pulling radio signals out of thin air as if by magic. Not all crystal sets take this slapdash approach, of course, and some, like this homebrew multiband crystal receiver, aim for a feature set ...

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 earliest and cheapest radio set for the home was the crystal set. The essential components were a fragile fine wire (the 'cat's whisker') acting as an aerial connected to a small piece of ...