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61. Re: [RFI] Polarity Tests -- Great Work, Wrong Word (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Tue, 13 Jun 2017 13:13:16 -0600; Hi Jim, Thanks for the correction. OMG what a mess. Polarity appeared everywhere in my text, in my folder names in my links, in my html heading... I think I got it corrected. Here is the corrected li; /archives//html/RFI/2017-06/msg00021.html (10,796 bytes)
62. [RFI] Antenna Polarization Tests (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Tue, 13 Jun 2017 13:19:19 -0600; Some of you have mentioned in the past about using a tuned loop for tracking RFI. A question has sometimes arose about the direction of the null of the loop. Larry Benko, W0QE, and I did some polarit; /archives//html/RFI/2017-06/msg00022.html (7,539 bytes)
63. Re: [RFI] Polarization Tests (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Tue, 13 Jun 2017 14:14:24 -0600; Hi JW, The feed line on the loop was chocked with two common mode chokes. The null on the loop is quite deep. The orientation not being as precise as it could be is the reason the null is not as deep; /archives//html/RFI/2017-06/msg00025.html (9,919 bytes)
64. Re: [RFI] Polarization Tests (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Tue, 13 Jun 2017 14:20:05 -0600; Hi Lee, As you well know, the null on the loop is very sensitive to position. I just oriented the loop to a position without having the benefit of seeing the receiver response. Therefore, as stated i; /archives//html/RFI/2017-06/msg00026.html (9,305 bytes)
65. Re: [RFI] Antenna Polarization Tests (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Tue, 13 Jun 2017 15:34:33 -0600; Bruce, True, but that is the polarization you see from an RFI source in a residence. chamber, therefore, there will be reflection both from the ground as well as any nearby objects which will effect; /archives//html/RFI/2017-06/msg00028.html (10,055 bytes)
66. Re: [RFI] white noise starting at 3780 and up (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Sun, 16 Jul 2017 07:19:02 -0600; Hi Bob, I have seen the same thing from CenturyLink VDSL2 uplink modem leakage. Tom W0IVJ I've been tolerating something here that is a nuisance for the past few years: Tuning up through 75 meters, a; /archives//html/RFI/2017-07/msg00029.html (8,758 bytes)
67. Re: [RFI] Comcast - 80 meters rings phones (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Sun, 19 Nov 2017 09:59:44 -0700; Hi Steve, The RF is probably getting into the normal telephone after the Comcast modem. I would try a filter between the modem and the phone. Enclosed is a schematic of a filter that I have good su; /archives//html/RFI/2017-11/msg00044.html (8,523 bytes)
68. Re: [RFI] LED lights to avoid (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Sun, 28 Jan 2018 16:57:54 -0700; I have noticed that Home Depot sells commercially rated devices to the average consumer. I don't think they are supposed to do that. Tom W0IVJ 7 3 Bob N2SCJ A ham friend did some kitchen remodelin; /archives//html/RFI/2018-01/msg00120.html (10,348 bytes)
69. Re: [RFI] Lighting grow cycle of Pot... (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Wed, 21 Feb 2018 09:40:01 -0700; Dave, From what have observed, the lights are on continually for about two weeks and then a 12 hours on / 12 hours off until harvest which can take a number of months. Depending on the setup, the l; /archives//html/RFI/2018-02/msg00075.html (8,325 bytes)
70. Re: [RFI] Solar Panel RFI in Kings Park - Update October 4th 2018 (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Sat, 6 Oct 2018 14:04:21 -0600; It won't. If you put a transmitter inside a screen room with an external antenna, it will radiate. Tom W0IVJ The RF Engineers from Solar Edger came out to my home this week to assess the noise ema; /archives//html/RFI/2018-10/msg00002.html (9,378 bytes)
71. Re: [RFI] New Interference at kk0sd (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Tue, 23 Mar 2021 12:27:45 -0600; See: http://tomthompson.com/radio/ReceivingLoop/loop.html for a tuned loop. You can build one in a couple of hours from your junk box. This type of loop does not work well for power line noise (; /archives//html/RFI/2021-03/msg00091.html (30,601 bytes)
72. Re: [RFI] RF Exposure Radiation Study (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Sat, 27 Mar 2021 12:16:34 -0600; Frank, Does this work for you? http://www.lakewashingtonhamclub.org/resources/rf-exposure-calculator/ Tom W0IVJ Does anyone know of any business that does RF exposure radiation studies in the 3-30; /archives//html/RFI/2021-03/msg00130.html (7,300 bytes)
73. Re: [RFI] Wireless Power Transfer with electric vehicles (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Sun, 11 Apr 2021 12:09:46 -0600; I looked at the video and 6:50 into it there is a proposed schematic that has a classic switch mode power supply circuit. At 21 kW, that is really going to create a lot of RFI unless they do a great; /archives//html/RFI/2021-04/msg00070.html (13,173 bytes)
74. Re: [RFI] Another Solar Panel RFI System (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Wed, 28 Dec 2022 11:22:00 -0700; When I am discussing with a neighbor about getting into their device , I use the following analogy: /If you have a leak in your roof, it is fine until it rains. When it starts raining and the roof l; /archives//html/RFI/2022-12/msg00172.html (23,684 bytes)
75. [RFI] BELKA HF Radio Receiver (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Thu, 18 May 2023 11:15:00 -0600; I just received my BELKA receiver from BELRIG https://belrig.by/belka%20dx in Belarus. This receiver is about the size of a package of cigarettes measuring 85X50X20 mm. It covers 0.1-31 MHz wi; /archives//html/RFI/2023-05/msg00003.html (7,084 bytes)
76. Re: [RFI] How to approach a neighbor? (score: 1): Author: Tom Thompson <w0ivj@tomthompson.com>; Date: Tue, 26 Sep 2023 16:05:42 -0600; Dave, Back in the day when I was having a lot of grow light RFI, I found the best way to approach a person was to knock on the door and then back away. Explain the situation and you might mention th; /archives//html/RFI/2023-09/msg00054.html (9,249 bytes)

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