the information in...

Meters

Wot(i Is spreading fast* Nothing m tch* the KRP-5000 lor tolfl performance and value. Not GEt not *ven Motorola RF performance really counts Enjoy high performance opera in i i n -r plater en-jn-ruents Su Iht KRP-5000 receiver gives you 7 helical Ft > C JI i rs, 1 2- )OleS Of fF Iti --n r j af I ri precise Schmitt trigger squelch with automatic threshold switch-inq 1 he u i& rn11tur gnves yi.i clf- ar) 1 MOS FET power K p 5000 Repeater siiown with PA -100 Ampiifler aiutop Mc reverse...

Incorporated

3 107 West Hampden Sheridan, CO 801 10 Fin vi < 4 Build Fuliift i uil lamcfro* Na mca urinf nr * Prtiold T J CiIX Firing 4 Kinkpcwf Q kiFIm wilt Fully intuUitd, wx il L Q - orrade. lew IW M dttlgp DrcbkS tG ft 204 fi 1 MQ Di *lt M S z GSfcY ltBft 0-10 Dipol * C RV s.'l. -M ft 40-10 pipok Quarter kt ORV J6ii 20-10 Marc- AJ*rrtfkil S jJOiLVifli ihlV Jip le VI Ni'ili AJj S. Poll jk HjuJIlH Nie 11 DrcbkS tG ft 204 fi 1 MQ Di *lt M S z GSfcY ltBft 0-10 Dipol * C RV s.'l. -M ft 40-10 pipok Quarter...

Ne

R SELECT FOR DESEED TONE ( 10K 50 K ) S * VARY INPUT IRES FOR REQUIRED OUTPUT Figure 8. RFT circuit* Sel RIT to compensate for the frequency difference betMeen the two CIO crystals. Figure 8. RFT circuit* Sel RIT to compensate for the frequency difference betMeen the two CIO crystals.

S

5 wpra rhis is the beginning tape, c.iking vou ihrou h thi' 26 letters 10 numbers and necessary punriuolion complric with iractici1 tvtry sicp of the way. The easr M kerning confidence even *> the f int uS hiiurl 6+ wpm This is the practice tape for ihost+ who survived the 5 wpm tape, and it's also the tape for Ihi Novice anii Technician licenses It is comprised of one solid hour of code. Characters are sent at 13 wpm and spaced at 5 wpm. Code groups are entirely random characters sent if...

Circle On Header Service Caro

PSj4-65> A d sp ay of 270-770 MHz TVRO block downconverter showing SCPC, digital and video transponders. The newest in the line of rugged spectrum analyzers from AVCOM offers amazing performance for only 2,675. AVCOM'S new PSA-65A is the first low cost general purpose portable spectrum analyzer that's loaded with features. it's small, battery operated, has a wide frequency coverage and is accurate - a must for every technician's bench. Great for field use too. The PSA-65A covers frequencies...

Save Time

Bring things down for safety and convenience. Nmr ciirnD your tower again with Ihn *iev*Tor system. Arv tWftfU* iftd iitOriTHHKii O* HAZER. compile syiieon i flis lower in rertic upright position Safety *ock system op-oralis fiii r.- nrco- G Br5 Nwii ar I'all Corntierp k-t Fneiudes winch. 100 it ol Hardware and Initrvctlonv Fatflo.ln 2Q To1**1* Nil i-Hwjv Hurt 3- Standard alum a sq ft. kwd 5223.95 pp< t- H iir 4- HewyQtfv ite I6sq h load l l.35pp< J. Ha rB-Haavy duly galv. stosi TB 3q II...

Icom

PBS 10 8v 500MAH SUPER 7S A 8S 13.2V HOOMAH 9.6v 1200MAH (base charge only - 1 longer) Introductory Offer YA SU MAXON FNB 10 7.2v 600MAH fNB 12v 50 MAH *FNB TOfS) 7.2v 1000MAH 'same size case as FNB-12 P4W 11 v (q 500MAH -FNB 2 11v SOCMAN -S 53 CUSTOM MADE BATTERY PACK & INSERTS Made to your specifications. KENWOOD INSERTS PB-21 513 75 p PB-25 S20 00 PB-28 00 JCOM INSERTS 8P-5 BP-3 Preces jDf& cl io change rt-inauT notice. OUfl PRICES CAN'T BE BEAT SEND FOR FREE...

