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 [email protected] 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 > [email protected] > [email protected] > [email protected] > K3 #69 > K2/100 #4637 > K1 #2033 > KX1 #1023 > T1 > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
