C I Lw Is

BOX I0Q HUMBOLDT N 3SUS t Bt AT nils LOCATION JSCL Stephen Cibson enjoys both computers and Earth stations. Stephen Gibson PO Box 38386 Hollywood CA 9(HB8 eginning this month, I will cover the principles of satellite TV with an eye on details on how you can design and build or buy your own Earth station, In the months that follow, I will continue with the basics of each element of your TVRO (television receive only) terminal. I hope that this series. Satellite Centra...

Personal

* TERMJNALL IT - AH new AlWn-orte Ham interlace anil terminal unit This is wllat you ha e beer, veiling for. Everything you'd expect rn a first class terminal unn and at a highly competitive pru.tj 499 M80,CM80 Ham interfaces Complete Morse code and RTTY system, PLL or external TU 175 to 279 * MS00 - Adds advanced sp screen) RTT'- wto n used with M80 CM8Q* 99 M8000 T1000 - Puwerti.il disk baSed R1 TV systems in eluding mailbox 150 RlTTY RITER - Powerful cursor editing oi HTTY texi grrrj...

Introducing

Now. for the first time Every amateur operator can enjoy the un parallel led freedom of a private phone patch in an economical package. Tte dramatic new CES 500SA Atitopatch is all the equipment you need to patch an FM base station to your home or other telephone line, without expensive repeaters, cavities, or other equipment Connections with any standard FM base station are rapid and simple. Bypass the congestion and expense of shared repeaters break through to greater privacy and convenience...

Rtty Accessories

FSD-l - RTTY Demodulator - I 70 or 850 Haitz shift Super sharp filters. Fits all Macrotronics Ham Interfaces except TERMINALL. 149 XTL-1 - Crystal controlled RTTY AFSK board I 70 SoG CW sh ifts Fits ill Macrotronics Ham Interfaces except TERMINALL. 92 MLK Loop Interface - plug in replacement for the reed relay or. all Macrotronics Ham Interfaces except TER MIMALL 32 Morse Tutor - Teaches Morse code erv sophisticated computer assisted nstruction 29.95 Parallel Printer Interface drives a paralEel...

I

Contributions in the foim ol maim-scripli wtth drawings andtor photographs are welcome and will t considered for possible publication. We can assume no responsibility for loss of damage to any material. Please enclose a stamped, self-address& tf envelope with each submission Payment tor (he use of any unsolicited material will oe made upon acceptance. An contributions should be directed to the 73 editonal oifices How to Write for 73 guidelines are avariable upon request. Pine Street...

Compaas

- SIZE Unb tevable Qn vev by by9*i - MICROCOMPUTER CONTROL A l frequency contro* S earned Out Dy a * MUSICAL TONE ACCOMPANIES KEYBOARD ENTRIES -hen a e ts pressed a Dr et musical lore indicates posrtiv eilfry clothe microcomputer * PUSHBUTTON FREQUENCY CONTROL FROM MICROPHONE OR PANEL Frequency is selected by butions on ihe front panel or microphone * 8 CHANNEL MEMORY Each memorychannel is reprogrammable and stores the frequency and oliset Memory is backed up by a N1CAD battery when power is...

Simpler

In reference to the article titled 'Solar-Powered Align ment Tool in the August 73, there is a way to determine a north-south or east-west line from the sun without the use of tables, clocks, calculations, etc., as are needed in said article. The method requires onty a small area of relatively level ground and a Slick (two or three Dial calibrated in 1 khz increments. Optional Accessories' Vista XXR ( 20 A. A. C. Power supply - 99.00 Shure 404C Hand Mike - 36.00, Shure 4440 Desk Mike - 48.00.

Memory Keyer

A v ftc a CMOS memory Rec(tfii ai any speed pisyz c.> L -,ir .tft) 1 eeed i 'nessagf cap > -. v Em., < c Yend CO CO CO J' ere H w pidr card ccontai* de Uli to> JJ . CiC - - co 'f ri St'H completing doilj li'Ttf ssfies ticin dot flfttf dash npmoif .iin& Ji- Heymg .-.ifrt jny sQweeie patftftp j jpfd v tume fOrir rune ntf W jfJlf controls j curr& m lifji f C iOS Ddlierv operation porttptt Cr L ii quartet t 1 f-it * tor rtfv arte b'-oc* no tafid i'aie rOJ F Srarp at 3 t CVD-S arc...

