@wsrrsw i haven’t yet but I’m about to. 

high end not “audiophile” outlets. 
 

Just tried again tripping every panel and breaker except for the amp’s outlets. Comcast line disconnected outside the home BEFORE the ground block (this nothing from Comcast is connected to the house). Nothing else plugged in and no interconnects plugged in. Noise remains. Connected to my Aerial speakers, noise present. Tried both amps, problem on both 

Has to be an issue with my wiring, the power coming into the house, the ATS, whole house surge suppressor or got lucky and have two separate amps with the same malady(and what are the odds of that?)

only other thing left is the cellphone of the alarm system which has a ups. It is located 20/30’ from amps. I wonder. 

@blackbag20  who knows we already have “Our Lady of Blessed Acceleration”! 

Need to read Fremmer’s article about his power issues:

Not saying this is your issue but>>>>>

Major From the Roof Down Electricity Upgrade Produced Incredible Sonic Benefits! | Analog Planet

@dpop Once the noise starts you can't bias them as the voltage cycles.  Having said that, they are right at 298-303 on all tubes (after many tries before the noise starts).

@jerryg123 Thanks, I read the article and the discussion about it here, on AK and other sites.  It was highlighted on a post before.  He describes a change in sound but not the noise I have present.  His solution was to add Powerplants.  I am hoping to address the issue before that kind of investment.

@ervikingo 

Sorry for the (late night made on cell phone) typos and now repeating myself but please try extension cord(s) to another circut and report back. 
 

“When angry, count four. When very angry, swear” Mark Twain