The Challenger

A Unique Multiband Antenna thai Utilizes the Patented 6.A.P. Center Launch Technology BUI Pasternak WA6ITF 23197Robin Ave. Saugus CA 91350 Barry Goldwater Says YES to No-Code I'll make a prophesy, and t won't be alive to ever see it come (rue. if we continue to require a knowledge of code for an amateur license, people are going to just plain die I'm SO. and I know Tm not going to be around here forever, and when I'm gone, that's one iess guy who knows the code, so what's the difference I donHt...

Ar

T I puce F c- gl r Prepaid Upnind MAK . )2i Covers it 15C8MH2 id& M FM Wide VU tncdes Co n 111 l loiis c ove ra g e 2000 Channel Merjjorv j 984 Scat* Frequencies & leSp rdiproups Scan S ar speeds up r 36 c iineisor Jilt re jj eins per second Bmli ir RS 232 computer interface. Day Salisfaclicii Full ReFund Li riot Size-3Vf H x 'W * 7 AD. Wt 21b 0oz Suppled with AC & DC pov.-ei cords Teles-opin antenna. _ ____ Our 10lh Veer of delivering Quality Software lo the Mernsl.io.nal market

High Power Rf Switched Preamps

10240 NATHAN LANE MAPLE GROVE, MINN 55369 612-425-7709 Model 146 160W 2 Meters 19db Gain .75db Nf Model 146OS 160W 2 Meters 19db Gain .75db Nf Model 440 70cm 100W 16dbGain .75db Nf AN preamps have helical filters to prevent out of band intermoduiation in the receiver. Model 146 covers the entire 2 meter band. Model 14SOS is of very narrow bandwidth and would be suitable for SSB. Packet, of Satellite Model 440 is factory lunabfe from 430-440 MHz or 440-450 MHi per customer request. All models...

The Investigation

Ham radio is becoming more and more computerized, Contemporary PLL rigs have a large digital component. There are many, man software programs on disk and cartridge for your ham shack. The future of ham radio is very much tied to the future of computing. A great deal of the stuff that's produced is public domain software, hut much of it, especially the more user-friendly software, is commercially developed. If the developers see that they cannot trust the ham radio community they ma> deal...

Ps Audio Multiplier

Thf PS it1 Mi tff H gn ftMk, I mil aun-u ' oiuiign mnsunRwtiE nHiHip tf Up 'r ency * jraal ft* ft. 1WH ffl MU nncnl5 < rnulEkpl ny 10o* 100 - Ol hi resolulton T-bulfeh signal proamp condlttonir L0 1 i > J * STJf(f T*J D ODcrcui Tf K 5 P5 rut rrV ivp i BW amasf S& z* I& Wk hi

Calendar For June

Children's Day, China National Day, Tunisia (7th for Chad, 25th for Mozambique). 2 Anniversary of the Republic, Italy Coronation Dayt Great Britain. 5 Constitution Day, Denmark Liberation Day, Seychelles Bank Holiday, Ireland Queen's Birthday, New Zealand (10th for Great Britain). 6 Memoriai Day, South Korea National Holiday, Sweden (10th for Portugal, 23rd for Luxembourg), 7 Independence Day, Norway (12th for Philippines. 26th for Madagascar and Somalia, 29th for Seychelles) We asked this...

Mission Communications

TEXAS 77062 Now it's easy to add a multi-band remote Yo Iii repeater can link to any lYcqu eruy an up to six banc a with ACCs new interface to the ICOM iC-900 Super Multr-Bander Our pew KC-900 Interface connects your ACC cointroller tcj the ipOM band units (the ICOM fiber optic controller ,u d interface aren't needed . Add new bands to your system by jusL adding band units And best of all - everything j ust plugs together ri you've built remotes before,...

