Patch

Ut* wnft any terming pn> grtm k wrn* Tour WI i ti ute' i tt I Computer Controlled Ham Shack for personal or club system New Simplex option, operate patch & remotes via repeaters HF & VHF Remote Base*Autopatch'CW Practice'Rotor Control 4Voice Meters'Paging*LoggingTolite IDVPacket Voice B.B.S, *0 per ale duplex or Simplex' Load, save, change all from T.tones, Packel, or modem* Unilmllod vole vocabulary Voice clock executes events Diiily i J Weekly ''Super Macros user 300-4 digit usar...

AUG

LOS ALTOS HILLS, CA The Pfirham Foundation wl> sponsor an Eiecttonics Flaa Mefhei et Foothill College Part ng Lol C S ers SiO p r veniek i2 pace& j. buyers tree CaM Ofy mlo Talk-in on 144.B7M45.2J Hr SPECS Camptj P rtijrtg ruts are e c ced1 Please pari i& gany 9 HD. Ofl The r-gn Cascade HaTiiair sponsored bi Ceitrai Oregon Ha Amafeuft wi be heid > VEC Eians DjfTvnyoal e*his T5 AdvanceticxetsSS. 17 medoor neaMartsMspace (10 wttn table Reservalcrs requtfed Ovefnighl area Ibr sei'-Comair...

Fak

All these features by rej your radio's existing CPU11 chip Priority Channel rrquiiH opUonaJ bardAAit, 59.95 lOpUonal Chip Socket ST & 0l Includes Operator * and Installation Manual' 4773 Sonoma Hwy+ Suite 132 Santa Rosa, CA 95409-4269 Write or call (707) 539 0512 For free information ATTENTION REPEATER OWNERS DELTATONEtw2.0 The Ultimate 16-Digit DTMF Repeater Programmer DELTATONE 2.0 , Ine pt f' ' . jrrt eiTventio youf repealer or'- let tovesftnent Df LTATOf Bod your MS-DOS computer offer...

Circle S On Reader Service Card

* Ultra compact 5* iStt* it * OF Ft> isolated output * Ballary oi DC powered - Full funclion iambac Kayer * Adjustable speed and weigh I * One Year Ace Sysiems Warranty * Ultra compact 5* iStt* it * OF Ft> isolated output * Ballary oi DC powered - Full funclion iambac Kayer * Adjustable speed and weigh I * One Year Ace Sysiems Warranty Ace Systems - RO i Box 83 * Wilcox. PA 15S7

Delta Research

WI 53213 FAX or Phone Weekdays 414) 353-4567 Auto rrfT-Qu -'- cy tvi-- lu n ana st-ensge i ng search and m log * Usef hiend ins ltalMr pfograrn t educes oret tar DOS * Ful suecos tf ietwi porrs CQMi-COi.u rmrw S12* memory OElTACOMW pe tormarkct' * pfopofttonal It rate Mthng Style Of (tep r caroano Ivpeti Tixnputef js kI

Info

A& A Engrneenng AceCornrnun cstions o Ihdianapotis Ace Sysiems A c v 3 Electros Apote L- ns Alaterna Aira eur Bebones Ajwico E ecfnjnics . AIIE ectr nn*cs Coiporj r on Amateur Electrones Supply Ampife, Inc. . Ant-Venares Ani enr as West Anianhas West Anf ennas West Amen as West Ante n as West Antennas West An enias West Antfep e Raa oCiai fteC ArtsoPuttrcat on Associated Radio AstronCorpotaiion AXM, Inc B & Br(nc. Barker S Wiltiamson B.- 'iy Electronics Corporation Bilai Company Bfainswm...

N

Table J CIV telemetry decoding parameters. Includes C 4 Interface, disk, cables. Manual Add 5-00 S H USA CA. address add 6.25 Ash for tre catalog Here are a tew OI ho Ultra's Fealures Touchtona to RS232 300 Baud Interface Decode A-Pad Mount Alt modules including CG4, > Prednlitfd & painted, irw mounis & cable clamor ALB* --p--Yace Miltu* A ID iwl. inq 1 Myg t 1.- I Ram, contioJ wrir CSflorPKS y g '- tAd ok*> 'Of neve boar 1 5 0 C6i. titiM.1 pnyecied M-xe DC PS 5 129 35 Ultra Comshack...

J C

9520 520 9340 9550 9560 9570 95SCI 5S0 3600 9610 9G20 9630 9 64 0 96 0 9660 9570 9 6 S 0 9690 9700 9999 10Q0 100 10 10020 92 20 CH IC i MW i R-22 GOSLiti 50 00 CMD CHR (0) +CHR O) CHR (01 EHR ( & H1J +CHR (& HS) RETURN 1 SCAN FOR 10 METER FM ACTIVITY PRINT PRINT PRINT' Hi any key to stop and CHQTCE VFO ft 22 GQSUB 5000 CHOICE HAilS R 22 GOSUB 5000 CHOICi i 7M R 2 2 GOSU3 5000 TEN CHR (& H95) GQSUB 95SO PRINT TKivT5 CHR & H96 GQSUB 9 5S0 PRINT PRINT * GOTO 9 55 0 'Keep the loop goina...

Every Issue

The entire run oi 73from October, i960 Inrough last year is available. Vou can have access to the treasures of 73 Without several hundred pounds Of ouiky sack issues. Oi.r 2dx fiche have 98 pages each and will at in a card fife on your desk We offer a battery operated hand held viewer for 75. and a desk model for S220 Libraries have these readers. The collection of over 600 microfiche, is available as an entire set, (no partial sets) for 250 pj us 6 for shipping (USA). Annual updales available...

Cw Fm

PSfc - QSL - TNX CORDIAL S 73 Y DX's Photo A The 1991 QSL card sent to contacts w th BD7TDP dunng the Carnaval Gaditano (Mardi Gras in Cadiz). from Cadiz have used this special call-sign on the air. During 1991, we awarded the people who sent to us confirmation of contacts performed with ED7TDP, during three consecutive years in SSB CW or mixed, an engraved medai to thank them for being with us every year during the Carnaval Gaditana 73, Paco EA7CZR, Each year's QSL has a different beautiful...

Lcd

6 7 8H x I 3 4D x 2 1 2W. 12oz wt, 100 Channels- Low, Air, High, UHF & 800MHz. Unrestricted 800MHz coverage. - 100 channels permanent memory, - Earphone Jack & Attenuator. Delay, Hold features. 5 Scan Banks, 5 Search Banks. * Telescopic and Flexible Antennas w BNC connector. AC & DC Power cords w mtng hardware. 25 to 1000MHz w 50'coax, Mag Mnt Mobile Antenna, 151 coax. Cigarette Lighter power adaptor. External Speaker with mobile mount, Extended Warranty. 2 3 yrs AS300 59.45 MA100...

Model G

All amplifiers (flim-rjiit ire linear, all-mode wilfc folly automatic T R switching and PIT capability The receive prcamps use GaAs FET devices rated at .5 uB NF with +18 dBm 3rd order HP. LP A, Standard and HPA amps an intermittent duty design suitable lor base and mobile operation. Repealer amps are continuous duly, class C. Amplifier capacities High-power, narrow or vm bind 100-200 MHz. 225-400 HHl 1-2 GHz. Military 128V), Commercial etc. - consult factory A complete line of Hi prismas also...

