spark transmitter

American  

noun

Radio.

1. a transmitting set that generates electromagnetic waves by the oscillatory discharge from a capacitor through an inductor and a spark gap.

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spark transmitter British  

noun

1. an early type of radio transmitter in which power is generated by discharging a capacitor through an inductor in series with a spark gap

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Etymology

Origin of spark transmitter

First recorded in 1915–20