Uhf Models

Kit mth Ca se 69 Kit less Cas 49 Wif fl w case J99 * Specify tuning range desif& d 142- I50t 150162. 162 174, 213-233, 410-454. or 454-475. See catalog for full line of 2w transmitting converters for vhf & uhf Kits only S 79. Linear Amplifiers avail, up to 50 w. FCC TYPE-ACCEPTED TRANSMITTERS & RECEIVERS AVAILABLE FOR HIGH-BAND AND UHF, CALL FOR DETAILS. Send 1 for 36 page catalog by return mail. (Send 2.00 or 4 IRC* for overseas mailing) Order by phone or mail * Min 3 S & H per...

Pennsylvania

Authorized factory sales and servicc. KENWOOD, ICOM, YAFSU, featuring AMERITRON, B& W. MFJ, HYGAJN, KLM, CUSHCRAFT, HUSTLER, KANTRONICS, AEA, VIBROPLEX, HEIL, CALLBOOK, ARRL Publications, and much more. HAMTRONICS, INC., 4033 Brownsville Road, Trevose PA 19047 (215) 3571400. FAX (215) 355-8958. Sales Order 1-800426-2820. In Dallas since I960. We feature Kenwood, ICOM, Yaesu AEA, Butternut, Rohn, amateur publications, and a full line of accessories, Factory authorized Kenwood Service Center,...

Circle S On Reader Service Card

Winding a transformer can be tricky when you're trying to gel the right wire soldered to the correct circuit board pad. Refer to TA on Figure 6, Note the dots. These are phasing dots. The) indicate which wires are on which end of the winding. Numbers I and 2 are the ends of one wire, 3 and 4 are the ends of another, and 5 and 6 arc the ends of another. Numbers 1. 3, and 5 begin the coil and 2. 4, and 6 are at the other end. Notice, however that 2, 3, and 6 are connected together and go in one...

Al Linear Amplifier

The Amerltron AL-84 is an economical amplifier using four 6MJ6 tuOes o develop 4QO watts output on CW and 6CO watts PEP on SSB from 16G through 5 rreters Cr ve required is 70 w typtcaf. lOO w max The passive input network presents a low SWR input to the exciter Power input is 900 .vatts The Al-34 s an excei'ent boc-< -uc portabe or beginner s amp > tief Sae flYalW * t H x 12VaD Wgt 24 tos

Fe Edback

FOR IBM PC XT AT PS 2 & COMPATIBLES - S89.95 - TMormoliCGlty insels in o log Cwnpuler DAfL IIMt - Ironsceivef Fi ECXJENCY MODt furred Ker-und Iccm motfels), I Is bo h a Loaning mid a luminal proprnm Nfl Other Id Interfaces ilh- Konlronics KAH. ond AfA PK 3 lis t> o(h o Logging Mi a ienninal program I,_ _ ________ ____ __ . _ _ _ I Worts with a Mouse and of Fund ion Keys i i-ds ond easy control l Termfofll Unils < *r d Datn i nLry. I Conk si J de ond guio si r iriq rcplocerminl itsdremfly...

Tra

The same winning featuies are yours on 70 cm with the TR-85W * 25 W riron power 5 W adjustable low * MC-43S UP DWN mic. and me hook included Complete se v ce manuals ar& avadaDte tor ali Kenwooa transceivers and mo si accessor Specifications anti price* are subies to change without nof'ce or onligQiioi 1 Specifications guaranteed for the 144 his MHz Amateur band only

Po Nw

1 lie finest QSL Cards at reasonable prices, Basic cards, map cards, cartoon cards, photo cards and more. Your idea converted to ink, or ase standard designs. 525 ink colors, any type of card stock. Photos in b w or beautiful color 1 lave a card that fits your style, Call or write for free samples and details. Postage appreciated. Chuck Miller N6KW KW Litho - Dept. 73 RQ Box 17390 Ft. Worth, TX 76102 (817) 332-3658

We Will Wot Be Undersold

12AS Rowwocd, Dterflefd* EL 6 0I5 iimt 292-771 ijl2> 541-07)0 TS Day Money Sack Guarantee 2 Yea i Warranty PROTECT YOUR SEN5IT VE X EQUIPMENT FROM DC Id t MHi Duii Cna y CFTT Raatovl OC 0*fe*t Ait Wag-.f.-er CtfTE f S t * Autofinging -, . * Trigger L AJI Hruchj scjo*iJ-< -rofl Hot ti mebea j a mit*c-i J r 4f o oarrs wa i Dor P> 4CMi fie) Y> t Labte tor 11

