73 Amateur Radio Today – September 1969
Issue Contents:
A DX Curtain for 15 Meters
– An easy 3-4 db gain for you …… VE1TG 4
Tunnel Diodes-theory and Practical Application
– Including a one transistor solar powered transmitter …… K8TSQ 8
The Magic T
– Method for running rf transistors in parallel …… Thorpe 14
Uncle Will and News from the Poudre Valley
– In dialect yet …… K0DVI 19
Basic Soldering Outfit
– Good Lord! Another article on soldering! …… W1EZT 20
Light Naturally Runs Down
– A special Scientific American type feature …… K1CLL 24
Cable Pickup and Shielding
– Keeping interference to an absolute minimum …… W2EEY/1 36
WWV-pioneer in Standards Broadcasting
– Perhaps you’ve heard the catchy tune they play …… WA1AAU 39
Basic Theory and Application of Transistors
– Something you have always wanted to know …… WA1FHJ 42
Series Gate Solid State
– Clipper …… K6ZFV 50
Improving NC-300 SSB Reception
– It was good but it can be very good …… W1OOP 52
AFSK Generator
– Crystal controlled using digital IC’s no less …… W1ESH 53
Transistor Transmitter Aspirin
– How to keep from westernizing your transistors …… K0VQY 64
Improvement of Phone Intelligibility by Base Clipping
– Discussion of base clipping …… Ives 68
Measurement of Meter Resistance
– Making it possible to versatilize your meters …… WA6NIL 72
Diode-stack Power Supplies-the Easy Way
– Instant operation of the Henry 2K and other rigs …… K6KA 74
Transistor Testing Techniques
– Testing with a vom without destruction …… W9KXJ 76
2 1/2 W Transmitter
– Work the world with this three transistor rig …… K0VQY 78
Neutralizing the HX-10
– Simple way to stabilize this rig …… W2PQG 80
More Taylor Modulation
– Remember that AM is still going strong on VHF …… DL5KS 84
An Audio Sinusoid Generator
– Two IC’s …… W5FOO 88
Capacitor Usage and Electron Flow
– Where to use what capacitor and why …… W0HMK 90
What About FM?
– We’ll have you on FM within the year …… W9VZR 96
A Primer on Radio Propagation
– If signals really do bounce this is how it works …… WA1GEK 98
Measurement of Percentage of Modulation
– Of AM transmitters…… Granger 106
Extra Class License Course Part VIII
– let’s get cracking …… Staff 108
Big Signal-good Looks
– 3-400Z kilowatt Linear …… WA7AIA 124
A New Vidicon Camera for ATV
– Isn’t it time you tried your hand at ham TV? …… W8VCO 129
Two More Transistor Testers
– Handy jf you by your transistors by the bag full …… W9DJZ 133
The FETCompressor
– Audio compressor using two FET’s …… WA0IOC 139
The Mike Mixmaster
– Just like a broadcast station …… WA2YRF 140
The T-60 Works Just Fine
– Part XVII of our Novice Instruction Manual …… WA1GEK 142
Leaky Lines
– Not to be confused with columns in other magazines …… K2AGZ 144
A Unique RF Plate Choke
– Actually it isn’t really all that unique …… W6RET 147
Modification of the ac Input on the SB-200
– Published by popular demand …… K3KMO 148
73 Amateur Radio Today – September 1969
