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41. Re: [RFI] Ultrasonic Dish - CORRECTION (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Wed, 02 Jan 2013 16:01:12 -0500; But I was wrong! I should have reviewed my notes before posting that. The commonly available transducers have a 10 dB beamwidth of ~65 degrees. 10 dB down at the edges of a dish is considered optimum; /archives//html/RFI/2013-01/msg00017.html (9,545 bytes)
42. Re: [RFI] Ultrasonic Dish (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Wed, 02 Jan 2013 17:57:14 -0500; I'm just looking to tell WHICH POLE is arcing. The tool for that, as Lee said, is a VHF/UHF AM receiver, preferably with directional antenna. You find the pole with RF, specific hardware with ultras; /archives//html/RFI/2013-01/msg00025.html (10,642 bytes)
43. Re: [RFI] Ultrasonic Dish (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Wed, 02 Jan 2013 18:21:22 -0500; Thanks for all the info. That makes great sense. I've been using an MFJ RFI detector which gets me in the neighborhood and I need something that gets me closer. I was considering a hokey ultrasonic d; /archives//html/RFI/2013-01/msg00027.html (9,403 bytes)
44. Re: [RFI] Electrical transfomer near shack, a problem? (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Thu, 10 Jan 2013 15:41:34 -0500; I was surprised by one of the things we found here this past summer. One of my stronger noise sources was being heard on all bands 1.8 to 50 MHz. It may have extended well beyond that but I don't hav; /archives//html/RFI/2013-01/msg00072.html (10,168 bytes)
45. Re: [RFI] 9Khz spacing of intermodes carriers interference (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Wed, 23 Jan 2013 13:16:29 -0500; On 01/20/2013 02:20 PM, Jim Brown wrote: I continue to be amazed that new members don't seem to study the long history of a reflector like this one before posting questions. The noise source is clear; /archives//html/RFI/2013-01/msg00136.html (9,686 bytes)
46. [RFI] RFI suppression cores for 147 MHz (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Wed, 27 Feb 2013 11:42:47 -0500; I could use a little guidance. I have a case involving radiation from ethernet cables at 147 MHz. The common clamp-on cores seem to offer about 250-300 ohms ESR. It looks like I probably need a lot o; /archives//html/RFI/2013-02/msg00033.html (6,771 bytes)
47. Re: [RFI] router RFI (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Mon, 04 Mar 2013 00:51:15 -0500; Dale and Cortland -- something you could do for us is provide a good description of the spectra that typically results from Ethernet traffic so that we can identify it. Those slightly modulated carr; /archives//html/RFI/2013-03/msg00012.html (8,254 bytes)
48. Re: [RFI] router RFI (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Tue, 05 Mar 2013 14:41:26 -0500; Paul, that is most unfortunate about the situation at your County EC person. Separation distance is an effective tool to reduce the effects of unwanted emissions on victim receivers. If that person; /archives//html/RFI/2013-03/msg00018.html (8,572 bytes)
49. Re: [RFI] router RFI (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Tue, 05 Mar 2013 14:57:52 -0500; Hi Jim, Actually we knew it was is own network, which he needs to stay up at all times. The offending device is either his wired router or cable modem. I wasn't able to determine which with any degre; /archives//html/RFI/2013-03/msg00019.html (11,338 bytes)
50. Re: [RFI] Nineteen Hour Noise (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Mon, 11 Mar 2013 08:07:05 -0400; Yup. Nearly all of my power line noise hunting last summer was done on foot, occasionally up to 20 miles in a single day. Late in the season I graduated to a bicycle for coarse hunting, with walking; /archives//html/RFI/2013-03/msg00048.html (8,687 bytes)
51. Re: [RFI] Ultra Sonics (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Mon, 15 Apr 2013 09:58:40 -0400; Disclaimer: I was on the beta test team for the RX3. The RX3 is a huge improvement over the RX2. I have not tested the RX1 but looking at the schematic I suspect the RX3 would beat it by a wide margi; /archives//html/RFI/2013-04/msg00006.html (8,016 bytes)
52. Re: [RFI] Is it true this is "immune" to generating RFI? (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Sun, 28 Apr 2013 18:55:48 -0400; Maybe I missed it because I only took time to skim, but I didn't see where it said anything about not *generating* RFI. I saw one comment that said something about ethernet not being particularly pro; /archives//html/RFI/2013-04/msg00084.html (8,848 bytes)
53. Re: [RFI] Quiet Dimmers For 120V Incandescents (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Sun, 25 Aug 2013 13:27:21 -0400; Not cheap but when in doubt, buy the most expensive. Generally speaking I tend to agree when it comes to RFI, but I had an interesting experience several years ago. I bought at $42 light dimmer that; /archives//html/RFI/2013-08/msg00040.html (7,794 bytes)
54. Re: [RFI] Found the every few second beep on 80 (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Tue, 10 Sep 2013 05:42:40 -0400; 4 turns on a 2.5 inch long type 31 core does nothing I'm not sure what type of core you are referring to. It sounds like it isn't a toroid. However, on a 2.4" OD toroid of type 31 material, 4 turns w; /archives//html/RFI/2013-09/msg00019.html (7,737 bytes)
55. Re: [RFI] Samsung Computer Monitor an RFI Dog (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Wed, 25 Sep 2013 06:51:23 -0400; My Vizio LCD TV will turn on if I transmit with 100 watts or more on 160 meters using the inverted V with one leg running about 20 20 feet above the house. Mine will turn off using the remote, howeve; /archives//html/RFI/2013-09/msg00061.html (9,759 bytes)
56. Re: [RFI] Samsung Computer Monitor an RFI Dog (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Wed, 25 Sep 2013 06:57:12 -0400; There should have been just one "20" in there. :-) I forgot to add: after turning on it will randomly change channel while I'm transmitting. 73, Paul On 09/25/2013 06:51 AM, N1BUG wrote: My Vizio LCD; /archives//html/RFI/2013-09/msg00062.html (11,098 bytes)
57. [RFI] Street lights (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Sun, 24 Nov 2013 06:16:42 -0500; I'm wondering about noisy street lights - specifically the pattern where noise is present for a couple of minutes, then goes away for a similar period of time. It has been said the noise is due to th; /archives//html/RFI/2013-11/msg00061.html (7,476 bytes)
58. Re: [RFI] Listen to a Sample of what Plasma TV RFI Sounds Like (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Mon, 07 Apr 2014 10:24:01 -0400; I agree. The plasma TV RFI I have heard changes like that. Sometimes less, sometimes more, but similar. -- Paul Kelley, N1BUG RFI Committee chair, Piscataquis Amateur Radio Club http://www.k1pq.org _; /archives//html/RFI/2014-04/msg00057.html (8,518 bytes)
59. Re: [RFI] Utility coming tomorrow to chase RFI (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Thu, 05 Jun 2014 07:34:16 -0400; I would be VERY interested in hearing audio recordings of power line noise heard at VHF or UHF using ANY and ALL of the HTs with AM reception. Why? because two years ago I bought an Alinco DJ-X11T fo; /archives//html/RFI/2014-06/msg00030.html (10,890 bytes)
60. Re: [RFI] Noisy computer Power Supply (score: 1): Author: N1BUG <paul@n1bug.com>; Date: Thu, 05 Jun 2014 11:01:08 -0400; Unfortunately they are discontinued now, but my two Thermaltake W0100RU supplies were clean at HF/VHF/UHF. -- Paul Kelley, N1BUG RFI Committee chair, Piscataquis Amateur Radio Club http://www.k1pq.or; /archives//html/RFI/2014-06/msg00034.html (7,855 bytes)

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