Question about grounding

[kagliostro]

I'm thinking to a stereo guitar amp that uses two separated circuits and only one PS

I searched about how to arrange the ground sistem and what I think may be useful is to have the input jack insulated from ground and to connect the ground of the two circuits to the chassis via a pair of ground lift circuits

But if I do that I don't know how to arrange the connection of the PS negative

Will it be useful to use a pair of ground lifter also to connect the negative of the PS to the negative of each circuit ? (Before of the ground lifter that connects each circuit to the chassis)

Does someone is expert in Stereo amp (HiFi I suppose) and can help me ?

THANKS

Franco

[kagliostro]

I've been thinking about the grounding scheme, and this is what I ended up with:



The PS ground and the circuit ground are connected to the chassis through a ground lift.

PS will be something like this



I was inspired by this:




Do you think it will be useful ?

THANKS

Franco

[shooter]

looks good from here, i built a SS stereo using this as a guide, didn't bother with the start-step circuit, mainly the filtering to the "right" of the PT
can't find the files, IIRC the circuit was silent as far as noise/hum goes

[passaloutre]

I think you’re overthinking it.

All the tube stereos I’ve worked on have a shared ground between the channels.

The stereo Vibrolux I made last year has just one ground. No lift necessary.

[kagliostro]

I've no practice on stereo and so I was looking to what HiFi guys do

That thing seemed feasible to me also because I remember well that in the VOX AC30CC2 there is a Ground Lift like that Merlin suggests and the some in other recent AC15 models

Franco