Would a power conditioner stop a 60 cycle hum ?

Garebear,

I assume all your audio equipment is plugged into one duplex receptacle or maybe 2 duplex receptacles but both are fed from the same branch circuit breaker. Correct?

Do you have a CATV box receiver connected to the audio system? If yes that is more than likely the problem. A difference of potential, voltage, exists between the CATV Cable Company’s coax shield and the safety equipment ground of the 120V AC power system feeding your audio equipment.

If you do have a CATV receiver hooked up to your audio system try disconnecting the Cable Company's Coax cable from the receiver and see if that stops the ground loop hum.

If it does buy one of these. A Cable TV isolator.
.

Get a Hum X from Ebtech.

Get a Hum X from Ebtech. My conditioner (APC H15) did not eliminate the hum caused by my RT707 reel to reel. I finally had to put a cheater plug on the APC H15 to eliminate the hum. I am awaiting delivery of my Hum X.

...thanks everyone but what the hell is a Hum X from Ebtech. The system is on a seperate circuit that my cable TV, I worked with an electrician who moved the ground wire of the cable to a difeerent part of the circuit box......did not work.

You need to provide more detail, and answers to some of the questions that have been asked, before meaningful help can be provided:

1)What are the components in the system?

2)How many duplex outlets are being used, and which components are being plugged into each of them?

3)If multiple duplex outlets are being used, which of them are on the same leg and which are on opposite legs?

4)Re "the system is on a seperate circuit that my cable TV," are there any SIGNAL connections between the TV or cable box, or any other component that may be connected to them, and the audio system?

5)Have you tried Gbart's suggestion of starting "with you amp alone hooked up to your speakers and connect your other components one at a time to see which is causing a ground loop"?

6)Have you tried temporarily putting cheater plugs (3-prong to 2-prong adapters) on the power plugs of various components, to determine where the ground loop is occurring?

7)Is there a basis for confidence that the problem is being caused by a ground loop, rather than the hum being generated internally within some component?

Re your initial question:

Would a power conditioner stop a 60 cycle hum ?

In general, I definitely would not count on it. However, if the components in the system are presently being powered off of multiple branches or multiple legs, putting them on a single duplex outlet might very conceivably resolve the problem, whether it's through a conditioner or not. You could determine that inexpensively using a simple power strip that provides no filtering or surge suppression, and extension cords if necessary.

Regards,
-- Al