Radios

Senvltwall mod* AM CW.SS8> Cctu t < 35- 1.0Of fG-7lSIHi Owrctcunvri ft dryqn j-' AWLf t Ls i mjM i uv minh w Aat fr l r f * aJ ct-rc t It Hl c C i if . -r - j Trri * * ti r * bwld wollen art eitacaiioHiU-* me l*iww rm< a pr T ngborana iH( Lfcf ' f j'-'f j'.-Effc AS . ' HT ein* retned *pnea alt, rrjr., Ahvhtffl mll HiU prc tS mjf i& > Utrwwf_ . __ HIM tew iM tlM __ QRP TRANSMITTER KITS, 40 & 80 METERS Opera i r ,i mini tiarn liack tiHiii plhc 1-55 a- e iitaa.1 Hi*Ucsr4& our...

Communications

NOW ONLY 299 fflEE WITH PURCHASE 140 WHjc AtT Nt AT0RA 49VALUE DEALER INQUIRIES INVITED ICGM, AEA, LARSEN, VAN GORDEN, VIBROPLEX, NYE-VIKIMG, FALCON C0MMr LEADING EDGE, ARRL PUBLICATIONS, KAGLO.HAMTRONlCS.SINCLAIfl ANTENNA, AMP SUPPLY 280 Tiffany Ave. Jamestown, New York 14701 Wesfftm tftw York *sfintst amainar ry& o drtliff, F i-- i wt loldfrtnji irac p i ou toolfcit itfc itil hi idg -Aid for ir tu vL r Sj n d time1 * iruii H L I.U i I Ml tlnitarMf

Bns

THE DX'ERS MAGAZINE Up-to-date informative, interesting Compiled and edited by Gus Browning W4BPD, DX-CC Honor Roil Certificate 2-4, Send for free sample and subscription information today PO Drawer DX, Cordova SO 29039, BNB261 QSL CARDS- Look good with top quality printing. Choose standard designs or fully customized cards Better cards mean more returns to you. Free brochure, samples. Stamps appreciated. Chester QSLs. Dept A, 310 Commercial, Emporia KS 66801. BNB434 SUPERFAST MORSE CODE SLU...

Bird Electronic Corporation

Bird Electronic's new model 4029 Power Sensor Calibrator was designed for use with its 4420-series RF Power Meters. In conjunction with a CRT or PC with a serial port, it provides in-field calibration of the power meters to within 3 of a known RF standard. A menu guides you through the calibration process. You connect the calibrator to a 4020-series RF Power Sensor, and drive it with a known amount of RF power at a specific frequency. You enter the power level, and the calibrator automatically...

Dx

- T t Magic of Him Radio frv Wfl* W i Jf I in- riL-M h inr vnii aant tu M)P k Linc inttic cd In humming, lend V111 j Jcfry's fascin t 1 p 11 hiW we've hud n ftuitarfie history t helped in ul LNpr emergen it cut it Am niiL CAplor liOci Htn mt don it i n i 01 h il ht c m y our beul hot'l l i h r i n.1 ' SpnLLi S3.N J. irpA If.JiW AMI jffdi HlrMfa V Ciirfii U Mf Z 33c pi i-is. 24S illii rrjiion< -517,95 Y LUI I 1 - Ii I II II1 It) tflU I.JM MMlmil worlds -if ctunnmniCAijon ilint iuvl just ' vrie...

Amateur Electronic Supply

4828 W, Fond du Lac Avenue Milwaukee, Wl 53216 Phone (414) 442-42( WtCKLIFFE. Ohio 44092 28940 Euclid Avenue Phone (216) 585-7388 Ohio WATS 1-800-362-0290 ORLANDO. Fla. 32803 621 Commonwealth Ave Phone(407) 894 3238 fla WATS -800-432 9424 CLEARWATER, Fla, 34fi S IAS VEGAS. Nev 89106 CHfCAGO. Illinois 60630 1898 Drew Street Phone 813) 461-4267 No In-State WATS 1072 'N Rancho Dr.ve Phone 702 647 3114 No *r> WATS Sh'rl-800 321 3594 800-327 1917 No Nationwide WATS Ki-800 634-6227 FPrrKSON...

