Accession Number : AD0491909

Title :   OXIDE CATHODE AND PRIMARY GRID EMISSION STUDIES.

Descriptive Note : Monthly rept. no. 21,

Corporate Author : WESTINGHOUSE ELECTRIC CORP BLOOMFIELD NJ LAMP DIV

Personal Author(s) : McNall, J. W. ; Ivey, H. F. ; Young, R. G.

Report Date : 07 FEB 1949

Pagination or Media Count : 10

Abstract : A summary is presented of what has been learned up to the present time concerning breakdown in 715B tubes. It has been show that the screen grid starts the delayed type arc. Now it is shown that the control grid initiates those normal type arcs which occur inside the anode cylinder. Several possible causes of arcs are discussed. Preliminary experiments on the thermionic emission from extruded carbon filaments are discussed. A satisfactory spring design for these filaments has now been attained. (Author)

Descriptors :   (*OXIDE CATHODES), (*THERMIONIC EMISSION), ELECTRON TUBES, ELECTRIC ARCS, FILAMENTS, CARBON, CONTAMINATION, ANODES(ELECTRON TUBES), THEORY, FIELD EMISSION, MOLYBDENUM, METAL COATINGS, GOLD.

Distribution Statement : APPROVED FOR PUBLIC RELEASE