Radio Amateur 01-1979

Two Tone Paging Encoder

Programmable Divider With 74192

TS-1 Sub-Audible Encoder-Decoder Microminiature in size. 1.25 x 2.0'x .65 Encodes and decodes simultaneously 59.95 complete with K-1 element TS-1 JR Sub-Audible Encoder-Decoder Microminiature version of the TS-1 measuring just 1.0* x 1 25 x .65 for handheld units 79.95 complete with K-1 element ME-3 Sub-Audible Encoder Microminiature in size, measures 45 x 1.1 x 6 Instant start-up 29.95 complete with K-1 element TE-8 Eight-Tone Sub-Audible Encoder Measures 2.6 x 2.0* x .7 Frequency selection...

80 Hz Cw Filter

This new MFJ-721 Super Selector CW SSB Filter gives you 80 Hz BW, steep SSB skirts, noise limiting, 2 watts for speaker plus more. This Hew MFJ 721 Super Selector CW SSB Filler gives ytni a CGmbmaiion of performance and leaiures available only from MFJ * Razor sharp BO Hf non-ringing CW filter * Steep Skirt SSB filler * Selectable pea* and rough notse limiting * Plugs in phone jack Two watts for speaker Simulated stereo reception inputs for 2 figs Speaker and phone lacks Auxiliary 2 watt...

West Walnut Compton Ca

Aico NJ 08004 HUNTING LIONS ON THE AIR CONTEST Starts 1200 GWL January 13 Ends 1200 GMT, January 14 The contest s sponsored by Lions Internationa and coordinated by the Lions Club of Rio de Janeiro (Arpoador), Brazil. Participation is open to alt licensed radio operators except members of the contest committee. The contest will be separated into two sections, phone and CWr with points counting separateiy and participation allowed in both modes. All bands 80...

Meter Announced By Dynascan

Dynascan Model 177 Vtvm

Dynascan Corporation has just announced the introduction of the B amp K Precision model 620 portable digital capacitance meier The 320 is a compact instrument capable of measurement over the wide capacitance range of 0.1 pF to 1 farad. Accuracy is said to greatly exceed the tolerance of most capacitors. The unit features a bright 4-drgit LED display for easy reading in laboratories, product iines, or field applications. The capacitance of virtually any capacitor can be measured quickly and...

Free Mfj Manual 8043

Has speed Control 8 10 50 WPMH LED to Show which memory i in use and when it ends, has record and playback control, and has up to twelve 25 character messages plus a 100. 75t 50 or 25 character messages. MFJ 721 Super selector CW SSB filter Th s new filter g,ves ou 80 Hz BW steep SSB skLrts noise timing 2 watts for the speaker select your bandwidth and has an 8 poie active IC filter. Adjust your antenna quickly tor maximum performance. Measure resonant frequency, radiation...

Icom Canada

Your latest issue is the best yet. and one of the fattest l1ve ever seen. You're approaching Japanese CO ham radio girth. The only drawback was your taking on the Chrysler Corp. I don't think ham radio needs any more powerful opponents and I for one wish you'd keep your printed opinions in the ham radio arena, There are certainly enough electronic foibles to aim your barbs at, aren't there (f you're running short, let me suggest DX list operations, blatant business phone patches, the FCC...

P O BOX

MISSISSIPPI STATE, MS 39762 CALL TOLL FREE 800-647-1800 Fot technical information, order repair status, in llix., outside continental USA, uf 601 -323 5669. 8D44 Keyer On A-Chfp Replaces aiuaj, 514,95 Apr 7S HH, Feb 76 QST flstfio Ndbk 75. Apt Nfttbh 77 7S 8044 3 iC,PCfl.SocketPMsnuaL 24.95 8044-4 Semi Kit 54.95 B045 Morse Keyboard On A Chip IC . , . 59 95 8Q45-1 IC lt PCB gt FIFD lt Sockets, Manuat,. 89,95 8045-2 Semi-Kil 159.95 3 46 Instructokeyer On-A Chip IC ,, 49.95 8046-1 Semi-Kil, 79.95...

Computerized Weather Station

Heath Company, the world's largest manufacturer of electronic kits, announces the availability of its new ID-4001 computerized weather station. The microprocessor-based ID-4001 indicates time, indoor and outdoor temperatures, wind speed and direction, and barometric pressure on an upright display panel utilizing farge LED readouts, tt will also display average wind speed and automatically calculate wind chiil factor as well. The lD-4001's memory aliows Instant recall of date and time of maximum...

