GZ37 Mullard GZ37 white print made in Great Britain same code on glass IS1 B2A pair tested 100%
Mullard GZ37 with same code on glass £ 250 pair
Description
The GZ37 aka 53KU is an indirectly heated full wave rectifier and together with the U52 the 53KU and GZ37 are the most sought after valves here at AM.
Pair of Mullard GZ37 MINT New Old Stock white letters on glass.
Brown base.
A well engineered valve that lasts longer than any other counterpart, delivering excellent rectification.
Clean top and in great shape.
Both Mullard GZ37 have the same code on glass IS1 B2A
Tested with AVO VCM 163 with A1=A2 100% emission
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