J

Figure S U Schematic of the hookup, showing the batteries in series. Photo SA. The complete system, with the computer removed so that you can see the TNC, HT, and battery compartment I use the 12 volt DC batteries because they will allow a full 5 Watts output on my HT and allow much longer usage compared to the HT battery packs. The life of the battery is about six to eight hours, depending on transmit time and battery temperature. I charge the battery using an A& A Smart1' Gel-Cell charger...

Ask For A Free Full Line Catalog

Amateur Electronic Supply Ham Radio Outlet Heni Radio Madison Electronics EGE Barry Electronics C-Comm Ross Distributing Quement Electronics LaCue Communications Ham Station 1614 130th Ave. N.E. Bel le vue. WA 98005 TEL (206) 454-4524 FAX (206) 453-5704 IC R71 A. 751 A, 7 1. 20A H, 3BA, ISA, Mlcro2 4H R-7Q0G. iC 761. IC-375A 275A H. 3210A, 4 75A H. 735, IC 900. fC 228H , IC448A. IC725 JC2AT 12AT C02AT 32AT C2 4GAT ICA2AJ16 MARINE iCOW M5hMS5 700 AVIATION COM AHI H r

Rz

Kenwood's RZ-i wideband scanning receiver covers 500 kHz to 905 MHz in AM and narrow or wideband FM. The automatic mode selection function makes tuning easy. This new receiver features one hundred memory channels with message and band marker, direct keyboard or VFO frequency entry, and scanning functions, such as memory channel and band scan with four types of scan stop. The RZ-1 is a 12 voft DC operated, compact unit with buiit-in speaker, front-mounted phone jack, switchable AGC, squelch for...

Jfi

-Logs multiple study scuioru and allows resuming 4t * laier lime, returns to review misled questions if (fcsinnJ. -Creates randomly gcttcralctl sample tests and analyzes results showing areas Tor additional WO print ranJ TTt wriuon test* and answers ffith fcpsoit IBM compatible printers_ Heavy Duty switch for true 1 Kw POWER - 2 Kw P.E.P. Ceramic with Coin Silver Switch Contacts Single Pole, 3 Position Desk or wail mount An unased position* grounded *CS-3G - UHF connector. 530,50* *C -3&...

Aea

UPS wants 220, UPS is in com* petition vwih the United Slates Postal Service. USPS is owned by the same guys who own the FCC. Maybe the FCC gave 220 to UPS so they could not be charged with trying to corner the market Don't use UPS, Telt your favorite mail order ham store to send it by snaii before using UPS I believe this is called a boycott Robert Godlewski KA4SBE Ft. Lewis WA 98433 Bob, I can't tell whether you're joking or not Do you really belt eve the government fears being charged with...

Aircraft Receiver

T 4i citing airiTatt cammunicAliDriii - pn.ki up pianei uit to Kt mii-tn jtftflv RKiivts 11D 13& MMi W 1 band n a to lu (ltd supn-1 ie( design w rn A& C. i. c .m tiiC I ui tt and si abPr squelch Rum an 9V battery. 50 mw audifi rjutput, t yv sensmviiv OiHional malctung ABSpla& lic rijE n if-, yeul lkafl pn' hirii m-, i. i-ni-dyrapnica aiifl ni.icnini'tl alurnlinjrnknobsIftf .1 mi promuionAl look Cotioiict-greal lor or iqt iusi oinin having ground 1 tie

All New Kits

H * ip tjpsi rmr.'Liwj f fl iip*i iwtarti 3 rcti p anti oati rati ti'hr t . , rnudris. rynr 1 . '1 j It ar-i ' ng I (JflifItH6fih Urtlt fjvi r 1 i niif ra-ju tEDdigiial iflidoiJKJisjBB tpMtfun rTni'F. pnl'mur MhoffiiKrl poi i uui ai lier ' tond1 Ld-pncne riutpul fie Umis twd 1 u tottM tflna Iq .nirrnii.L mm imludfldf ind im-'iorilSfflC Easv to buUd Nl mlfirtnjidviclrcurtrvll PC SU plli KHshtluflfl ABS p slii M Kilh '.jcidv grap ki ir J piiiflimonii tcoh A Afy i.ifli -i and

All Sales Final

Ameritron, Antenna Specialists, Astatic Aslron B K, S& W, Bencher Bird, Butternut CDE CES. Cushcraft Daiwa. Ejmac, Henry. Heil, Hustler, Hy-Ga i. com. KLM, Kantronics, LarsenT MJFt J W. Miller Mirage, iNye, Palomar, RF Products, Saxtorv Shure, Tempo. Ten-Tec, TUBES Yaesyr Vr rople3f Oupfexers Repealers. Scan nefs. Radio Publications. Uniden. Kenwood. Maxon, RFC WE NOW STOCK COMMERCIAL COMMUNICATIONS SYSTEMS HAM DEALER INQUIRES INVITED PHON IN YOUROftO R 4BE...

Amateur Radio

Ftrsi BOOH 01 Modtm f fetlroniCS Fill Projecis Edited by Art Satsberg Looking for a way la have fun, increase your technical expertise, and save money - all at the same time This unique compendium chock-full of projects will show you how, 19.95 Commodore f 4 TrouDteshootlng & Kepir tutor by Robert C. Brenner This book will guide you step hv step through the complexities of making simple repairs to your Commodore 64. 19.95 mini Program lor iu m Radio & tfee The electronics hobbyist,...

Amateur Television

NOVICES NOW YOU CAN TRANSMIT VIDEO WITH OUR NEW TX23-1 Did you know that you as well as all classes of licensed amateurs can easily transmit live action color and sound video just like broadcast TV with our TX23-1 transmitter. Use any home TV camera and or VCR, computer etc. by plugging the composite video and audio into the front 10 pin or rear phono jacks. Call or write now forourcomplete ATV catalog including downconverters, transceivers, linear amps, and antennas for the 70, 33, & 23cm...

Antenna Analysis

Thfi new MN pFpgram will analyze almost Jin.Vr iinti niia made of wire or tubing. Compute fnrwrard gjiinr F B, honm -idlh, pdelcbes uurrcnt. impedance-, S Wit, d& i, at d far-ft l s, in frue tip aw Or over rL lislically-tnodeJ u d j arth. i1 ot a rn .c n n a ra cl i a tion p t tern s on yoi ir graphie sfr eUi MN eaitpornpute the mterfl ti among several nearby anL-ermat> . The f> -l 4r MN di& k contains over 100 ii fc c s including librEiriufe of an tonna and plut files, ii fill1...

Antenna Modeling

With menus. and optional mouse Enter parameters, and get a color coded sinusoidal projection of a MW or SW antenna Move ovi1' the projection with a mouse or cursor arid read 1 he gain at That point. LONG WIRE PRO model* long wires, vee sr dipolti. and rhombics displaying a sinusoidal projection 40 VERTICAL PRO models SinglF verticals or arrays displaying a sinusordal projection, a ground wave plot and the impedance of each element S30 SM PC compatible. DOS 2.0 or highe* 56K, CGA or...

