John, when you say proximity tester, is that the thing that you can just touch to the outside of the wire and see if it is live?

I have my electricity guy coming in later this week for something else and I am going to have him look at every circuit upstairs. He rewired my basement to add circuits for the woodworking shop and kicked me up to 200 amp svc because I was also adding an electric range. Before his visit, if I ran the shop vac to catch the sawdust when running the table saw I would blow a breaker. He added 6 outlets in the basement, each on their own 20 amp breaker. Need him to nose around upstairs now. The hum was cut 85% by moving it to the other circuit. Of course I would like dead silence. Much like the audience wants when I sing....