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Old 13th Jul 2019, 5:28 pm   #125
PJL
Dekatron
 
Join Date: Sep 2005
Location: Seaford, East Sussex, UK.
Posts: 5,997
Default Re: Mullard 5-10 amplifier

I would put it back to the original 2.2M and wait to see what happens when you connect the pre-amp.

My guess is pickup of RF interference but checking the feedback sounds worthwhile.
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