Laboratories

Suiccasunna, NJ 07876 Telephone 201-584.6521 2 METER FM with the Deluxe Solid State VARITRONICS INOUE IC-2F FET front end for low noise INTEGRATED CIRCUITS used in the AF and IF circuits for greater reliability. ELECTRONIC T R SWITCHING - no relays, CERAMIC FILTERS In IF Circuit* for excellent bandpass shopmg. ALL SILICON transistors Rugged, well-designed interior construction with shielded stages to assure stability and prevent spurious interaction. 20 WATTS flF INPUT Tor 10...

Action In Docket Case

FCCs regulation of rf devices extended to sale, shipping, and advertising effective October 1970 to implement 1968 law, reduce radio interference. Manufacturers, vendors, and shippers of radio frequency devices thai emit electromagnetic energy capable of causing harmful interference to radio communications must meet the technical standards of FCC rules after October 1, 1970. The new order implements a 1968 law empowering the Con mission to make reasonable regulations governing the interference...

Amateur Electronic Supply

Li Ute e i Place a fumchaA uomsi tt& ta frost Ute. jfoiuuAMsuf ie& l04vi SWAN 350C 80-10m Transceiver SWAN 500CX 80-10m - Deluxe . . SWAN 250C 6m Transceiver Mark II 80-i0m Linear - w tubes Mark 6B 6m Linear-w tubes . . , Power Supply for Mark II & 6B * . I I7XC AC Supply w spkr. in cabinet. 14-1 17 12v DC Supply w Cabte 5I0X MARS Oscillator - less crystals 508 Full Coverage VFO 210 6 Meter VFO VX-II Plug-in VOX lOOkc Calibrator Tor 350 lOOkc Calibrator kit for 350C only 500kc...

Prestel Field Strength Meter

Jfc A Go Id-Mine for Antenna Installers Frequency Range 40 to 230 and 470 o 960 Megahertz. Calibrated outword from 10 to 50,000 Microvolts- Nothing makes it easier to properiy and speedily find the correct place to install TV, FM and Communication Antennas. You can measure and hear the signals with this 4' 2 volt battery economically powered unit. There is nothing else like itl 548 Broadway, New York, New York 10012, Phone 212-925-6000 Hsted in our directory, ask him how long it has been since...

At Leading Ham Distributors

C. 27608 advised by my lawyers that ou goons don't ever proofr I insLst that you print ev should be boiled in oil ov stratcd leadership for amateur radio may be Js this the familiar if-i-did-it-so-can-you syndrome Ken Please would it be possible tor you 10 insert my name and address in 73 as I would like to get one or two pen pals in other parts of the world who are as intensely interested in all aspects of ham radio, TV, and electronics as I am- I am nearly 16 years...

Signal Generator

Sansei Audio Generator

Measuring only IV2 x 3 x 3 , and weighing slightly under 2 pounds, the Sansei 6803 Mini-Generator is a completely solidstate sine and squarewave instrument of unusually high quality. Especially suitable for field engineers, broadcast stations, and government agencies, this little beauty is winning favor among our ham fraternity as well. Of Wein bridge design, using an FE oscillator with both a thermistor and copious amounts of inverse feedback, the output is maintained at minimum distortion and...

Radio Handbook

Completely updated edition of the famous communications handbook which is the electronics industry standard for en gineers, tech nie i ans and advanced amateurs- Explains in authoritative detail how to design and build all types of radiocommunications equipment. Includes SSB design and equipment, RTTY circuits, latest semiconductor circuits and IC's, as well as special-purpose and computer circuitry, 896 pages hardbound- Order 24020, only. . 13.50 The Radio Amateur's F-M Repeater Handbook his...

Telephone Operators Headset

Shipping wt 2 COAXIAL RELAY -24 volt dc with Type N connectors. 0-10 PIXIE TUBE - fiyn-oughs B9012 1 inch diameter. Minimum order 5.00, Sorry, no catalog at this time. Write for specific items. Watch for our ads in 73. Stop in and see us when you're in St. Louis. 30, count 'em 30, stupendous tremendous more handbooks than magazines fascinating enormous devastating incredibly enervating back issues of 73 Yes yes yes here is a golden opportunity to btow your mind on 30 back issues of 73. You send...

Twx

Ff you haven't already received a copy Of our NEW 1970 Catalog of Precision Quart Crystals amp Electronics for the Communications Industry, Somewhere along the line, in virtually every ham repeater in the world, you'll find a couple of Sentry crystals. Repeater owners and FM oid-timers don't take chances with frequency -they can't afford to. A lot of repeater users depend on a receiver io be on frequency, rock stable in the dead of winter or the middle of July. The repeater crowd took a tip...

