Double triode tube designed for voltage amplification and low frequency oscillation. Equivalent of 2C51 / 5670 / 6CC42. Made by 'Reflector' factory for military equipments.

Filament voltage, V: 6.3;

Anode voltage, V: 150;

Filament (heater) current, mA: 350±35;

Anode current, mA: 8.75±3.25;

Mutual conductance, mA/V: 5.9±1.9;

Gain coefficient: 34±7;

Inter electrode capacitance, pF: input: 2.4±0,65 / output: 1.3±0.35

Operation time, h: 5000.