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Fender amp tremolo problem

So the amp "thumps" when the RCA shorting jack is in? But, doesn't if you remove this plug?

The Vibrato/Tremolo in the Bandmaster, the anode voltage seems to come from point "B." The only filtering prior to this point is the choke (which is prolly ok) and the first filter stage (series 70mfd caps).

Did you change the leveling 220k-ohm resistors, in this first stage? May have some imbalance between those two caps. Not enough filtering for the VIBRATO portion?

I like using 220k-ohm 2-watt metal oxide or 5-watt wire-wound Mills.


Edits: 11/29/16 12/01/16
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