A New Wide-Range, High-Frequency Oscillator

A new tube is described which is fundamentally a Barkhausen oscillator with an electron gun and a cavity resonator. The tube is inherently inefficient, but is capable of tuning over extremely wide frequency ranges. For one single tube, for instance, the wavelength ranges from 4.5 to 12 cm and the output power from 0.1 to 1.0 watt.