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Electronic Schematic Components Symbols > What is Cathode, Electron-Tube,
Indirectly Heated |
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Electronics Component Symbols |
What is Cathode, Electron-Tube,
Indirectly Heated (  )
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The present invention relates to the manufacturing method of an indirectly heated cathode comprising the formation of a black film on the internal surface of a cathode sleeve, which contains a reducing material, the black film being formed by heat reduction of a thin film of a metal oxide, which has previously been formed on the internal surface of the cathode sleeve. The indirectly heated cathode manufactured by this method has shorter emission warm up time for the emission of electrons and lower power consumption compared with those manufactured by conventional methods. |
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