Catalog Of Hardtofind Precision Tools

Digital Capacitance Meter

Jensen's new 144-page catalog is jam-packed with more than 3000quality items. Your single source for hard-to-find precision tools used by electronic technicians scientists, engineers, instrument mechanics, schools, laboratories and government agencies. This wanted catalog also contains Jensen's world-famous line of more than 40 tool kits. Plus 10 pages of useful 'Tool Tips to aid in tool selection. Send for your free copy today J7 TU-17D Kii 143.96 wired. . 2 9.96 fS Reader Service see page 22...

Telex Cm-1210 Headset And Microphone

Telex Wireless Headset Microphone

A-C-D-E-Etements lt 25-1000 MHz 38.00 ea The Ham ill rotor sets new levels of rolor performance Snap action switched wedqe brake amp rotational controls brings pinpoint accuracy to any directional beam New motor and brake designs offering pre brake action stronger iock-in place action, make the Ham III ideal for in-tower mounting. The A-280 is as close to the ideal antenna as you can get. Features 47 tapered 17-7 starless steel whip Magnetic mount has roof-top...

Lm380n Squelch Control

Heathkit 2036a 1970

Voifage-confro ed osc afor. have fairly decent integrity, They must, in one way or another, meet their advertising claims or ihe post office would rab at them like an alligator on a short squelch-tailed repeater going after a windbag. From the advertising, it s obvious that some of the schools offer Heathkits as the hardware inducements. Others claim to offer kits of their own design If it s the former, the Heath catalog spells out the specifications for the would-be student. If it isn...

Sst A Meter Amplifier

SST Electronics has added a 2 meter amplifier kit to their line of amateur radio equipment. The SST A-1 amplifier kit pro* vides 15 Watts of output with 1 Watt in. The SST A-1 includes every-tning necessary for a complete amplifier A drilled G-10 epoxy solder-plated printed circuit board (2 x 3 ) makes assembly easy (approx, Vi hr.) with the comprehensive instructions. A large heat sink keeps the TRW power transistor cool. For ease of assembly, the coils used in the SST A-1 are pre-wound. The...

Kenwood M Fm

KENWOOD Transceiver KENWOOD Transceiver TS-820S 160 thru 10M TS-520S 160 thru 10M 182 Reader Service ee page 227 50 Channel s 5 ban Li- Pr mm 50 frequencies from infinite ir quttncy c omen nations. Designate certain brinks for ipe ric types of acti-zi , lor example. u amp a bank I-E Har Police, i 1-20 for Secret Service. 21-30 for Drug fcnforcpment Agencies. etc 5-Band Coverage Include L.nw nd F-Figh VI IF bands, UHFand 2 meter plus amp meter amateur bands With special programming rechniques....

Efficient Remarkable

TirrieTrac sold and djstfibotcd by HAL TRON1X. Dealers wclcome. Send 1siomp or S.A.S.E. for information and flyer on other HAL-TftONIX products To Qfd r by phon 1-313-265-1752. ORDERS Ovtft i 1 VOO WILL BE SHIPPED POSTPAID EXCEPT ON ITEMS WHERE ADDITIONAL CNAftGES AftE QUESTED ON ORDERS LESS THAN 15.00 PLEASE INCLUDE ADOITION AL t VOO FOR HAHDUHG AND MAILING CHARGES. Rear view of receive board, Filter coil is in the upper left-hand corner, recognizes that it was triggered from noise and will...

7400 1hz Oscilator

Mc4024 Vcm

Ot the cabinet The cabinet is Radio Shack part number 270-281 and is 5 7 8 by 9 by 4-7 8 The four BCD thumbwheel switches were purchased from a local surplus house, but may be ordered from Circuit Specialists Co,, P.O. Box 3047, Scottsdale AZ 85257, You will need two of the end plates, part number 435245-2, and four of the BCD swiU hes, part number 435308-2, If you buy your BCD switches at a surplus store, be sure they are cod The relay, RY-1, also took some doing to locate From the photographs...

Mirage B Vhf Power Amplifier With Built In Rx Preamp

Mirage Communications is proud to introduce its new 2 meter solid state amplifier The B1Q8 represents a new generation of all-mode amplifiers for VHF use. It incorporates operation features that have not been available before in a single amplifier. The B1Q8 is designed to operate on AM. FM. SSB. or CW, with a power output of at least 80 Watts for 10 Watts input. A built-in receive preamp is standard The preamp utilizes a J310 FET in the latest low-noise circuit design. It provides at least 10...

