73 Amateur Radio Today – December 1979

73 Amateur Radio Today – December 1979

Issue Contents:

New Product: Swan’s Astro 150 SSB Transceiver

…… WB8BTH 32

Low-cost Receiver for Satellite TV

– this modular design uses readily available technology …… N6TX 38

A Simple 2m/10m Crossband Repeater System

– work the world with an HT! …… K9EID 44

Audio Booster for Mil-surplus Receivers

– a must for headphone haters …… McClellan 50

Working with FETs

– part II : experiments with gain and supply voltage …… WA2SUT/nNN0ZVB 54

Build this $50 Mini-counter

– three-iC design goes to 135 MHz …… McClellan 58

A Versatile variable Active Filter

– dc switching and 8-pole response make this one a winner on RTTY or CW …… WA8HEB 66

Variable Tuning for WEFAX Receivers

– why be rockbound? …… N6TX 70

Ham Radio Marriage Manual

– a YL and her understanding spouse …… WB5YVE 76

The Space-saving Square Vee Antenna

– a directional radiator for cramped quarters …… W7DJB/6 80

License Upgrading -a Plan of Attack

– you need not fail! …… WB2RVA 84

Muffin Fan Mania!

– a compendium of knowledge about electromechanical air movers …… WA6NCX/1 88

Are Repeaters Ripping Us Off?

– some thoughts about open access to scarce frequencies …… KB2JN 92

My TR5-80 Is Here… Now What?

– first steps in programming your computer …… W3KBM 96

Teaching Your Micro to Count

– two methods for adding counter capability to your 6502 machine …… K6EW 104

Operation Santa!

– spread holiday cheer with this super club project …… WD8LPN 118

Tools and Techniques for Wire-wrapping

– an excerpt from 73’s new book …… W6SWZ 126

Working with Transistors

– useful knowledge begins where gobbledygook ends …… WA2SUT/nNN0ZVB 132

A Digital Clock with Analog Readout

– this is progress? …… W9IEA 138

Turn Off Repeater Windbags

– HT mod brings welcome relief …… WD5HYQ 144

Build a $5 Coax Switch

– why pay more? …… W8HXR 146

Hamdom’s Evangelical Crusade

– born-again ops arise! …… WB8TCC 148

The Memorizer Flies Inverted

– something Yaesu never told you …… W1WUO 150

Double-duty Decoder Project

– listen to SCA and tune in RTTY …… WA1UFE/5 152

Build a Simple HT Charger

– doubles as a 12-v supply …… W6SMJ 158

Do-it-Yourself Carrying Case for Wilson HTs

– save $14.88 …… K2GMZ 160

Come On In- The Viewing Is Fine

– an update on trends and developments in SSTV …… K4TWJ 168

Rack ‘Em Up

– glass jars and orange crates are “where it’s at” for parts storage …… VE2BVW 172

Gadzooks! A variable 0-260 V Ac Supply!

– junk-box delight …… WB8JCQ/lU1AKO 174

Scrounger’s Special: Used Dental Tools

– your DDS throwaways make dandy PCB drills …… WA7OYX 176

First Look at Latest Radio Laws

– the official work …… KB5AO 188

The Induction Relay: Self-powered Switching

– this unusual actuator doesn’t require a separate control voltage …… K6DZY 192

The Further Adventures of Keycoder

– simplified wiring for the toroidal cores …… AD9K 196

All About Ground Rods

– getting connected to Mother Earth …… Staff 200

73 Amateur Radio Today – December 1979

Return to 73 Amateur Radio Today Index


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