Bnb

LAMBDA AMATEUR RAD O CLUB International amateur rado club tor gay and lesbian hams On-air sfceds, monthly newsletter, and annual gathering ar Dayton (215) 973-LARC P,0 Box 4610. Philadelphia PA 19T30 BNB812 INEXPENSIVE HAM RADIO EQUIPMENT. Send postage stamp for lisi Jim Bradv-WA4DSQ 3037 Audrey Dr Gastoma NC 28054 BNBB9C GREAT C RCLE MAP custom plotted in four colors, centered on your QTH 22L x 24Countries ideniilied by prefix. Plastic lam n niter 35 ppd Vector Con l rol Systems, 1655 No...

High Performance

L'npard Helled Log Statistics, Auto QSO Alert Indicator. Auto Country, Prefix, and Zone Selections, frint Log Sheets, QSL Cards, and QSl Label* * Dual CJock Calendar. User ConiiguraEile. Search and Sort on Call Sign, Date Prefix, Country, State, CQ Zone, ITU Zone, or Usor Defined fields. IBM Compatible, AND MUCH, MUCH MORE r r h' fer u Iteidrnts Ptesst Include So rt Trt) 30 Day Money Back Guarantee FREE DI MO DISKanci.dc S lMf(.r Pt 111 Send Call and Disk Size (5.25 or 3.5) to Sensible...

Icom

Nothing compares to the captivating experience of operating the finest transceiver on the market, the IC-781. The exhilaration of operating the IC-781 is matched only by the luxury of its crystal clear communications. Designed for rigorous operation, the IC-781 is the result of extreme dedication, exceptional craftmanship and precision engineering. The IC-781 fuses the perfect blend of features such as driving power, incredible clarity, a Multi-Function CRT Display, Spectrum Scope and Icom's...

Circle On Reader Service Card

Fl* h cards 'NOVICE thru EXTRA * theory Keywords undertint Over 1600 sets in um For tegmner* OMs, XYLsAKIds. _. tECHNCUS S10 GENfRAl. S '-DVANCED Si 5.95 E*1RA S14.J5 shipping i - 3.00 icffnoff 4,00 CL li UISCOUNT& VIS STUDY CARDS P.O. BOX 1 G64C HATTIESBURG, MS 39404

Cm

AN7& I MOW 1160.70 ANTflJ 40W 4 M 35 AfOTtfL J W MXr AftttOH 20W f 3.1 AP31 DDW 1403.00 B U0W * W-6S EB27A 300W I13A.J5 Eft 144 6 0W M44.15 A Hit) S MOW (313.5 AMATEUR TtLEVtSIOH CONVERTERS ATV I 95 SQUELCH CONTROL f& r ATV 35.05 Kit W-tt PEP 2-Port ( 100& Wall PEP 3-Pftrt . I 7B.& 5 1 i P0 Wit I PEP*- Part I ft. K Wired erf)

Speech Scrambler

Communicate in total privacy over phone or radio. Kit features lull duplex operation using frequency inversion. Bdh mike and speaker or fine in out connadions. Easy hookup to any adioh and telephone use requires r n tfifflCt oonneotionl Easy to build 2 IC circuit Can also be used to descramble many -way radio s gnate Fin ish your fch off wilh 1ne iiondsome case & knob set. Matching case & knob se . Cf S 12 95

Circle On Reader Service Caro

T> TMF muling Intetttgenl iD'er Auxiliary ouLpul Eaiy io interlace Alarm monrlor input Telemetry reipon Ion Low power CMOS. 2 ma (& I2v DeLalltd application manual Programmable COS polar 11 les fie Dira tor A link courLety tones Synthesized iink romoto bane capability t> TMF muling Intetttgenl iD'er Auxiliary ouLpul Eaiy io interlace Alarm monrlor input Telemetry reipon Ion Low power CMOS. 2 ma (& I2v DeLalltd application manual Programmable COS polar 11 les fie Dira tor A link...

Leasing Available Hitachi Compact Series Scopes

Afl MIocN tcapM ' C** lar n Cl fllllMMlZ WII II w t> fl * tfr M* , IttC VC- Ca Pf.xom D * _ IPH9 M) Tt v im* m CHT You Awl ta* Hllocht Portable Scopes mm* WMMLJ Ow i, OC Oi* hK- V MflUHL i _ tl 1 rt. Aitvnot* rrvogmfcff iwion v 1 hwh). or *uw__ H 5 5 CHTB. _iv V-10 lOOMhj Ovid Tree* _11.*2 D*i*.*d Sm+mc _ IS9S - IMUKL OT. BttWH HOtwo- * 5 L*Xt*l 1B9S V.1DB im O i ciAt4t __ V WHt I7K KUri QvriWl__tWSrtrnj' - Jj MO' 1252 M Ft VtiKlV IDlI H H Tnrif f1 ffT H * ** ww * 1 i* All HOTO toeW pmtHi. ,...

Pd Converter

PC board foil pattern* (Parts placement* 73 Amateur Radio Today * August, 1991 29 Semicondtu t r Lin ea r Databook ( olum e 2. The A-D convener chip may be destroyed if more than 5.1 volts are applied to the input. R1 should be adjusted to divide the input voltage by three, so thai there won't be any damage unless the input is greater than 15 volts. The offset and sensitivity potentiometers allow the instrument to measure bipolar inputs, and to measure low level signals with good...

Fw Shown

All uj> t i transmiE stable signal inflS-toa MHz FM band up lo 300' excepi lurfii po er FM l that goes uplo ' j mi e FM- , a& above bul wilh at ed mike TM-4. Jortg fartge, hryJi power wilh vefy sensitive aadto section, picks up voices f 0' away 1 FM-3. complete unit includes case battery. aw ch, a enn a a r> d bUHMn condensor mike. Excellent Fioetity, very small, kil . FM- WT, s btrf Idly wiretf and tested E19.95 SMC, minia lure sensitive mike car-lrWg...

Controller

Fi ft a f I v a co ntr ol ter th at has solved control and audio interconnect problems between m ulti pi e ra d I os. Vo ur rad io ays tem ca n g row to m u Iti pi e s ites a nd stretc h f o r h und reds ot miles - and yet any radio can be fully controlled from any designated input. See the above article in the July '91 issue, page S> Although the Micro ATV Transmitter will work as shown in the article, thare are a couple of changes that will improve its performance. There is one error in the...