Juies Wenglare

1979 Ham Radios

Of the 53 stops fules Wenglare W6YO and the Yankee Trader made, three locations issued him a cense to operate amateur radio. The first was on Pitcairn Island VR6). The second was Mayotte Island FH0YO , followed by St Helena Island (ZD7YOI With these special calls, he made over 900 contacts, fhanfcs to the countries and the officials who appreciate amateur radio and made it possible. Polynesia, a four-mast windjammer of Windjammer Cruises. This is one of the ships that takes one-week cruise...

Ultra Compact Watt Versa Tuners For All Your Needs

gt gt MS2 Order any product from MFJ and try it. H not delighted, return within 3D days for a prompt refund less shipping . Order today. Money back if not delighted. One year unconditional guarantee. Add 2.00 shipping handling. For technical Information, order repair status, in Mississippi, outside continental USA, call 601 -323-5869. Order By Mail or Call TOLL FREE 800-647-1800 and Charge It On MFJ ENTERPRISES, INC. MISSISSIPPI STATE, MISSISSIPPI 39762 MFJ-901 VERSA TUNEfi HATCHES ANYTHING,...

Sst T-4 Ultra Tuner

Sst Ultra Tuner

Using RL to set frequency and method a or b. set the low frequency limit. Pot PL preset to 1290 Ohms to start. a, A counter hooked to U32c-8 and set for frequency should read 7 3529412 Hz but few digital counters can handle the low f requencies accurately, so use period and set RL for a period ol .13600000 seconds, b, In the read mode, the readout should display 360 degrees 1360 counts . Check the two extreme settings that produce a 360 degree readout and set ft midway between these points....

Heavyduty Replacement Transformers

BTH_K-200Qn re COLI INS 30S-1 Po wir . COLL INSKWS-1 Plate COLLI N 5 5 I 6F-2 Tower . DENTRON 1 60-1 OL Power DRAKt L4B Plate COWStT G5E3-100 Power ,. GONSET GSB-20J Power , H-CRAFTERS HI-32 Power M CR AFTER 5 HT-37 Powirr HEATH DX LOG LV Power HEATH OX-1 00 Modi . HEATH MX-10 Tower. HENRY 2K Piatt HEWnrZK-Z Power . HENRY 2K-4 Power i 95 95 Si IS Si 50 S I 55 S I 65 I 65

The Chronicles Of .76 K6mvh

A noted local amateur recently said to me LAt least the .76ers had class 51 He was referring to the mid-1960s, when a group known as the i4.76ers ruled southern California FM with a 'Ntonguenn cheek iron thumb.11 That was the pre-repeater eraF when only a handful of hams inhabited two meters and even fewer ma- jr . i i, _ chines existed. Over a period of years, the .76ers had developed jamming into an art form. But being jammed was part of being a 76er1 and all on the inside looked at it as...

The New Yaesu Ftra

If your two meter FM operation is largely mobile, you probably prefer a crystal rig which you can tune from channel to channel without taking your eyes off the road. Of course, you have to have a pretty good memory, better than mine, to remember what repeater is on what channel. About a year ago, Yaesu in troduced the FT-227 l,Mem-orizer which allowed you to seJect a channel and automatically return to it when desired. Those folks at Yaesu know how to gild a lily, for they now have announced...

Trac Message Memory Keyer

Trac Electronics, inc., has in troduced a new completely CMOS state-of-the-art Message Memory Keyer. Containing ali CMOS integrated circuitry, the Message Memory Keyer contains two-message capacity. Each message has expanded 512-bit memory capacity 50 characters, approximately . The keyer can record at any speed and the messages may be replayed at the same or any other speed, A unique repeat function allows the operator to repeat the message played, as in calling CO. The heart of the Message...

Calgary Hosts Second Annual National Symposium

The second National Amateur Radio Symposium, convened by the Canadian Amateur Radio Federation, Inc,, wound up its two-day session In Calgary on October 1, The conference, hosted by the Calgary Amateur Radio Association under the auspices of the Amateur Radio League of Alberta, made severa) important recommendations to the senior officials of the DOC who attended. concerning the future of amateur radio in Canada. The more than 80 participants included amateurs representing major organizations...

