Electron oscillations with a triple-grid tube

An arrangement is described for producing ultra-short waves with a triple-grid tube. The data show that a type'89 triple-grid tube is a most satisfactory oscillator at a wavelength of about one and one-half meters. Experimental and theoretical considerations show that the oscillation produced by the triple-grid tube is of the well-known Barkhausen-Kurz and Gill-Morrell type.