73 Amateur Radio Today – September 1979
Issue Contents:
Power Line DXCC (Distant Control Circuit)
– the ac lines are a already there… why not use ’em for remote control? …… W9CGI 34
Blueprint for Biofeedback Experimentation
– fertile ground for pioneers …… WD5BNL 42
The History of Ham Radio
– part X …… W9CI 44
Maximum Security for the 22S
– remote control puts your Icom in the trunk …… K8KW 48
The Big Blinker
– a visual signal for the deaf …… AD5X 50
Morse Converter for DMMs
– super gadget for blind hams …… WA6AXE/3 52
How to Home-brew Your Own Crystal Filters
– the series-string method …… Staff 56
Four Bands on a Bamboo Pole
– try a Chinese vertical slanter on 10 through 40 …… W0VM 60
The Triton IV Goes QRP
– simply and efficiently …… W1FK 64
Experimenter’s Corner: The MM5369N
– how many uses can you find for this one-chip crystal oscillator? …… Patten 68
Digital Readout Rotator Control
– can the microcomputer connection be far behind? …… K8TMK 72
Build the KIM Keyer
– with a 3-message memory …… K0EI 80
No More TR5-80 Cassette Woes
– E-Z loader does the trick …… WA9PUL K9POX 96
The Incredible Shrinking Transceiver
– build it on two tiny PC boards …… K4DHC 100
In Quest of Perfect Break-in
– well almost perfect …… WB7CMZ 106
The Amazing Audio Elixir
– this limiting amp is a cure-all …… N6WA 116
No More Rotary Switches
– gadget freaks will love these solid-state replacements …… WA2FPT 118
Confessions of a Teenage HFer
– the world between channel 40 and 28 MHz …… Peter 122
70-wall Shoes for the IC-502
– put some punch in that 6m signal …… WA1PDY 128
The Big Bopper
– a 5-band phased vertical array …… W0VDJ 136
73 Amateur Radio Today – September 1979
