73 Amateur Radio Today – June 1971
Issue Contents:
Driven Versus Parasitic Antenna Elements on Two Meters
– Are they really better? …… W6AJF 12
3 Squares for Two
– Humdinger Quad …… K8CFY 18
I Can’t Learn the Code
– Too bad. See you on eleven meters …… W0FEV 22
Covering Additional Frequencies With Dipoles
– 40/15m 80/10m etc …… W9EGQ 26
Weather Balloon Verticals
– The only way to go is up …… K4EPI 32
Squelch Addition for the Pocket Pager
– You don’t have a pocket pager? …… WA8PIA 34
VFOing the Twoer
– Drive your friends off two meters …… WA3WHI 40
Transmitter Tuning of Mobile Antennas
– Loading coil final tank circuit …… W2EEY 44
I Built a Counter
– The Heath. It works …… Sessions 48
Low Cost Transistor Power Supply
– Also powers high cost transistors …… W8AVR 52
Don’t Trust the Ground Wire
– Particularly if it is over 30 …… W5FQA 54
The File Box Capacity Decade
– Handy …… WB4ITN 56
A Practical 40 Meter DX Antenna
– 4 honest not to be sneezed at dB! …… W7JLU 60
A Commercial Bid for the 450 Market
– Meet the Alpha 100W amplifier …… Staff 63
Modification to HW Transceivers
– Adding headphones …… WB2WYO 65
CW Selectivity
– For the sideband receiver …… ZL4OK 68
General Class Study Guide: Part IX – Putting the “Tell” in “Tele”
…… Staff 80
73 Amateur Radio Today – June 1971
