Title:
MEASURING METHOD FOR CATHODE ACTIVITY OF TRAVLING-WAVE TUBE
Document Type and Number:
Japanese Patent JPS5414664
Kind Code:
A
Abstract:
PURPOSE: To disciminate how much a cathode deteriorates by measuring cathode activity easily and accurately, by measuring the variations of a helical current at the time of deteriorating the cathode temperature of a traveling-wave tube down to a temperature-limited range.
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Inventors:
SUGAWARA TSUTOMU
Application Number:
JP7999977A
Publication Date:
February 03, 1979
Filing Date:
July 06, 1977
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE
International Classes:
G01R31/24; H01J25/34; H01J25/36; H03F3/58; (IPC1-7): H01J25/34; H03F3/58