I very oddly had an issue, more around 10 meters to 15, where I used to live 
where the number of things plugged in and turned on could move noise up and 
down the band. there wasn't any one thing that did it or anything but at 
night if I wanted to talk to a group I often talked to on 10 meters, I had 
to make sure all 3 air conditioners weren't turned on, after a while we 
moved down to the tech portion of the band, to a frequency I had to make 
sure either all 3 AC's were on, or a VCR was unplugged, there was something 
else too that I had to make sure was off. really though, I could turn things 
on and off all around the house and watch the noise go up and down the band, 
it was about every 20 KC's I'd hear it but I could move it little by little 
based on what I turned on and off, the higher powered devices moved it more 
than the lower powered devices. It was very strange. I don't dare get on 10 
meters in the apartment I'm in now, not to mention all I have up is a G5RV 
and they're horrible on 10, 12, and 15 meters, in my opinion. My old A99 
vertical was a lot better but I don't dare put one of them up here. I don't 
seem to run in to a situation like that here and honestly, I'm shocked with 
everything around me.
----- Original Message ----- 
From: "Howard Kaufman" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, November 08, 2010 10:53 AM
Subject: Re: 160 meter noise


> Bob, if you have a computer back-up power supply, try plugging the rig in 
> to
> that, pulling the main power, sending CW, and seeing if the problem 
> appears.
> Hopefully not, and that isolates it in your house.
> Then, turn on power a circuit at a time, see if you can replicate the
> problem.  I had something like that once, and it turned out to be the
> charger for one of those robotic vacuum cleaner things.  I don't know how
> generating RF effected the thing, but it cleaned up when I unplugged the
> thing and then hid it.
> Where is the robotic vacuum honey?  My dear I have no idea at all!  I am
> blind don't use it and never knew we had it.  When did you buy that and 
> not
> tell me about it?
> Oddly enough, just recycling the house power has eliminated lots of 
> problems
> that I was never able to find.