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spark transmitter

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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Origin of spark transmitter

First recorded in 1915–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for spark transmitter

spark transmitter

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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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012