Double triode tube designed for voltage amplification and low frequency oscillation. Equivalent to the 2C51 / 5670 / 6CC42. Tubes manufactured by Reflector factory (Russia).

Filament voltage, V: 6.3;

Anode voltage, V: 150;

Resistance in cathode circuit, Ohm: 240;

Filament (heater) current, mA: 350 (+/-) 35;

Anode current, mA: 8.75 (+/-) 2.75;

Mutual conductance, mA/V: 4.8-6;

Gain coefficient: 36 (+/-) 8;

Inter electrode capacitance, pF: input: 2.8 / output: 1.4;

Operation time, h: 1500.