73 Amateur Radio Today – April 1970 with Index
Issue Contents:
A Noise Blanker That Works
– As opposed to that crummy one in Brand X that doesn’t work. And can be added to your present receiver easily …… W8RHR 17
Hot Carrier Diode Mixer Converter
– This is not an April Fool article …… WA6NCT 20
Examining FM Repeater Operation
– History of repeaters ARRL involvement and legal problems …… WB6DJT 28
A Repeater Controller
– Tone generator timer identifier the lot …… WA4YND 34
Understanding the Carrier Operated Repeater
– Some of them take a good deal of understanding …… K6MVH 41
Evaluation: Standard 2M FM 12 Channel Receiver
– Okay …… W6QGN 46
7/8 Wave Mobile Antenna for 2 Meters
– Why have a puny signal when you can have a mediocre signal …… W2EUP 50
How Do Ham Stores Decide Their Trade-in Figures?
– $200 for your S-38? …… W2CFP 55
Beryllia- The Lethal Refractory
– Worse than cyclamates …… WB2PAP 58
Getting Your Extra Class License Part XV
– Spurious radiation is covered …… Staff 62
A Work Session On The Wichita Repeater
– If anything can go wrong …… W0DKU 78
In expensive Semiconductors for the Ham
– Giant Motorola ad that we paid for …… WA7KRE 81
Renovating Surplus Meters
– Making new scales for meters calibrating and like that …… WA0ABI 84
A Bias Regulator for Linears
– Simple gadget makes Class B linears practical …… ZL2ANG 86
High Performance I-f and AGC System
– Particularly for CW and SSB …… ZL2BDB 89
Single Sideband on the All-wave Radio
– One transistor BFO and no connections …… W7CSD 94
Vacuum Tube Load Box
– Invaluable for testing power supplies. Invaluable …… Ashe 96
Repeater Directory
– Special book length feature with photos coverage maps and access data …… Staff 99
A Word About Repeaters
– A special featurette …… WB2AEB 100
The Fine Points Of FM Operation
– Getting on frequency and other fine points …… WB2AEB 121
How To Megger Your Antenna
– It’s not dirty …… W2EEY 125
73 Amateur Radio Today – April 1970 with Index
