If you look on AA in the PS Power Forum, there's a discussion about the company now putting a heatsink in the P500 to address this issue. I'm sure they'll retrofit it for you.
PS Audio 500 questions
I received a PS Audio 500 today that I purchased on Audiogon. I plugged a tube preamp and a tube phono preamp into the TWave setup sockets and plugged my CD and Turntable into the ultimate outlet sockets on the back. The output voltage was first set to 117V and the to 115V. The power usage display runs about 50% as it should, but after a few minutes the display binks HOT and the regneration outlets shut down. Did I purchase a bad unit or is there something I don't understand?
Jeff
Jeff