If you have any sort of shortwave radio that picks up AM, walk around the
house and the neighborhood and see if any patterns emerge.  You can be
fooled, but this technique should work, especially as you go to higher and
higher frequencies.  Plasma TV's are hideous.  Some street lights buzz like
crazy when they can't decide whether to be on or off.  And although I think
it was an exception, my brother's iPhone charger was extremely loud across
the HF spectrum during a recent family visit to Iowa.  

I hope you succeed in finding this before it takes you off the air.
73,
Lloyd Rasmussen, W3IUU, Wheaton, Maryland
Home:  http://lras.home.sprynet.com
Work:  http://www.loc.gov/nls
 
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Buddy Brannan
> Sent: Tuesday, December 06, 2011 11:02 PM
> To: [log in to unmask]
> Subject: Terrible, hideous noise!
> 
> I get to have fun trying to track down some noise.
> 
> Seems that when it's on (a lot), it runs from 40 meters all the way =
> through to 17 meters. Good S9, takes out the whole band. I thought it =
> might be the new Roadrunner go fast sideband cable modem, but I =
> unplugged it with no change. Thought it might be the blower in our =
> furnace, but turned off the thermostat with no change either. Thought it =
> might be the ethernet over house wiring adapters, but I've had a couple =
> of them running since August, but the noise has only started with a =
> vengeance during the past few weeks. It was intermittent, but now pretty =
> constant, which makes me think it's something Winter or holiday related, =
> but absolutely no idea what yet. I'm not even sure it's being generated =
> at my house, could be something from a neighbor. That I hear it more =
> often in the evening lends some credence to this theory. Lovely buzzing =
> static. I'm somewhat inclined to blame the high speed Internet, but more =
> at the cable drop, maybe, and not the modem itself, as I started =
> noticing it when we got the sideband Internet service. Could be =
> coincidental though, as I don't hear it all the time. Anyway, it's very =
> annoying. Not expecting a lot of suggestions, mostly just bitching. LOL
> 
> --
> Buddy Brannan, KB5ELV - Erie, PA
> Phone: (814) 860-3194 or 888-75-BUDDY