Fast warm-up cathode for high power vacuum tubes

Details Fast warm-up cathode for high power vacuum tubes Fast warm-up cathode for high power vacuum tubes

H - Electricity

01

J

313/167, 316/45

H01J 19/06 (2006.01) H01J 1/15 (2006.01) H01J 9/04 (2006.01) H01J 23/04 (2006.01)

Patent

CA 2008295

Abstract of the Disclosure In order to bring a high power vacuum tube to full power in a few seconds, it is necessary to heat the cathode quickly to 1100°C. In large tubes, prior art structures cannot be simply enlarged. A novel cathode structure in which the heater element is anisotropic pyrolytic graphite coated with anisotropic pyrolytic boron nitride for insulation and then sintered to the cathode avoids these problems.

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