The classic crystal radio was an oatmeal box with some wire and a few parts. [Michael Simpson] has something very different. He found an assembled Philmore “selective” radio kit. The simple kit had a ...

If you are ready to take a break from high-speed, complex digital systems, consider becoming a “rock hound” and constructing a crystal radio, one of the earliest forms of receivers. For close to 100 ...

Crystal radios can feel magical, given their ability to tune in audio from distant stations with nothing but the energy from the radio signal itself. However, to achieve this feat, they typically rely ...