Antenna Products

The imminent removal of the bottom two megahertz of the 220 band to make room for United Parcel doesn't exactly put the band out of commission. The fact is this won't seriously affect most 220 operations. I bring this up because the ham dealers telt me that the sales of 220 gear have virtually stopped, apparently in a panic ovef-reac-tion by hams who have heard thai the FCC is taking away the 220 band, but haven't bothered to read the details. Frankly, I can'l think of a much better way to make...

Apartment Antennas

Thi IiiK of JAUAnat are hdnl*fbr apartmcnl d rlltfi and trlvtfttn fbiV muunr on (fm *iih two p neiful -uj cv > ' jnd Jv > -.i ftitn tot muflih C il bt.li Ltitji.f* rr ni- t-> CbnpItfU -tti if jU sh1 I HC I NC. PLi5 - jul Ulhrr IWlH4pAf MtHt TlWWl TV* Ail idlltfwf El lut shortwave un-1 rcnnrier reception ( ol fur ininsrniitin ) Ir ii WW Hi *ith an I if.Ml u-Ab iii.pNfttr Pm- h-i hy 5VA( III'.' ihil iH lt i -ii.i TPrxicni iv ml si.'In Aiileniih, unit 1 j ' rhh> t,.L, ,L,*,j f*T,al NC...

Ar

TdllPr nif ril Ptrpa.- C nvs J O EiO r.j ttajndn 5 Ai oda i tAJU 5 15 if> K3 Al *i 1Mb * CovmSMBETaa-lQOMH m AM' FM Wvle PM mo ConTm Oujs ccveiage l& t4 & C3T. Frequencies If Search Groups Scan Se ar c de up 3 haarlels 11 nete rr, tai- f ri second BulI in R52J2 ccrr.p-ite interlace DavSattsfecti ii 3uaianii e full Reiunclrin t Satisfied Sue 3vt*H i H N x 7 D V, . It o - Supplied wL h AC & DC pewef c ids- Telescopic antenna _ _

Available Options

100 Watt model call for details) Mic w Freq Scan. Buttons 30 00 SP-1 Speech Processor* 30.00 CW Auto break-in & pwr control* 30.00 Service Manual AR3300. AR350D 20 00 3 Elemenl Beam, 26-30 MHz 69 95 Penetrator Mobile Ant 4795 Aniron A-99 Vertical Base Ant .4795 RS7A Pwr Supply lot 3GW Ranger 49.95 RS35A Pwr Supply for 100W Ranger 134.95 Offer limried o available stock Send a SASE for detailed brochure Quantity P n c rng Av a i latHe f oretgn Orders A ccept eo Orders received by t PM PST...

Bcxlt

It * * Facsimile Machina 3 Phonaa it + it It you need an excellent facsimile machine. CEf has the full featured Faxtel330O fax by Pactelat a special price FAX3300-T P crei Fax machine with phone S t.099.95 XE7SO-T Uniden Cordless Phon* Wilh Qpt.' tt'r S'39.95 + + * Extmndad Sarvica Contract iririr H you purchase a scanner. CB ractar cliirecior or cofdJess ptroneirom any store in the U-S Of Canada *iltiintne last 30 dayi, you can Qei up to tti ee years of emended servtc contract from Wan ntecfi....

Bnb

Memory aids from psychologist engineer cut study-time- 50 , Novice, Tech, Gen 7 each. Advanced. Extra 12 each. Moneyback guarantee Bahr. Dept 73-3, 2535 Marietta, Palmbay FL 32905. BNB691 CHASSIS AND CABINET KITS SASE K3IWK, 5120 Harmony Grove Road Dover PA 17315. BNB69B Barter 'N' Buy advertising must pertain to ham radio products or services. 1 Individual (noncommercial) 50 per word U Commercial1 .i-iv ____-_____ 1.50 per word Prepayment required Count onty the words...

BOTH

Write a message to a grven staiion (by call sign). If no call sign given, message is to ALL. LOCAL Only computer or terminal attached to HK-21 RS-232 port can use Ihis command. RADfO Oniy remote stahon using packet radio can use this command BOTH Command can be used from either LOCAL or RADIO terminal LOCAL Only computer or terminal attached to HK-21 RS-232 port can use Ihis command. RADfO Oniy remote stahon using packet radio can use this command BOTH Command can be used from either LOCAL or...

Buy With Confidence

To gel the fastest delivery from CC of any scanner Send Or phone your order directly to our Scanner Distribution Center' Michigan resrdents pleaseado4 sales t K or supply your tax I number Written purchase orders are accepted from approved government agencies and most well rated firms at a 1 CKfc surcharge or nil 10 bi img. All sales are subject to uvaftabNEty. acceptance and verification. All sales on accessories final, Prices, terrns and specifications a'e sublet to change without notice. All...

Carolina Windojv

M-ETHEH f VI KW i N DECEMBER 73 MAG St IM Enthusiastic users say it's the host wire anlrnrm. Outprr-lurnis wireantennuspreviously us*d Knock you-scicks-oft ptrfprmancenn ai) 10. A 170 beam1 If yrm hear one. you U w nt one Mjdc wtrhpndoby the RADIO WORKS in VARJSA 4 digit sequence & QUAD expansion A relay option Touchlone to RS232 300 finud interlace TSDQ 79.95 QUAD 599.95j DAP 89,95 P.O. BOX 4215, ANDOVER, MA 01810-4215 USA (506) 475*7831 tnciudes Interlace, disk, cables, Manna Simplex...

Carolina Windom

Uae transmatch 132 overall Matching XFMR tin isolator Verl Radiator Co *Jed High performance Proven R sulta V 70 Beam XI Of iw I fleas ArhiS f icepttonaJ Ht iff ant I --. - Contact Jin. W4 7HU-fr ditcoLjiii tjto I fi r Ljl kiik, Ci,VkS tiaii B G1S9 Pcftlrticju h. VA J7 3 r Sr mobHe aritenn,n. tJuch*. wire. X f CpntJK t um. W4T HU -fr diico n i cata lo v L SiiviSM tata by lilCUiimdii 1 9flt Portsmouth. V* 2 3 TO 3

Carries Lowest Priority

Photo A Vu 5k Unk Controller. 24 73 Amateur Radio March, 1969 Photo B. The Main Controller B< mrd and the optional LED displaypanel. Photo A Vu 5k Unk Controller. 24 73 Amateur Radio March, 1969 Photo B. The Main Controller B< mrd and the optional LED displaypanel. at a fraction of the cost of comparable units

Cbc International

A Compact 2 Element Beam for 20*15*12-10 Meters Operate As A Di-PoJe on 17 Meters r Bultemut's HF verticals use highest-Q tuning circuits (not lossy traps ) to outperform all muitiband designs of comparabfe size SO 40. 30 20 15 and 10 Eers autarkic bandswiteh-ng Add-on kit for 1 7 am1 12 refers available now. 2G 11 tail Unique design reduces siz but not performance. i No lossy traps full m element radiates on M all bands. a Automate bario swicMing on 00 and 4 rtielerr, Act(j-on units tor 160...

Cbtoten

7J h.irn vd the way un CB I 11) meter onvrrstans Take advantage o imr offer lo help you ftel on 10 m L r s before ihe fciiiispols p* iik again tt's easy and ave you moneys An OM of yours borrowed a prized copy of 73, and now it's among the missing. Let Uncle Wayne help restock the issues in your almost complete 73 yearly volumes from July 1980 to the present. Write us today for the copies you need from July 1980 to the present only, Sorry, but we've sold out ail but a few collector's copies...

