erik_squires said:
Yes, and the safety ground is connected to the chassis of the equipment it goes to. The screw/thread/ground connector next to the turntable input is connected to what, exactly? :-)
The screw/thread/ground connector next to the turntable input is connected to what, exactly? :-)
Technically? To the signal ground of the phono preamp. The signal ground is connected to chassis.
The fact that the preamp may also use the safety equipment ground, that is also connected to the chassis is irrelevant. The safety equipment ground is there in the event of a hot to chassis ground fault.
The whole audio system could consist of equipment that uses double insulated AC power wiring and doesn’t use the safety equipment ground at all. Including the TT, no equipment ground. Where is the earth connection now? Disconnect the TT ground wire from the ground terminal post on the phono preamp and a buzz will be heard through the speakers. Reconnect the ground wire, no buzz.
Jim