Kenwood Performance Plus

PB-25 26 & .4V 900 m ah 65.00 PB-1 12V IZOOmah Manufactured in the U.S.A. with matched tells, these Super Packs leyUjre short circuit protection anti overcharge protection and a T2 month warranty. All in sens in stock or ejvei lo tie tram jjutileritfd deaJGrs. CALL US TO DISCUSS YOUR BATTERY REQUIREMENTS. Adtf 4.00 Shipping & Hanfiiirtg. Connecticut residents add tax In Connecticut 203-264*3985- FAX 203-262*6943

Accessories For Counters

Telescopic shipantenna -BNC plug, WA'1Q High impedance probe iighl loading. HFa-l . . Low-pass probe. audio use, LP-i , Direct pror> e. general purpose use, DC-1 Hit bail elevates counter *or easy viewing. T8-70 Rechargeabre internal battery pach, SP-4 CT-9C o err time base. 0 1 ppm accuracy. OV-1 1.95 31695 S1G95 S > 6.95 9.95 S 9 95 . 59.95

Il

21 PRINT SPACE (26) 9 - COLOR CODES TO OHMS 22 PRIST SPACES(26)rM9 - AIR COIL INDUCTANCE 39 IF M 8 THEN 800 40 IF MS 911 THEN 900 801 PRINT SPACER(25) RESISTOR COLOR CODES 802 PRINT 810 INPUT ENTER THE COLOR OF THE FIRST BAND 811 INPUT 'ENTER THE COLOR OF THE SECOND BAND 812 INPUT ENTER THE COLOR OF THE THIRD BAND 826 X TS 82 GOSUB 870 828 T A 8 30 PRINT i PRINT PRINT 831 PRINT THE RESISTOR VALUE IS 332 PRINT 840 PRINT N - TRY AGAIN11 841 PRINT M - MAIN MENU B42 INKEYS 843 IF M N THEN 800 344...

Micro Control Specialties

Division of Kendecom Inc. 23 Elm Parkt Groveland, MA 01834 Create messages just by talking. Speak any phrases or words in any languages or dialect and your own voice is stored instantly in solid-state memory. Perfect for emergency warnings, club news bulletins, and DX alerts. Create unique ID and tail messages, and the ultimate in a real speech user mailbox only with a Mark 4, B& W BENCHER BUTTERNUT CUSHCRAFT DIAMOND HUSTLER HYGAIN ICOM KANTR0NICS

Flat Rates

C64S40 C128S55 C128D S65 1541 & 1571 DRIVES 50 Power Supply, Heads & Motors rioi included. 212D West Mjin Su lt 7 Rjpid City, SP 577C2 212D West Mjin Su lt 7 Rjpid City, SP 577C2 A500h 1000, 2000, A3000 & Comm. PCs S60, Comm. Primers & Monitor* 45. Figure 15- 45 Pans. We pay cash for used Commodore equipment (regardless of condition).

U U Y

Tl TCM3105JL 1200 bps half duplex modem chip 4,433619 MHz crystaE European colorburst frequency or2N2222h etc. switching diodes red for 04, green for 03 01,02.03 2N3904 D1.D2 1N914 or 1N4148 D3.D4 LEDs 05 1N40 1 diode C3 0.47 jf (0,33 to t pjiF can be used) R1 hR2 100k trimpot B3.R10 10K R4 18k R5 R8 4.7k to 12k (tOk nomimal)adjusl for keying HT (optional) Most parts are readily avai lable, with the exception of he modem chip and crystal These can be obtained from your local Texas Instruments...

Ff

The AEA PK-232 multi-mode data controller remains the most widely used radio data controller in the world. More hams own the PK-232 than any other radio data controller, and AEA's hard-earned reputation for quality and service keeps them coming back. The '232 gained its popularity with features like these

Circle Oh Header Service Card

PC GOES WEFAX 3 0 IS a professional fax reception system for tn I BW PC It includes an AM FM demodiiator soft wars cassette tutorial and 325 page manaur Ctnetfc ttis pan al list of our advanced features PC GOES WEFAX 3 0 IS a professional fax reception system for tn I BW PC It includes an AM FM demodiiator soft wars cassette tutorial and 325 page manaur Ctnetfc ttis pan al list of our advanced features Rea uOlo 1260x800*256 Unattended Operation Coiorutaton Zoom Pan. Rotation Conlrast Control...

Gnd

Volts at pin 7 of U2 that is a good starting value. When you begin listening to actual packets, if they are not being printed on the screen, you can rock Rl back and forth untn you start copying packets. It helps to have a nearby friend send a bunch of beacons or unprotocoled packets for this. Andy has written a supplementary program called PMPTEST that simplifies this process b giving an indication of how closely adjusted Rl is. Using the program and listening to on-the-air packets will Liet...

Gate Times

Useful ham calculations you can program yourself This is ihe fourth, and last, part of this series of articles. The Ham System has grown to be quite capable pf saving time and aggravation for the user Let's add the lasi modules to the system. This month the MAIN MENU will grow to nine choices. Added will be Liisi month, you added module seven, which gives you the resistor color codes when > ou enter the value of ohms required. This month, with module eight, you get to do the reverse Enter the...

Iee

* S ftw re rrjn fr nil r i r loy cOflt Ctfi for PIT w - ( .is, -i Wtffi . - - i il h - i . es dir& cUy h ccnlro ef, radks or uiier supp4k)d approved fr-l'-phon Ouplti Vdu simply won't find a more llejfibie anrt powerful hifdware sctfvior t .-. iof generating DTMF lorn--. 30-DAY MONEY-BACK GUARANTEE. vV- I > guaTHnlei your compistc wlisteclion wrlh DELTATONE < n 30 days or felurn 1 lor your money back Ifs your opporlumly to put l o power o1 DELTATONE 2Q 10 *ort< lor you - fllSK FREE*...

Ac Electromagnetic Field Radiation Measurement

Decoding the number groups is sample, a typical frame of telemetry consists of eight iour-c git numbers. An actual sampfe ot data copied in I ale May tookedlike PPPPRS14 7007 7116 7224 7316 7409 7500 7600 77, To decode The data, refer to Tatrie 1 The first four-digit number was 7007 lh The first digit defines the channel status. A prefix of 6 identities a general status, while a 2 identifies a command status. The 7 is iikely a general status. The second digit, a 0, is the channel...

All Mode H F Portable

BASCOM AVENUE SAN JOSEt CA 95128 8 reJiy On Otl. ir* 3 DPDT2A relays -5 & * culpas, t se +m him lo roiad btam CS 8 S 99,95 Ttwn voie* Mnmrm t aia tti inputs - 8 S* Relay OfVpffSW *PK 1 Progrum i Contra fol Ultra via Pach*t or ToE Une + Psch E tO VokCt BBS, Ftih 2f d CB4 * PK0. En . 4 H. d tp cobf* IQ FK& Pk1 . S99.95 Rot r control An ,iog io c itai CQDv rirtr u ttHrthC5 w ice afing il j*emjiTic . OJg ams io oppaf uc bflii He iM* Bob Winn W5KNE QRZ DX P.O. Box 832205 Richardson TX...

Special Features

* SOLtD STATE ELECTRONICALLY REGULATED * FOLD BACK CURRENT LIMITING Protects Power Supply from excessive curreni & continuous shorted output * CROWBAR OVER VOLTAGE PROTECTION on all Models except RS 3A RS 4A, RS 5A, RS 4L. RE 5L * MAINTAIN REGULATION & LOW RIPPLE at iow lire input Voltage * HE AW DUTY HEAT SINK CHASSIS MOUNT FUSE * THREE CONDUCTOR POWER CORD except lor RS 3A * ONE YEAR WARRANTY MADE IN U.S.A.

Simply Connect Private Patch V To The Mic And Speaker Jack Of Your Base

PRIVATE PATCH V is the most versatile interconnect available today. A built-in keyboard and digital display give the user full control of all modes and features. PRIVATE PATCH V can be your simplex patch today and your repeater controller with duplex autopatch tomorrow. When you compare the features and ease of installation, nothing else comes close FOUR SELECTABLE OPERATING MODES 1. VOX ENHANCED SAMPLING A simplex mode permitting mobile break-in. The sample raie is reduced when the land party...