Tribande

The Rugged, Reliable 10,15, and 20-Mei Yagi You've Been Waiting for Is Now Available. This exciting new tribander sets the pace for dependable performance with its two in one trap design - and the solid construction you expect from Hustler, In fact, its durable design is partially based on concepts used in the time-tested and world-renowned Hustler4-Band The 3-TBA is the smallest full-featured trlbander available today. It offers excellent front to back ratio and SWR at resoncnee Plus, it is...

Compare the

169.95 buys a terminal unit kit with the features you need most for enjoyabte RTTY. Our 3-stage active input filters, built-in AFSK and 60 m A loop supply make the TU-170 a great buy regardless of the rig or printer you prefer. Sound interesting Call or write for details about our full line of RTTY equipment backed by a complete factory support program. P.O. BOX 976 Topeka, KS 666OI 913*234 0198 Dltlrfbufor) I11 Canada and Auitrollo The Kantronics audio filters give you the precision and...

Aes Branch Storesassociate Store

WICKLIFFE, Ohio 44092 ORLANDO Florida 32803 IAS VEGAS. Nevada 89106 ERlCKSON COMMUNICATIONS 28940 Euclid Avenue 621 Commonwealth Ave. 1072 N. Rancho Drive CHICAGO, Illinois 60630 Phone 4216) 585-7388 Phone (305) 894-3238 Phone (702) 647-3114 5456 N. Milwaukee Avenue Ohio Wats 1-800-362-0290 Fla. Wats 1-800-432-9424 Pete. WA8PZA & Squeak, AD7K Phone (312) 631-5181 Outside Ohio 1-800-321-3594 Outside Fla 1-800-327-1917 Outside Nev 1-800-634-6227 Outside ILL 1-800-621-5802 HEMftY 1KD-B 8015m...

Mfj

Culver City CA Residents add 6 sales tax) Bring ORGANIZATION & CONVENIENCE lo your HAM Station Kliminate clutter and provide lots of space for everything vou need - Tuners, VFO, CW Keyers, Filters, Telephone, Log Book, Etc ALL PARTS FITTED STURDY CONSTRUCTION Floor space 39w by 30d. Also 61 w by 30d - 192.50 Call (213) 837-4870 or Write for Information 4384 Keystone Ave., Culver City, CA 90230 lohn Ackermann AC9VH 73 Magazmt Sraf The Complete Idiot's Guide to DX, by Stuart Gregg NF4Zt...

Autopatch

The First Affordable Private Phone Patch Anienna side-switching hut showing a portion of antenna routing system. Each square is a motor-driven switch. hannesburg, the largest city in South Africa, by Pieter Martins, the principal engineer of Radio RSA and host of the station s popular DX program. This had come about sinv pty because when I made my travel arrangements, I also wrote a letter to Pieter to try to arrange a visit to Radio RSA. So on this day, Pieter had picked me up in his car at my...

To Gunn

Fig 1 Block diagram of method of presentation of swept signal. edr also indicated levels of attenuation or gain. The filter being pro* cessed using the above technique is part of the front end of a radar detector which is centered on 10.525 GHz, the X-band police radar assignment. The filter forms a preselector for a varactor-tuned Gunn oscillator transceiver front end manufactured by Microwave Associates he detected output of the transceiver is fed into a 30-MHz ihf amplifier The combination...

Mfj Incorporated

Box 494, Mississippi State, MS 39762 See i. s ot Advertisers o page 3Q Radio RSA broadcasts an excellent program every morning at 1300 GMT and also at 0300 GMT It is called Good Morning Africa and while not directed to North America but to neighboring nations on the African continent is easily picked up here in the US It features short commentaries. live interviews, and music. Agarn, it is in English If you are interested in sports, Radio RSA devotes Saturday mornings from 1300 to 1500 GMT to...