Circle Oh Reader Service Card

Bp* uNcn h vt y um -i.sk al y Whcrv Jul ( k in article nevtci* th.i ngJ Or ujni iJ eo koie j labuiutu jritL ictHjr ltuU remember mih ihc futiv of the juiNtt ind'or callupT vmj rL > c jn uvtkni lttmrci-73'icwitpikd Inde* i* Thii J .> mpkle tMinp of iE H ouv rc tcwi, Ic-uiufn, jrvJ trulumn und m d*np4ctr keyword taung 1m OV lt> i suc tihti Jummr> ThriHigh Dcccmhcr T48H Du tndex & jv.Hil.ilik m a pnrtlod lormjt. un iffl MS DGS flupp) (till IAS( ri fournil I Of bydirect upli* (have y nur...

Circle On Reader Service Card

Here is the next generation Repeater No other repeaters or controllers match Mark 4 in capability and features. That's why Mark 4 is the performance leader at amateur and commercial repeater sites around the world. Only Mark 4 gives you Message Master real speech voice readout of received signal strength, deviation, and frequency error 4-channel receiver voting clock time announcements and function control * 7-helical filter receiver extensive phone patch functions Unlike others, Mark 4 even...

Circle On Reader Service Caro

AAfD OTHER FAMOUS WA jUFACTUr Jtt QftOCK iHiPPtD FE OJM iTOCtt WHiH J* MOU The finest QSI Cards at reasiitiable prices, Basii. Cfltds* map cards, cartuon cards, ptioto cards and more. idea converted to ink, or ust standard designs. 525 ink colorsT any type of card stock* Photos in b u or btraiitiful color Have a orj thar firs your style. Call or write for fret samples and dt-rciilv Postage appreciated. Chuck Miller N6KW KW Luho - Dept. 73 P.Q Box 17390 Ft. Worth, TX 76102 (817 332-3658 0 L...

Circle Os Beader Servie Caro

Unobtrusive DX Gam Antennas for GO thru 10 1 Easily hidden Install fail * Fijicd or Portable 1 Tbiri'i 3 20 meKt iBirnaa wiih rc+1 DX Punch fciJJ in Ebii pic lor*. V cia't k* l < bJ y< J*T at- -HN r itr-'r r iriiif, Hu H worfcl DM b ef> .r itywi X-y* . Uw profik k L. rn-tiAJcf.1 On 1 ckatfi Hwfcndtr r fit inxi AllemK fniif f LrtK. .PftcoiSJi SiWL Vtawk DX wjfraul telling I he nrtghbon Box 50062 S Provo, ITT IMfrOS (801 1 373-8425.

Cm

ATV1 IWICjAS-FET 1 *Q W *il ATVJ J I f T I S kil C rtipliii p*rt Lkt Pn( nf Ani Jhri*rs DeicriLirJ n Lht MOTOROLA Bulktim IS NI50 30UW n-bO L1 I Hf. 1 H& W 168 65 AN & 2H0W 143 25 EDJIAJdOW tl39.2 ftN 7g ww & Q4 W S1S N E W11 3 DO WATT 1U lia V i Ar ' Ut lifiiT tPVffift SPUTTERS .COMBLE PS ATV1 IWICjAS-FET 1 *Q W *il ATVJ J I f T I S kil C rtipliii p*rt Lkt Pn( nf Ani Jhri*rs DeicriLirJ n Lht MOTOROLA Bulktim IS NI50 30UW n-bO L1 I Hf. 1 H& W 168 65 AN & 2H0W 143 25 EDJIAJdOW...

CN

6-pin Modular connector 6-pin Modular connector 12-pin Modular connector 12-prn Modular connector 26-ptn Ansiey right angle D8-25 male cabie crimp 3-pin Molex PC mount 3-pin Molex crimp mount Amateur Radio School 2350 Rosalia Drive Fullerton CA 92635 y-n f _ * ft j , w- ____ruiwuun UM S DJ Cj o for more voice prt vi leges at 5 wpm pnce ciass 40 Pius 5 s h Jerry Ziliak KBGMT is a ham in more ways than one. On the TV screen, he stands out as an enthusiastic and personable instructor On the audio...

Code Tapis

We've had so many phone calls from yeople wanting our famous 73 code tapes that u e ve decided to bring them back 5 wpm-This is the beginning tape, taking you through the 26 letters, 10 numbers and necessary punctuation, complete with practice every step of the way. The ease of learning > iives confidence even to the faint ot heart. 64- wpm-This is the practice tape for those who survived the 5 wpm tape,, and it's also the tape for the Novice and Technician licenses, il is comprised of one...

Comet Antennas Stocked

Hy-Gain Tpwers & An Lennys arni Rotors will be shipped dired to you FREE of shipping cost TS44 S AT, R-500 , R-2000, TS 940 S AT. TU 221AM21A, TM-2S7 W 30 A 30 A, TR 75 t A, Ken-wowl Service Repair. TM 721A, T 7l1 BnAH TM3& 30A. TH205AT. TH215A, TM-621A. TVI-321A TS140S. TS60OS, HZ r TS 790A

Communications

NOW ONLY 5299 FREE WITH PURCHASE 140 MHz 3W AttENUATOR A S49 VALUE DEAi.Efl INQUIRIES JNVfT D ICOM 4EA. LARSEN. VAN GOROEN VJBROPLEX, NYE VJKING, FALCON COMM LEADING EDGE, ARAL PUBLICATIONS KAGL0.HAMTR0MICS.SINCLAIR ANTENNA SUPPLY 280 Tiffany Ave. Jamestown, New York 14701 Hi'j jvw if i 'ifiitfit& MAiiijrrBdioijf itr. ATV CONVERTERS * HF LINEAR AMPLIFIERS ISCOVER THE W BL OF FAST acAftr _ 1 LLtVISlDN aLflMPLU eWS yr MPTQBQLA BULLETINS Ff FtBQ CWBE EVi

Company

San Diego, San Francisco and Phoenix in a round table. This was the Gronk Network a monumental pioneering effort that was kept far too secret. Today the same linking system seems to be going, but with no improvements of which Tm aware. This means that in time of a serious emergency and providing none of the mountain-top repeater links are knocked off the air or deprived of power, they'd be able to handle maybe twenty messages an hour. Great, Well, we've had some emergencies. Have you ever read...

Compare These Features

Toll restrict 1st and 2nd digit restrict, prefix lockout and digit counting 1-5 digit connect disconnect code 2-5 digit secret toll override code User programmable CW ID Remote hook flash Auto disconnect on dialtone busy signals Telephone remote base Remote controlled relay (relay optional) Lightning protected Call or write today for your FREE brochure*

Connection

PanrJs 49w. 4(Hv. iOiv. 9w. i 5w. i . uv CES Phtirn P ti hrv DTMF licrophones, DTMF keyboards KANTR( fCS Pa ki't Radio. CAPRICORN J .lj iiil weather i i UlSrili . TlHMsurrS and diSphiVS with speed mhJ direction. temperature, pressure computer compaflbJr) Programmable alarms. MIRAGE KLM Amplifiers* Anlpnnds. < ist models m stock Call lor prices i.uEiktng for International cilsir.il.nJien 5130 Duke St, Suite Alexandria. VA 22304. I '.S.A. Fax (703) 354-0843 Telex S54UB I 5130 Duke St, Suite...