Buckmaster Publishing

Whitehall Route 3, Box 56 ber of entries from those stored internally. An example of the data command syntax is Data TF 3 WS 5 WD 2*' This wouki display three readings of external temperature, ftve readings of wind speed, and two readings of wind direction. Entering the command PR, displays how ihe data is being stored An example of a reply to a 4tPFT request might be PROGRAM R10M TP TF A15S WD WS 7913 Samples 1 Day08 00 00 This response to the JiPRT' command would tell the user thai Ihe...

Pc Board

C vT a COWOUCTM . - J W A3KEB Fi git re 10. Assembling the discone. the long rods down along the steel pipe. Place the plastic electrical outlet cover over the steel pipe and thread on another brass nut. Push the electrical outlet cover up the pipe and spread the long welding rods until the bottom ends of the rods are 215 span from I heir opposite rod. Adjust the nut positions as necessary and tighten the nuts to hold the electrical outlet cover in piace. See Figure 10. I used a hot glue gun to...

Buy With Confidence

Michigan rodents piease add sales tax or supply your la* 1 D number Whiten purchase orders are accepted Irom approved govfimm nt agencies and mos wall rated ftrms at a 1G surcharge for net 10 billing All sales are subject to availably a -fiance sri ver ficaiion r-.zts cermt and speeiiicai-ions art suOitici So change w.ihout notice AN prices are in U S dollars Out of stock items wHi be placed on backorder automatically or equivalent product substituted unless CEi ls instructed diherently A S5 00...

S

hts NEW campa cl Hash assortir corres Irom a U.S. manufacturar o* cameraS-Unfl operates on 3 Voc and measures 2 MT X 1 t 4. Ideal lor use as a strobe, warning light or attention get-tor, Corrpleie with i na truel ton on how lo wke. CATK FSH-1 S3,75 each 1G or 3& . 0 ULTRASONIC CERAMIC MICROPHONE TRANSDUCER Panasonpc (Matsushita) Ffl RC3K40K54 An ultrasonic microphone consisting of a bimorph type piezoelectric Co ramie vibriitor. Ideiil lor burglar alarms, auto doer openers, llow rate d&...

Cercle On Reader Service Card

Listings are free of charge as space permits Please send us your Specrai Event two months in advance of the issue you wanf it to appear in For example, it you wani it to appear n the January issue, we should receive il by October 37 Provide a clear, concise summary ol the essential details about your Spectat Event Check HAMFE T on our BBS (603-525-4433j for listings that were too ate fo get into publication.

Aug J

FL & gh Anaieur fi io d GriltP' Jaf 9JT< -v 3 f wf mmfrne efforts lo p-ese-l he annual Greater Jac sortv'e Amateur fiafrtfCortipu'er Show ar ihe dowrto* 3 nme Osoom Convention Center Swap utiles FCC Exams and Aiiciiofi be hetd on Sun Admission S5 Rese vec swap 'ables afe 15 < y Ihe met-k rind. Fn T-up iS 2-7 PM Sar set-upi& 7-9AM. Ope* for the general public from 9 AM-5 PM Sal and 9 AM-3 PM Sun. To order advance tickets, send an SASE with pa meni lo Greater Jackscnvtite...

Same Outstanding Features

t ear UVar n-.i - Ciwtpfetel. * A WUST toral1 C-amniK ort *. 4 3 AViP un i LF& ea F w A > Ons fVtphttlte VuftuptgDnws.ff Pack el ad.o Ths W e Last cti Supp Vou B rPurrtwe* O 'H CJI ce aniFte WM iix 10 M I'jnflnEiris fTheCiaaVOTton P Smapjy Cows w. iusUPS Call lor your NEW FREE 3b pnpn i nlMPfl < ' kpogdHy < or Ami d. Cor-.mndors arr ifiu T h c imlcig . -a . . . i ffipTfli . -merl enms ridrts nfiy--ades. isgnotlicp oduci',. 1 pew - supply line iind nrfiar oriiiwid pndudn vou v ON'T Und...

All Digital Operating Modes

The PK-232 MBX includes all authorized amateur digital modes available today. Packet, Baudot, ASCII, AMTOR SITOR (including the new 625 recommendation) and Morse code, as well as WE FAX (receive and transmit). Other features include the PakMail 18K byte maildrop system with automatic normal and reverse forwarding, NAVTEX AMTEX reception, KISS protocol support, binary file transfer and more. Also included is the TDM (Time Division Multiplex) mode for SWLing that few others have. No other...

Estates Ek

Transceivers, Amplifiers, Antennas, Computers, Tubes 708 475-7802 739 Dobson St., Evanston, IL 60202 The best rates, with the best readership. 615 S El Camino Real. San Clemente, CA 92672 Tel (714)498-5784 Fax (714)498-0568 PC SWL contains the hardware, software instruct ens ano frequency l sts needed to allow you lo receive a vast vanity of digits broadcasts transmitted over shortwave radio, All you need is any IBM PC or compatible cowpLiter and an SSB shortwave recei er. The product consists...

Fantastic M Fm Transceiver

Ramsey owaks the price bainer on 2 meter rigs Hone's the ideal rig for field days, bam Tests, vacations, second cars and packet (it even has dedrcated packet connectiunsi. Si expandable diode-programmed channels, 5W RF output, sensiuve dual conversion receiver and EASY assembly. Why pay more for a secondhand old rig when you can make your own for loss. Have some fun witn your own truly AMERICAN-MADE FM rig This kit comes COrii-pleie except for tbe case, mike and speaker IOOM or equal...

Circle On Reaper Service Card

Couple of other hams and I have started ATVing in Butler County and are having a bait, P5 audio and video is an around. This is the most fun I've had in ages. I just finished setting in a 10 loot parabolic to do EME and shuttle downlink (to rebroadcast on ATV) and am building a couple of transverters. I also bough a Kenwood 531A 1 2 GHz transceiver, and am building a small 24 parabolic antenna for thai. To think that 1 could be missing ail this fun while worrying about upgrading and build i ng...

D L N

THE INDUCTANCE IS FN A ( L) MICRO HENRYS When you want to use HAM4T just place the disk into the drive and type HAM4, then press ENTER. GWBA5IC will execute, and HAM4 will load and run The bottom light bar will be extinguished, leaving a very professional appearing menu. The system has grown over the past few months, I sincerely hope you find it as useful as I found it fun to write, ff you would like for the system to grow more, write me, I would consider doing an update from time to time. For...

Speed Radar

Jew uw-cosi microwave Doppler adarklt cIocks cars. pJanes. boats worses. i> i*es or any large moving ob-sct, Operates at 2 with up to I 4 mile range. LED digital readout ii splays speed In miles per hour, nelers per hour or feet per second Earphone output allows for listening 10 itlusl doppler sniff. U3es1wo Mb cot- .fr carts for antenna (noi included) md runs on i2 VOC Easy to build i l rri crowave circum-.' PC slrtpllne iil riLluiteS iJwIivery AB3 plasty tise fhrh speedy graphics for a...

