The B+ caps are the 2 longer black caps on the power supply board along with the 3 blue sprague atoms.Those Spragues look new so you probably only need to change the black ones.They should be 220uf's.uberdave said:Which one are
the B+caps? And really appreciate the feedback from both the board and Mesa customer service.
I didn't know they were F&T's.I thought they were old caps and only the 30uf's had been replaced.That's good you only need the one cap then.uberdave said:Actually when we pulled the chassis we discovered that one of B+ caps wiring had broken off.
Which would explain the amp cutting sound. Ordered a new F&T 220uF 300v cap.
Hopefully that and installing a new AC pwr cord fixes the issues. Thanks again!
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