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Illustration Of Hertzs Oscillator
Photograph - Photograph
Hertz's famous oscillator and receiver of 'radio' waves. The sender (left) was a spark gap loaded with two metal plates that acted like a condenser. Sparks in the gap radiated high frequency waves. When the second spark gap (right) and the ring were of the right size, the spark was reproduced without any wire connection.
March 13th, 2013
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