单词 | crystal set |
释义 | crystal set(also crystal radio) noun 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....
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