Tourmaster 4100 power grid issues

psycle_1

New member
I have a Tourmaster 4100 that I'm working on for a client. The different power grid settings have no affect on power output or perceived volume. I have checked the relays for both B+ as well as power tube bias and all are working. B+ voltage changes accordingly as well as bias current when switched to the different power levels. What am I missing here?

Thanks!
 
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