Thread: ID this valve.
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Old 3rd Dec 2021, 4:26 pm   #8
Leon Crampin
Octode
 
Join Date: Nov 2005
Location: Surrey, UK.
Posts: 1,869
Default Re: ID this valve.

I have some very early MOV triodes (ML4 etc.) with the same type of base with the locating nub.

Given that this is an indirectly heated rectifier (so not a 5U4) I would suggest that it could be a very early specimen of the MOV type MU12 or MU14.

Leon.
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