does not change when the Rega is connected, the noise signal is the same, and the Rega Planar 1 does not have a ground wire, just the RCA connectors and power cable.I'm referring to the ground wire that has to go from your turntable to the Amp, not the mains power ground.
Right, left and ground should be coming out of your turntable.
I'm wondering what the noise will be when you've got the three wires between your turntable and your Amp connected.
It may be quieter with it all connected.