73 Amateur Radio Today – June 1972
Issue Contents:
Six Elements on Twenty Meters
– Eliminate QRM …… VE3GEJ 17
Slow Scan Television
– Basics …… G5ZT 21
Beaming the Vertical Antenna
– On the low bands …… W6AJE 27
Active Filter Design and Use
– All kinds of filters Part I …… K3PUR 36
Antenna Party
– Simplified erection …… W0BMW 45
Radio Astronomy for Amateurs (Part II )
– Projects for amateurs to tackle …… W4ZBE 51
Patenting Your Invention
– Why not … why? …… Hunter 61
20 dB Beams
– Design and construction of VHF antennas …… K1CLL 67
Converting the Progress Line
– FM featurette …… WB9CXE 75
Phasing Multiband Verticals
– Ten thru eighty meters …… K0WF 85
Ham TV and Public Service
– PR the name of the game …… W9JER 89
Modified Suction Cup Antenna
– Not too modified …… WZEE4 93
300 MHz Frequency Scaler
– Extends frequency counters to VHF …… K2OAW 97
73 Reviews the Savoy Antenna
– Two and three band with vacuum traps …… W4FQM/1 101
Care and Feeding of Tape
– RTTY featurette …… WA6PIR 109
Circuits Circuits Circuits
– And more circuits …… Staff 111
RTTY Filters
– Elliptic function filters …… W5EZM 115
Step On the Klutz!
– Bob Manning rides again …… K1YSD 123
Trouble Shooting For the Novice
– You don’t have to send it back …… WA8OIK 129
Low Cost C D Ignition
– It has advantages …… W1KNI 133
Lightning!
– Its cause and cure …… W2FEZ 139
73 Tests the Regency Amplifier
– 2m amplifier for FM is a beaut! …… W4FQM/1 145
73 Amateur Radio Today – June 1972
