Файл:Crystodyne oscillator circuit.png

This is the schematic diagram of the oscillator shown in Crystodyne zincite oscillator - top.png and Crystodyne zincite oscillator - side.png, built by Hugo Gernsback in New York to Losev's instructions. It can produce radio frequency output up to a few megahertz. The active device is the "cat's whisker" diode D, consisting of a crystal of zincite (zinc oxide) with its surface lightly touched by a steel wire on an adjustable arm. It is biased into its negative resistance region by a DC voltage of 4 - 30 volts applied by battery B and potentiometer R. The negative resistance of the diode excites oscillation in the series tuned circuit, consisting of capacitor C₁ and variometer inductor L₁. Before operation, a sensitive contact point must be found on the surface of the crystal. To do this switch K is turned to the upper position, which switches a second tuned circuit in, L₂ and C₂ which oscillates at audio frequency. The wire is dragged across the surface of the zincite crystal until a tone is heard in the earphones, indicating the oscillator is working. Then switch K is turned back to the lower position, switching the RF tuned circuit in. The component values from the source are R = 3 kΩ, L₁ = 5 mH, C₁ = 10 pF, L₂ = 1 H, C₂ = 2 mF. With these values the frequency of oscillation is approximately

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