Cor

All of these features available for such a small price, any repeater organization can afford to upgrade their repeater to a fully automatic microprocessor-based system. Keeping to the low current needs of most repeater systems, the link controller is designed completely around CMOS devices. Along w ith the need for low current was the need for user-friendliness You eun observe functions of The link controller by adding an optional plug-in LEDdisplus board which communicates all major functions

Creative Control Products

3165 Bunlfng Avenue Gritntf Junction, CO B15Q4 (303 43 -& JC5 Denise YLB Maline '> YL' Dan E tS0(3N' Louts 'KA PtsT FRV- 800 V Il 74V FRA-7700 AOW < FRT-7700 ANT-lOp I FRG-9G 0 60-905 < 1 VU-9600 NT.SQ V DW HAN DI T- 59,95 Cal 64,95 Call 69995 Call 2500 Call ELH-230D 7* y afp + RSffnp 10800 Cay ELHF2G0D M 60 WT Amp 167.00 CaM

Credit Card Orders Only

CALL TOLL-FREE 1-800-882-7388 TODAY Otto Service Ctf 2tH73 1332 PP ft to 6PU P5T U Res add s es taz 11345 W EJtyinpk 01. Suite 1100. L os Artgetts, CA WOW USA (Dept AS) rtr.ii it s *MPf W AWffflCA' Wirft SAUSFACTmG ARAttT tO' Of winm fl tfj j or iwnpfe mM' 1 TEAR Urol I id WAfl ftAMTT from MWicUr ALSO AVAILABLE AT HENflY RADIO & ALL HAM RADIO OUTLETS

De Fsk Demodulator

Kits 99.W t 179. 2W lu OXVj s jRkv, continuous duty, TCX0& ' * tai o ten options av aitab e . 7 TA51 for 10MT6M. 2M, M aT> 15 -l74t 229 MHi. LfWW FCC type accepted for commercial bands Call for latest information on 900 MHz transmitters. VHF & UHF AMPLIFIERS* For FM. SSB, ATV. Output from 10 to 50 Watts. Several models, kits starting at 79

Dealers

Yow company name and message can contain up to 25 words foras link as 00 yearly (prepaid), or S175 for six months (prepaid). No mention of mail-order business permitted. Directory text and payment must reach us 60 days in advance of publication. For example advertising for (he April 88 issue must be in our hands by February 1st Mail to 73 Amateur Radio, Rebecca Niemela, WGF Center, Peterborough, NU 03458. il hd JH 1 i j If 11. a IB I I

Dual On The

When it comes to power, pnce and performance, nothi ng can oaten Alinco's DR 510T mobile dual bander. Forty-five watts on VHF and thirtyf ive wafts on UHF put more nobody else on the road who match our two-year limited warranty. The DR SlOTgives you cross band full duplex, 37 standard subaudible tones, encode decode and an internal duplexer. Itaiso has CAP and AAARS modification capability* Not to mention oil the features needed for a compiete home system. And, as an extra added dimen-, sion,...

Eastern United States To

Jim Gray W1XU POBox 1079 Payson AZ 85541 Band conditions in March are usually the best o( the year for DX. On top of that, the solar flux will be hitting the highest levels in perhaps 10 years These should make band conditions superb, but we have to take into account the problems associated with the earth's magnetic field The greater the soiar activity, the greater the possibility of flares, proton events, disappearing filaments, eic. The number of sunspots will be greater than they have been...

Every

The entire run of 73 from October, 1 960 through last year available. You can have access to the treasures of 73 without several hundred pounds of bulky back issues. Our 24x fiche have 98 pages each and will fit in a card file on your desk. We offer a battery operated hand hetd viewer for 75, and a desk model for 200 Libraries have these readers. The collection of over 600 microfiche, is available as an entire set, fno partial sets) lor S1S0 plus S5 for shipping (USA). Annual updates available...

Expanded Indoor Swap Tables

( 25.00 for all three days) Commercial Exhibit Areas For General Information & Tickets - Registrants and Exhibitors contact Hamcation Information P.O. Box 547811. Orlando, FL 32854 ORLANDO HAMCATION & COMPUTER SHOW Sponsored by Orlando Amateur Radio Club, Inc. HAMCATION CHAIRMAN Larry Gilbreath General Information (407) 657-9052 Commercial Information (407) 898-1027 Ask tor Buzz S how a Iter CIRCLE 96 ON READER SERVICE CARD

Fe Edback

In our continuing effort to present the best in amateur radio features and columns, we recognize the need to go directly to the source you, the reader. Articles and columns are assigned feedback numbers, which appear on each article column and are also listed here. These numbers correspond to those on the feedback card opposite this page. On the card, please check the box which honestly represents your opinion of each article or column. Do we really read the feedback cards You bet The results...

Flh

FL-6 6Hi Q Resonators with Lo-Noise Transistor Amp (2M or 220 MHz) FL-4H 4Hi O Helical Resonators & Lo-Notse Tr. Amp. in shielded housing, (420-470 MHz) Provides tremendous rejection of out-of-band signals w out the usual loss Can often be used instead of large expensive cavity filters. Extremely helpful at sites with many nearby transmitters to filter-out these out-of-band signals. Improved Now includes audio mute circuit and Emergency Power ID option. 4 input AF Mixer & Local Mic. amp....

Fm

KJOiBll nwnrtfr. 10 7 Mig-Jiri Cirtuil deteci -t. 50 m* i*lfliri lpo*ei WUFH, fjpii .il m m on sllnd Ti FM broiirJcjhl Imn as mil large portions on fl ch srte.ttrnpjtTft squirtti 1er I m d-iiec tnjnwFictpiinl A& Otrh friarRwa FVtrttH Kf I tDfphl Jbic v bfWB 3001 irai *.l . Dy irint ill h.iJl i - KKliftl iil hi1 PWIwfle oase ihiko M ait . iIl a lEnru (wtCMy ind Bup TirtttimiiHoiii Thuns me linestunitovailabiff

For Commodore Computers

PACKET TNC INTERFACE PROGRAM ( 34.95) TNCLINK-64 128 provides a menu-driven operating environment for Packet Radio operation of any TNC requiring external software, FAST Machine Language program is more than a terminal emulator. Features include * Computer data transfer rates of up to 1200 baud * User defined split-screen size and colors * Complete Disk and printer support * Operating setups can be saved on disk * Ten 256-character message buffers * 8192 character receive and transmit buffers...

Frequency Counters

< - -., t+tyy-- - a nucv .- . it- gw I nrVvminj s > -ciflr rs poo* ttbrt - i* a.- --pr ccs A .-.--i-iii-'i itL- ** *r*i'vo* Miiind Ibt to U*e peat pndt n betog rt ivjm mjmrfic- ' . nPittnH*USA Cfrnpi-tutttlcilaia Out Wie * n V totftHd. i* fctf tf lo UHF. witnFH iw nptriB Tffcl P'i.ji- i1 A Mn CFCll dyiMiiuribK h Diaii pUlkd'tttnjFCflturdciOnsmjCtwn Ml* Ittrr HAnw itLredmitw USA rclei jpii whip unlcnni UNCplutf I B BS Hlfth ' npedanct proEH' iigh1 loiiding ________,. I& .fo L tfw uasE...

