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QS70/20

 
    
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No actual data-sheet for the QS70/20 could be found but it clearly fits into the sequence of stabilisers. The QS70/20 data-sheet is probably a reasonable guide to the operating conditions of this gas filled valve but at five volts higher burning voltage.
The details are not visible - just the mica insulators.
The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 45 mm tall.
Reference: Data-sheet.

 

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

 

Absolute Maximum Operating Conditions
Stabiliser
Va
mAa
70
20
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 13, 2020.
shape:thin.glass.tube construction:all.glass type:voltage.stabiliser age:1950.1960 base:b7g pins:7 pin:1.k pin:2.k pin:3.k pin:4.pa pin:5.a pin:6.a pin:7.a
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