[AMPS] Vacuum Level in tubes

[L. Wald]

Just how good is the vacuum in the tubes?  Are ceramic tubes at the same
vacuum level as the glass envelope tubes?


Lawrence W. Wald
21000 Brookpark Road
NASA Lewis Research Center
Mail Stop 500-216
Cleveland, Ohio  44135
Voice (216) 433-5219
Fax (216) 433-8660



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