Here is a NaP3 view of the noise that's bothering me. I've narrowed it down to a group of houses about a mile away. The noise is on 24/7 so that eliminates a lot of things. Could it be a home alarm system? 73, Roger -- Remember the Liberty (AGTR-5) http://www.usslibertyveterans.org/ http://www.gtr5.com/