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Bliley Electric Company History: The Ear

History of the company that invented and patented the overtone crystal, etch-to-frequency and variab

Crystal Oscillators

From N6EV. Tube oscillator schematics, and discussion.

N6QAB Radio Direction Finding

Pictures and descriptions of radio direction finding and related equipment.

The Telegraph Wireless World

N6TT's site about amateur radio and communication via Morse Code.