This standard applies to generator, modulator and control lamps with a power dissipated by the anode over 25 W and mouth
GOST 21106.7-1977 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 21106.7-1977 history
1977GOST 21106.7-1977 Oscillator, modulator and regulation tubes with anode dissipated power above 25 W. Method of measurement of cathode current
1975GOST 21106.0-1975 Oscillator, modulator and regulation tubes anode dissipated power more than 25 W. Method of measurements of electrical parameters. General principles