LAKHOVSKY MULTI-OSCILLATOR
Text: An oscillator of multiple wave lengths. It included all the basic wave lengths from 10 centimeters to 400 meters, that is, all frequencies from 750,000 per second to 3 billion. But each circuit emits many harmonics, which, with their basic waves, their interferences and their effluvia, can reach the scale of the infra-red and even that of visible light.
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Source: 90