Communications Specialists

After a week of checkout operation from Orange, California, the 4-foot pack plus accessories was ready to move out to the island to the top of the Cataliha Airport control tower. Dave Corsiglia WA6TWF, Bob Swenson W6HIL, Rick Moore WB6FXF, Sam Niles W6CXW, and I loaded up two aircraft on the morning of 27 April and waited for the fog to clear at Catalina* At about 10 30, the island cleared just long enough for us to land, and then it closed in again. Paul White WA6NUA, Assistant Manager of the...

Repeater

On 27 April, 1973, the countryJs first licensed remotely controlled repeater came on the air with a 10-watt voice from Catalina Island, and more than 200 Southern California and Mexican amateurs tried out its 1 3,000 square mile coverage. Located on an island, the new WR6 AAA repeater had several obstacles to overcome before it was ready for service. First, the island of Catalina is privately owned by the Wrigley (chewing gum) family, which meant designing an installation under some conditional...

Bottom View

Robert Perlman WB2VRW 3 Joslen Places Hudson NY 12534 Robert Perlman WB2VRW 3 Joslen Places Hudson NY 12534 Refer to section 97.91 of the Amateur Rules and Regulations for the proper usage of one-way communication. There is a rumor going around in repeater circles to the effect that any ham worth his license should continually monitor the local repeater. It's a njce thought, but unless you re a control station and have to Irsten, continuous monitoring js inconvenient, if not downright...

Vox Poop

J would like to see more articles on RTTY construction and use.,, WN3UTG. (So would we, . .wayne). You should start a series for the beginners and show how to build a complete station from transmitter to transmatch. . JVJfke Reid, (Any budding authors out there to tackle this . . .wayne). Circuits column should be expanded would also like to see idea articles on UHF and SHF experimental gear and please consider more construction articles on SSTV and RTTY system, . ,WB4NLM. (Good idea. ....

Top Calculator Keyboard Only

Attractively designed Excel1 enI craftsmanship. Case and keyboard (dtsifr nt.-d as one unit). Cabinet is made of hi h-I-pact plastic beige color v th black bezel and amber window. Keyboard consists of a 3-position slide switch and keys, 5 of which are used for memory function. 20 keys gray 5 keys orange. All keys mounted on one printed circuit board This modular unit is well suited for our calculator chips* Ideal or tha CT5Q05, Case and Keyboard Complete cor set provides all of the electrun I...

Glade Valley School Radio Session

Courses Taught General Theory and Code Advanced Theory and Code Amateur Extra Theory and Code Golf privileges at New River Country Club also fishing TRUL YA VACA TJ0N_ W TH_A PURPOSE People attended from the following states and areas North Carolina, South Carolina* Missouri, Tennessee, Utah, Florida, Oklahoma, West Virginia, Alabama. New Hampshire, Iowa. District of Columbia, Vermont. Arizona, Indiana, Ohio, New Jersey, New York, Massachusetts, Maryland, Virginia, Illinois, Michigan, Georgia,...

Dfj

-FCC accepted for repeater application Based on El A Standard RS-329 long, 1-1 8 telescopic to 3 8 OD high strength aluminum Maximum radiation at horizon 50 ohm feed u Field adjustable 140-150 MHz SWR at resonance-1.2 1 measured at antenna Bandwidth-6 MHz for 2 1 or better SWR

Info

Fig 1, Canadian version of the Siow to l ast Scan converter. However, this gives you a fair underStanding of how Siow to Fast Scan conversion can be accomplished. The picture is converted into binary code, loaded into storage 1 at a slow rate, shifted into storage 2 where it is read out and recirculated at a fast rate, while the next frame loads storage 1. The D A converter converts the binary code to Fast Scan video- The unit differs from the U.S. version in that a picture can be viewed from...

