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CV1731

Sensibly equivalent to:
CV1110 POSV2 S130
    
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The CV1731 neon voltage stabiliser is on a B4 base and is a design progression from the Cossor S130 that dates from the mid 1930's. The valve was specified by the GPO and thus also known as the POSV2.
The striking voltage is 160 V and the burning current is from 6 to 75 mA. Within the current range the regulation is 5 volts.
The cathode cylinder with supports either side.
The cylinder is closed at the top.
The balloon envelope is 50 mm in diameter and, excluding the B4 base pins, is 100 mm tall.
References: Data-sheet & 4010.

 

Pin Connections
B4
1
2
3
4
a
k
-
-

 

Absolute Maximum Operating Conditions
Stabiliser
Va
mAa
120
75
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated March 16, 2021.
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