| Re: Made system changes, now have ground loop hum?
It usually does, but it’s not the best approach. And it didn’t really fix the problem.
I’m betting that it is still the cable box, or in the cable line. If the noise goes away when you unplug the coax from the wall, that’s your indicator. May sure your CATV service is grounded to the same ground stake that the service panel is. Even if it is, we’ve had people find that the connection had corroded, adding resistance, and hence a hum. When they disconnected everything and cleaned up all the connections, restoring good copper-to-copper connectivity, they problem went away.
Regards,
Wayne
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