Mfj Enterprises

COLUMBIA PA YS We need these today now SP-60Q JX HAMMERL UND RECVRS P.S. We're also hungry for Bendix, Collins, Tektronix, etc. ab equipment ' late model military eiec, for ground, sea, air other good gear. We pay freight Airmail cond. amp wanted today - NOW We're desperate

Equipment From

The following list of gear, unless otherwise noted, consists of brand new equipment purchased for testing purposes only. Some have been tested, some remain unopened in original cartons, We are offering this gear at a considerable discount on a first come-first-served basis. Please send Money Orders or Certified Checks only to 73 Magazine, Peterborough NH 03458. La tlott l rtrtui 3 a mimbn E lit S 75 H-J'h 113 IDT L amp uittc 'St e ilsji S MO Lrjnpj.ud fejln hy ID tu 2 U MHt 'SI20J 5 75 MdXind...

The Atv Raster

First of all, I would like to bring everyone up to date on the ATV repeater. As you probably read last month in 73 the license came on January 25, and the first QSO through the machine was on January 27, while testing it. We still have some finishing touches to do on the machine but all in alt it looks pretty good. During the tests I was able xo transmit a snow free picture up to the repeater and copy its downlink back with a broadcast quality picture. I was able to do this because its signal...

Rohn

ROHN manufacturers towers that are designed and engineered to do specific jobs and that is why we have the FOLD-OVER TOWER . , . designed for the amateur. When you need to get atlh your antenna just turn the handle and there it is. Like other ROHN big communication towers, they re hot dip galvanized after fabrication to provide a maintenance free, long lived and attractive installation. ROHN towers are known and used throughout the world for almost a quarter century . . . in most every type of...

O V

Alternate solid-state receive mixer section. the same technique you employ with your transceiver. Although the prototype has provision for metering the plate current, this is for preliminary adjustment and for assuring that maximum currents are not exceeded. tnal loading should be done with the aid of some sort of power, voltage, or current indicator in the antenna circuit, The too-popular swr meter serves well in this application. Although I have no brief

Each

Now two clocks in oneJ Tor 12V DC lloVflC Now adaptable to bo lt it pLinfs amp cars too One price for any LEO The only clock of its kind n USA today' 1 2 or 24-hr clock Include precisian t .- IAU thn hyutr C P- -n rd Srii niitir Dtvifts imrn iui gt tht- nt-w QJI LKII KTTJUOS dti it iJ rhtrk, TTint ri hLt y oil Chu rhtnnse tilt 'ALL-LKM Mnn l. arid Mnn i, ind the m-u hur w h fK - J irpir . only une price, s 17 ThiK i , ,1 Sri -Nii H evii'i4 fir L We even lhav tin- latKKN reiido ttt , t a...

Phase Lock Loop Rtty Boards

Hlis. noise squetch mark hold Complete RTTY TU only TWO G I ft plugin boards Constant current driver for f rimer - boards drive printer df fectly, Boards have FSK dnver and inverter siage which allow your printer lo key your rig vviifn no additional equipment.

Ts

The promise of the transistor has been fulfilled. Here is the transceiver you will want to own whatever you have now, get ready to trade up Its important features are far too numerous to list. Its specifications are superb. The TS-900 is unquestionably the best transceiver of its kind ever offered. The price 795.00 PS 900 AC Suppfy 120,00. the DS-900 140.00 TO E On Kenwood's go every place I O ULU . . . do everything transceiver The new TS-520 is the transceiver you...

Dip

DIP to s dp MlUfOiP to amp d gt dip MINI PI P OTP DIP Ol ME WW ME 541 NE S67 WE ftfib WE 5ft WE Pt L ticked L Qp Nil Lutkpd l.oou Phaic L titi cr I ucj I Pfui Loik f Loo Furtlran Ten M1WI D1POd O Hw W1ME DIP or. TO . 74c00 Quad 7 inpui fj afjd gjii 74c02 Quad 2 input nor gatp 74c107 du.ti j k flip-flop with clear 74c1s0 derjidr counter with ivnc. claar mm5312 distal dock chip - 28 pin - any readout j dtgiT tppi bcd with 4 man3m led Complete with data , .

Abc

Fig. 2f Schematic of how you can your camera as a common Slow Scan Generator. pulse output jacks to the unit for testing future circuits or sirnutta neously running two picture tubes off one monitor. By employing the previously mentioned ideas, one should be able to expand his present Slow Scam gear at a minimum of cost and effort. After alf, why build unnecessary circuitry, eh The W0LMD Slow Scan TV Keyboard is really catching on, and quite a few of the fellows have presently built working...