Get Your Bearings Straight

At last A map dedicated to the radio imateur. Announcing the Azimuth-Equidistant wait map from Lihe Great Circle Map Co An ajimuth map provides information about heading and range to any place on Earth. Mo Eonger will yc*u have to giiess which way to aim your beam antenna for (ha rareDX. h mop is ,sp< rcialJy drawn with voui station il the exact center The rest of the work is spread out around you. To use trie map simply find the target station and read the compass heading from the border of...

Goto

1900 TF DA 0 THEN NS - ELSE H'S 1010 IF DC rt THEN W riE ELSE WS 1(130 RETURN Mil- IF L 0 THES GOTO 1300 ELSE GOTO 1120 UjlI PRISTPlease specify 'K' or *S+. 1 20 PR STE n.or latitude Degree* ,minutes, seconda. S < r S I13P KPUT 1140 IF 15 < > ti AND 1 < > ,rSh AND I < > AND IS S THES GOTO 111(5 11S0 IP IS OR IS - THEN Hi - W2tW3 - Wl U60 A2 VI - IW2 60) + (w3 3600) 1170 GOTO 1190 PU T'Please specify EL or W* * 119fc PRINT Enter longitudei Diorvis,'in tes, seconds, (f. W) Lh 1200...

Great Price

AZ 85015 999 Howard Ave 1702 W Camelback Rd Geoige Mgr W06DSV Bob. Mm K7RDH 5 rmle soulti Oil 1(Jl Irom SF0 East Ol Hwy 17 OAKLAND, CA SAU OIEGO, CA 92123 2210 Lrvingslon Si 5375 Kearny Vrila Rd 415> 534-5757 (6T9i 560-4900 is esc ai 23rd Ave Ran> p Hwrj TfiJ A DaremonT Vria BMi 6265 Sepulveda Blvd 1 (6101 90S 22X1 Ai Mgr K6YRA San Dm go a Victor 6 vd STORE HOURS 10 AM-5 30 PM CLOSED SUNDAYS

Ground Strapground Wire

GS30 3 8* tinned copper braid GS 12 1 2 tinned copper braid WW06 6gz Irm ate stranded wife Alt prices plus shipping, S3.00 min, Visa.'Masrercord 930 mln, COD add S3.00 or htj hr tor compter price t t Nemit's now 4 page CABLE AND CONNEi tQR SELECT (ON GUIDE m furtrifr si no charge with orders otS50 cif wore, or al i cost of 4 with cfjdit gainst npm qualifying nriiw NEMAL ELECTRONICS* INC. 12240 NE 14th Ave, N. Miami, FL 33161 (305) 893-3924 Telex 6975377 24hr FAX (305)895-8178

Hardline

FXAlt 1 2 Aluminum Biack FLC12 1 2 Cabiewave corr. copper btk jkt jkt ________169 ft FLC78 7 8 Cabtewavecorr. copper btk fkHt J 25 ft NM12CC N conn 1 T car copper m f 2500 NM76CC N conn 7f& corr copper m T 54 00 1160 BELDEN 9913 vary tow am ________________________ 52 1102 RGQ V 95 shteld tow tofj foam 11gt 35 1110 RG8X 95 shield (mini 6) 17 1130 RG213 U 95 shield mit Spec NCV At 39 1140 RG214 U dbi silver shtd mit spec 1 85 1705 RG142B U dbi sifver shtd. teflon ins 1.50 1310 RG217 V 50 ohm...

High Performance Preselectorpreamp

The solution to most interlerence, intermod, and desense problems in AMATEUR and COMMERCIAL systems. 40 10 1000 Mftz - tuned to youF irequency 5 large helical resonaiors Low noise H*gh overload lesistance a dB gain ultimate rejechon> 80 dB 10 to volts DC operation Size 1.6 x 2.6 x 4 75 exc. connectors FANTASTIC REJECTtON Price CALL bipolar w RCA tacks Connector options BCH 5. UHF 6. 600 Khz< ' 144 M h* -28dB

Hiperformance Dipoles

New code words ccurs you nom 10 wpm iq 35 wprti wilti jhred 90 mmute auriio cassfitres l.earn common wordF. And nuTbers ijsed in all CW contact Noihiig to write down I tarn at your leisure Si 9.95 + S3.00 P& H Write or call for fr& e info. Of 3D d WlM., (Dpfl Jiifl t p** * iiiPug uniqirt Bnlnrinfl tr Qit, I taroda I n gr code and theory whi driving fe) and fro-T Aijr-t was easy f ' Learn detailed tfteory or only the questions and n oj'test No nc Genera tneory catirns on cassettes S19 95...

Fjd

H*m*i Vaiy ( Fniiui Cru Yuli i-mTu- Uu n-r1 1*1 Figu n 2 fit e Morsi te te r data rm > u irh the kiter v rep It u < v fry mn emon ics. Bay x> ophoncs create yourzestful quar* let (long pause). One of the perennially favorite college computer science courses is something called Data Structures. No course of this genre would be complete without a discussion of trees, usually portrayed upside-down, where the flow of data comes into one place at the top of the tree and then branches left or...

Ii

* AT-440 internal auto, anienna tunef (80 m -10 m) - AT-250 external auto, tuner (160 m-10 m) < AT 130 compaci mobile antenna tuner (160 m 10 m) - IF-232C IC-10 level translator and modem IC kit * PS-50 heavy duty power supply * PS-430 PS-30 DC power suppty * SP-430 external speaker M8-43Q mobile mounting bracket - YK-88C 88CN 500 Hz 270 Hz CW filters - YK-88S 88SN 2.4 kHz 1.8 kHz SSB fitters 1 MC-60A 80 85 desk microphones * MC-55 (8P) mobile micfo-phone HS-5 6 7 headphones * SP-40 50B...

M

The 150 pF capacitor in the input line compensates for impedance mismatch. You tune for maximum signal fransfer from exciter to final i(Use an in-fine meter or external fieid strength meter.) The final is conventional Pi-network I used two 75 pFAPCs because I had them and they fit well, but a single 150pFcap would work as well. You need nearly full capacity in either case. When neutralizedr the plate current dip should be at about the same setting of the 20 pF plate capacitor as maximum output....

Myp

Shure 444 D 56 95 HEIL BW10 BcxJin Mike, wiffid fl pin 69 00 Alpha Del to Trans ilrap HV 33 00 CSl Privaio Paicn IV H hn. . . II), H-l -> - T-ll .-I . , 169.00 Ameco 2W Stt Mag Mount Comp --------25 00 Thousarxfeotpafwiineters 3 95 up CALL At iovox 10001 500 leedir rough caps * 95 Trartsiorrr r 1 0VPit,1050vnA ilBW.re) 5000 100 mf d 50 V A * ihI Cap 2 20 120 mid 450V A iaiCap 3-00 Ar ista SWtt Br idije 3-30 MHz 19 95 50 B2-61 lSiM,ile(Ampngnol 3 50 Dtxjbie Female UHF __. 5 00 UGW& RG6* - _...

