This guiding technical document specifies the filament and hot filament voltage series of electron tubes. This technical guidance document applies to electron tubes with directly heated cathodes and interheated cathodes. This technical guidance document does not apply to the following electronic tubes: a. Vacuum tubes with filament circuits connected in series; b. The working state of the filament circuit is determined by the filament current; c. An electron tube that adjusts its working status by changing the filament voltage; d. The power supply to the filament circuit is individually adjusted for the tubes.
SJ/T 10623-1995 history
1995SJ/T 10623-1995 Series of filament voltage and heater voltage for electron tubes