Radio Amateur 12-1979

Mfj624 Phone Patch Circuit

Radio Telepatch

Took less than one hour to make the conversion and get the ten-meter rig on frequency A few modifications are available in the conversion kit that can be left out mainly, the frequency expansion switches that allow a full one-megacycle coverage. By selecting the correct set of crystals in the kit, the Pace can be put on the frequency you have selected without the addition of the switches and cabling. American Crystal also recommends a modification that allows the clarifier to move the...

Swan Astro Ssb Transceiver

Swan Astro 150

Swan is backt After a several year hiatus, during which little was heard from the company, Swan has returned to amateur radio with an impressive array of all-new, state-of-the-art equipment. Swan, for those who have short memories, was a dominant force in amateur gear in the late '60s and early 70s. I was one of thousands of young hams of that era who yearned to own a Swan rig, but my high school and college finances never gave me that opportunity. That's one reason I jumped at the chance to...

Electronics

305 Airport Road Oceanside, CA 92054 714-757-7525 have a conventional tuning knob and it doesn't. The main tuning control is called the VRS (variable rate scanning knob. The shaft of this knob is attached to a cam which actuates either of two micro* switches, depending on which way the knob is turned. When actuated, these microswitches send signals to the 8048 microprocessor. For example, when the VRS knob is rotated clockwise from its neutral 12 o'clock position, the left-hand microswitch is...

For Radio Amateurs

32 New Product Swan's Astro 150 SSB Transceiver _ wbbbth 38 Low-Cost Receiver for Satellite TV this modular design uses readily available technology * * N6TX 44 A Simple 2m 10m Crossband Repeater System work the world with an HT K9EID 50 Audio Booster lor Mil-Surplus Receivers a must for headphone haters McClellan part 11 experiments with gain and supply three-iC design goes to 135 MHz. ____McClellan 66 A Versatile, Variable Active Filter dc switching and 8-poJe response make this one a winner...

Hal Communications Corp

For our EuropeanCustoniers Contaci Hicttter 4 Co 0300C Hannover 1 i.EC tnterdco eSlSBissoiw Lugano Write or give us a call, Well be glad to send you our new RTTY catalog. Gary McClelkm 2500 N. Harbor Blvd. Fuilerton CA 92634 One of my biggest pet peeves with military surplus radio equipment is the low audio output of some sets. And that is the one big problem with the R-64S ARR-41 radio receiver that I converted recently. See Another Surplus Treasure ' 73 Magazine, November, 1978J This receiver...

My TRS Is Here

First steps in programming your computer AUan S, Joffe W3KBM 1005 Twining Road Dresher PA 19025 You unpacked the large box, examined the contents, and carefully plugged it all together. and it works. By now, you have read the excellent book that comes with the TRS-80 or, f you are lucky enough to have Level 11 BASIC, then you had two books to read . and digest. The nicest thing for any beginning programmer is no different from the nicest thing for the beginning ham a starting point to get from...

Satis Fa Ct Ion Guaranteed Or Money Refunded

Isopole 220 Antenna Pattern

WHY ARE ANTENNA MAKERS ANGRY AROUT THE NEW AEA ISOPOLE For the first time ham operators are finding out just how poorly designed most vertical, omnidirectional VHF antennas really are. AEA university level research has proven that most antennas now being offered create unwanted coupling of RF currents onto the antenna support structure and coaxial feed line shield from the transceiver. Proper design and decoupling on the hew AEA ISOPOLE virtually eliminates the RF spillover problem and can help...

12 Muffin Fans Used For Amateur Radio Transmitters

EG & C Rotron fans, with 1970 prices. Table 7. EG & C Rotron fans, with 1970 prices. have square or circular housings with an inside-out motor the shaft part of the motor ts the fan hub with the moving blades attached They're by far the most popular and useful fans available to the radio amateur Almost all ham rigs today have a well-designed natural air ventilation system called convection cooling, This simply means that the warm components in the rig heat up the air nearby,...

State Arrl Official Kicks Florida Midday Traffic Net Out Of League

On August 11th, ARRL South Florida Section Communications Manager (SCM) Woodrow Woody Huddleston informed Florida Midday Traffic Net (FMTN) Manager Al Suhr WB4AID that FMTN was no longer a part of the American Radio Relay League (ARRL). tn his letter, Huddleston gave no other reason for the revocation of the ARRL section of Florida's largest traffic net other than to say that the FMTN does not qualify as either a section net or a local net in the ARRL National Traffic System. The net and its...

Novice Corner

Let's talk about the perennial Novice, the one who never seems to learn. This is a rare case, actually, as most amateurs advance to being reasonably competent operators as they gain experience. Today's topic is how to work through a pileup on CW while causing minimal interference to others. This morning, VQ9MR was working the US on the long path at 14,036 kHz, using relatively high-speed CW. The stations he was working were all about one kHz higher in frequency. That is, VG9MR was listening up...

Worked All Sm Laens Wasm Ii

The WASM II, awarded by SSAh is available to amateurs throughout the world. Class A is for amateurs located in those countries with prefixes LA, OHr OZ lt and SM. The Class B award is for amateurs in the rest of the worid. To be valid, all contacts must be made January 1, 1953, or after. Any one of the amateur bands is allowed and contacts made in CW or phone or any combination of both are allowed, providing it is not cross-mode, Amateurs in Class A areas must submit proof of having established...

North Carolina Qso Party

Starts 1900 GMT December 1 Ends 0100 GMT December 3 This contest s sponsored by the Alamance Amateur Radio Club. Suggested frequencies are plus minus 10 kHz CW 3560, 7060, 14060. 21060, 28060. Out-of-state stations send RS(T) and state, province, or country. NC stations send RSfT) and NC county. SCORING Out-of-state stations count 1 pomt per NC contact. The same station may be worked on different bands, modes, or in different NC counties. Multiply QSO points by number of different NC counties...

Emitter Follower

Block diagram of the complete baseband processing portion of the DOM5 A T video receiver fie above circuitry is driven by the output of the downconversion module set fsee Fig 31 and provides standard 1-volt video and O-dBm audio outputs to an external modulator, studio monitorf or video tape deck, stitution becomes a viable troubleshooting technique. And, of course, a modular system maximizes user flexibility by allowing customers to assemble from standard modules a custom system...

New Prom Clegg

SETTING NEW STANDARDS IN 2 METER FM FOR THE 80's In the tradition of the famous FM-DX and the popular FM-28 Clegg proudly announces the 2 Meter FM Transceiver of the next decade. Thousands oi owners of our earlier FM-28 have discovered that the clean 25 watts output gets them through on SIMPLEX or full quieting into repeaters where their earlier 10 watt rigs could n't make it. And the super sensitive, selective receiver typically outperforms most of the others. Of course, the full 144-148 MHz...