R L Drake Company

540 Richard St,, Moisburg, Oh o 45342, USA Phone 513 866-2421 Teiex 208-017 Kart 1 T h urber, r U 8FX 317 Poplar Drive Mtllbrook Al 36054 Regardless of the sophistication, cost, or complexity of one's amateur radio equipment, there always seems to be room for adding a few custom accessories to round out the station's inventory One of the most common accessories is the receiving preamplifier. Most of the best-designed and costly transceivers and receivers sold today have enough sensitivity and...

CALL

2410 Ore ei Streer Woodbndge, VA 22192 InJormahort 703 643-1063 Orrtirrs 1 800 336-4 799 Se I_ 11 r H- c 41 11 14415 Jiift Djuis Mwy Wontlhridgp. VA Code Hps.lSOPOL AnfHin.i-. CALl HV-GAIN ANTENNAS T H6 O XX T ribftn 11 Br gt .im 238 95 I -t MK3 3-Ftomprn B i.im 1 95 TH3JR 3-Elnmriil Ttiliiinrl 1 38 iJTa t A AVQj'Wfl 10 40 ic jt bO 7 1 CUSHCRAFT ANTENNAS A.4 V'A Tninnn.i Gkam IO-t5-2i m 206 95 A I inh.mi B rtm 10-15-20rn tfciM 1 AV3 Nt 10- i5-20m Vorlfca 4T 50 ARX 2B New Hmgo RanyrH 2rn 14 00...

Mfj Econo Keyer

New MFJ4D1 Econo Keyer ll gues you a ratable, fuH feature economy keyer for squeeze, single lever or straight key. Has sidelone, speaker, volume, speed, Internal weight and tone controls. Sends Iambic, automatic semi-automatic, manual, Tyne luncHon Dot dash memories, B 50 WPM On LED Use 9V battery. 6 9 VDC or 110 VAC with optional AC adapter, MFJ 1305. S9.95. 4x2x3W, Reliable solid state keying. Keys virtually all solid state or tube type transmitters.

Still The Leader

Sale of the ST-7 T Is subject to FCC Certification. SANTEC'S popular HT-1200 is the incomparable 2 meter leader This little rig is handing over quality, power and features that you'd expect from something nearer the size of a bread box. SANTEC packs a 2 meter ham shack into the palm of your hand You can carry scan, search, 10 memories and fully synthesized key pad control around with you and still get out with a big 3.5 watts nominal . Compare them apples to anything you want, and settle for...

Fsk Terminal Unit

Unparallefeci selectivity achieved with sophisticated true limiterless design Ultra sharp active filters Tuneable shift 8CM000hz Seiectable band widths 100 55hz Positive dynamic range indicator Extruded aluminum enclosure Rugged commercial quality Adjustable mark hold Keyboard activated transmit

Silver Plating

GUN1N s JtJRCE C GHZ - gt -izF.1 wF 90 JV JfEGVI DE VOU N 7 NG i MP A T SOURCE 10 To tC 5G HZ - 0- 20M WFt 90 MOUNTING Fi. t P MIXER t i i.- GHZ WF HII VIOUN1 IN i K ORM AN F t NMA 10B-G AIN Ai r.i 52 amp GHZ WR-90MOUNTING WAVE GUIDE Flan F WH-gu WiH fltc Ctpw B Er ni N i. -y Ti PewTe G ans rnest wUitt metal iHoyi

Upcoming Articles

Bob Cooper Profite of a Pioneer1 ''Satellite Channel Guide, Part II Stephen Gibson on receivers Product reviews and const ruction articles Satellite TV Glossary KLM, a big name in ham radio antennas, has joined the satellite game with several complete systems. Their automated tracking system a ows you to turn your dish from bird to bird from the comfort of your living room. W hile the experts debate the relative merits ot spherical antennas like the one shown here, hobbyists are finding new and...