A

Li si p'ice S549.95 CE price S259.95 SPECIAL 10 Meter Mobile Transceiver * Digital VFO Full Band Coverage * All-Mode Operation Back lit liquid crystal display Repeater Splits RIT * 10 Programmable Memory Positions Fftujuancy Coverage 28 0000 MH to 2 9 6999 MHz The Ranger RCI2950 Mobile 10 Meter Transceiver has everything you need for amateur radio communications. The RF power control feature in the RCI295Q allows you to adiust the RF output power continuously from T watt through a full 25 watts...

Circle S On Header Service Card

Water tight-strike powered. * See if grounding protection is making a difference - Available for power phone lines too. The solution to most interference, mtermod, and desense problems in repeater systems, 40 to 1000 Mhz tuned to your frequency 5 large helical resonators *Very high rejection Low noise high overload resistance 8 db gain ultimate rejection > 80 db GaAs fet option (above 200 Mhz) Cast aluminum enclosure N, BNC, and S0239 connector options Typical...

Pennsylvania

Authorized factory sales and service. KENWOOD, ICOM, YAESU, featuring AMERITRON,B& WpMFJ, HYGAfN, KLM, CUSHCRAFT, HUSTLER, KANTRON-ICS, AEA, VIBROPLEX, HEIL, CALLBOOK, AfiRL Publications, and much more, HAMTRONICST fNC.T 4033 Brownsville Road, Trevose PA 19047, (215) 357-1400, FAX (215) 355-8958. Sales Order 1-800*426-2820. Circle Reader Service 298 for more information. DEALERS Your company nam and message can cwitaln lip lo M word for as Utile as 420 yearly (prepaid). Of 210 for six months...

St

Voltage between 0 to 10 volls (when configured for low input range) or 0 to 100 volts (high input range) can be measured. You can also configure the V-toF board to function as a temperature sensor. Each V-to-F board hooks up to one of the input pons of the METCON-1 board. You just read out the frequency on the main memory map output In the case of voltage, just divide the frequency by 10. To get temperature readings you must divide by 10 and then subtract 100. The voltage-to-frequency scheme...

K

Tinning and soldering the top of the PC hoard Figure 8. Tinning and soldering the top of the PC hoard nor difficult to tin since it is made of steel, which doesn't conduct heat away as fasi as copper or brass does. Cut 1 of the outer insulation off the KG-8M coaxial cable, separate the braid, and then fold it back over the cable insulation. Insert this end of the RG-8M cable into the non-tinned end of the 30 lamp pipe and push the cable through until the braid is flush with the tinned...

Superior Filtering

The 8-pole Chebyshev filter in the PK-232 was designed from the ground up to work on HF and VHF. We didn't just add some firmware to a Packet modem to create our multimode. Our modem was proven superior by tests in Packet Radio Magazine over all the others tested. Read the fine print You just can't beat the PK-232 for performance, quality and integrity. 45,000 PK-232 owners can't be wrong ne only data controller designed from the ground up to be a true muiti-mode, the PK-232 s tuning and status...

Oizio

ProtriFurn quality metal tape in C-60 cassolios (30 min, per sida). One of Ihe finest brand- ama lapes on the r-jrket. in durabfe4 dea p sinC transpon r W-anisms. Recorded and bulk erased, the 'ecord-protect iabshavec en 'er tr ed and therefore, rwi to be taped ote r to re-fftCO'C Au-doptitas wU 3ppreci3'e trie v di dynamic range of this lape II your cassette deck has a metar selling you wilt hear the dtflflrence. A real bargatnl CAT C-60H 1.25 each < l0 fori 10.00 mw - - , _-

Nc

Figwre 5, An alternative interface circuit tha simplifies the circuity. Thanks to M. G, D. Vermeulen ZSI HQ for this design. Figure 2, FT-980 CAT typical port circuit (pan of the radio). software development, with a power source of two 9 V batteries, which I switched in and out as needed. When the last line of code was written (though we who write code know that no such time ever comes ) and a couple of operating months went by , 1 wanted a permanent black box with only one batten to mess with....

Cw Callsign Monitor

Sounds Alarm when it Hears Your Call * E njdy si lent C W mon iiori ng 1 Automatical ly tracks code speed 4 Built-in audio detects T Does noi require perfec code 539 coinp eie kit S17 FOB only (includes complete techntcar data) Sounds Alarm when it Hears Your Call * E njdy si lent C W mon iiori ng 1 Automatical ly tracks code speed 4 Built-in audio detects T Does noi require perfec code 539 coinp eie kit S17 FOB only (includes complete techntcar data) - Corttipynenis may be mounisd or toit...

Call Or Write For Complete Catalog

SHF 1340 Complete Transferrer SHF S Y STEMS No rune linear transverters ano transverter Lits lor 903 1269 Z3W 2400. 56MHz AIuse2m gl3SV Kits nrjuoe minar ano L O PC xahk xli ano afl oomponfi-1s Bu Lfiitl iikJuO IFJDC sttrtcnttiand, connectors and compact low pro1iie kmj Oirwr frequency options m amsteuf ba d av& iJafcHe SHF 1240K 1 96- 30Q MHi lDmW Kil S149 Built S355 SHF1 69K i26fl-l27 Qs ArMHjeL IQmW Kil 140 6uifr J55 SHF23 4K 2304-2300 MHz lOnW Ki 205 Buill 325 SHF 2401K 2400 MHz Hod 5...

Ug

Jnovk tr. gqiO UG 21DJ99 3 UG JIB 9 3 3 UG-I4 AVIJ LiG S3B-U UHF Mate & .er Tenor USA 50 Reducer for R& 59 MIN b 2t< 214 Jige& otf, 5 00 Male Pin for 991 90 6 8214 frts uG-2 ID U & UG-21BAJ N's 1.50 Mate for RG-S * th 9913 m H Male tor RG-fl w th 9913 P. n 5 N Ma ic to SO-239, Teflon & A 6 uu N Fe 'viaje T& PL 255 Teflon USA G 00 THIS LIST REPRESENTS ONLY A FRACTION OF OUR HUGE INVENTORY THE R,F. CONNECTION 213 North Frederick Ave. 11W Gaithersburg, MD 20877 ORDERS...

Hid

Ygwri* .i. fa J PC hi hi rJ foil pattern for the home station interface with watchdog timer circuit* (b) Parts placement, user out < if the keyboard (This will also happen if the radio becomes unsquelched accidentally, or if i he modem falls off the parallel port, allowing the CDT pin to float HIGH.) 1 n urban areas it can make things difficult The only solution is to wait until the channel activity calms down, or pick a 1 ess busy frequency. PMP has been checked out on a fair sample of IBM...

Communications

Great Value. 25-Dav Money-Back Guarantee 3 oil-Free Service and Support No Credit Card Surcharge One Year Warranty 1000 Channels. 8-600MHz, 805-1300M Hz Continuous coverage (except UHF TV 600-805) - Antenna attenuator switch, lOdb. * Manual tuning knob. Earphone jack, 15mm. * AM, FM and wide band FM tuning modes, -10 Scan Banks, 10 Search Banks. Selectable Priority Channel. Selectable Search Increments, 1 . - 4 A A Nr. Cad batteries included. External Speaker....