Pkl

State___Zip _______ I LlAE DMC DVISA Check Money Order Mail yuiir order lo 73 Mag ine, WGE Center, PtiertwroDflh Ml 0345 Aim Uncle Wnyne Similar to SCT110, 10 Wts. nom. * Includes on board proportional Xtal OscJOven circuitry for very high stability' BA-40 40 W, U HF AMP. BD, & HEAT SINK ID250A CW ID & Audio Mixer Board High Performance Boards & Sub-Assemblies These are professional Commercial Grade Units Designed lor Environments (-30 to 60 C.) All Equipment...

Udx

Schematic for (he VCXO modification. Figure 2. PC board foil diagram for the 'CXO mod. The em toned sections on the hoard are foil. Score between the sections with an X-actO knife. working right (the frequency swing that 1 desired and sufficient output level), 1 installed it in the radio for the final test. Figure I is the schematic of the VCXO mod Figure 2 shows the etching pattern of the board. This can be 1 1 etched'* with a ruler and an X-acto knife, or with a Dremel tool with a...

Ufh

T tncle wagie's ftoofcsfttll order Form l l The Packet Radio I I J The Beginner's Handbook of Amateur Radio 16.95 1 I DX Power Effective Techniques for Radio Amateurs 10,00 I I Transmitter Hunting Radio Direction Finding Simplified 17.95 1 I The Digital 1 LI The Commodore Ham's Companion T.,___________9.95 I I Master Handbook of 1001 1 World Press Services Frequencies , Shortwave Clandestine , Satellite and Cable TV t Shortwave Directory , < ,17,95 jj f lJ The Hidden Signals on Satellite I...

Ica

High VSWfl arid Overdrive Protection 5 Year Warranty, 6 Months on RF Transistors AU Units haveGaAsFET Receive Pre amps TERMS Prices Do Not Include Shipping. Price and Availably Subject to Change Without Notice Wast Qrflers Shipped The Same Day COD'S Welcome Packet, WE FAX H ASCII. AMTOR RTTV, CVV Simultaneous Operation on H F and VHF

Icm Ec

VAESU, IIY-UAIN. ETC. ALL L.T.O, t AJ-UOOk MUftl It AlHfilUCAN ttl j W3.W IA IIM RJNR titaiJiTEb ii-ms IN TOCALl PRICES Ca rtjp PHFSTtJM .M'ln' I IIK hi I IrV- ' JS La i( jKI (l rOFL MT'THINC XOT J LSTEnS (.'fkLL< iK WK1'I lv HOSS DISTniBOTlNG COMPANY P.0. Bm 234A 78 South STdie Street. Preston, Idaho S3263 f eietihone fiS2-c-Hju we Close & l 2 OQjsfti MONOfl'YS & All Day SATORDAV

Icom

VHF UHF base multi-modes Regular SALE IC 275A 25W 2m FM SSB CW w ps 1299.00 1069 IC-275H 1Q0W 2rn FM SSB CW L399 00 1129 IC-375A 25VJ 220 fM 'SSB CW (t o) 1399 00 899 1C-475A 25W -40 m 'SSB CW w ps 1399.00 1099 1C-475H 75W 440 FM SSB CW 1599.00 1289 IC-575A 25W 6 10m xtvr w ps 1399.00 1129 IC 575H 100W 6 10m xcvr 1699.00 1499 EX-310 Voice synthesjier. T. TS-32 CommSpec encode decoder UT-15 Encoder decoder interface UT-15S U7 15S w TS-32 installed VHf UHF 1.2 GHz Mobiles IC-37A 25w 220 FM TTP...

Id

For transceivers and repeaters AMATElM and COMMERCIAL Automatic operation - astable idetl dn amplilude Small size easy installation 7 to 15 voJis DC B selectable, reprogfammaiile messages each up to 2 mm long Wired, rested, and programmed with your messaged) Model ID 1 - 54,95 Model ID-2 w 2 to 10 minute limer - 79,95 We oIIim & compleie Jine ol Iran& milter and receiver strips and synthesisers ior amat jr and comfnyrcial use Ftequ& si o r free CBlaiog Mastercard and welcome

1

Figure L Chan of Morse alphabet letters, listed binarily. Figure L Chan of Morse alphabet letters, listed binarily. * Complete ready to use DTMF selective calling unit * Use wirh FM oi AM lransceiver. scanner, etc * Buill in speaker Automate Speaker reset * Easy programming with swilLhes Call light * Unreil ncied 3 -digit code, all 16 digits Wrong number reset * 12 VOC mobile or base w m 11 7 vac power pack iincluded) 695 W 21st Ave. Eugene. OR 97405 Call roll Free -U0Q-338-9058 or 503 687-21...

In

S BAND CONVERTER FOR YOUR 137 MHz RECEIVER GAIN 13dB N.F. i.2dB 2VDC 40 ma 250,00 MMk 1691-137 5 GAIN 30dB TYPICAL N.R 6.BdB MAXIMUM 12VDC 150 ma Send 75c (3 stamps) for detailed specs on all VHF& UHF products Sapping FOB Concord , MA PftJCES SUBJECT TO CHANGE WITHOUT PRIOR NOTICE fin SPECTRUM INTERNATIONAL INC. (508> 263-2145 P.O. Box 1084S, Concord, MA 01742, USA

Indianapolis In

The Indiana Hamfest. sponsored by the Morgan County Repeater Association, will be open to the public at 8 AM at the Indiana State Fairgrounds Pavilion VEC exams. Admission, 5 at door. Eight-foot tables, S8 each. Advance registration suggested (tables sold out in 1988). Set-up on the 11th from 3-9 PM, Overnight security. Talk-in on 145.25 For table reservations or information, send SASE before February 24 to Aileen Scales KC9YA, 3142 Mar* ket Place, Bloomington IN47403. (812) 339-4446.

Info

Kenwood TH-205A 5 Watt, 3 channel, 2 meter HT radio Heathkrt HK-21 Pocket Packet TNC Radio Shack 32 KB Model 102 laptop computer Pelican 1400 Waterproof Case w optional panel mounts 2 Radio Shack 23-181 6 V, 2,5 Ah Gel-Cell cellular radio batteries Hook-up cables Photos S0 and SC show the internal case construction. I found that having the external antenna cable di rectly attached to the HT was inconvenient. I bought a female-to-female chassis mount connector and drilled a hole just below the...

Interna Tional

It is not too soon to plan a trip to Geneva next October 3-9 for 11ITU-COM, the First Worfd Summit for Etectronic Media. Sponsored by the International Telecommunication Union (ITU), it will be held at the Geneva Exhibition and Congress Centre (PALEXPO), under the theme Towards global information the Electronic Media Explosion* * ' Dis-tinct from the tTU's TELECOM world exhibitions. ITU-COM will be a series of symposiat with one coming every four years. The ITU continues to grow (see in the...

Ircuits

Have a quickn'easy circuit idea Share it and get a one year subscription or extension to 73 Clearly mark aH entries as submissions for Circuits to disiinguish them from manuscripts Send your entries to Circuits, 73Magazine. Peterborough, NH 03458. Ten meters does not require huge power. The W Watts from my Asden 2800 was a little skimpy, however, so i built a pair of 6146s to follow it. The circuit is very conventional, and i constructed it in a case that once held a battery charger As long as...

