A look at a simple superhet receiver designed for CW reception. Describes each stage and demonstrates the homebrew crystal filter in operation. A 7 MHz receiver is shown but additional information on how this may be adapted to provide 14 MHz coverage is given as well.
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In early December 1961, a United States Air Force rocket took off from Vandenberg Air Force Base in California carrying a special payload. The main payload was a Corona surveillance satellite, but tucked just aft of that spacecraft was a ti... Read more