Rated electrical data (per triode)
Filament voltage, V 6.3
Anode voltage, V 250
Resistance in the cathode circuit for automatic bias, Ohm 600
Filament current, mA 600±50
Current in the anode circuit, mA 8±2.4
Characteristic slope, mA/V 3.2
Characteristic slope at filament voltage 5.7 V, no less, mA/V 2.7
Internal resistance, kOhm 11
Gain 35±7
Maximum permissible electrical values (for each triode)
Highest filament voltage, V 7.0
Lowest filament voltage, V 5.7
Highest voltage at the anode, V 300
Maximum power dissipated at the anode, W 2.0
The highest constant voltage between the cathode and the heater, V 250
Maximum current in the cathode circuit, mA 25
Maximum leakage current between cathode and heater, µA 30
Lowest resistance in the cathode circuit for automatic bias, Ohm 600
The highest resistance in the grid circuit, MOhm. 0.5