[Elecraft] OT Local QRN what is it?

[William Ravenel]

Bill,

I'm afraid it's not unique to your neighborhood. I've heard the same noise at my station in NC. It doesn't match the treadmill example referred to (at least at my QTH) because the roughly 3 KHz 'beat frequency' doesn't vary. When it's there it is audible from about the 17m ham band continuously down through  the 160m band. Like you I also hear it during the day but mostly on weekends since I work during the week. I'd love to know what it is because when it's present I may as well quit operating.

Will Ravenel, AI4VE
ai4ve at arrl.net

On Jan 16, 2010, at 2:34 PM, Bill Hammond wrote:

> I have been chasing this noise in my urban neighborhood for several years now.  It usually visits during the daylight hours and stays for several hours. It has a rhythm and is across all frequencies and bands.  I have pulled the big switch in my house and the noise is still with me (listening on battery powered rigs).  Neighbors on all sides of my city sized lot  have swimming pools and my first suspicion is noise generated by circulation pumps. 
> 
> Here are two  recordings (on a K3 of coarse).  Why not ask the most discriminating radio fans in the world their opinions on the source? 
> 
> http://www.flickr.com/photos/ak5x/4279625626/in/photostream/
> 
> 
> http://www.flickr.com/photos/ak5x/4279577818/in/photostream/
> 
> 
> Bill Hammond-AK5X
> wham727 at aol.com
> ak5x at mac.com
> ak5x at sbcglobal.net
> K3 #69
> K2/100 #4637
> K1 #2033
> KX1 #1023
> T1
> 
> 
> 
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