First, thank you to everyone in the community who has been so helpful, as I learn about this hobby.
Now the issue: I purchased a Variac, because my AC power bounces between 119-124 V. This prematurely ruined one GL power tube. I was advised to get a Variac. I was told this one would be fine and purchased it https://www.circuitspecialists.com/variac-variable-ac-ps05kva.html
I have been swapping out lots of things and have not been totally happy with the sound. It was just missing a richness and bass punch. Tonight, I plugged the amp directly into the wall and that got me back what I lost. That is the sound I want. BUT I don’t want to prematurely blow out my amp or $40 power tubes at 200 hours.
Any advice on how to have the sound quality AND not blow things up with my fluctuating high line current?