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RE: grounding schemes ...

"I may have misinterpreted your comment, but each input should be properly grounded separately. If you really want it to be quiet, wherever a grid resistor is grounded, the cathode circuit of the same tube should be tied to the exact same spot and a single wire star grounding that to the power supply. Put another way, don't run separate wires for grid and cathode grounds."

Do you feel the need to separate low and high current returns for the audio circuit?

"On no account should any part of the audio circuit ground tie to chassis, since that is grounded into the wall by the power cord."

So the audio circuit returns should not reference chassis ground?

Are you connecting power supply returns to the chassis?

Or do you keep audio and power supply returns on a separate ground plane from earth ground?

Interesting topic here.



DT667



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