One of the mysteries of the English language finally explained.
A fine adjustable wire in a crystal radio receiver.
- ‘It is made from a coil of wire, a cardboard roll, has an aerial, a crystal (germanium diode), an earplug and a piece of wire called a cat's whisker.’
- ‘For entertainment at home we sang around the piano or from 1925 we listened to our wireless - the cat's whiskers kind of early radio.’
- ‘It took two burly labourers to manhandle the huge walnut and Bakelite tuner onto the Lilo, but within hours the valves had warmed up, and the cat's whisker proved remarkably sensitive.’
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