Rf Power Labs Introduces Model V Amplifier

Power Labs V350

To announce the release of their newest amplifier, Model V350, ft is a Jj-kilowatt dc-input alfmode VHF amplifier designed for base station and repeater use. The V350 amplifier Is designed for the radio amateur, but can be used on special orders over 5 MHz bandwidth, from 135 to 170 MHz. It is capable of producing more than 350 Watts of rf output power into 50 Ohms when driven with 10 to 15 Watts. The amplifier weighs onfy 52 pounds, including the built-in ac power supply. For continuous duty...

Sam Harris Wfzj

On page 8 of the September issue of 73, we printed a picture of Sam Harris and his wife Helen. Word arrived from his son, Pat, that Sam died in early November. VHFers will miss him. For some reason, Sam and I clicked early on I think it was around 1948 or so that we began to get into extended contacts on the low end of 75m. We both shared an interest In 75m DXing in VHF and in learning more about the anomalies of life. When I moved out to Cleveland and became W8NSD in 1951, I visited Sam and...

New Meter Fm Mobile Transceiver With Memory Features Optional Microprocessor Control Unit

The TR-7600 2 meter FM mobfle transceiver with memory, and an optional RM-76 microprocessor control unit, which provides six memories and various scanning functions, have been introduced by TrioKenwood Communications, Inc. 4-MHz coverage 800 channels on 2 meters and Includes a memory channel. It operates on simplex same transmit and receive frequencies or repeater pius or minus 600-kHz transmitter offset modes. Furthermore, the memory can be used to provide a transmit frequency for accessing a...

Wv Wilson Vertical Trap Antenna

No bandswitch'ng is necessary with the new WV-1 antenna, it is an excellent low cost 10-40 meter vertical that offers an electrical quarter wavelength and a low angle of radiation. Advanced design assures a low swr on each band. For more information, see your favorite dealer, or contact Wilson Electronics Corpora tion. Consumer Products Division. PO Box 19000, Las Vegas NV 89119V Reader Service number W2. New concealed UHF antenna from Antenna Specialists- Alt Davis Frequency Counters deliver...

More Groaning

To K4KI's informative article ( Silence Groaning Refrigerators ) in the November, 1978. issue of 73 should be added several additional points to avoid problems ne described in addition to cleaning up bad connections in junction boxes, outiets and switches that show signs of overheating should be replaced. Appliances such as washers refrigerators, garbage disposais, and air conditioners should be fed by separate circuits directly from the fuse or breaker paneJ. A common neutral as he describes...

Vienna Va Community Center Wireless Society

The Vienna Wireless Society will hold its annual Winterfest on Sunday, February 25, 1979, at the Vienna Community Center, Vienna, Virginia. There will be tables, sales, prizes, food, and frostbite tailgating. Doors open at 6 30 am for vendors and 8 00 am for the general public. Admission is 3.00, including one prize ticket 2,00 for an extra prize ticket and 1.00 for frostbite tailgaiting. Preteens with parents are free. Tables range from 2.00 to 5.00t depending on the quantity. Reservations...

Even Better

NEW' The 13-51 OA P.L.L. synthesizer delivers 1,200 frequencies between 143,00 and 149.00 MHz the full 2-meter band, plus MARS. NEW The 13-51 OA will operate with up to a 6 MHz split between TX and RX NEW The 13-510A microphone connector is pre-wired for your Touch-Tone NEW The 13-51 OA has a 7-pin accessory connector for your Touch-Tone dial, tone-burst generator or discriminator meter, 'TnucrvTone is a registered ractemarfc d AT& T NEW The 13-51 OA is compatible with available popular...

News Editor

73 Magazine Js published monthly by 73, Inc., Peterborough NH 03458. Subscription rates rn the U.S. and Canada are S1B for one year, and < 35 for Three years. Outside the U.S. and Canada, write < or rates. Second class postage paid as Peterborough NH G3458 and at addi-lional mailing offices publication No. 700420 Phone 603-924-3671 Microfilm edition- University Microfilm, Ann Arbor Ml 48106 En-lire contents copyright 1978 by 73 JnC INCLUDE dLD ADDRESS AND 2IP CODE WITH AODftESS CHANGE...

The Aed Electronics Ftr Scanner

T recently acquired an FT-227R 2 meter rig. White this is an excellent rig on its own merits, one of the major factors influencing me was the availability of a good, Inexpensive scanner for it. Within days of getting the rig, I got a scanner in kit form, and installed it in the rig. it worked very well exactly as advertised. For my S34.95 plus 1.50 for postage , J got a mailing pouch well-packed with goodies. There are some 35 components in all., including 2 ICs and a glass epoxy circuit board....

