I get this type of noise when my wife uses a laminator. I also get a lot of sporadic noise in the morning around the time people get up which I assume are hair driers and curling irons. It really could be anything, but probably something one of your neighbors has. Good luck finding it, if it continues. 73- Tom - wa4ta
> From: [email protected] > Date: Wed, 19 Feb 2014 10:15:42 -0800 > To: [email protected] > Subject: [Elecraft] Noise, RFI ? > > Using my K3 I was trying to pick up a ZL2 station (New Zealand) around 18.08 > MHz this morning (about 9:50 AM PST) when this huge noise blanketed > everything out. It was about 30/9 and absolutely solid across the spectrum > shown on the P3. Using my KPA500, I switched to the 20 meter band -- same > noise, same level, same broadband impact. > > I determined that the noise was from roughly 1400 KHz all the way up to 28.05 > MHz. All about 30/9. About the time that I finished checking this full > MF/HF spectrum of noise it switched off. > > Then, it switched on, and stayed on for about 5 seconds, then off again. I > turned on my Icom R75. The next time the noise came on I checked it with the > R75 and the same noise, same 30/9 level, same broad across the bands. > > Obviously man-made or under man control as it switched on and off and was on > for various periods of time. This noise seems to be close, like generated in > the neighborhood someplace. > > Anyone have ideas of the cause. You noise experts (Jim?) should have ideas. > I was thinking maybe an arc welding machine but that is just a wild guess. > It sure seems to be something that can be switched on and off. It is not > periodic in that the on/off switching is at varying intervals. The longest > on period is about one minute, the shortest on period about 2 seconds. And, > it has been quiet for the last 10 minutes or so. > > Thanks for your help. > > 73, phil, K7PEH > ______________________________________________________________ > 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
