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1. [RFI] 160 meter RFI (score: 1): Author: Palomar at compuserve.com (Palomar Engineers); Date: Sun Jan 26 20:59:11 2003; For the 160 meter RFI: As a precaution put a ferrite balun (line isolator) at the feedpoint and another as the coax enters the house. It is more likely that direct radiation from the antenna is getti; /archives//html/RFI/2003-01/msg00066.html (6,491 bytes)
2. [RFI] 160 Meter RFI (score: 1): Author: Ray <rayk9rs@gmail.com>; Date: Wed, 5 Dec 2018 12:10:25 -0500; I have this 160 Meter RFI : https://youtu.be/QI08sE2FS40 It shows up once or twice an hour for 5 to 10 minutes. Any ideas what it is? Thanks, Ray K9RS _______________________________________________; /archives//html/RFI/2018-12/msg00014.html (6,265 bytes)
3. Re: [RFI] 160 Meter RFI (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Wed, 5 Dec 2018 11:11:13 -0800; This video is unavailable. Here's an applications note on identifying and chasing noise. http://k9yc.com/KillingReceiveNoise.pdf Also check out NK7Z's website. 73, Jim K9YC On 12/5/2018 9:10 AM, Ray; /archives//html/RFI/2018-12/msg00017.html (7,385 bytes)
4. Re: [RFI] 160 Meter RFI (score: 1): Author: "Dave Cole (NK7Z)" <dave@nk7z.net>; Date: Wed, 5 Dec 2018 14:29:08 -0800; Hi Ray, Trying to guess the source from looking at captures can be tough... That said, here are a few questions: 1. Does it ever change sound? 2. Does it run on a schedule? 3. It is always the same?; /archives//html/RFI/2018-12/msg00020.html (8,587 bytes)
5. Re: [RFI] 160 Meter RFI (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Thu, 6 Dec 2018 15:30:06 +0000; Switchers generally show the following characteristics: They create noise every N kHz over a broad frequency range, with N typically being 10 to 100 kHz. The may be on continuously, but may also come; /archives//html/RFI/2018-12/msg00022.html (11,644 bytes)
6. Re: [RFI] 160 Meter RFI (score: 1): Author: "Dave Cole (NK7Z)" <dave@nk7z.net>; Date: Thu, 6 Dec 2018 07:40:27 -0800; Ed, Where do I get one of those? :) 73s and thanks, Dave (NK7Z/NNR0DC) https://www.nk7z.net ARRL Technical Specialist ARRL Volunteer Examiner ARRL OOC for Oregon On 12/6/18 7:30 AM, Hare, Ed W1RFI wr; /archives//html/RFI/2018-12/msg00023.html (7,802 bytes)
7. Re: [RFI] 160 Meter RFI (score: 1): Author: Mike Martin <mike@rfiservices.com>; Date: Thu, 06 Dec 2018 10:39:13 -0500; I totally agree with Ed. One fairly consistent rule is if the noise changes rapidly like within seconds constant changes would indicate a TV power supply. The TV power supply load changes with the de; /archives//html/RFI/2018-12/msg00024.html (13,177 bytes)
8. Re: [RFI] 160 Meter RFI (score: 1): Author: "Hare, Ed W1RFI" <w1rfi@arrl.org>; Date: Thu, 6 Dec 2018 16:00:44 +0000; Could that also be changes in the video scene being radiated? In general, the power supply will be rather hummy and its frequency may drift. When I heard a plasma TV, it was very stable with frequenc; /archives//html/RFI/2018-12/msg00025.html (13,511 bytes)
9. Re: [RFI] 160 Meter RFI (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Thu, 6 Dec 2018 10:21:04 -0800; On 12/6/2018 8:00 AM, Hare, Ed W1RFI wrote: Could that also be changes in the video scene being radiated? In general, the power supply will be rather hummy and its frequency may drift. When I heard a; /archives//html/RFI/2018-12/msg00029.html (8,565 bytes)
10. Re: [RFI] 160 Meter RFI (score: 1): Author: Ray <rayk9rs@gmail.com>; Date: Thu, 6 Dec 2018 16:41:30 -0500; Thanks Dave and everyone else who responded. To answer your questions: It does change sounds right at the end and sounds like a few tones before it disappears. It seems to be on every 20 to 45 minute; /archives//html/RFI/2018-12/msg00030.html (10,841 bytes)
11. Re: [RFI] 160 Meter RFI (score: 1): Author: "David Robbins" <k1ttt@verizon.net>; Date: Thu, 06 Dec 2018 17:04:43 -0500; I would start with the smallest antenna you can hear it on from home. I have had good luck with a 3 or 4 turn loop about 18" in diameter, and for closer in just the built in ferrite loopstick in a gr; /archives//html/RFI/2018-12/msg00031.html (13,067 bytes)
12. Re: [RFI] 160 Meter RFI (score: 1): Author: "Dave Cole (NK7Z)" <dave@nk7z.net>; Date: Thu, 6 Dec 2018 16:02:47 -0800; Ray, See if it is hearable on the AM Broadcast band... If so, take a portable radio, and DF using that... Use the NULL, not the peak for DFing, is using the internal loop... 73s and thanks, Dave (NK7; /archives//html/RFI/2018-12/msg00032.html (11,596 bytes)

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