After getting my new tube power amps, my P10 starts humming when they are powered.
At first, I thought it was 50Hz hum originating from the tube amp transformer, but then I discovered it was actually coming from the P10 itself. It is a mechanical buzz probably in the 50Hz region, but it sounds even, so I don’t think it is caused by superimposed DC on my main incomer. The noise also propagates to my speakers. I also experienced a P10 trip in one instance.
Any ideas or suggestions?