Slava, I agree with Fred that this is noise from one of the many noise generating devices in our houses today. Square waves are generated by most every piece of electronics equipment in the house, and most consumer products make no attempt at containing them. We really haven't defended our spectrum from the local noise sources very well.
The spectrum is actually pretty quiet in your location compared to mine. After about 10 years away from ham radio in the 80's, I came back and was surprised how noisy the spectrum had become. The addition of panadapters visually confirms what we hear. For relief, I occasionally carry one of my homebrew DC receivers away from cell phones, computers, etc. just to listen to the beauty of RF signals on a clear cold night. It is like the difference between fine wine, and Ripple! Mark KE6BB From: Slava Baytalskiy<[email protected]> Sent: Wed, Apr 9, 2014 at 08:16 AM To: Elecraft List <[email protected]> Subject: Re: [Elecraft] Strange RFI question Hi everyone!Sorry about the video not showing up.Not sure why i didn't think of just uploading it to YouTube.So, here are two links:This one i took with my iPhone. The audio is very low though - http://youtu.be/DOZHHxjDhDIThis one is the original that i took with the screen recorder - http://youtu.be/Qhs1G9YS5k0Please take a peek and see if you could give me some ideas.As i've said earlier this is very pronounced on 20 meters. The signals in question are repeating every 61 kHz throughout the band. So its not just one signal. And they don't sound like you normal hum or buzz.Thanks in advance!Slava, W2RMSOn Apr 8, 2014, at 9:34 PM, Slava Baytalskiy <[email protected]> wrote:> Hello everyone!> I'm not sure if this is the correct forum for this sort of a question but i figured i'd give it a shot.> I've been going out of my mind with this strange signal pattern i've been seeing on my new panadapter connected to my new K3.> I first saw it on 20 meters. It seems to be the same signal pattern, spaced evenly, at 61 kHz intervals.> Something tells me that it could very well be outside of my shack. I've got the street power lines 15 feet in front of my house, with a big transformer on top of a pole.> I just took a video of the whole thing and you can also hear the sound of it, especially while i tune it up and down.> Here's a link to the video file in my DropBox: https://dl.dropboxusercontent.com/u/111549/rfi/strange_rfi.wmv> Sorry for the format. This screen capture program only does Windows Media Video.> > I've gone to a point where i've disconnected everything in the shack. Literally. And i could still hear it.> My Yaesu 857D also hears it, with the same antenna hooked up to it, so that tells me its not my K3 or the panadapter (for that matter).> I also tried hooking up another antenna (i have a home made fan dipole) and i can still hear it. So its not the antenna (right?).> > I'm very open to any suggestions as to what to do? How to narrow it down?> > Thanks a bunch in advance!> > Slava, W2RMS> > P.S. I almost wish i didn't have the panadapter, so i wouldn't even know its there... :-(______________________________________________________________Elecraft mailing listHome: http://mailman.qth.net/mailman/listinfo/elecraftHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:[email protected] list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.htmlMessage delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