Bnb

Transmitter keyer and code practice program. Features keys any transmitter, menu driven, 1000 character type ahead buffer, 22 programmable messages, 1-100 wpm (plus selectable speed modifications), selectable practice programs, manual, and much more. Nothing Compares, 100 Moneyback Guarantee. 19.95, Same day return, Lloyd Wilson, 4464 N. Lakewood Dr,T San Bernardino CA 92407. BNB880 EVANGELICAL PASTOR with Advanced Class license, but without ANY gear would...

Visa

C-02AT High Pow r IC-04AT for m MHz IC u2AT lor 2m FTP ICu4AT 440 MHz nP IC-2GAT for 2m, TTP IC-4GAT 440MHzh TTP Regufair SALE 289 00 259 319.00 279 409.00 349-1 4J9. 0 389-329 00 279-' 369 00 289 ' BP-23 600ma fl 4V No Charge ith purchase of IC u2AT or IC u AT Aircraft h< ind handheld* Regular SALE fC-12AT IW 2GHi f M HT -'batt cgr TTP J 73 369 IC-12GAT 1W 1.2GHz HT batt cgr TTP 529.00469 A-2 5W PEP synth iiircrattHT 525.00 479 A-2Q Synth aircralt HI w V0R 625 00 569 Accessories for j < -...

Membership Application

25 in U.S. 36 elsewhere (U.S. funds) Licensed amateurs, or age 65 or over, upon submitting proof of age, may request the special dues rate of 20 in the U.S. 23 elsewhere, in (U S funds) Persons age 17 and younger may qualify for special rates, write for application For postal purposes, fifty percent oi dues is allocated to OST, the balance for membership Charge to VISA Mastercard Card Number _ AMEX Discover Expires _Signature _ _ The American Radio Relay League 225 Main St. Newington, CT....

Made In

Coders 100 MHi to 199.999 WHi in i kHz steps thumbwheei a> a Accuracy + - 1 part per 10 million at ail frequencies * internal FM adjustable from 0 to 100 kHz at a t kHz rate - External FM input ac cepts tones or voice Spurs and notse at leasi 60 dB below carrier * Output adjustable from 5-500 mV at 50 Otims * Operates On 12 Vdc ' t Amp Available for Jmmediaie delivery 429.95 delivered * Add-on accessories available to extend freq range, add Infinite resolution, AM, and a precision 120 dB...

Super Yaesu

SUPER YAESU FNB-4SH. 1 volts, lOOOma. double me capacity of the YaesLi FtyEM 5 vait output Rapid charge onty 71 00 SUPER YAESU FNB-3S. 9 6 volts I200ma trjpie the capacity ot the Yaesu FNB 3. 3 5 wan output Rapid or wan charge 60 00 Botn are perfect lor 03. 09 and 727 series radios and are 4 nches nigh inssm for *act replacement FNB-2 Nicad Dack BP*3 22,00 for Yaesu FT 404R 207fl 20BR 70aR tfWma) 30.00 527 nn Icom & M (SOOma) 35 00 Add 4 00 snipping & handling for lirst pack CT resident...

Vaktenna

F i-- i wt loldfrtnji irac p i ou toolfcit itfc itil hi idg -Aid for ir tu vL r Sj n d time1 * iruii H L I.U i I Ml tlnitarMf kuift Vt.ur from tfcl jfr M Otffcidc I h rough ihf la-V Nu Holrt1 No PiflcKtd Cd i No Umfis MTR & JJf I I 1 SWl -ub ha Ihi', W h lOMICi Ludciitl f l- J f i 11 Uta b- 'a - ju 'i. - l lap f cjFt bSC n Util PO VH P* IflHIi Ursa Wro-UHT +W f NUif SCA ER T Ur di -i I m Eich Iki ri r< lp.li ntmk h Ii* WUl 11 Ml iM I F'Ki PUl uiclM-. . I . IM. UOfft k mtrl AVAILABLE

