PP12 Weirdness

Power Components
1

My first hint of a problem? A loud hum in my system. After screwing around with various grounding schemes, I traced the buzz to the PP12 (ultimately plugged everything straight into the wall — buzz is gone)

So, with the PP12 on its own with a couple of non audio loads:

  • with no load, behaves normally (2.1% distortion in, .1% out)
  • with a 5% load, distortion out is about 7%

Scope:

image

Note the lowered output voltage.

I’ve talked to PS Audio three times — getting the run around. My PP12 is still under warranty.

??

2

Have you contacted @jamesh ?

3

In case you haven’t yet…power your P12 off with the switch
in the back…wait a few moments the power back up.

Doing this will cause the P12 to reboot it’s firmware…
Something similar happened to mine and rebooting fixed
the issue.

Best wishes

4

This looks like a dead P12 to me. If you send our service guys the picture above, they’ll get you an RMA. Not certain why you’re getting a run around, it’s clearly not working properly.

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5

I spoke thrice to Mark Simpson

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