Power supply noise

[mattlee0037]

Hey guys, not too sure about this one so I bring it to smarter brains than I. So I put together my friends board with a Voodoo Labs Pedal Power 2+. On the board he has a bunch of pedals including a klone I built him and a donner reverb pedal. The first donner reverb he had would make this noise whenever it was on- a high pitched squealing noise underneath everything no matter what the knobs were set to. He contacted the dealer and got shipped another one which we thought was good except with this one a squeal becomes apparent when both it and the klone are on but only then. I'm not super sure why this is happening as they are on isolated power supplies. The noise almost sounded like the klon charge pump oscillating however knob turning has no real effect on it. I tried changing charge pump IC's but the new one made it worse. Anyone have any ideas? Is it the reverb again?