Ssl Ix

B Sf S ftMAttm TEimftStOH COHVEWtEB* A'v ni H m 1 METI H VHF AMPimEHS & EB67 - 1 M jnu Il S Kl Fl Vint S7 A (1 iflflS K.r .fctJdwi nur, tn4 tili wm Pu. A Il R bid in kW nr wi red jmf t Leij Our fw eil 0 i TJ I Communication visa 1 Concepts Inc. 1 1 Brawn S if m * a y t sn, O h .3 4 J02 * S13) 426- fiM) FM '5 439-3811 WhiJe Pitching rental movies, you wil notice en-noytng periodic coJor darkening, color thW* unwanted lines, hashing or jagged edges. This caused by the copy...

Yagi Optimizer

Dl tf nana rka i I e ne V 0 pr o i m a utonat icalh oijjtiita Vagi element lergtii t .md 'parings to maximize fbrwurd iMin optimize pattern and minimize SWR. Radiation pattern at bnnd t Filter iind edgt are updated On yOur scree 11 during opt i rm t r u YO exlnnn e I y fafli Computing several trial Vagi dc-u na ptT second wiLh tfOUT YO a complete Vapi package far IBM-PT contiintng modelii for gamma and h rpm n i thcs. element tapeniie. mounting platen, and frequency A library of Yagi Tiles nnd...

Santa Maria Ca June

The annual Santa Maria Radio Swapfest will be at the Union Oil Co, Newlove Picnic Grounds. Swap tables, prize drawings, games, Santa Maria Bar- B-Q. All proceeds s u ppo rt t he prog ra ms of t he Satel I i te Amate u r Radio Club. Talk-in on 146.94 (down) WB6IIY R. Hank Korczak W6PME, 917 West Anthony Way, Lompoc CA 93436 (805) 7361761 The Radio Club of Junior High School 22 NYC. Inc., wilt operate WB2JKJ from T100-2000 utc on the above dale in recognition of t he f i rst d ay of s um me r...

Hbxs Hdbxs

HBX48 339.00 HDBX48_ 424.00 HBX56 435.00 BX64 S469.00 Ciy ved tov yr iiuty Complete packages & components Sectiodv 25G*, 59,00 45G 139.00 5SG S 179,00 Oil us for afl your ROHN requirements Kirfd-ovtr tower FK254& S1125,00 FK4544 S 1485.00 FX 255 SI 95,00 FK4554 SI 59 5 00 FK 2568 I235.00 Fft45f> 4 51695.00 Guywire 3 16EHS I 4EHS SOU 5*11* CCM Cable Clamps 3 ltf Tumbuckles l TE& E & Preformed Big Grips Guy Insulators 500D 502. 1,69 2.99 HPTG-2I00 -4CKK) -6700 Cable JO JO 0 50 0.70...

Kenwood Usa Corporation

Arrl Frequency Hopping

CA 90810 P.O. Box 22745. Long Beach, CA 90801-5745 The crew of the St. Peter's (Missouri) ARC at their October 88 meetingt The evening's program was How to Reduce Repeat TVt Complaints given by W& OGS (the carrot). After a visit from this bunch, would you complain again to something more substantial. 4Z4QZ will continue in his position as the repeater s Technical Custodian, This brings to nine ihe number of FM repeaters operating on two meters in this tiny...

Teimtec

WHEN YOU ARE READY TO TRADE, CALL MEMPHIS AMATEUR AND TRADE UP TO TEN-TEC The PARAGON Performance Plus NEW 961 Power Supply The Paragon is the result of a three year engineering effort. We are proud of the Paragon and we think it has set new standards of excellence in synthesized rigs. Check it out yourself. We think that you will share our pride in the Paragon.

Linear Amplifier Project

1944 Ham Antenna

Follow-up to January's 220 MHz transverterproject For those dedicated home brewers who have just gotten warmed up on the transvener project (Ian. '89 73)+ here is another item to apply the iron to the DMOS linear powcr amplifier. This amp is constructed on a 10 x 3 k V radiating fin heat sink. The linear output of this amplifier exceeds 60 Watts RMS on CW power. The heat sink is somewhat larger than required, and runs quite cool, The amplifier is contained in an attached box made from...

