73 Amateur Radio Today – December 1969
Issue Contents:
Quick Easy Dependable Transistor Diode Checker
– For those who like checkered diodes …… W6ICC 6
Did Samuel Morse Really Invent the Telegraph?
– Telegraph? What’s that? …… W2FEZ 10
Combination Dummy Load/attenuator Network
– Also doubles as a hot plate for your coffee warming …… W2EEY 14
Tuned Filter Chokes – The Easy Way
– Can your filter chokes carry a tune? …… W2OLU 18
Hey OM – You’ve Got Carrier There
– “Drop dead you knit-picker.” …… W4NVK 22
Bandswitching the Swan-250 and TV-2
– For both six and two meter operation lickety-split …… K3LNZ 26
Cheap and Easy Selectivity
– A CW audio filter for under $10. Cheap enough …… W5INU 28
VHF-fM – Part III : Hand Held Portables
– Part 3 in our effort to brainwash you in to trying FM …… WB2AEB 30
Sunspots and the Ham
– If you can’t beat ’em join ’em …… WB2VFX 32
SSTV
– Lecture at the International Congress of Amateur Television …… SM0BUO 34
Amateur Radio in the Classroom
– Drives the kids right out of their everlasting minds …… K0HUD 40
The Galaxy RV-550 Remote VFO
– Test Report from an excited and happy user …… W6AJZ 48
Calculation Made a Little Easier
– Stuff our dumb high schools should have taught …… W1EZT 50
Universal Dual-frequency Crystal Calibrator
– Using those new IC circuits …… W2EEY 58
Versatilize Your Transceiver
– Adding incremental tuning a blessing in no disguise …… VE3ECU/w0 62
Transistor Class B and C Power Amplifier Design
– Slide rule lovers arise and rejoice… an article for you! …… VK3ZRY 64
Two for Mobile
– Power supplies not a love story …… K6ZFV 70
Amateur Microwave Frequency Meter
– 1 to 10 ghz. Simple but necessary test equipment for ghz tinkerers …… K1CLL 72
Audio Organizer
– Nice companion unit for the station transceiver …… WB2WYO 77
Converting a CB Transceiver to Six Meters
– What else can you do with them? …… WB6BIH 78
Extra Class License Course Part XI
– Oscillators …… Staff 82
Topographical Maps for the Radio Amateur
– For transmitter hunts and other hammy applications …… W9VZR 102
Fascinating Fundamentals III : Magnetism
– An irrelevant dip into history …… W2FEZ 10
73 Amateur Radio Today – December 1969
