damping (BD-Design)
Hello Bert,
I am not an electronical expert but with the BD30 amps I use there is no
extra ground. The power supply of the BD30 amps is +35V, 0, -35V where the
"0" is the "ground" connected to the ground (-) of the tube amplifier
output.
This connection is exactly the one that was missing in my system. So I just made it and to my disappointment and surprise it makes the hum considerably louder.
Best wishes,
Eddie
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