Apf

No discounts or commissions are available. Copy must be received in Peterborough by the first of the second month preceding the cover date. Make checks payable to 73 Magazine and send to Rebecca Niemela, Barter N1 Buy, Box 278, Forest Road, Hancock, NH 03449. 100 QSL CARDS 8i Shipped postpaid. Free samples. Shell Printing, KD9KW, PO Box 50A, Rocktor IL 61072, 3IMB059 HOSSTRAOERS flea market returns to Deerfield NH June 3. SASE for info. WA1IVB, RFD Box 57, West Baldwin ME 04091. BN8864

Antenna

NV 89015 At my place of employment, where an FCC commercial license (2nd Class General) Is required, less than 10 in a department of more than 200 employees are licensed amateur radio operators, though many expressed an interest in the hobby. At my former place of employment in the Telecommunications Dept., there were only two licensed people, though again, many were interested in ham radio. Why, in a nation with millions of electronic technicians, engineers, and...

Catalog

Work quite well in diffused light, such as hazy humid weather or cloudy skies. The crystalline cells will fall flat on theif faces under those conditions. Antennas West makes use of the Sovonics P-201 panel, It is rated at 23 War's under peak sum conditions. This boils down to about 1.6 Amps for battery charging. The P-201 measures one foot wide by four feet long, and weighs under five pounds. Antennas West supplies a 30-foot cable that is attached at one end to the P-201 panel. This is a four...

International Hambassadors

Australia Ken Gott VK3AJU, 3BALansdowne Rci , St. Kitda. Victoria 3193 Austria Bahrain I an Cable A92BW. POS 223 1, Muharraq Bangladesh Belgium Brazil Gerson Rissm PY1APS, POB T217B. Copacabana, 20000 Rtode Janeiro, RJ Carlos Vienna CamdMo PYiCC. Afonso Pen5, 49 701. 20270 Rio de Janeiro British West Indies (See Urlted Kingdom) Canada Cftite Canary Islands (See Spurn Chma (People's Republic ofj Chang Han Dong (6Y4A0M) Inst of Esluahne Coasta Research. East China Normal Univ. h Shanghai 200062...

Helical Resonator Preamps

Features adjustable tail amp time-out timers, sol Ed-state relay, courtesy beep, and local speaker am plifi er 49 CWID kit. Diode programmed, adjustable tone, speed, and timer, to go with COR 3 59 NEW CQR-4 kit. Complete COR and CWID all on one board for easy construction, CMOS logic for low power consumption. Many new features. EPROM programmed specify call letters,. 99 NEW TD-3 5UBAUDIBLE TONE DECODER ENCODER kit. 24 TD-2 DTMF DECODER CONTROLLER kit. Full 16...

Ft Fm Ht

Cerritos, OA 90701 213 404-2700 Price Class 350 Yaesu has a long tradition of innovation in HTs. From the first digital-dispiayt microprocessor-controlled walkie the FT-207R to the first dualbantfer the FT-727R t they've led the way, defining the new frontier. This tradition continues with the introduction of the FT-411. The 411 is part evolution, part revolution. It packs into a shirt-pocket-sized radio all the features of the larger rigs and adds some terrific...

Six Meter QRP Stat on

Who says we don t use tubes anymore The unit described in this article proved the theory that It is possible to establish contacts at quite respectable distances with very low power. Designed primarih for mobile use. he station nms from a 6 volt batten. For 12 volt operation, the heaters will have to be rewired and changes made in the power supply. An AC supply is included, making it a station lor all-around use. Before going into the details of construction, here is a brief description of'the...

Qrp Swr Bridge

This simple project lets you monitor your antenna system's SWR. Low power QRP operating enjoys an enduring popularity in amateur radio. Much of the equipment is relatively simple to home-brew, and there isn't the need for many of the precautions required when operating at higher power levels. Opinion on what constitutes low power varies between different countries, and between different operators in those countries. The G-QRP Club's definition of less han 5 Watts input, and the American QRP...

