Ground Loop Hum - Partially Identified - Solution?

Looking at the specs it appears this should pass HD too!

It does indeed pass HD.

As for your amp ground loop problem, I assume your CJ amp has a captive power cord. If it doesn't, PSAudio power cords have a removable ground pin. I use them for my amps. Chasis ground for the power amp is accomplished through the interconnects to the preamp.

Bdgregory, Thanks for this comment. I am in fact looking for a us PS Audio power cable, Statement or something similar used on the Gon. No issues with you doing this in your system? Not sure why running through a cheater plug is a fire hazard, yet PS offers a removable ground pin. Know anything about that?

I don't think a cheater plug is a fire hazard, but it's kind of counter logical to obsess over power cords in this hobby and put one of those in between it and the outlet.

As far as OK? goes - I was told to lift the ground by the Designer/Mfg of my power amps (EKSC Eagle 4). I had called him about hum, and he said the amp should not be grounded - all grounding should be through the preamp. He said they wouldn't ground their amps except UL listing requires it. As long as the preamp is grounded, the interconnect ground from power to pre is safety enough.

In addition, I have B&K power amps and none of them are grounded. While they have a ground capable (ie 3 prong IEC connector) power cord, they do not internally connect the ground. I'm not sure how (or if) the deal with UL listing on their amps.

Based on this, my practice has been to use PS Audio cables on my power amps and remove the ground pin. I'm not sure if anyone else makes them.

Bdgregory - I was not aware of the B&K power amps not being grounded. I am running the B&K 507 S2 HT receiver to my amp (this is where my ground loop hum is established). I tested the cheater plug approach and it took care of the hum. As you indicate, I have since purchased a couple of PS Xstream Statement power cords and removed the pins for the Conrad Johnson amp, with the same elimination of the hum that the cheater plug delivered.

Your statement though about the B&K amps now concerns me a bit as I was assuming I was grounded through my B&K.

Sorry Ckoffend - I hope I didn't raise too much confusion for you. My comment about B&K amps applies to their POWER amps, not receivers or preamps. I should also say that my statement is based on my experience opening up several B&K amps I've owned - the newest of which was a 2003 vintage. Based on how they are wired I assumed this is simply a B&K practice for power amps. The preamps I've owned have indeed been grounded. I've never owned a B&K Receiver, but based on your experience I would conclude your 507 is grounded - else the cheater plug would have no effect.