The crystal radio is a time-honored build that sadly doesn’t get much traction anymore. Once a rite of passage for electronics hobbyists, the classic coil-on-an-oatmeal-carton and cat’s ...

He found an assembled Philmore “selective” radio kit. The simple kit had a coil, a germanium diode, and a crystal earphone. We were sad when [Michael] accidentally burned a part of the radio ...