Rerurn to Romy the Cat's Site

drdna wrote:

What was more concerning is today some 60 Hz hum also re-emerged in the system, sounding like a vibrating cell phone going off in the back of the room. It was interesting how it was sort of localizable, but the hum is annoying. As everything is plugged into the PP2000, I am not sure how to deal with it.

I am a bit concern with word “re-emerged” in your comment.  Are you saying that your playback did not have the hum with PP2000 initially in place and then as the PP2000 was burning the hum re-appeared.  Are you sure that you did not change the connections and the layout of the loads the coursed the hum?

I see highly unlikely that PP2000 is the reason of hum. The only thing that I would advise to check with PP2000 is that it shell not run DC in out that will course not only hum via speakers but also mechanical buzz in your magnetics. The Pure Power for only god know reason did not put in their units a very simplistic automated DC offsetting circuit, so you need to do it manually if you have DC running out of the unit, thanks God Pure Power offers a manual adjustment for it.

Regardless the rest I think you have a normal ground loop somewhere and it might be cured by normal PP2000-independat ways. The PP2000 own power cord must be plugged into 3 pin power receptacle and the ground terminal of the PP2000 into cable much not be lifted. However, feel free to lift the outputs of the PP2000 as much as you wish as long it benefits your specific need. I would advise to do I did what I was playing with PP2000. Plug all system in a big power strip/s and then plug the strip into whatever comes to your head: the wall, instillation transformers, PowerPlants, Sola transformers, AC SS stabilizers, resonating stabilizers… you name it. In this situation you can easy to use just one cheating plug to lift ground on the whole system and to see how it affects the things.

One more tip. I was fighting with this year back and it took for me for a while to figure it out. If you use any DWA to play files of computer and employ KVM switch to run one monitor/mouth/keyboard for multiple machines then be advised that KVM switch is a pack from playback’s “clean” ground to the ground where you PS connected to the utility lines. I was forced to lift the ground on all my 4 PCs that not in audio system at all in order get rid any hum

jessie.dazzle wrote:

(Romy, it would be great if we could edit our posts).

Jessie, the forums are configured that each poster might edit own post within 2 hours after the posting, do you see the “edit” button

Rerurn to Romy the Cat's Site