Yes, screened, screen connected at both the PCB and phono socket. The phono socket is floating WRT chassis ground.Do you still use screened wire, screen connected to ground at the pcb end but to nothing at the phono socket?
Again, screen connected at both ends, phono floating.Actual ground point is grounding post? One 100R per phono socket? Screened wire, screen only connected at one end?
Its to meet USA ground current tests regs and the CE (at a lower current) equiv. And its also nice and low resistance.That's a fat piece of wire!
No the power supplies float and are connected to the ground plane. Directly in the case of the HT supply and via a potential divider and caps in the case of the heater supply. The whole thing is inside the earthed metal casework.Isn't ground also connected via the HT PS?
It may be you have more ground connections that are ideal. I reference to ground at the output, as that's the point where another grounded device will connect and where the reference to the signal to ground will be "measured" by the following amplifier/preamp.