hey all, oh yeah fluorescent light is a major noise cause, didn't even think of that cause my fish tank is incandescent. also dimmers and ceiling fan controls are also bad noise problems. thanks Lady Fitzgerald. I am proof that the obvious is always overlooked. I am old, can I use that as an excuse. I guess just about any electrical device can create noise as in my house we have all kinds of useless crap plugged into outlets. never really thought about it until there is nowhere left to plug in something else.