Moul Rd Hilton Ny

Phone 716-392-9430 - FAX. 716-392-9420 at a fraction of the cost of comparable units - Very low noise QJdB vhf, Q.BdB uhf - Hi h gain l3-20d9 depends on freq - Wide dynamic range - resist overload - Stable low-feedback dua gate FET Sp cifr rjrvng mng* 26-30, 46-56 137 50-177. 2 IC-230, tOJ- 4 r , w & OG 960 MHr - GaAs FET Preamp Srm to LNG, except designed for low cost & small size. Only 5 fl'W x VS ff'L x 3 4'U Easfly mounts in many radios. luning range 25-35, 35 55, SS-90, 90-120...

Your Tower

Are ycu too scared or too eld to climb Never climb again with this rower and elevator tram system. Voyager rowers a re 13 and 13 inch triangular structures stackable to any heignr ih 7 1 2'. 3 IM or 10' section lengths. Easy to install hinge base waik up erection. Nexc plumb tower with leveling bolts in base. Mount rotor and large heavy beams on Hazer tram ana with o.ne hand winch to top of tower for normal operating position, safety lock system operates whiiffraising or owenng. At last a...

Flr

The-air surveys indicated that the FT-980 radio is a good lest bed for circuit development for other CP 1 radios on today's market. So. even if you're not dealing with this specific configuration, it's worth it to read on Tie result is the circuit shown in Figure 3. An old friend, UK an LM324 quad op amp, does the job with two of its amps still unused. Mia acts as an inverting, saturating differential voltage comparator with a Schmitt trigger personality, and Ulh does the same thing in the...

Commodore Haw Programss

Disk stdes over 200 Ham programs 16 95 25v stamp gets unusual software catalog of Utilities, Games, Adult and Briiish Disks. Home-Spun Sottw.ire, Bo* 1Q64-BB. Estero FL 33928 BNB917 JUST IMAGJNE your own OeaulMui Blue Ridge mouniain top OTH selfjng my 323-acre Christmas iree farm alt or part trees opt.onai KK-WW. Fioyd VA (703) 763-3311. BNB956 CUSHCRAFT, Barker & Williamson, pow er supplies, rotors, baluns, center insulators, ladder line, coax, connectors, surplus tubes. ATKINSON A SMiTH....

Introducing Ts Mouse

Jt you tan pom ar-d cfcfc wm a mouse, yw-t are alrpaify an aiper* vffln TS MOUS POWERFUL Y T EASY TO USE wfy jrJtfniUd memory eapae*y to yew i ans *** tv urns w o w Sdtoc* tfw ta*Krtj ftrouft ocrent hmuency by Aimpty pointing nO cUijng. Ouc and Memory Me a-je enl and Contrai of yotr M usa yem xnputw s i m r stHJftgs up lo ta tgbas oopabiity. from a standard PC wfth a monochrom dismay Q a 406' madiine wim Supw-V& A 00 tow Cotof acLkaii - indydn* n fit- o poplar frequencies. HARDWARE RE QUI H...

The Next Generation In Highperformance Hf Receivers

Once again JRC breaks new ground in shortwave receiver design. The new NRD-535 has all the features SWLs and amateurs have been waiting for. General coverage from 0.1 to 30 MHz in AM, USB, LSB, CW, RTTY, FAX and Narrow FM modes, Advanced ECSS operation for phase-lock AM reception. Variable bandwidth control (BWC). Tuning accuracy to 1 Hz possible with direct digital synthesis. 200 memory channels with scan and sweep operation. Triple Superheterodyne receiving system, Superb sensitivity,...

Hardline Matching Transformer

The ZD Engineering quortor-wavc matching irom Former is d tgnod to provide an accurate ond broadband bnpedbnce ntifch btfwsen wv low lou 75 Otvn CATV hanflin and a 50 Ohm bod. In oddilbr. it prides a ratable ond ineApsuive TO od of cfloJiing typ* N v SO-239 McfcKng irora vfTwn ore bu Jf fa ihe fofloweng Ml MHi 222 MHz. 40 MHj 903 MHz, one* 1294 MHz Units be tow 200 MHz arc buiJ with type N or 50-239 oonrwtto w+iil all others arr built with type N only, Unib arc built la fit 1 2, 3 4 ond 7 8...

Ra Enterprises

RAI Enterprises has released a new PC software program, Autolog Plus II.1' This program is a unique blend of a highly sophisticated station fog and a fully programmable CW autokeyer, The log features four programmable on-screen time zone clocks, a 200-year calendar, a personal database and a notepad database to keep track of all personal data. Other features include a DXCC database, beam headings, QSL tracking, custom screen colors, on-screen quick notes''to keep track of frequencies and calls...

On Reader Service Card

Repeater identified Co il tes I Stations Sil Alarms Re mute Te Ec me fry Weatfier St niions Multiple Languages Kmeifjpucy Announcements Add a Recwded Natural Voice to YOtiTsystem or equipment. Voice vocabularies or multiple phrases up to I minute iel a Natural Voice is saved in Non-Yo tfi. E-Prom iuemo y,(lf power is removed the rfti& prdtngs will noi be lost). We'll record your itej& age(5) in a fbale pr feriia I e voice - o r - v ou can re ct> rd the library by using ihe optional...

Grv Antenna

Ms MW MULTlBAMb tl iHwrVw ,in Hi Mnd 13 S-M fitH i i--- ' i-i. - 'n i MM, i fr .i tn-Li iiLc a r I p i J iltfnna LUftJ , ri due- tfltf KflftFl gmyrrQ Th r.DDG- carrtirLilwr I' .1 < , r . II ., , I i '-el .J 3 arm KW rw> nJ 3C T-r n T hhhrt rnonintt on 4l> W AmaiDur Eiarl rr C -ugr C -- '- * in Mr , , > h < * - 5 no r -tPc. ir' ans r FftC -.Mr- r pptfwjr'l .l n- r-t1 (hi 3Q0 - P inieaitfansiiM n lirii **.< '.a h -. igHdnqtHitg < & BJi fwr*. Ifitfn ti M tffTi v -escfj kr Hq&...

Signal Analysis

The first multi-mode to offer SIAM (Signal Identification and Acquisition Mode) was, of course, the PK-232MBX. Indispensible to SWLers, SIAM automatically identifies Baudot, ASCII, AMTOR SITOR (ARQ and FEC) and TDM signals, then measures baud rate and polarity. Once the PK-232MBX is locked on to the signal, a simple OK command switches to the recognized mode and starts the data display. You're even ready to transmit in that mode if applicable. The PK-232MBX makes SWLing easy and fun, not...

Aug Id I

HUNTSVILLE, al Humillo Hemtosi 991 will be held hl ihe Von firaun Civic Corner Round-1 he-clock sscurrty provided. Free elechicily in each booih. Hunlaville Hittan directly acror Ihe & lreel Contad Huntavllfe Ham test, lnt< r 2804 r Memorial Pkwyrt AMARILLO, TX The Panhandle ARC w sponsor Ihe P A R C Golden Spread Hamtesl TcKe> 5 56 in lHJvitic ai he doot Taties JE Exams ooit> i ys vVheekte accessible Taf r on 146.920, ue 940 and ero C& rvact PARC PO Bo jt 524. Arr.inih TX 7VOS ot...

