I’ve just taken possession of Crimson Donkey’s plinth and arm set up to demo.
Lots of hum.
I noticed the earth cables he had were:
from the arm to the phono stage
a loop of wire that was doing nothing at all (ring that was earthed for no reason).
Looking at the SME manual this second wire should be two wires that are connected to the RCA at the phono stage end and then earthed together as a second connection.
My problem… how do I connect an earth to the metal rca? Is it just wire to the wire outer? Or do I have to undo the plugs and factor the earth in intenally?