Answers:
What are you running as far as gear? Odyssey Kismet stereo amp, Candela preamp, Suspiro phono
Are you running a voltage maintainer, cleaner? AudioQuest Niagara 3000
Are you running digital and analogue? Analogue
Are you running your modems and digital stuff on the same circuit, as your analogue stuff? NO
Does the noise vary, go up and down with the volume? YES
Does it change (yo yo) when you move cables? NO
You said "Hair dryer", maybe you need to look at that circuit also. The hair dryer, and where it's plugged in. Fix the outlet, and the dryer, do those things come with a ground on the plug? YES-grounded