Reviews

Your software window into the world of digital communications ________WAlR Add telemetry and conlrof to your packet station WB8ELK 46 The Kantronics KTU Telemetry Unit with Weathernode EPROM Remote weather observations via packet WA3USG Poor Man's Packet software TNC for PC compatibles Ccver photo by Larry Dunn. H's like being ihete-right here inoui Liifices How J u st lake fldviinliigc of our FEEDBACK ciarJ on page 17 You'll notice a feedback number an (he beginning of cat h article ind totun...

Made In The

SEND FOR FR CATALOG AND PRICE LIST In U.S. & Canada Calf Toff Free (800) 221-0732 * IN NYS (718) 961*2103 * Tefex 51060 16795 FAX (718 461-1978 73 Amateur Radio Today August, 1991 41 ajt tottitj A jji H P* Ai& ortmfnl He Ship VrxiZl 2nJ IV ajt tottitj A jji H P* Ai& ortmfnl He Ship VrxiZl 2nJ IV Al. -tif i J *J JJI f.F nnnl F t-4i iJJ 3

Public Domain Cat Seed Program

This may be freely distributed and exchanged It ray be rewritten, modified, changod ar.d or expanded* Indeed you are encouraged to do eo to make it work with your particular radio. You need not even give this author any credit. While this program is originally intended for the YAESL(tn) FT-9fl0 transceiver a rareful approach snd rewrite should make it a setd for t e development of most other haz radios or. the caricet. One request share your idear with othare. Tri is an still 3 71 esccitXng...

Ar

AM, FM, wide band FM( & BFO for SSB CW. Includes AC DC pwr crd. Antenna, Mntng Brckt. One Year Limited Warranty, External Speaker, Mobile Mount, Extended Warranty. 2 3 yrs. Mobile Mounting Bracket, RS232 Control Package EP2U ) 2.00 MS 190 19.50 65 75 MM I 14.90 SCS2 295.00 Extremely compact size. Continuous coverage Attenuation Programmable by Channel. Manual tuning knob. AM, KM, wide band FM, LSB, USB, CW modes. 4 Scan and Search Banks, Lockout in Search. l S232 control through DB25...

Accessories

* Available for the .IA, 220Mlli, 440MHz, 902MHz bands. FCC type accepted (vhfand uhf commercial bands). - Rugged exciter and PA, designed for continuous duty Power output 15-10W (25W option) on 2W or hnband 15W on 220MHz 10W on uhfocSC.-MH- * Accessory add-on PA s available with power levels up to 100W * Six courtesy beep types inc'jding r*o pleasarfL sequential, mufti-tone bursrs, - AUTOPATCH erther open or closed access, toll-call restrict, auto-tfcscoonect * Reverse Auto patch, rwo types...

Packet

1 OA Mn A11 About VHP A m ateur R ad va by WtJUam fhr WtSAl DX pT. jgalliifl. VHK yl i nd ijuad beam*, rrpeaiers and how ihcy wi'rrk, OSCAR uicMtttb . rd how to uk them 11.95 03R02 RTTY Today by Have i nm K4TWJ Only up-to-date R TTY l> mk in exi Mcncif Covers nJ I (iMU of ft'lTY Most mniprobenMvi' RTTY gunk ever pub-Il oJ Fully iUuAaAod 11 pages W.50 iFK IL The Basic Guide lo VHF UHF Ham Radio ht FJrard H Soil This pnr-idn j fir rue construcuon jxojoctv ftu the QRP < .yc aiar, fnirn a iimpk...

Vlth

Irunk-Moun table High Power Dual Band VHF UHF Transceiver fheFT-5200 (orFT-6200) Dual Band Mobile Transceiver is more than just another pretty face. The from panel can be easil removed u ithout tools or fuss and put into yourpockei when you leave your can And lor extra convenience, an optional r emote cable kit is available so ou can 1110lint the control panel anyu here on the clash and ihe transceiver underneath a sear, in the glove For extremely powerful communications capabilities 50 watts...

Circle Os Reader Service Card

CALL 1*600 KILLTV TO ORDER RFl FILTERS THAT REALLY WORK Now used by FCC during investigations The World Famous BX cable-TV filter S24.95 TP-l 2 Effective standard telephone filter 16.95 30 DAY RETURlM-FQFi-REFUND GUARANTEE Rt> pi ice Uni hp'at (e E cimnie Tefepnones Wiin Our NEW TP-XL Fiitsred Touch-Tone TeJesHone S49.95 Prices subjecl to change rrnxjt notice StiiEkpfog anc handling eitri 800 number for orders only.,. For engineering help, (512) 599-9420 or (5t2)...

Mfj

Now you can eliminate or minimize TVI problems caused by harmonics with this new MFJ Low Pass Filter that connects between your transceiver and antenna. It's the best way 10 ensure thai your transceiver does not cause harmonic interference to your neighbors' TVs you can operate in peace while your TV watching neighbors completely miss out on the fun of ham radio. Handles full legal power from 0 to 30 MHz. SWR below 1.15 1 to 30 MHz. High harmonic attenuation Low insertion loss. One year...

P

Ckjr& ejftt Tht*tnr totals don m courts Durera kun orslv ti *c vife Onfft14ft fttoi pjy TV adAon-, i i& es or lM9E BtiDniU9 6'HkJflaW syr-i s und S jO 112.45 WkmcuCibkeHvt Iiookt Ir. K ScrjmWinq N ws M& iilhiy nil ail ir a on it* iwv, Km Vaml'a de crgmtm t wtncft em ulitc B-MJC. wcii. Plu , jrd O iart ti g 9Vyr W nevv cawog S Scrnm ling News, 1552 Hertel Aye. Qu tala NT, 14216 COD E ARE OK (716) 874 2 8

Ground Piane Antennas

CK-N > WOviSA Aocep d MA add 5 sales a*) Send payrticn to Cellular Security Group 4 Getting Rd . Gloucester MA 01930 Or charguby phone (508) 281 8892 * Pugged ConslructiCfvTvsled al Ssa * Sftil Mounting 3 Tower of Masl * E tar> aed Dcudl& Zepp 34* 0 * E aGta - Tjres Outi' Ba -d Craer ir M 1-B00-& 74-2B30 VISA G OK HoE tnCnvg* BROADCAST TECHNICAL SERVICES i I Walr g S(. WariMieU, ' 'A CiOW * Pugged ConslructiCfvTvsled al Ssa * Sftil Mounting 3 Tower of Masl * E tar> aed Dcudl&...

Gosub Gsu Goeub

Release radio nd shut down coh port CMD OiiOrF GO UB 6000 100 FRIIiTil OKii 111 CLOSE 1 120 PRINT PRINT PRINTRadio released - COM I NOW CU> SZ0 -Pr& graa complete,., 130 E*iD 1000 ' INITIALISATION 1010 OPTION BASE 1 ECHoS f 5) tcho is same length aa a command,, b o tes DIM STATUS*(14B) +The FT-9A0 complete utatus stream, 14 0 bytes C'tiD5 11 'Thin could have been a. DIM CMD 5) , but this worXs too,, to execute CMD OiiDFF CHfiS f0)-CHR i0> -CHRS t0) (0)+CHRS(0) 'Oti-OFF CHD Status ALL...

