This standard applies to generators, modulating control lamps with a power dissipated by the anode over 25 W
GOST 21106.8-1977 Referenced Document
GOST 21106.0-1975 Oscillator, modulator and regulation tubes anode dissipated power more than 25 W. Method of measurements of electrical parameters. General principles
GOST 21106.8-1977 history
1977GOST 21106.8-1977 Oscillator, modulator and regulation tubes with anode dissipated power above 25 W. Methods of measurements of cathode emission
1975GOST 21106.0-1975 Oscillator, modulator and regulation tubes anode dissipated power more than 25 W. Method of measurements of electrical parameters. General principles