(also crystal radio)
A simple early form of radio receiver with a crystal touching a metal wire as the rectifier (instead of a valve or transistor), and no amplifier or loudspeaker, necessitating headphones or an earphone.
- His enquiring mind made itself obvious very early on, when he put together the forerunner to AM stereo radio in a crystal set at home, when he was only 11 years old.
- He puts together a simple crystal radio locked on the single station, and arranges to smuggle dozens of them into the Project.
- I remember Pop telling me about listening with a crystal radio receiver, which involved a coil made by wrapping wire around a cylindrical container.
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