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Old 6th Jan 2013, 6:08 pm   #3
PJL
Dekatron
 
Join Date: Sep 2005
Location: Seaford, East Sussex, UK.
Posts: 5,997
Default Re: Pye Q.AC38 - rectifier valve

Rectifiers are pretty tough so this may not be the fault but you do need to replace before you go any further particularly with the energised speaker and resultant HT surge.

I always put a DMM on the HT when powering up for the first time as you can tell alot from the behaviour. On an energised speaker set it should rise well above the normal operating voltage and gradually fall as the output valve starts to draw current.
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