Today we’re going to look at crystal radio coils, and how you can build a good one. Not necessarily the best one, but one that delivers high performance for the materials available to you. The coil is the fundamental component of any crystal radio. In conjunction with a tuning capacitor, it forms a resonant… …Read More
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Crystal radios are famous for doing something almost magical: picking up broadcast signals with nothing more than a diode, an antenna, and a pair of headphones. They’re the simplest RF receivers yo…