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Weird Thing after I lift my ground.

I've finished lifting grounds on my system by buying 3 cheater plugs for my A/V pream, CD-Transport, and DAC. During the process of lifting grounds I switched everything off and unplugged everything from outlet. After that I plugged everything in the same place except those three units that I plugged them through cheater plugs. Now I see the weird thing. Whenever I stop CD-Transport or switch it into the standby mode, the "signal lock" LED of my DAC always blinking like it's trying to lock the signal. If anyone has experience this kind of situation or can explain this situation, I'm really appreciate.
supakit
lmathias
8 posts
 
I had some of the same problems, mostly amp hum that would not go away even with power conditioning, so I ran a dedicated 10 awg 30 amp circuit with isolated ground to a
8 foot rod in the ground. Now all hum is gone and I don't even seem to need power conditioning.
jaykapur
70 posts
 
Ground loop hum is much more easily solved by disconnecting the ground sheild of any cable TV line, and by having all your components plugged into the same outlet (thus on the same ground). Lifting the ground on all your hardware is a recipe for disaster.
jeffcantor
8 posts
 
If a cable tv input is part of your system, then the ground loop is usually caused by the ground of the cable system being at a different potential than the electrical ground (see page 115 of the current issue of Stereophile [June?]).
Remove the cable connection at the input. If the hum disappears, then go buy the MAGIC box or MAGIC Splitter.
(No, I do not work for MONDIAL, but I have spoken to Paul Rosenberg, who told me the above. And yes, my hum also was caused by the same thing. And it disappeared when I disconnected the cable connection.
jeffcantor
8 posts
 
Follow-up to what I wrote previously:

This past weekend I bought and installed the MAGIC Box and the aforementioned hum disappeared. So the MAGIC works in my particular installation.
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