73 Amateur Radio Today – January 1977
Issue Contents:
SSTV Test Generator
– invaluable diagnostic tool …… WA6VVL 22
How Does Your Rig Perform?
– an example using the HW-1 …… W6AGX 28
Art and the PC Board
– new uses for copperclad boards …… W7RXV 32
The “New” 88 Channel IC-22v
– add two switches and flip …… WA6OAZ 36
A No Hands Telephone Dialer
– mobile accessory using a ROM …… WA1PNG 40
What’s the Best Antenna for 160?
– the inverted vee compromise …… W5USM 44
Ten Meters: Dead or Alive?
– a user’s report …… K2HTO 48
200 lb. Cookie
– microwave repeater control …… WA6ITF 57
Weather Satellite Simulator
– do-it-yourself satellite? …… W9CGI 58
An Automatic Thermostat
– saves 10% on your fuel bill …… W1HCI 62
Mod for the Heath IO-102 Scope
– faster warm-up …… WB4MYL 65
The UFO Connection
– that was somebody fooling around wasn’t it? …… K8NQN 68
Go Forth and Multiply!
– the space age approach …… W1HCI 76
How to Find a Forgetful Memory
– diagnostics for a thoughtless computer …… VE3DWC 80
A Super Log
– a program for the ham shack computer …… WA7SCB 83
Short On Memory?
– build this 2K board for your 6800 …… WB2ZCF 90
A Software Replacement for the Muffin Fan
– IC cooling program …… WA1FEF 96
1 000 WPM Morse Code Typer
– for the bionic brass pounder …… WB2DFA 100
It Works! The First Time!
– the Seals Electronics memory board …… WB4WRH 104
The New Improved TT Decoder Updated
– better …… W7JSW 107
The Polarity Changers
– plus to minus …… Staff 108
Repeaters in New Zealand
– quite a few …… ZL2AMJ 110
A VFO for Sidebanders
– 5-5.5 MHz …… VK3XU 116
Practical Solar Cell Power
– great for remote repeaters …… W2EUP 118
A Simple RC Substitution Box
– using a matrix …… Staff 120
The Compactron Audio Driver
– three tubes in one …… WA5SWD 122
The Junk Box as an Art Form
– new use for blown capacitors …… W8GI 126
The Mod Squad Goes 220
– pub serv receiver for pocket 220 …… WA6JMM 128
Double Sideband: Something New?
– one for voice one for SSTV …… K7YZZ 130
Carbonize Your Crystal
– a return to the carbon mike …… WB6MXD 134
How Does Sideband Really Stack Up?
– the SSB solution? …… WB6JNN 136
Son of the Overload Relay
– if you can’t buy ’em build ’em! …… W2OLU 140
No-wire Antenna Switch
– a clever remote system …… WA0NUX 142
The Beeper
– NASA-type beeping …… WB8VQD WB8MHG/3 144
Ham Phone Answering Service
– leave messages …… W6GUU 148
Dear Good Buddy
– the perils of radio …… W7IDF 152
SWR Myth Exploded Again
– how does swr really affect signal strength? …… WA1JFU 156
Dirt Cheap Regulation
– virtually freebee …… W3GAT/2 158
A Vest Pocket QRP Rig
– if you have a big one …… K5JRN 160
Where You Can’t Solder or Weld
– joining dissimilar metals. …… WA4VWY 162
Exciting New Touchtone IC
– make phone calls with your HT …… WA0CKG 164
Revisiting the COR
– improvements on the April 76 model …… W7JSW 166
The Mighty Magnet Mount Antenna
– the price is right: zilch …… WA1PDY 168
A 15.75 kHz Oscillator
– simple TV test unit …… XE1CMB 170
Behavior Mod for the HM-l02
– pretty simple …… W3VT 172
Antenna Magic
– good advice on antenna fundamentals …… WB0HAF 174
See Yourself Talk
– build a sideband monitor scope …… VK5YH 178
The Hidden Charger
– simplest charger yet …… WB8IMY 180
IC Compressor-expander
– why go only halfway? …… Staff 182
Measure Your Wasted Power
– how much are you losing in your feedline? …… Staff 184
73 Amateur Radio Today – January 1977