Phones

F giire flecevVer schematic, pF capac tor from p Yj 1 to pin B of the 12AT7. precaution being that you keep the plate lends away from the grid leads. A 0.005 condenser is placed across the primary oi the modulation transformer to prevent any undesirable feedback. I wound the modulation transformer myself because there weren't any around at the lime. A Triad M4Z or similar transformer is best, Pa alteration to the receiver layout. The RF amplifier is u cascode using a 12AT7 or 6BQ7. Although the...

Mfj-1286 Gray Line

Select any of several antennas from your operating desk with these MFJ Coax Switches. They feature mounting holes and automatic grounding of unused terminals. They come with MFJ's one year unconditional guarantee. MFJ-1701, 34.95, Six position antenna switch SO 239 connectors. 50-75 ohm loads. 2 KW PEPr 1 KW CW. Black aluminum 10x3x1 V inch cabinet. MFJ-1702, 21.95. 2 positions. Cavity construction 2.5 KW PtP, 1 KW CW. Insertion loss below .2 dB. 50 dB isolation at 450 MHz. 50 ohm, 3x2x2 in....

E Ranger AR

Ranger Radios

Box 445 Issaquah WA 98027 Phone 206 392-0419 Price Class 350 When I last reviewed a Clear Channel Ranger 10 meter rigr I came to a couple of conclusions The first was that the rig was a reasonable,. alJ-mode 10 meter transceiver. The second was that it wasn't the most operator-friendly in the world. After evaluating the AR-3500, a higher-power, upoated version of the origmaf I have found some improvements, and some areas where things are pretty much the same. The Ranger AR-3500 is a...

Antennas West Solar Power Supply

Sovonics Solar Charger

Antennas West Box 50062 Provo, UT 84604 801-373-8425 Price Class 290 plus 10 shipping In the past, generating power from ihe sun was a hit or miss proposition. Most of the ear y solar electric pioneers used surplus panels, with sornewhai Jess than outstanding resufts. The technology and economics of converting energy from the sun directly into electricity have improved rapidly Antenmis West s solar power supply is an excellent first step in converting to solar power The heart of the Antennas...

R Extra

Call 913 381-5900 FAX 913 648 3020 continued from p 76 AH of us have ai least slightly different perspectives on these things. If you're working on a homebrew project and can't seem to get it to operate quite right, drop a line to the author There may be a spider or two that got into the article, if you do write, please, by ail means, send an SASE for your reply. I know from firsthand experience that those who send an SASE will get a reply quicker than those who don'L Jn...

Model Ccb Rf Detector

The hand-held Model CCB RF Detector from Optoelectronics will indicate the presence of a 1 mW transmitter within a twenty-foot distance. The bargraph display successively illuminates up to 10 segments as the distance to the transmitter decreases. This simplifies locating and deactivating the unauthorized transmitters, or bugs, placed in rooms for listening to private conversations. Other applications include checking the output from small or large transmitters used in radio telemetry, two-way...

Qrp Cw Transceiver

Tube Qrp Transceiver

A great little do-it-yourself DC rig for the 30 or 40 meter band. by Bruce Auld NZ5G and Bill Heishman N5HNN Much of the fun in amateur radio comes from having done it yourself. In my search for a project that would yield a unit with satisfying performance. I found two common problems The writer assumed loo much knowledge on the pan of the builder and the pans were not widely available. This project is different. The builder gets a running start in home-brew with something that will deliver...

1

We are nappy to provide Ham Hefp listings free on a space available basts. To make our job easter, and to ensure that your listing is correct, please type or print your request dearly, double-spaced, on a futl 6 V x 11 sheet of paper. Use upper- and toiver-case lei tersf and print numbers carefully a 1, for example car be misread as the tetters t or i. or even the number 7 Thank you for your cooperation I am looking for sources of harm-related and IBM emulaiion software tor the Hewlett Packard...

Elktronics

Board VDG-1 provides a quick source of instant video especially useful for those active in ATV or SSTV. Four computer graphics screens 2 Hi-res 2 color bar come on a custom-programmed EPROM with your callsign. Since the VDG-1 operates from 12 volts DC, and measures just 3.75 x 5 it's ideal for ATV repeater identification or portable and mobile operation, You can switch from the l,D, to live camera. An automatic timer sequencer allows you to display all four graphics...