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0G3 VR Tube

The 0G3  (European: 85A2) (P/N 154-0291-00) is an 85 V voltage reference tube with a miniature B7G 7-pin base. It is very similar to the 5651.

Note: The designation is 0G3, the leading zero indicating a tube without a heater, although this is often mis-printed as OG3.

It is used in the 132, 547 and 506, among others.

Aged/Checked/Matched Pair Details
Used in Tek Part# S/N Range
Z 157-0064-00 All
661 157-0067-00 All


Tube aging procedure / Selection and checking procedure