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VR22

Sensibly equivalent to:
220PA AR5 AR6 CV1022 CV1166 CV1304 LP2 NR42
See also:
CV1166 short entry
    
Extras ▼

 

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.
The CV1022 is the same valve and both were based on the Cossor 220PA.
Power was a wet accumulator for the filament and a dry battery for the anode supply.
The anode is wide but the front to back dimension is small, about 3.5 mm. The etched VR22 can be seen.
The filament tension springs are supported on a mica that is spaced above the main top mica.
The tension springs. The support mica is attached to the grid support rods and the spacing is achieved by strips of metal spot welded to the rods.
The balloon envelope is 41 mm in diameter and, excluding the B4 base pins, is 83 mm tall.
References: Datasheet & 1043. Type VR22 was first introduced in 1935.

 

Pin Connections
B4
1
2
3
4
a
g1
f
f

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
2.0
0.2
150
-4.5
10.0
4000
4.0
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 04, 2015.
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