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Apollo telescope mount SEC camera tube spares programAn important engineering improvement was made during the Spares Program. The thermionic cathode structure was modified to bring the cathode temperature to a more suitable value and shields were placed over the glass-to-metal interface of the stem leads to reduce the possibility of interelectrode leakage. The cathode temperature change has resulted in a corresponding change in the recommended operating conditions for the heater of the thermionic cathode. All tubes built during the 1972-1973 ATM Spares Program should be operated with a heater current of 150 mA (6.3 volts). Operation at lower currents and voltages adversely affects the life of these tubes.
Document ID
19730019355
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Green, M. (Westinghouse Electric Corp. Elmira, NY, United States)
Harder, R. D. (Westinghouse Electric Corp. Elmira, NY, United States)
Date Acquired
September 2, 2013
Publication Date
June 1, 1973
Subject Category
Electronic Equipment
Report/Patent Number
NASA-CR-124342
Accession Number
73N28087
Funding Number(s)
CONTRACT_GRANT: NAS8-29063
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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