• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Please Critique My Grounding Scheme

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Hello,
Please ignore the "Reg -" on the HV Shunt Reg" as it was a mistake

Is this a sound grounding scheme?

An externally hosted image should be here but it was not working when we last tested it.


The amp is a two-box type(one PSU and the other one shown here). IEC Earth and 0V are floating and taken here from the PSU chassis. The two chassis are link via umbilical chord where pairs are shielded (IEC Earth and Chassis connection, B+ and 0V, Heater 1+/-, Heater 2 +/-) individually.

Can I move point A to a point in between the two regulators(close to the volume attenuator instead?

Thank you for all the inputs!

Abe


*CORRECTION: The input signal from RCA (R1+ and Ln+ up to Rn to Ln+) should go to the selector.

Thanks!
 
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there are a lot of antenna's in there. couple of things to consider. move the volume pot to the rear (use a long stem pot like the long stem selector) and to the right and flip the positions of the tubes and output transformers. this would eliminate about 50 inches of wire which would be acting like antenna's picking up noise.
 
there are a lot of antenna's in there. couple of things to consider. move the volume pot to the rear (use a long stem pot like the long stem selector) and to the right and flip the positions of the tubes and output transformers. this would eliminate about 50 inches of wire which would be acting like antenna's picking up noise.

Thanks! This is the only layout I have and the volume attenuator cannot be located/move to the rear. This circuit is contained in a 17"x13" x3" chassis.

Abe
 
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