73 Amateur Radio Today – March 1962
Issue Contents:
Printed Circuit VFO
– Extreme stability and simplicity of construction in this 50 MHz VFO may bug you to build …… W5UB 6
Regulated Bias Supply
– Great for linears develops -20 to -120V @ 0-70 mA and presents only 6 ohms to grid …… W5IUR 12
Check Transistors with an Ohmmeter
– Here is the simplest test for transistors yet and it’s safe and works …… W9QKC 14
Radar Detector
– All you 2 500 MHz SWL’s (UNFL’s?) will appreciate this mobile receiver …… W6JAT 18
Ham TV Survey
– Ham TV is sprouting up all over. This will bring you up to date on its spread ….. W0KYQ 22
Blind Fasteners Aid Construction
– Using explosive rivets to hold things together …… W4WKM 24
Half-wave Transmission Line
– This gets around a lot of your antenna problems …… W2KPE 26
50 MHz No Crossmodulation
– Six meter converter designed for high signal density areas …… K6RNQ 28
Page from a Designer’s Notebook
– Transistorized carbon mike pre-amps …… W5SUC 30
Brew or Buy?
– Brew …… W4KOC 32
500 Watt Linear Amplifier
– Not 811A’s again? Well er… They’re cheap! …… W0RQF 33
The Strings the Thing
– We’ll print anything. What a kookie magazine! …… W7CSD 35
Nostalgic V-beam
– Think piece …… W2RWJ 37
The Tiny Terminator
– 50 ohm 20 watt dummy load built in Canada Dry Cola can. Too bad if this is not your brand …… K5JKX/6 38
Old Vikings Never Die
– Little hints to improve the Viking rigs. Might work on the DX-100 too …… W4AWM 40
73 Tests the Knight T-60 Transmitter
– Here’s another rig we can recommend. 80-6 meters 60 watts CW-aM …… W4WKM 42
Antenna Protection and Switching Unit
– Built outdoors where it should be. Keeps lightening out …… W5EHC 46
Is Marconi Like Spaghetti Daddy?
– Saga of the visiting amateurs as reported from England …… Margolis 50
Faithful Long-lasting Signal Booster
– It also works well and is simple to build …… W9ZDN 52
Evolution of the Bug
– Historical aspects of this oft used little mustered device …… W3WRE 54
Cure that Angry Band
– Audio’s selectivity with the FL-8 surplus audio filter …… W4THU 57
BCI in Your QSO?
– Keeping BC stations out of your receiver …… K2DHA 58
73 Tests the Viking Ranger II
– Johnsen has nicely updated their most popular rig …… W4API 61
High-level Mixer
– You can mix the full output of your exciter to any band you desire …… W5EHC 66
Zero-beatnick
– More fun with transistors …… K6BIJ 64
Modulation
– Our big technical article… This will make you an expert …… Staff 70
Propagation Charts
…… K2IGY 74
73 Amateur Radio Today – March 1962
