The Grid-Coupled Dynatron

This paper deals with an improved oscillatory system wherein the dynamic excursion is associated with the secondary emission region of the vacuum tube characteristic, plate current vs. plate voltage. A more or less conventional dynatron oscillator, using a tetrode, is improved by feeding back some of the output power to the inner grid. The maximum increase in oscillatory power was found to be about fifty per cent above the same system with a static control grid potential.