Lord, suddenly I feel like some of people who say they get completely lost when I get into my theory explainations. -LOL- :) I know alot people might think a Noise Gate would get rid of such AC noise, which is sometimes true. But noisegates on a guitar is a bad choice especially live cause you may set the noisegate to knock out the noise but when you play something soft, it chops out some of the guitar signal. Bad!!! Power-conditioners are good since they just focus on the noise, no cutting at a certain db level.