Traded for an Egnater. Problem solved.
Thanks for the replies.

Thanks for the replies. I have not been able to locate a chasis issue. Did receive a tip on "the other forum" that it may be the tube socket itself. Unfortunately, that appears to be difficult to access when I had it apart. Someone else suggested that it may be a preamp tube, in spite of what my exp...

To add: Les Paul P-90's. Have made pickup height adjustments. In addition, every EQ setting possible. Including no bass.
Also offends equally on low wattage setting.

Hello. New to the forum. Searched extensively for answers concerning the noise issue. I apologize if I've missed something. I'm beginning to think it's the infamous rattle. My initial thoughts were that it was a tube. It's not!! I have a new Mark II, C5, three piece back, low wattage switch, version...