Vacuum-Tube Engineering for Motion Pictures

Manufacturing and developmental technics of vacuum tubes are described with particular reference to their use in motion picture equipment. A brief discussion of how application requirements affect the choice of materials, structural design, and electrical characteristics of phototubes and amplifiers of both power and voltage types is included. How tubes are designed to meet specific needs is illustrated by reference to recent tube developments. Work on producing tubes having low-hum, low-microphonic, and low-noise characteristics is described as of special interest to the motion picture engineer. The paper closes with recommendations as to how to use vacuum tubes to best advantage.

Print ISSN

0097-5834

Published

1938-01

Content type

Original Research

DOI

10.5594/J14715