73 Amateur Radio Today – March 1972
Issue Contents:
Converting The T-278/u Transmitter To 2m
– What would a surplus issue be without a surplus article? …… W6JTT 15
Converting The ART-13
– The supposedly dead resurrected ……W2ISL 19
Improving Your HR-2
– Better selectivity. FM article …… WA1KJI 23
Twelve Channels With The Regency HR-2
– Tsk another FM article! …… WA1KJI 24
Morse Centennial
– Morse died in 1872. His code hasn’t yet …… Miligram 25
Updating An Old Receiver
– Like for instance a 75A2 …… W8RHR 27
Learning From Emergencies
– Los Angeles SCM report reprinted …… W2NSD 31
Solid State Tunable I-f: Part II
– 1650 kHz better than 455. Much better …… K1CLL 33
Checking Zener Diodes
– Using a voltmeter …… WA0ABI 37
General Class Questions & Answers
– Practice questions. You read the book …… K5JKX 39
Technical Aid Group
– An old 73 feature reborn …… Staff 48
Putting The ARC-3 On Two
– Superbargain 2m rig …… WA4NAI 49
Blown Fuse Indicators
– For ac or dc fuses …… W0EDO 59
Nonlinear Resistors
– Such as light bulbs thermistors etc …… W6GXN 65
Constant Current Charger For Ni-cads
– They’re expensive so be nice to them …… K6MVH 69
The ESM/l Transceiver
– Solid state pocket CW surplus rig …… WB6BIH 73
Low Cost Transistor RF
– With typical transmitter circuits …… WA8ZEL 75
Updating the W1PLJ Counter
– From Feb. 68 issue of 73 …… W6GXN 101
Circuits. Circuits. Circuits
– Circuits …… Staff 109
Simple Diode Controller
– “Dimmer” for soldering iron …… W2OLV 113
Low Pass Filter In Action
– Take that TVI! …… VE3GSP 115
Overseas Patching
– Mars does our public service for us …… K6GKX 121
Confessions Of A Surplus Hound
– Neil is an old friend of Wayne’s …… W2OLU 125
73 Amateur Radio Today – March 1972
