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1. [RFI] Noise centered around 20 meters (score: 1): Author: Gary <gary_mayfield@hotmail.com>; Date: Sat, 23 May 2020 13:45:43 +0000; Hey folks, I don't work a lot of 20 meters, but was thinking I might use it during Field Day for a 1E operation. I have some 'noise' that starts around 11 MHz and gets stronger as I tune up the band.; /archives//html/RFI/2020-05/msg00072.html (7,219 bytes)
2. Re: [RFI] Noise centered around 20 meters (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Sat, 23 May 2020 07:18:07 -0700; Hi, See: https://www.nk7z.net/i-have-rfi-now-what-locating-it/ That will get you started... It is a single part of a three part series on dealing with RFI. 73, and thanks, Dave (NK7Z) https://www.nk7; /archives//html/RFI/2020-05/msg00074.html (8,198 bytes)
3. Re: [RFI] Noise centered around 20 meters (score: 1): Author: "Michael Martin, RFI Services" <mike@rfiservices.com>; Date: Sat, 23 May 2020 10:58:48 -0400; Hey Gary I'd love to see that video without you talkin. it's important to hear what the noise sounds like more so than the signal level. the noise you have that I heard at the end of your speech is n; /archives//html/RFI/2020-05/msg00075.html (9,297 bytes)
4. Re: [RFI] Noise centered around 20 meters (score: 1): Author: Gary <gary_mayfield@hotmail.com>; Date: Sat, 23 May 2020 16:50:32 +0000; I was asked to do a video of the noise with no talking. You can see it here: https://youtu.be/I_AeXh5IGYg The noise sounds the same across the band where I can hear it 11 - 15.6 MHz. It is the strong; /archives//html/RFI/2020-05/msg00076.html (8,607 bytes)
5. Re: [RFI] Noise centered around 20 meters (score: 1): Author: WW3S <ww3s@zoominternet.net>; Date: Sat, 23 May 2020 12:57:22 -0400; What type of internet service do you have, DSL? Does your modem have battery backup? I chased my tail with my cable modem, it has battery backup since I also have voip from them as well....switching; /archives//html/RFI/2020-05/msg00077.html (9,734 bytes)
6. Re: [RFI] Noise centered around 20 meters (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sat, 23 May 2020 11:20:42 -0700; I'd like to see a waterfall. Study http://k9yc.com/KillingReceiveNoise.pdf 73, Jim K9YC _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com; /archives//html/RFI/2020-05/msg00078.html (7,929 bytes)
7. Re: [RFI] Noise centered around 20 meters (score: 1): Author: Gary <gary_mayfield@hotmail.com>; Date: Sat, 23 May 2020 22:17:54 +0000; I was able to borrow a portable shortwave radio today, and we clearly determined the noise is from about a block over. I will build a loop for the radio tonight and take another whack at it tomorrow.; /archives//html/RFI/2020-05/msg00079.html (11,440 bytes)
8. Re: [RFI] Noise centered around 20 meters (score: 1): Author: Thomas Mills <tsmills@bellsouth.net>; Date: Sat, 23 May 2020 18:21:45 -0400; Could this be coming from solar panels? Sent from my iPhone _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi; /archives//html/RFI/2020-05/msg00080.html (12,219 bytes)
9. Re: [RFI] Noise centered around 20 meters (score: 1): Author: AA5CT via RFI <rfi@contesting.com>; Date: Sat, 23 May 2020 22:35:06 +0000 (UTC); Gary, How long has the noise been affecting you? A week, several weeks, or a month? My noise source on 160 and 80 meters originating from a residence with buried utilities in the alley ceased a month; /archives//html/RFI/2020-05/msg00081.html (12,782 bytes)
10. Re: [RFI] Noise centered around 20 meters (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Sat, 23 May 2020 23:37:02 +0000; Even without social distancing, that can be a challenge at best. The neighbor probably bought some device or another that is making noise. Let's assume he bought a whole basement worth of commercial; /archives//html/RFI/2020-05/msg00085.html (16,112 bytes)
