The Specifications and Characteristics of Moorhead Vacuum Valves

A number of types of Moorhead tubes are described, together with the mode of testing them and the specifications to be met. The tubes obtained are classified as detectors or amplifiers, which types the authors regard as separate and generally non-inclusive. The effects of small variations of a number of the tube dimensions are exhaustively studied, and conclusions are drawn as to the effect of varying the various tube dimensions.