Good Through Meters

Superregenerative Receiver

Since the receiver seemed fairly sensitive, checks were run on it to compare. The sensitivity ranged from 3.0 iV for 20 dB of quieting at the low end to 5.5 iV at the high end. The usable, or threshold, sensitivity is actually much better than the quieting sensitivity, and is a more meaningful standard when no squelch is employed. Both receivers performed excellently with outside antennas. Because of their small size and low cost 17.95 the receivers give the amateur portable...

Sstv Camera

Alignment method used in televising process., It is possible, with some SSTV imaging systems, to do direct color separation with the SSTV camera. Slow-scan systems employing 931A photomultiplier tubes Mutton. 1 68 or conventional vidicons such as the 6326 Taggart, 1968 Mutton, I96c gt have spectral response functions suitable for use in direct color separation Cohen and Parr 73, Jan. 1970 . Slow-scan vidicon tubes, however, peak in the blue-violet, and cameras employing these tubes...

Huu

518 Brentwood Lane Richardson TX 75080 518 Brentwood Lane Richardson TX 75080 nJuly 1969, Allied Radio introduced lwo hand-held transistorized FM receivers. Although these units were designed for monitoring of low- and high-band commercial FM stations, the coverage of the receivers include the 105 6, and 2 meter amateur bands. The A-2586 receiver covers 27-50 MHz factual coverage without retuning is 26.5 to 52.5 MHz and the A-2587 receiver covers 146-175 MHz, factual coverage is 1 45,5 to 178...

Radio

Shortwave Antenna Homebrewed

Sox 88 Amsterdam, NY 12010 518 842-8350 Service and Friendliness to the Radio Amateur Please refer any questions of a technical nature lo one of the following members of 73 Technical Aid Group, These are dedicated amateurs who really want to be of help and do so without compensation. Be sure to state your problem clearly and enclose a S.A.3.E. for a reply. John Allen K1FWF, high school student, 51 Pine Plain Road, Wellesiey, MA 02181. HF and vhf antennas, vhf...

Zk L

Honda 1 300 and F 800 generators which African Radio Society's TA33jr from a pile we used. Also from Bill came the mast of junk into a serviceable antenna once stays, and stacks for the TA33jrS As my again. Equipment used and from whom transceiver was in poor shape due to weak supplied was as follows W5KUC - 14 tubes, I started scrounging for new ones, AVQ RSEA - TA3jr G3R1R -HWIOO K3RLY supplied thejiubes and W5KUC 5H3KJ - SB 00, SB200 generators, masts, provided the vertical, with WA5REU pay-...

Vox

John ZK1AJ on Raiatonga mentioned that ZK1AA has a 50 MHz beacon aimed at the states. That would be a nice one to hear. John's QSL manager is KH6GLU. SU1 MA's QTH is Hox 840, Cairo. JX4GN has been quite active of late, QSI, to him via Norwegian Embassy, Reykjavik, Iceland. Odd also gets down on 3798 kHz. SV0WDD only active station on Crete, QSL to WQ3HUP if you contact Ray. Interesting development on Genada, a nonlicensed American has a ticket down there. I gather if you pay the fee you gel...

Free Brochure

Note that in the above examples, oniy one depress-release cycle of the dot and dash keys is required. Alf letters, numbers and punctuation marks may be generated using variations of this technique. From Distributor or Direct from Factory 3201 HANDLEY EDERVILLE RD. FORT WORTH, TEXAS 76118 73 Magazine carried a little tip in the July 1969 issue for prolonging the life of the standard soldering gun tip no pun intended . The method described involved healing a regular copper lip with a propane...

Info

Home, New Solid-State Camera and Monitor for Slow-Scan Television ' Ham Radio, April, 1969. Popkin-Clurman, J.R., A Simple inexpensive FM to AM Converter for Slow-Scan TV and Facsimile, 73, June, 1969. Hutton, L.L, A Slow-Scan Television Signal Generator, 73, July, 1969, Miller, D-C, Slow-Scan lelevision CQ, July and August, 1969, Taggart, R.E., A Procedure for the Reception of Slow-Scan Color Pictures Using Additive Synthesis, 73, November, 1969. Backman, A., SSTV ' 73,...

Magazine

18 Improved Color Slow-Scan Television..........W4UMF 24 Worldwide ITU Prefix Call Area List ..........W1SWX Editor-Publisher 26 The Super Autopatch...................... K6MVH Wayne Green W2NSD 1 Telephoning from your FM mobile, 36 How to Build a Keyer.......................W9KXJ Managing Editor And stilt retain your appliance-operator status. Ken Sessions K6MVH 1 A 2_Channel Search-Lock for FM Receivers.....W3DTN M Listening to two repeaters at once, fSL ana9er 44 A Look at Allied s Portable...