Maxrad Chrome Coil Sehcs

Dua Sand iimty dB 31 95 MAXRAD MOLDED COIL SERIES ve 144 17* MHi 3o6 Economy 22 9c * X-450 MHi MG DUc* 29 MOUSTS twdy ixhint wiih coa* arid PL259 10- 95 Trijnk 1,3 mourn *7thcoa* arid PL259 is 0B Chrome ntagnet mounl 15 11 Cnrcime rnagnei mtHinr wth r oer boor 50 3ImJ( magne t moun t wrttr rutool 2 36

Return

'Print a.I status bytes on screen in Hex-., PRINT PRINT STATUS Input in Hex (Compare with your manual) FOR S L TO 46i PRINT HEXS(STATUS I(S)) NEXT S PRINT PRINT PRINTflytea 2 thru 5 hove yield Frequency FQR 2 TO 5 PRINT HEX (STATUS (Si)j NEXT S RETURN SWITCH TO GEJ.'ERAI VFO, AM AND WWV OH 10 KHz CHOICES-GENS R . 2 G05L-3 50 00 IO20 1030 104 0 1 0GQ 107C 1080 1095 1090 1100 1110 1120 1130 2000 2010 2020 2030 040 2050 20 0 2070 20SQ 2090 2100 2110 3000 3 010 1 020 1030 3040 < 000 4010 4020 030...

The Multiple Receiver Solution

ijttfidaWp ii 32 Charint- try J A flincf Cifrts LEO tndtr ors oi COR m Joletl Signjis Built in CaUbnilor Hi'inoif Vwieii indicator Pinn d OuE Aln X E UoLjlJiM Sided GolcJ Plalfld44 Pin C< vd uiJt. It ied and calibrated with manual For ITIO'B rnformaf go call or wriifl-

Steel Keys Sealed Gold Contacts

An ultra high quality DTMF Encoder for absolute reliability and function. Software-Driven and Keyboard Programmable High Capacity, 30 Digits per Location * Side Tone Won-Volatile Memory Auto Test & PTT Disable 5-10-20 DPS, Pure Signalling-No Pops Speed Adj Pause Adj Digit Expand Wait Send Wide Operating Range +160'* 6-26 VDC Multi-Function Programming + Emphasis is on Quality & Reliability Pollock Pines, California 95726 (916) 44-5444 FAX 644-PIPO

Aluns

X MM S 01j3t 1 t DCW Cuirrnt-Bfllun tlf. Y J -4K Current-type Bmto IWun 1 14KW S24.H y ftfFinrte ftalun 4 1 Gprn-wir to cos C rerf-fiiiun t h 95 Free 80 pige Dlscouni Catalog, Everything For wire Antennas, connectors, coax. Allow 4 - 6 weeks for Bulk mail delivery of Calalog or send 32 for catalog by Priorily Mall. Mention ad tor these price*. Prices are subject to change. ADD SHIPPING-Call for COD Vlu & MC welcome. Give card eip. date, tiqnalure. V A ree'dents Add 4.5 Sates tax. See ad J n...

Circle On Reader Servfce Card

Thouuht yau cciuldn t afford really good QSLs These high oualiiy RAISED PRINTED cards can be in ymtr hands for prty each Your choice of 4 colors of 67 lb- hrisiol stock Gray. Yelbw. Slue, ivory We print in blue ink p the format shown If you don't want the State outline, we can remove it and make the callssgn. larger to baferice the card NO EXTRA CHARGE ior AflRL logo, or extra weirding if we have Ihe room Order with confidence these are the nest valine in Ham Ratiio today1 You Satisfaction is...

Shorty Allbander

THE P after MATCH Fon ANTENNA TUNERS WITH A BALANCED OUTPUT THE P after MATCH Fon ANTENNA TUNERS WITH A BALANCED OUTPUT Htw Uin Qbqe itTjndKj v t WW4 PK Ctr-nP'iKf IPCT 'Jjifrti * - fl c tri wwwr n 'jtitt (j.i'OI Miv m M t W lof title' st pi*1 lu mes cufflan TTHJOgfl i-notdag plloc qu maerjj ti - W TT IliQlKy . Tt'iJC't ' Ortfji S- '- '--i r-'i- r Di Ltof-i' -is-dfe F 1 - ,J- -S '0 Wif Ot f rn* h I I i v h*i Tkc JU-MNDtn m POU JillCUPVT KhjHI Iff* rrtvntvi it lully H'j Ti-itjl 1 Own l S riw...

Helical Resonator Preamps

Preanips with 3 or 4 section hetical resonators reduce Intermod A cross-band Interference in critical appl cations MODEL HRG-f*). vbf, 54 uhf. 'Specify tuning range TSfr 162, - For complete info, call or write for FREE 40-page catalog. Senti 5 Icm oversells a t maii For casual ftiftrflfit, crt& ch reader Borvicft allow et+ks, - Order by mail, fax, or phone (9-12.1-5 eastern time) * Min. S3 S& H charge for first pound plus atfd'i weight & ins. * Use VISA, Mastercard, check, or UPS...

Radio

Ik U- rJL '4.U. -. - 1 IMsll L u., , i i11h thilml ** II . , - il I . .p. yaiLu v tVrv. IkJtarbipKw Iirr * v _ . - L . H IM f I1JTJ * IH3 Lfc'iii inyil, t I Mt Urbiai r 'Ii- , - *-.- u IMIki- .-.I Monthly publication begins with the September issue, so don't wait another minute. Subscribe today and you still get the charter subscription rate of only 9+97 for one year (though we can't guarantee that price for much longer). That's 12 issues of the only ham radio magazine that is geared especially...

Way Radio Service Monitor

COM-3, 1hc worJd'f mosl popular Inw-cosi service Ttrjrri-tor For shops big or sfrrafi the CONt-3 defers advanced capabilities for a fantatrc price and r> ur new lease pro-r. riirri eHows yau to own a COM '3 To r less than 3.00 a day. Featur& S Drecl entry keyboard wilh pf& gr iDmable memory - A url-o & fraasmitlcr frequency counter *L D nar graph fmquencytorror devlaiion display *0i 1-10,000 uV dlIpui leveis -High receive sensitivity, ess than 5 pV -100 kHz to 399.9995 MHz...

Israel

Managev 85530 Israel AMSAT-lsrael, in cooperation with the Technion University of Haifa and the Asher Institute for Space Re search, is building an amateur radio satellite. Most of those working on the bi rd are volunteers and students giving of their spare time in this on-going project to build smart satellites for the amateur radio community. Techsat I is to support digital store-and-forward communications with an onboard packet 8BS. The bird will fly in a...

Circle Oh Reader Service Caro

The tiimaip adv.incf J tec nqlogv The tiimaip adv.incf J tec nqlogv Box S02 Ft. laudtrdaU, FL 33302 4305) 523-0360 THE BOTTOM LiHfl. MAKCbr WCJJI* t CIRCLE 101 ONI READER SE VPCE CARD Bill Brown WBSELK 'if 73 Magazine Forest Road Hancock NH 03449 Students at Franklin Community High School (Franklin. Indiana) have a very exciting course offering Each year juniors and seniors have the opponunity lo take an Aerospace Technology Class wish J had one of these when J was in school1 One particularly...