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VS68

Sensibly equivalent to:
A2235 AW4 CV1068 STV280/40
See also:
Marconi Stabilovolt Advert - Marconi Stabilovolt Advert - Marconi Stabilovolt Advert - Stabilised Power Unit - CV110 short entry
    
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The VS68 is a four in one voltage stabiliser that GEC marketed as the Stabilovolt. The commercial designation is STV280/40 and has a maximum current draw of 40 mA. Also made was the STV280/80 with higher current rating.
It has four anodes, and thus four outputs with gaps of 70 volts each. These output voltages are 70, 140, 210 & 280.
The striking voltage is above 420 Volts and the tube current is 5 - 35 mA. The tube voltage regulation is about a couple of Volts for each 70 Volt step.
The pinch showing how the leads to the cathode and four anodes are shrouded in glass as far as possible.
The inner cylinder has a domed top. The VS stands for Valve Stabiliser and this valve made for the RAF carried the Crown and A M.
The wide glass tube envelope is 47 mm in diameter and, excluding the B5 base pins, is 123 mm tall.
References: Datasheet & R J Sutherland.

 

Pin Connections
B5
1
2
3
4
5
a(4)
k
a(2)
a(3)
a(1)

 

Absolute Maximum Operating Conditions
Stabiliser
Va
mAa
420
55
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 28, 2017.
shape:wide.glass.tube construction:pinch type:voltage.stabiliser age:1930.1940 base:b5 pins:5 pin:1.a(4) pin:2.k pin:3.a(2) pin:4.a(3) pin:5.a(1)
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