Input jack grounding

[GainFreak]

I've seen PCB amps where the ground of all filter caps, bias supply and relays supply was in fact one big common square PCB track on the PSU board from which cables are running to the preamp and power tubes section. It was grounded to the chassis at that side of the circuit and the input jack had only a 100n cap from preamp ground to chassis. Although a high gain it was dead quiet. It looks like this arrangement works as well. I guess that big piece of PCB copper can be considered a star ground

[J M Fahey]

I have yet to see a "classic" star grounding in a commercial amp.

Does Fender count ?

Fender Super 60, origin of what later became hugely successful HRD series and its derivatives.

I count 8 ground tracks converging on a coin sized piece of PCB, some coming from vary far away, some barely 1 inch away, yet all deserved their own personal track.



There's many others, different brands, but this is the first one which came to mind.

[GainFreak]

Does Fender count ?

Well, now I've seen at least one.