This 60 Hz hum is driving me crazy

Separating the wheat from the chaff in an advice column can be helpful. No offensive intended here. Working mostly with DC circuits and some AC circuits, I found out a lot of lies that sounded right but would lead you in the wrong direction. >>>>"Ground is ground the world around"<<<< was one of my favorites. Sounds catchy and true, but no, it isn’t.

I am sorry that the DC blocker didn’t work for you. Would have made things simpler. One thing that you mentioned was that there is Still Hum when using the amp on a different circuit in the house. That definitely points to the amp at this moment. Replacing the tubes may be a good idea, yet I would be inclined to start only with the rectifier tube if the amp uses one.

Try to isolate One Thing at a Time. That is what we did in my job, and though it might seem tedious, it won out in the end... most of the time. As others have said, it can be difficult to find a hum problem, but at least there are a few things that you can do on your own.

I look forward to following your progress.

@steakster I have too much going on to do that but instead, I plan to pack it up and take it into my office (which was built in the 60s) so I hope the electrical there has good grounds.

I knew it wouldn't work, but tried it anyway.  DC Block paired with the Hum Eliminator did not work.  Also notice that the Hum will increase a touch if I turn the volume up.  Is that a 120 Hz?  

Really confused now.  Talking to someone at UA, he thinks its a groundloop and new tubes won't help.  Spoke to a local dealer here and he thinks the tubes need to be changed.  

I am trying everything I can before taking her in to the doctor. 

UGH!!  Fresh set to tubes from McShane...perhaps a slight decrease in buzz, but it's still there.

Looking for Bay Area recommendations for stereo repair.  I don't know what else I can do.

FYI, Upscale Audio was completely useless and the customer service was quite half ass.  I do appreciate that they got back to me, but their replies were very "figure it out or Google it."  Which I did.

Hums, buzzes and all that. Been there done that. Ditched tubes, went all SS and never looked back. Liked the tube “sonics” but “noise” bugs the Shitake out of me. The issue is most likely your household. It literally could be a bad plug or light switch somewhere on the circuit. Another thing to look at is any LED bulbs on the circuit or dimmers. Notorious. 
 

Ooooh.  I have LEDs and dimmers.  But I took the unit to my condo complex's main lobby and plugged in there.  Got the buzz.but there are LEDs galore.  Maybe I need to take it to my office that was built in the 60s