I hope nobody minds that I revive my own thread.
I've been working on the problem on and off since my last report. To sum it up, I've found nothing. I've gone through the house and tried unplugging anything that might make noise and couldn't find the source. All I figured out is that most of the outlets in the house don't have ground. (That's 50's wiring for you...) However, I managed to try one that is grounded and it has the same noise.
I've given up on trying to track down the source of the noise and fixing it. I've turned to trying to filter it out. Do you think a power line conditioner would work? Something like this or similar:
http://www.apc.com/resource/include/...ase_sku=LE1200
I'm guessing that it won't because the UPS I have on my computer doesn't filter out the noise. But can someone point me to a device that would?
I'm about to start my senior project and I would be really nice if I could do some work at home.