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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B IS FOR “BOMB”: Big sunspot AR2738 is crackling with B-class solar flares. This morning in France, astrophotographer Philippe Tosi caught the sunspot in mid-flare, inserting an image of Earth for scale. On the “Richter Sc... Read more