Isolated Ground causes ground hum.

"I only connected it to the ground post on my Shindo Aurieges preamp. "

Isn't the purpose of that grounding lug as a place to ground your turntable or phono preamp?  I assume the chassis of the preamp is already grounded.

lak,

Thank you for the kind words.
Jim

I put my system back to normal. Thank you for talking me out of the dangerous isolated ground gentlemen.
Calvin