Low frequency beam tetrode intended for output stages audio amplifiers (single ended and push-pull) in battery receivers.

Life length: 500 hours
Filament (heater) voltage: 1.2 or 2.4 V
Filament (heater) current: 60 or 30 mA (+-10%)
Anode voltage: 60 V (90 V maximum)
Anode current: 3.5 mA (+- 1.2)
2nd greed voltage: 60 V (90 V maximum)
2nd greed current: 0.8 mA
1st greed voltage: -3.5 V
Mutual conductance: 1.1 mA/V
Output power: 50 mW (0.4 W maximum)