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0B2

Sensibly equivalent to:
108C1 108C1 6074 CV1833 CV1833 G108/1K QS1208
    
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The 0B2 is a B7G voltage stabilizer. These devices were made obsolete by the Zener diode.
The regulation of the 0B2 was 3.5 Volts for currents of between 5 and 30 mA. So the voltage across this tube in service would have been held at between 106 and 110 volts. The tube strikes at a voltage of 133 volts.
The construction is of a central rod anode within the outer cathode cylinder. The gas filling was neon.
The valve is also marked as a CV1833 indicating direct equivalence.
The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 57 mm tall.
References: Datasheet & 1040. Type 0B2 was first introduced in 1948.

 

Pin Connections
B7G
1
2
3
4
5
6
7
a
k
ic
k
a
ic
k

 

Absolute Maximum Operating Conditions
Stabiliser
Va
mAa
108
30
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated November 10, 2017.
shape:thin.glass.tube construction:all.glass type:voltage.stabiliser age:1940.1950 base:b7g pins:7 pin:1.a pin:2.k pin:3.ic pin:4.k pin:5.a pin:6.ic pin:7.k
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