Lostbears:
Yes; the ground is isolated to the ground rod; which is located at the opposite side of the house where the main panel is located; over 100 feet away...none of the other sat receiver boxes in house have ground hum; when hooked up to other a/v receivers; only problem is my main rig; and only when the VAC pre amp is switched from 2 channel to cinema mode...which is why I am asking the forum readers for possible solutions...I am stumped...thanks for the thought..
Yes; the ground is isolated to the ground rod; which is located at the opposite side of the house where the main panel is located; over 100 feet away...none of the other sat receiver boxes in house have ground hum; when hooked up to other a/v receivers; only problem is my main rig; and only when the VAC pre amp is switched from 2 channel to cinema mode...which is why I am asking the forum readers for possible solutions...I am stumped...thanks for the thought..