If the CATV turns out to be the problem, try a Rat Shack ground isolation transformer on the cable line, or as a temporary fix, two of the 75 -300 ohm transformers, installed back to back (CATV>>75 ohm>>300 oh>>75 ohm)
Ground Loop Hum
I own a McIntosh MC240. Recently I needed to have the original power cord replaced and figured why not replace it with a 3 prong grounded cord while I'm at it. Only problem was when I hooked it up to my pre amp [MFA Magus] I got hummmmm. I've been getting around it by using a 3 prong to 2 prong adapter on my pre amp. That stopped the hum, but I've always felt uneasy about not having the unit grounded.
My question is, is there a simple, cost effective way to get rid of ground loop hum while still keeping my amp & pre amp grounded?
If not, which unit is better off grounded, or does it make a difference?
Thanks in advance for any recommendations.
My question is, is there a simple, cost effective way to get rid of ground loop hum while still keeping my amp & pre amp grounded?
If not, which unit is better off grounded, or does it make a difference?
Thanks in advance for any recommendations.