[Elecraft] OT Local QRN what is it? UPDATE!

[Bill Hammond]

Thank you Elecraft reflector members for all of the great suggestions on this QRN problem..  With your help I was able to locate the problem.   I would of not found it without your help.

Now, I have no idea what to do about the issue, perhaps nothing.  I now know the source.

It's my neighbors treadmill.  We share a power transformer (underground utilities).  Although I bet the noise is from a motor arching and most likely is radiating at the motor as opposed to being carried on the power line.  I have hope as he is not a ultra marathon runner and his runs rarely cause a QRT of over an hour.  

If you want to hear the sound click on the Flickr link: 
http://www.flickr.com/photos/ak5x/4279625626/in/photostream/
http://www.flickr.com/photos/ak5x/4279577818/in/photostream/

Thank you again list members for allowing me to tap the collective :)
73,
Bill
AK5X


On Jan 16, 2010, at 1:34 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
> 
> 
> 
> 

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