Thermionic vacuum tubes and their applications

Note: The present material was originally prepared for the National Research Council for use in a proposed Manual on “Physical Research Methods and Technique.” As the appearance of the Manual has been postponed, the Committee in charge of its preparation has kindly consented to the separate publication of some of the sections in various technical magazines. In order to meet the requirements of the Manual, the form of expression has been made as compact as possible with practically no discussion of theory and no derivation of formulas. Since this style of presentation leaves much to be desired from some points of view, references have been given to the original literature wherever possible. However, many of the vacuum tube circuits presented have not as yet been treated in the literature. In the preparation of the new material the author has been greatly helped by persons whose contact with these subjects is at first hand.