On the Voltage Amplification Ratio of the Triode Valve Resistance Amplifier

Abstract

The voltage amplification ratio of the triode valve resistance amplifier is measured in the audio frequency range by means of an alternating current potentiometer As the source of the alternating current, Triode valve oscillator is used.
The relation between the amplification ratio and the resistance in the plate circuit and the amplitude of the impressed alternating voltage at the grid, is studied experimentally. It is observed that in the amplifier which has a grid condenser, the grid average voltage is affected to a great extent by the input grid alternating potential due to the rectifying action and this will cause the change of the amplification ratio by the change of the amplitude of the input grid alternating potential.
From the static characteristics with the resistance in the plate circuit, which is called the resistance static characteristics, all the dynamical phenomena are explained (March, 1923)