Date of Award

Summer 1947

Document Type

Thesis

Degree Name

Master of Science

Department

Physics

Abstract

Many tube checkers designed for radio receiving tubes have been developed . Most of the devices for test­ ing these tubes do little more than check the emission of the cathode. This is usually accomplished by applying alternating voltage to the plate of the tube undergoing the test and reading the direct-current component of the plate current . In this case, the control grid bias volt­ age is usually set at a fixed value although sometimes facilities for varying the bias are provided. If the tube is of the multi-grid type, all the grids except the control grid are connected to the plate, thereby eliminating their effects on the operation of the tube.

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