Further extensions of the theory of multi-electrode vacuum tube circuits

The response of circuits containing vacuum tubes with any number of electrodes due to impressed electromotive forces, and under such circumstances that the time of transit of the electrons is negligible, is discussed when arbitrary feedback is present between the circuits connected to the electrodes, each of which may carry conductive current. The use of the theory is illustrated by obtaining first and second order effects in typical three-electrode tube circuits. In a previous paper in the Bell System Technical Journal, October, 1934, the treatment was restricted to three-electrode tube circuits in which it was assumed that the amplification factor of the tube was constant and that no conductive grid current was present. In the present paper these restrictions are removed.