French Contest Cw

January 27 Ends 2400 GMTt January 2 Phone Starts 0000 GMT, February 24 Ends 2400 GMT, February 25 All contacts must be made on 160 meter CW (or 1,826 MHz for F stations). All entries must be single operator, Score 3 points for each F or overseas French department or territory contacted in your own continent (10 points if in another continent). Multipliers are each F department (95) and DA1 2 STN FFA(F forces in DL), ICOM introduces its new 2 meter mobile radio with the detachable microprocessor...

Auto Zero Blanking

z frequency counter features I . , 0 to 40 C proportional oven time base, 25db preampurif with a 60db adjustable attenuator. Built in battery charger , TVJ' , , , t . With a rapid or trickle charge selector J Combined in a rugged (.125 thick aluminum cabinet makes the C700 if idea for the communication industry and professional serv- idea for the communication industry and professional serv- 3600A OWNERS Up date your 3600A frequency counter Proportional Oven Accuracy Over Temp rai 3600A OWNERS...

Massachusetts

Medford North Adams Waltham Worcester MICHIGAN Ann Arbot Clawsoii Fhnt Grand Rapids Lansing Mtdtand Mt. Clemens Muskegon Electronic Surplus Sales Communications Specialties Ltd Amateur Hadto Equipment Company Pelican Elec. tronics Mvnard Eiectronipi i ne. Pelican Electronics Pelican Electronics Wm. B. A gt ten Supply Co. Computen Unlimited Computer Workshop of Ral ti more Everything Ele-.trOnic Church vitfe Fleet romes J W Eteciromcs Computer Workshop Heath kit Electron t Cante Computers Etc....

Kantronics

Vri jcccpl Vhm Minct Ctera,-. zm-. * rttnvn. COMPLETELY FREE-STANDING, TELESCOPING TOWERS. fUT IT RECHT WHtHE YQU WANT it Wiitf one nand. IF ' to trDm ir to M high a 55 Fr > J EJicMv ihi i m roceiving tevel from ce Ham or TV Wnen 'j irtjnMD idiuat yciu mteima inttvii a ooe Or pyJ1 mirtlaftkA zran* -main -L-in ur - t -a i* i n V rep antenna*. 1 re ircntioci of our mo eL*. this K TKH1 carive . *-- row) OU an tui BAEAKOVEF& TH . -E SCON DEMENCE Oui OfAahovars not on it tHOBpe. lll lf if own...

Outputs To Sequence Detector

Dua -tone mu t frequency defector. Nofe 7 buffer can drive two TTL loads maximum. The remaining 4 bits of the address are a function of the access code as shown PROM 1, which initially has all of its output bits un-programmed at zero, is programmed at the five access code addresses shown to have output bit 0t to be 1 The control digits represent the last digit sent in a sequence, and, therefore, the binary counter portion of the PROM address would be 0101 as shown, representing the...

Radical New Totally Concealed Uhf Antenna Introduced By Antenna Specialists

A new UHF communications antenna designed for total concealment yet offering performance comparable to external mobile antennas has been announced by The Antenna Specialists Co., major producer of land mobile antennas and accessories. The new modei ASP-1000 covert antenna rs similar in design concept to antennas utilized for jet aircraft (A S Is also a major supplier of aviontc antennas). Producing a vertically-polarized radiation pattern, this cavity*backed slot antenna is constructed of...

Uhf Receiving Converters

M Q D E -C432-2 C432-4 C432- 5 432-7 C 432-9 Special RA.NGJ i-f RANGE 432-434 432-436 435-437 427 .25 439,25 28-30M H 144-146 28-30 6 1.25 61 ,25 Quality VHF UHF Kits At Affordable Prices LET YOU RECEIVE OSCAR AND OTHER EXCITING SIGNALS ON YOUR PRE S- NT HF RiClIVER I A 9 Extruded Alum Cose with BNC's Fo above Converters Optional S12 95 MORE SENSITIVE MORE SELECTIVE 70 or 100 dfi EASY TO ALIGN WITH BUILT-IN TEST CKT5 LOWER OVERALL COST THAN EVER BEFORE R70 6-chonneJ VMF Receiver Kit Tor 2M, 6M,...