Excerpt from Dependence of the Input Impedence of a Three-Electrode Vacuum Tube Upon the Load in the Plate Circuit The equations of the input impedance for a capacity load can likewise be derived readily from equations and In this case the input resistance will always be positive, so that the input absorbs power. Thus the presence of phones in the plate circuit of a tube may cause a dissipation of power in the input, because of the phones having a capacity reactance at high fre quencies. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.