Isotron

Indoor antenna for Join the fastest-growing license-class Reneau Apartment-dweller's way to better stray RF 37 Maggiore HPC-201 Repeater Controller Full-featured and priced Good things now come in smaller and smaller packages N7KHU 49 Yaesu FT-79 RII All-Mode Transceiver This rig offers versatile 70crn operation. t

Hrx

Sell ham radio gear. Published twice a month Ads auicMy circu late no long wait for results. Send ft 10 SASE for sample copy. 13 for one year 24 issues). P.O.B. 2057, Glen Ellyn, JL 601382057. BNB741 SS S SUPER SAVINGS S S on electron ic parts, components, supplies, and computer acces sories Free 40-page catalog for Self Addressed & . Stamped Envelope. Gel on our mailing list BCD ELECTRO, P 0 Box 030119, Richardson TX 76083 Or call 214343-1770. BNB749 HAM RADIO REPAIR,...

Kca

The industry standard RC-850 Repeater Controller can ri Send a copy of Short Wave Radio ManuaL Enclosed is SI5.70, Chk, MC, Visa. Send a free catalog of other books. simple, highperformance old-time shortwave radio si All of (.he secrets arc here the circuit diagrams, parts layout, coil specifications. construction details, operation hints, and much more This is a compilation of shortwave construction articles from Sftorr Wave Craftmmagazines published in the 20 s & 30s. It s wall-to-wall...

Kenwood

FT-767GX, FT-757GXIL FT-747GXt FRG-8800, FT-736, FRG-9600. FT-4700RH, FT 212 712RK A S, AES, Oistara+I. Hy-G wv Hustler, KLM. METZ. Mosicy. MODUeLOX. TONNA .Butternut JC2AT 12AT C02AT 32AT C2 4GAT ICA2AJ16 iCOV Uli H t V1 0 U400 MAX ON U TOA LA, MARINE iCOW M5hMS5 700 AVIATION COM AHI H r

L

*3405 WFJ 1701 2 1 05 MF> 17D2 59 MFJ 1704 Select any of several antennas from your operating desk with these MFJ Coax Switches. They feature mounting holes and automatic grounding oi 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 PEP. 1 KW CW Black aluminum 1 DxSxtYi inch cabinet MFJ17Q2, 21.95, 2 positions Cavity construction 2.5 KW PEP. 1 KW CW. Insertion loss betow .2 dB 50 dB...

L Goto

The BASIC li ning of iht grid square location program (continuedi. 56 73 Amateur Radio March, 1989 tudc lonpludc or grid squares, as it is all menu driven, I used the program to assist a contact during the last 10 GHz microwavc corneal from Ml, Helix, in San Diego proper, to Heaps Peak, located near Lake Arrowhead in the mountains above San Bernardino, Entering the program. selected the grid square option and omitted the default location and replaced it with my location at Mt. Helix grid square...

Ll

A3-A2 A 4 A 1 A2 A4 Al ft3 Y1 X1 GOTO 200 Cl Aflg(L ) IF Cl > P1 THEN 520 GOTO 54 REM arc cosine must be converted Z2 SIN(AJ J Z3 C S A1 'COS A2) COS (C 1) Z4-Z2 4-Z3 The BASIC listing of the grid square location program. 64(i IF C> 360 THEM C-Yl-l& P & i Yi rl*i00+.5 im t Xl< liTi XI 51 100 IF K2 THEN SS N ELSE S S IF KL * THEN ES E ELSE ES - W 7 5 COSuB 1000 ' 11' Xv DA GOSUfc .630 72k- PRIST KDrCHR (a49) XH ' CHft U4 - 730 PRINT SS XX DGiG SUB 1600 74S PR * NT 1246)- 't w 790...

Locket

Figure Assembly details of protected mobile an- Figure 2. Alternate construction, this doesn't re- Figure 3. Lower plate coven hole in bracket and tenrm mount, quire w elding aids in centering the enclosure cylinder. PLATE C& vtfiS HOLF ANTj CKNTERS PIPE CYLINDER QN HUSTLEH BHAC1KET PLATE C& vtfiS HOLF ANTj CKNTERS PIPE CYLINDER QN HUSTLEH BHAC1KET tC-761, Xcvr Rcvr ps tuner 2699.00 2369 HM-36 Scanning tiand microphone 47,00 SP-20 Ext. speaker w audio liller M9 00 139 FL 101 250 Hz 1st IF...

Logwrite

Afi yu lirtd pi WdHtinfl your time rilld money on tiib-ppf lugging prwjj rninra Btjei 1. your station inui Ihc cotTipuiri l -e_ willi I Ot WRITE the < tialily menu driven user (riendfy lu inii pfP r am wrille n by E J Troy NG V LOG W KI J' I i s ihc p. rfr i ui essory Mr ttn- mttple h& m tAteott It impli lies yuiir Jttort jnd givt-i yrru ihr lumpflittvc Hup in Liintiatin* jr.il DXinjE LOG WRITE wilh AJI EBM i i LOGYVfilTF. i LiiL qtiii spin fontufr Jkwi fen niulia n us k)fgprif and irxt...

Lst

Should hear an audible dick the rela> closes, and the red tight should comc on. If not, recheck your wiring, Using a VOM, or continuity checker* check terminals5 and 6 for open circuit when only the green light is on check them for closed circuit when the red light is also on M not, recheck _ our wiring. Turn your interface box. transceiver, and amplifier off before proceeding. Connect a pair of wires from terminals and 2 to the control outputs of your transceiver, Refer to your operator's...

March

Sa fe amp keying Remote your mobile HF rig 30 repeater networker More CB to 1 Oml Easy feed-point protection ICOM has your winning line-up for fixed, portable, 220MHz The 25*watt output IC-375A receives 216,0 and mobile operations on today's hottest amateur bands. 236.0MHz, transmits 220.0-ii25.0MHz, and includes AC Slide into the winner s circle with ICOM s deluxe 75 supply, A genuine masterpiece series transceivers, with a team committed to excellence from VHF to UHF communications. Each...

Mc

Mail your ordena ZJMagai , __WGE Center. Peterborough NN 034 S8 20+ wpm -Congratulations Okay, the challenge of code is what's got ten you this far, so don't quit now. Go For the Extra class license. We send the code faster than 2Uper, It's like wearing lead weights on your feet when you run you'll wonder why the examiner is sending so slowly Back Breaker Sb.95 _______ For FIRST CLASS MAIL, add an add* tional 1.50 for prompter delivery. Photo A. Pete Hoover's version of the travel radio. Notice...

Mfj

ou can create an artificial RF ground and eliminate RF brtes. feedback, TVi and RFf when you lei the WFJ-931 resonate a random length of wire and turn it into a tuned counter poise. MFJ 931 also lets you electrically place a far away RF ground directiy at your iig no matter how Jar away it is tuning out the reactance of your ground connection wire 7V (3V 7 in Now you can quickly optimize your antenna tor peak performance with this portage, toialty sell contained antenna bridge- No otter...