Digital Clock

MM 5311 and LED readout. Requires 1 2VAC,CT, Board 6. Kit 30. Tested 35. Accepts and stores 1 to 32 digits. Converts to Write for free flyer and specs on these and other board products. 2537 Weston Road Colorado Springs Colorado 80910 a The rules in this subpart are based on and are applicable solely to those provisions of section S031I 3 and 310 a of the Communications Act of 1934, as amended see Public Law 92-81t 85 Stat, and 78 Stat. 202 wherebv certain aliens...

Teb

With the HAL MKB-1 you can send perfect CW as easily as using a typewriter. The all solid-state MKB-1 is a complete Morse keyboard codetyper, with code speed variable from 10-60 WPM. Dot-to-space weight ratio is also variable. The MKB-1 is full of features, like a variable volume tone oscillator with internal speaker. Plus its own power supply. Computer-grade key switches. And it drives cathode or grid-block keyed transmitters. An available option is the HAL KB-ID automatic identifier. Touch a...

Looking West

A 34 94 repeater is on the air in L.A. - on 220 IMHz, that is. While much of the planned activity for 1 m came to a screeching halt when we heard that the upper part of the band was to become a citizens radio service, not everyone was scared off by the news, tt is a fact that there is probably more 220 FM activity in LA,, than in the rest of the country combined. We have five open repeaters on that band,, the latest of which is the proud work of Warren Andressen WA6JMM Warren originally started...

Inoise Cancelling Ncdm Turner Microphone

Turner's new NC350DM was designed specifially for use in mobile communications applications where traffic, equipment, motor or any other unwanted background noise presents a problem. The Turner NC350DM has a fre quency response of from 100 8000 Hz Impedance is 2000 ohms for use with atl transistorized equipment with input impedance from 600 10 5000 ohms. It has an output level of -60 dB. The case of the Turner NC350DM is manufactured of black cycolac and has steel mesh grille with a soft rubber...

Courier Mobile Mike

Fanon Courier has introduced a newly designed handheld microphone - the Courier Model CMM-1, human engineered for maximum convenience and for best mobife sound quality. The CMM-1 Mobife Mike, now standard on all new Courier rigs, is sculptured to fit snugly into the palm of the hand, but can alse be gripped and held paimdown No-pinch switching may be accomplished by the use of thumb or index and second fingers. Deep horizontal ribbing and extended edges act as acoustical barriers to background...

Oceanus Calls

Ship registry forms are now available for registering any craft with Oceanus. Your Oceanus amateur radio calf may then be used aboard that craft outside of the three mile limits of any land. Any ship may be registered under the Oceanus flag, from a row boat to an ocean liner to an airplane, and this registration does not supercede any previous registration, nor does it call for the display of the Oceanus flag. Oceanus call letters are being issued by the Chancellor of Communications of Oceanus,...

New Prefix For Papua

The P2 takes place of the VK in their calls. VK9XYZ would become P29XYZ with their new prefix of P2. Good news for WPX boys. VQ9HCS on Astove Island counts same as Seychelles is active and will be there untH about June 1975. He was not too active a few months ago, but had hopes that he could get more gasoline soon, hope he has plenty by now. Name is Harry and the rumor that he has an orchestra composed of fiddler crabs, squaking Boobie Birds, whooping cranes...

Po Boxa Carmichaeu California

2-3W PEP - A resistive L pad should also work well4, i his method is wasteful and somewhat brute force, but il does allow the immediate switching of the SSB exciter from the hf bands to 2m. All circuits are iirst adjusted to approximate resonance using a grid dip meter. If the doublet and driver stages are assembled on the printed circuit board, they can be peaked before this module is incorporated into the minibox. The mixer cathode current is monitored using an RCA phono plug, and should be...

Carnets

While many amateurs have had no problem carting their rigs from country to country, what with a minimum of customs inspection being the norm for most countries, the peace of mind of knowing that even if you should be inspected you would get through quickty and without cost is worth the effort in getting a carnet. A carnet will cut the red tape when you want to take along any radio or other professional equipment when visiting other countries. The carnet system is used by salesmen and engineers...