11. Re: [RFI] Noise centered around 20 meters (score: 1): Author: Gary <gary_mayfield@hotmail.com>; Date: Sun, 24 May 2020 00:03:18 +0000; Its probably been there since I bought this place. Im just now getting a radio set up. I dont think I will cold call anyone until the virus pandemic has settled down. Im still hoping that we will fer; /archives//html/RFI/2020-05/msg00087.html (15,212 bytes)
12. Re: [RFI] Noise centered around 20 meters (score: 1): Author: Gary <gary_mayfield@hotmail.com>; Date: Sun, 24 May 2020 00:05:43 +0000; Thanks Ed! Even without social distancing, that can be a challenge at best. The neighbor probably bought some device or another that is making noise. Let's assume he bought a whole basement worth of; /archives//html/RFI/2020-05/msg00089.html (18,904 bytes)
13. Re: [RFI] Noise centered around 20 meters (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sat, 23 May 2020 17:17:10 -0700; Have you studied Dave's material and mine? Two things we both recommend are 1) buy or borrow an inexpensive SDR and install one of the many freeware programs that lets your computer control it. 2) Se; /archives//html/RFI/2020-05/msg00090.html (10,094 bytes)
14. Re: [RFI] Noise centered around 20 meters (score: 1): Author: ROLAN CLARK <rolan.clark@comcast.net>; Date: Sat, 23 May 2020 20:35:52 -0400 (EDT); Gary and all, Curious, have you tried google earth to look at the location where the noise may be coming from. If solar panels are there they may have been there when the google earch picture was tak; /archives//html/RFI/2020-05/msg00091.html (10,462 bytes)
15. Re: [RFI] Noise centered around 20 meters (score: 1): Author: Gary <gary_mayfield@hotmail.com>; Date: Sun, 24 May 2020 00:38:28 +0000; Jim, I have read your materials -- and have used lots of type 31 material around here choking the common mode. I hadn't really checked 20 meters, until it soaked into my thick skull I may wind up doi; /archives//html/RFI/2020-05/msg00092.html (11,007 bytes)
16. Re: [RFI] Noise centered around 20 meters (score: 1): Author: Gary <gary_mayfield@hotmail.com>; Date: Sun, 24 May 2020 00:47:13 +0000; Thanks Rolan, No solar panels around here and the noise is still there at 3:00 AM. We were able to track the noise to an area the size of a block or so with a portable shortwave receiver based on sig; /archives//html/RFI/2020-05/msg00093.html (10,672 bytes)
17. Re: [RFI] Noise centered around 20 meters (score: 1): Author: K9MA <k9ma@sdellington.us>; Date: Sat, 23 May 2020 21:31:24 -0500; I was very lucky a couple weeks ago when I was trying to track down some line noise. At one point, all indications were it was coming from a particular house. A walked all over the place with a VHF y; /archives//html/RFI/2020-05/msg00099.html (17,978 bytes)
18. Re: [RFI] Noise centered around 20 meters (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sat, 23 May 2020 19:54:45 -0700; So now I'm back to doing battle with the power company. Scott, Have you done what Dave and I have both suggested and looked at it on the waterfall of a good receiver? My troubleshooting guide shows h; /archives//html/RFI/2020-05/msg00100.html (10,070 bytes)
19. Re: [RFI] Noise centered around 20 meters (score: 1): Author: K9MA <k9ma@sdellington.us>; Date: Sat, 23 May 2020 22:58:55 -0500; That was the other baffling thing about this case: it had all the characteristics of power line noise, yet it appeared to be coming from a house. The spectrum was very broad and flat, unlike switchin; /archives//html/RFI/2020-05/msg00101.html (12,724 bytes)
20. Re: [RFI] Noise centered around 20 meters (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Sat, 23 May 2020 21:26:55 -0700; AF is not a great place to look -- virtually all RFI generated by electronics controlling AC power will show harmonics of 60 Hz. Nearly all RFI generated by the Power System itself will be impulse no; /archives//html/RFI/2020-05/msg00102.html (13,036 bytes)

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