Amateur

4828 W, Fond du Lac Avenue Milwaukee, Wisconsin 53216 Phone 414 442-4200 a es firpnch Stor in Clear water, FL Orlando, Fl WicWifH Oh Las Vegas. NV and Weather Band on 2 meter rigs. Covers nearly all FCC allocated police fire VHF-hi freq. 154-158 MHz . Direct freq. readout on synthesized, VFO 144-148 MHz FM rigs. Now with weather band coverage police fire scanner- Direct freq readout on synthesized and VFO rigs. M0iT LED. 9 18 VDC SO 239 Mtg bkl 3x4x1 MF J-311, 49.95. Like MFJ 312 less WX and...

Mfj Keyers

Uses Curtis 8044 IC. iambic operation, dot-dash memories, weight control, solid state keying. RF proof. Ttie MFJ-408 Deluxe Electronic Keyer sends iambic automat, semi-automatic manual Use squeeze singie lever or straight key Speed meter lets you read speed to 100 WPM Socket lor external Curtis memory, random code generator, keyboard. Optional cable, 54 95. Iambic operation with squeeze key. Dm dash insertion Semi-automatic bug operation pro vides automatic dots and manual dashes Dot-dash...

At Your Dealers

617 SOUTH GALI ATIN ROAD - MADISON, TN 37115 Central and South American Dealer inquiries to TLX 80-832 Paul M Damer NW 2 Dawn Road Horwatk CT 06851 One set of questions usually asked by new hams concerns the practical aspects of setting up a new station These questions are often difficult to answer since they can affect the new ham's entire family, assuming the station is to be focated at home. Quest on I just got my call in the mail and now want to set up my station. What is the minimum 1 need...

Audio Input

The completed SSTV audio signal analyzer. ect to input level sensitivity problems which adversely affected the display readings. The spectrum coverage also was determined to be unsuitable for SSTV application However, from the results of the literature searched and with problems identified from the breadboard circuit experiments corrected, the configuration of a workable low-cost SSTV audio signal analyzer was developed. The unit described in this article is of simple design and may be...

Ica

10 KHz or 1 KHz per revolution bandspread. A large tuning knob with adustable tension and closely spaced RIT and passband tuning controls allow fine tuning ofa signal with a minimum of effort. Human engineering provides such features as illuminated annunciators for transmit, CW Narrow, RIT, tuning speed, and dial lock- Readout of mode in use and VFO along with frequency eliminates unnecessary eye movement. One large multifunction meter shows signal strength, relative power out, SWR, collector...

Mfj Products

989 Nt-a 3KW Tuner 962 .5KW Tuner mlr.'iwilcS 961 t.SKWIimt-f 94 IC iA ji M una iwicrhnm 940 300 win lurter smMi mir 464 Grarirlmj tffT m miiry fcw ' I . msg 482 J m-S-g Memory 422 Pjcei tr i K ytr w Bencher BV1 410 Professor Mur 408 DeluAf Knyer with pnert mir Knybtjruri l TO 24-hour clock 260 '262 Dry Dummi, Luiarts BENCHER PADDLES B Cb gt vm ASTRON POWER SUPPLIES I B VDC AS J A 5 ccmtHiuobs 7 rT-p rCS RSl A 9 Jtnps gt .nr gt i IN i I 2 jnrpB ICS RS70A ifi ifTips comtnumjs 20 nmpa RS20M SHim...

Ordehs Ark Postage Raid

Dave ngram K4TWI Eastwood Village 1201 South Rte, 11, Box 499 Birmingham Ai 35210 My original review of the Universal Communications 2 300-MHz downconverter kits, which appeared in the April, 1981, 73 Magazine, revealed the widespread interest in re cetvinj MDS and commercial TV satellite transmissions Indeed, my mailbox bulged with letters for several weeks after the article was published. A large number of inquiries received concerned my briefly-mentioned thoughts o later converting a...

Conventional Mode

1 Enable INHIBIT HOPPING, stop hopping 2 Trigger RESET SHIFTREGiSTER. load thumbwheel values 3 Lock out SYNC TONE DETECT, in case we are resetting 4 Disable SEND SYNC, TRANSMIT ON. In case we are resetting Note Conventional mode also is a recovery position which is used by the other two modes and by the operatorio recover from a foul up such as no sync tone being received for a very long time when one is expected. Table 1. f unctional frequency-hopper control board logic sequence. Paul picked...