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21. [RFI] Grow Lights (score: 1): Author: "Karin Johnson" <karinann@tampabay.rr.com>; Date: Tue, 7 Jan 2020 13:25:30 -0500; Hello Group: I would be interested in emailing/speaking with anyone on the this list directly, who has had some personal experience with Grow Light RFI. Rather than take up bandwidth on this list. I; /archives//html/RFI/2020-01/msg00011.html (7,498 bytes)
22. Re: [RFI] Grow Lights (score: 1): Author: Alan Higbie <alan.higbie@gmail.com>; Date: Tue, 7 Jan 2020 11:47:51 -0700; Hi Karin ~ Ill start by saying I dont have any experience with grow light RFI but I am interested in learning what progress you make in the DFing process. I too have the National RF setup. Hoping you; /archives//html/RFI/2020-01/msg00012.html (8,676 bytes)
23. Re: [RFI] Grow Lights (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Tue, 7 Jan 2020 10:54:51 -0800; Study this and the links to NK7Z's website. 73, Jim K9YC _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi; /archives//html/RFI/2020-01/msg00013.html (6,947 bytes)
24. [RFI] Grow lights (score: 1): Author: "Karin Johnson" <karinann@tampabay.rr.com>; Date: Tue, 7 Jan 2020 14:11:15 -0500; Been there done that got the T shirt. Karin _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi; /archives//html/RFI/2020-01/msg00014.html (6,784 bytes)
25. Re: [RFI] Grow Lights (score: 1): Author: KD7JYK DM09 <kd7jyk@earthlink.net>; Date: Tue, 7 Jan 2020 11:17:50 -0800; "I am using NationalRF loops For 3 to 8 MHz." Have you considered higher frequencies, and smaller directional antennas? I often check up to around 950 MHz, increasing in frequency as I get closer to; /archives//html/RFI/2020-01/msg00015.html (7,517 bytes)
26. Re: [RFI] Grow Lights (score: 1): Author: AA5CT via RFI <rfi@contesting.com>; Date: Tue, 7 Jan 2020 19:46:27 +0000 (UTC); DFing at these frequencies is more art than science; I can locate a source to an individual house, but it takes taking a number of bearings as one 'walks the sidewalk' on the opposite side of the str; /archives//html/RFI/2020-01/msg00016.html (10,030 bytes)
27. Re: [RFI] Grow Lights (score: 1): Author: "EDWARDS, EDDIE J via RFI" <rfi@contesting.com>; Date: Tue, 7 Jan 2020 19:57:15 +0000; Karin, We have not yet had any grow light problems yet in our service area. On power-line noise tracking it's basically required to change the frequency band you're using to higher and higher frequen; /archives//html/RFI/2020-01/msg00017.html (9,774 bytes)
28. Re: [RFI] Grow Lights (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Tue, 7 Jan 2020 12:04:59 -0800; It's important to recognize the difference between electronic sources and impulse noise sources. Tracking them is VERY different -- the spectrum of electronic sources consists of harmonics of LF squa; /archives//html/RFI/2020-01/msg00018.html (9,265 bytes)
29. Re: [RFI] Grow Lights (score: 1): Author: KD7JYK DM09 <kd7jyk@earthlink.net>; Date: Tue, 7 Jan 2020 12:13:52 -0800; "We found it nearly impossible to narrow down any search on HF because of the longer wavelengths" I used HF a few times. With a 5' sense antenna, I was able to narrow down a single pole to 18 square; /archives//html/RFI/2020-01/msg00019.html (8,667 bytes)
30. Re: [RFI] Grow Lights (score: 1): Author: AA5CT via RFI <rfi@contesting.com>; Date: Tue, 7 Jan 2020 20:37:10 +0000 (UTC); re: "Impulse noise is best tracked at the highest frequencies where we can hear it -- I start around 160 MHz, then go up around 500 MHz when I get close." ALL well and good, Jim. What's the most dist; /archives//html/RFI/2020-01/msg00020.html (12,002 bytes)