Mission Communications

11903 a pf CiOd-re Suit* 500 HOkJSTQr* TEXAS 77G82 11903 a pf CiOd-re Suit* 500 HOkJSTQr* TEXAS 77G82 WE HAVE EXPANDS) AND NOW STOCK MANY NEW PRODUCTS WE CARRY AfA ALJNCO AVECO, A P SUPPLY, APHA DELTA. AMECO AflftL B& B INSTRUMENTS. BARKER & WILLIAMSON, BENCHES BOWAfl BUTTERNUT SEE CUSHCRA COUWUMCATION SPECIALISTS Cflc -ESEARCH C WA DIAMOND riEfc hustle hampiiujo. vru jflvstai i a wtfl sas cable KANTOONCS KACH1UA. KENPRO. KDK. KLM MiRAGE. LUNAR LA*SO VCC- V.- - V j N UTECH V -E E-GST RF...

Mode

Morse Code - Baudot - ASCII - AMTOR - Packet - Facsimile - Navtex It's a lesson you iearn very early in life. Many can be good, some may be belter, but only one can be the best. The PK-232 is the best multi-mode data controller you can buy* I he PK-232 should be listed in the amateur radio dictionary under the word Versatile. One data controller that can transmit and receive in six digira) modes, and can be used with almost every computer or data terminal. You can even monitor Navtex, the new...

Model

*JCS Internment Communication Service f50 Duty Cycle 5min on 5 mm. off) Aiellou Civil Air Patrol communicator called my attention to G. Harold Love's article, Code Test Sure Shot ' on page 10 oi the July 1988 issue of 73 Magazine. After starling off with some simple mnemonics to nail down the first few letters of the code, he then explained how to do a bit of contextual analysis to reconstruct the rest of the typical QSO-tvpe message that had been copied as vertically written dots and dashes...

Models

M w th Case Kit less Case Wired w.'c ase Low-noise preamps with neiical resonators reduce intermod 4 cross band interference in critical applications. MODEL HRA-(*), S-19 v f SBJ unf Specify tuning range desired 142-150, T50-TS2, 1G2-174, 213 233,410 54 or 454 47 FCC TYPE-ACCEPTED TRANSMITTERS A RECEIVERS AVAILABLE FOR HIGH-BANO AW UHF. CALL FOR D T4 LS. THE MOST AFFORDABLE GaAs FET PREAMPS ACCESSORIES Hmmtronicn * im m rmgimtmd trmdrnmmrit Fleure S. Schematic for the complete board of the 5K...

Multifax

MF2.2 and MF3.2 Two New Weather-Facsimile Programs * Are for the IBM PC and Compatibles. * Copy ALL known fax speeds fHF and Satellite). * Record, Display, and Print 1280 samples per fax line * Printer Copy jn 2 or 4 shades. * ALL data may be saved on disk. * ALL display views may be saved on disk. * Output to cofor or gray-scale inol monochrome) monitors * Recording length depends upon computer memory (up to 640K) * Include complete instructions. MF2,2isforthe CGA computer system (320 x 200...

New Online Call Directory

Our new hAMCALL service gives you 494,114 + Hams, via your computer 529 95 per year unlimited use1 IF YOU BUY, SELL OR COLLECT OLD RADIOS, YOU NEED Mineral, Virginia 23117 703 894-5777 800 282-5628 Antique Radio's Largest-Circulation Monthly Magazine Articles - Classifieds - Ads for Parts & Services Also Early TV, Ham Equip., Books, Tetegraph,4CTs & SO s Radios & more.,* Free 20- word ad each month. Don 't miss out Free Sample. 6-Montti Trial- 11. 1-Year l9 S28by 1st Ciass). Foreign -...

No

NOVEX SG4 & 2AD only 249.95 + S4 S& M NOV EX 5G41MA ami m above ftxnpt no Jigkall L-atloui. CO until only SHOi < SAH SV & M5 output Z> i til mdoui NOVEX AG260IA tffnillir to atm* - rcccpi pu Jigiial naloul ctnifllet only St-t'iQS * 14 Sill 4 lilfrmJ inputs on ctwlrpl iVCA) or FM iVCFj and produce AM, FM, ASK

Nov Ex

DM4Q61 Oip Metel very futn needs one A 11 ' ll'i e f H curry Kam stack chtcl Mfr, link c rC it , anlernen, ir-r U RF generator . intrriial m r> d uJal i on tLnih 1 nr horm n ici I.5 25 > MH pl Rin coi ti A 11 ' ll'i e f H curry Kam stack chtcl Mfr, link c rC it , anlernen, ir-r U RF generator . intrriial m r> d uJal i on tLnih 1 nr horm n ici I.5 25 > MH pl Rin coi ti Menu m oLiirui SUR. while Gfl Lhe iii 10 A GO an tokl 17 IM MM SO J9 conectwi FC525 Counter know your wiosntit frequency...

Only

R144 R22A FM RECEIVERS for 2M> ft* ** ' - 150* 174,or220MHz, GaAsFET front end. 0.12uV sensitivity' Both Crystal & ceramic filters plus helical resonator Jg jg j t STmtL ff front end for exceptional JSJpJmaiS* selectivity > 100dB at 12kHz (best availabfe anywhere)1 C e ife'WMjSy Flutter-proof squelch. AFCtracks L jj * drifting transmitters. fjr j -R451 UHF FM RCVR. Similar to above. Tuned line front end, G).25uV sens. (0 luV with optional hel res. preamp). Kit 149, w t 229. R901 FM RCVR...

Other Radios And Accessories

6C55XLT*T e caf 10 channel scanner Si 14.95 BC70RLT-T Bearcat 20 channel scanner Si 59.95 BO 75XL+T esrcflf 16 channel scanner Si 56 95 ftl O O-T fleyenc 45 channel scanner S 11 9 95 UCl 03-T fle frnc VHF 2 ch t Watl Transceiver 14.95 CPSa-T Regency 1 5 amp reg power auppfy 1 79.95 MA549- T Drop-in charget tor HXt 200 A HX1500 59.95 MAS 18-T Wall charoer for HX1500 scanner. SI4.95 MA5S3-T Carrying) case for HX1500 scanner 514.95 MA91 T-T Mi Cad battery pach for HXl000 1 200 39 95 BPSOS T Nj-Cad...

P Ioomhjixiok

* Hrgh luminance 6J'CRT - 1mV Sensitivity * tiKV ACCSlGfalln i Vol Ea J fr 10ns Rise Tiine fop Quality at a very mpsotibt le prir,e Contains al desired features Two ix, 10* c-robes. diagrams and manual Two year guaranien. Digital capacitance Motor M CM-1550 G Ran sE tpf'20,000u d .5 baiiL. ac y Zefo contfol wilN L se

Packet Radio

Com modern CEM I2 nacke adlDifilirlin.i Uhes larnwusfiormair iflicoiiiiortwari F& atur EXAFt IC crup aitOr mlflile peritlo runs Hf or VHFtoftea incluiidifriEt j fhiara PC boa'd jPIflrc uivfja tB nd Li d i.iimenla 1 ipn trwfFU rKSvcf jn f b I*' MgiTiH trflk 'V LrWn to itr Hjir Is 'flksri MflH sre ii 4 * JT * ub* iM -1 Utf -d < t *ME1Q' CimmilAH - If Tiilfi dum l MV> T h 5AA i - h a MtMC lOittCft Less ttBR I jurif MrtJrI it* r .T*S ST. 1V tiTtP > ft J JlXM> OctPLl (kKjoa ASS c* writi...