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In the Forum: Audio Discussions
In the Thread: It’s mad, mad, mad... electricity.

Post Subject: Pp2000Posted by Bill on: 3/22/2010

I would place my bet on common mode noise being carried on the safety ground long before blaming RF
The ground on the amp has been tried both lifted and present. I have reversed the AC cord using a cheater plug without effect. I have tried grounding the chassis of the amp directly to it preamp, its active crossover and the pp2000 to no effect. I have even disconnected the amp from its sources and connected it only to the speakers, and have used several different AC cords for the amp. \On the other hand the only 20 amp cord I had is a long 10 foot run of standard 12 gauge electrical cable so that may be the problem. Will try to get a decent cord for the pp2000 to see if that helps.

The only thing that helps is moving the pp 2000 chassis away from the amp or turning off the external power switch on the back and running on batteries. Thus the feeling that its RF but I could be wrong. Will have to see what happens when I get my two units. Interestingly its only this one amp but it is the closest to the pp2000 chassis.

Bill

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