The Audion oscillator

The article covers the theory and operation of Audion oscillator circuits. It embraces phase relations in various circuits, frequency of operation, simplification of complex circuits, and the behavior of oscillators as a function of its many variables. Vector diagrams are given of the phase relations in several simple circuits. The similarity of more complicated circuits to the simple ones is illustrated and the manner of determining the mode of operation of them by resolving into simple ones is given. A series of curves showing the behavior of an oscillator as the six independent variables in the circuit are varied, is illustrated by a series of curves and a method of quickly and easily adjusting a circuit to its proper working condition is pointed out from them. The problem of securing high efficiency is also discussed and requirements toward that end are pointed out.