[RFI] Very nasty noise

WX5L wx5l at charter.net
Mon Mar 19 09:43:49 EST 2007

The site you are looking for was previously 

but now has been moved to www.arrl.org/tis/info/HTML/RFI-NOISE/
It truly is a wealth of RFI info with audio clips all all typres of RFI 


----- Original Message ----- 
From: "Joe Stepansky" <kq3f at comcast.net>
To: <rfi at contesting.com>
Sent: Sunday, March 18, 2007 5:01 PM
Subject: [RFI] Very nasty noise

> Just yesterday (March 17) a new and very nasty noise appeared on my
> radio.  It covers all bands from AM broadcast to 10 meters (and maybe
> beyond).  S9+40 in the AM setting, wiping out any hope of hearing 
> anything,
> anywhere.  The interesting thing is that it's pretty steady on the HF 
> bands
> no matter where I turn my beam EXCEPT heading 255, which has a pronounced
> null.  I'm trying to determine the significance of that.
> I made a 30 second recording.  Where can I upload this thing to see if
> anybody recognizes it as anything?  The noise has not been 24/7.  Earlier
> this afternoon I'd hear, on 20 meter CW (though it would occur 
> everywhere),
> what sounded like a pop.  The scope on my 756PROII would then show a 
> single
> spike.  I'd then hear what sounds like weak crackling, followed by another
> spike (sounds like a pop) in a different location on the scope.  Cracking
> would stop.  Within a second the weak crackling would start again, another
> spike, cracking stops.
> I drove around and heard the same noise on the road near my house (100
> yards away), but couldn't pinpoint it.  I haven't shut off the breakers in
> the house yet, though I realize that's something I should do.
> Anyway, I forgot the location to upload the wav file, so I'd appreciate
> info on that.  Thanks!
> 73, Joe KQ3F
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