Jim has even created names for some of these radios, such as the ‘hobbydyne’ receiver which is available as a kit. Learning by building a crystal set is ubiquitous. A how-to book from East ...

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 ...