Sensibly equivalent¶ to:
The VR22 battery triode was a popular type and had many equivalent types. The service types show that it was used by all armed services from the 1930s. As an audio output valve it produced 0.18 Watts.
Power was a wet accumulator for the filament and a dry battery for the anode supply.
The balloon envelope is 38 mm in diameter and, excluding the B4 base pins, is 80 mm tall.
References: Datasheet & 1043. Type VR22 was first introduced in 1935.
Absolute Maximum Operating Conditions¶
Updated April 04, 2015. shape:balloon construction:pinch type:triode age:1930.1940 base:b4 heater:2.0v pins:4 pin:1.a pin:2.g1 pin:3.f pin:4.f