31. Re: [RFI] Grow Lights (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Tue, 7 Jan 2020 12:54:33 -0800; Hi Karin, Move up in frequency until you are seeing something like S-4, or S-5, then try your DFing again... Don't expect an exact match on the spectrum. Rather, look for patterns in on'/off times...; /archives//html/RFI/2020-01/msg00021.html (10,063 bytes)
32. Re: [RFI] Grow Lights (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Tue, 7 Jan 2020 12:56:20 -0800; This assumes you actually see the RFI at higher frequencies... 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist ARRL Asst. Director, NW Division, Tec; /archives//html/RFI/2020-01/msg00022.html (10,813 bytes)
33. Re: [RFI] Grow Lights (score: 1): Author: KD7JYK DM09 <kd7jyk@earthlink.net>; Date: Tue, 7 Jan 2020 13:31:51 -0800; "This assumes you actually see the RFI at higher frequencies... " True, and I know it seems all counter-intuitive/rocket-sciencey, but one typically does not search for RFI where it does not exist, c; /archives//html/RFI/2020-01/msg00023.html (8,685 bytes)
34. Re: [RFI] Grow Lights (score: 1): Author: <bipi@comcast.net>; Date: Tue, 7 Jan 2020 13:36:31 -0800; On the subject of using a hand-held high-gain yagi at VHF or UHF, is it best to assume horizontal polarization, vertical polarization or does it matter at all? Thanks Mike K7PI ______________________; /archives//html/RFI/2020-01/msg00024.html (8,261 bytes)
35. [RFI] Grow Lights (score: 1): Author: "Karin Johnson" <karinann@tampabay.rr.com>; Date: Tue, 7 Jan 2020 16:55:41 -0500; All: Thank you for the replies. First off I've done quite a bit of DF work regarding power line based intermittent street lights with a great deal of success. Fortunately the streetlight interference; /archives//html/RFI/2020-01/msg00025.html (11,207 bytes)
36. Re: [RFI] Grow Lights (score: 1): Author: KD7JYK DM09 <kd7jyk@earthlink.net>; Date: Tue, 7 Jan 2020 13:56:52 -0800; "On the subject of using a hand-held high-gain yagi at VHF or UHF, is it best to assume horizontal polarization, vertical polarization or does it matter at all? Thanks Mike K7PI" It depends on the so; /archives//html/RFI/2020-01/msg00026.html (9,311 bytes)
37. Re: [RFI] Grow Lights (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Tue, 7 Jan 2020 14:54:40 -0800; What I am saying is that if it is a SMPS, and you go up, you won't hear it, so no need to go up... 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist A; /archives//html/RFI/2020-01/msg00027.html (9,331 bytes)
38. Re: [RFI] Grow Lights (score: 1): Author: James Jordan <k4qpl2@gmail.com>; Date: Tue, 7 Jan 2020 18:22:30 -0500; Cant offer specific help, but I would certainly be cautious about knocking on doors where you suspect powerful grow lights. They just might not be trying to get beautiful blossoms on their roses . Go; /archives//html/RFI/2020-01/msg00028.html (9,830 bytes)
39. Re: [RFI] Grow Lights (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Tue, 7 Jan 2020 15:24:38 -0800; I'm not "claiming" anything. You obviously haven't read my app note to which I posted a link, and I won't waste time here repeating it. 73, Jim K9YC _______________________________________________ RF; /archives//html/RFI/2020-01/msg00029.html (9,586 bytes)
40. Re: [RFI] Grow Lights (score: 1): Author: David Eckhardt <davearea51a@gmail.com>; Date: Tue, 7 Jan 2020 23:40:33 +0000; I've done one growlight location, not for myself, but a friend who was experiencing severe RFI from somewhere in his close neighborhood. We went around the neighborhood with some very intimidating-lo; /archives//html/RFI/2020-01/msg00030.html (11,145 bytes)

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