73 Amateur Radio Today – May 1967
Issue Contents:
The Quad-quad-quad
– Sixteen quads on a single mast for 144 and 432 …… VE3DNR 6
The Expanded Quad
– More gain and directivity on 10 15 and 20 …… WA5KXY 16
An Inexpensive DX Antenna
– A low-cost two-element quad for DXer’s ……WA6WUI 20
The Miniquad
– A practical small size quad for twenty meters …… WA2APT 23
A Full-size 7 MHz Rotary Cubical Quad
– For hams with big backyards …… K6DDO 26
Experiments with Quad Antennas
– Optimum designs for HF and VHF quads …… IIRR 32
The Half-quad Antenna
– Half a quad is better than none …… W0SII 35
The Three-element Quad
– For cracking DX pileups on 20 meters …… K8YIB K8DYZ 38
A Light Four-element Quad for 20 Meters
– Lightweight but potent …… K0UKN 41
Tilt That Quad at a Dollar a Foot
– Forty feet for $39.75 …… W7UXX 46
An Easy-to-erect Quad
– The “Down-under” approach to building quads …… VK5BI VK5VB 50
Quad Bibliography
– Twenty years of quad antennas …… W1DTY 53
A FET VFO for 80 Meters
– High-stability with FET …… W1DTY 56
Tube Symptom Troubleshooting
– If you must use vacuum tubes …… WA0NEA 61
A 200 Watt Dummy Load for $2
– For low-interference tuning …… W2OLU 66
The Easy Way to Decibels
– But not completely without math …… K3PXT 69
The Highflyer
– A complete homebrew receiver for 80 through 10 …… W6BLZ 72
Geometric Circuit Design
– Designing complex circuits with a ruler and protractor …… Bradford 82
A Field Effect Transistor Converter
– Low cross-modulation on 10 15 and 20 …… K6DQB 86
WWV on the Mohawk
– Without a lot of work …… K8KWQ 89
High-pass Receiving Antenna Filters
– Eliminating spurious signals in HF receivers …… K6KA 90
Climbing the Novice Ladder: Part 6
– Joe and Judy take the code test …… W7OE 97
The Heathkit HW-32A 20 Meter Transceiver
– One of Heath’s new single-banders …… W1DTY 102
Gus: Part 23
– A hot trip through darkest Africa …… W4BPD 106
73 Amateur Radio Today – May 1967
