Mail Archive Search: <+from:tlthompson@qwest.net>

Results:

References: [ +from:tlthompson@qwest.net: 66 ]

Total 66 documents matching your query.

21. Re: [RFI] RF tight rooms - somewhat OT (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Sun, 12 May 2013 18:28:25 -0600; Charlie, It seems to me if your friend just wants to make Q-meter measurements he might get by with building a 5-sided aluminum box just to contain his HP Q-meter since he is probably making measurem; /archives//html/RFI/2013-05/msg00032.html (9,709 bytes)
22. Re: [RFI] re Nineteen Hour Noise (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Sun, 02 Jun 2013 16:48:03 -0600; Dave, I live in one of those states, also (Colorado). In the last few years I have tracked down 5 growing operations that were polluting the spectrum. The sad part of this is that the electronic lamp; /archives//html/RFI/2013-06/msg00006.html (8,856 bytes)
23. Re: [RFI] re Nineteen Hour Noise (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Mon, 03 Jun 2013 10:17:40 -0600; Hi Dave, Yes I have contacted the ARRL. I helped Mike Gruber write the ARRL web page on grow lights. Do you think it is best to deal with these rfi situations one at a time or try to get at the root; /archives//html/RFI/2013-06/msg00008.html (9,731 bytes)
24. Re: [RFI] RFI Noise Problems (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Fri, 28 Jun 2013 13:56:46 -0600; Hi Tom, Any number of things could be causing that kind of noise, but my grow light noise sounds very similar to that. It is usually on a timer and has a different sound when the grow light is first; /archives//html/RFI/2013-06/msg00048.html (8,524 bytes)
25. Re: [RFI] Deja BUZZZ.. vu (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Fri, 27 Sep 2013 13:05:30 -0600; Larry, W0QE, and I developed the filters for the grow light ballast because of a neighboring grow light setup down the street. I persuaded the grower to lend me his setup for a day and Larry and I tr; /archives//html/RFI/2013-09/msg00079.html (11,752 bytes)
26. Re: [RFI] Deja BUZZZ.. vu (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Sat, 28 Sep 2013 09:31:15 -0600; Ron, If you have only one RFI source you might consider nulling it with either a Timewave or MFJ device that employs a sense antenna. They use phase and amplitude to cancel the offending signal. You; /archives//html/RFI/2013-09/msg00096.html (10,484 bytes)
27. Re: [RFI] Deja BUZZZ.. vu (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Sun, 29 Sep 2013 20:30:43 -0600; It's generally not on the power lines. It's on the house wiring and is a point source at the house. _______________________________________________ RFI mailing list RFI@contesting.com http://lists.co; /archives//html/RFI/2013-09/msg00101.html (9,017 bytes)
28. Re: [RFI] Deja BUZZZ.. vu (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Sun, 29 Sep 2013 20:33:48 -0600; It's not a dilemma in Colorado. The only crime is the RFI and the FCC recommends working with the offender. I have been considering offering training to the police to give them the tools to locate th; /archives//html/RFI/2013-09/msg00102.html (8,903 bytes)
29. Re: [RFI] LED Bulbs (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Wed, 12 Feb 2014 09:57:50 -0700; This has been my experience here in Boulder, CO. In the past several years I have dealt with 3 halogen light power supplies, 9 grow light power supplies, one power line insulator, and one video camer; /archives//html/RFI/2014-02/msg00060.html (14,182 bytes)
30. Re: [RFI] LED Bulbs (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Wed, 12 Feb 2014 10:03:27 -0700; By the way, the power company was prompt in fixing the insulator causing the RFI. Tom I was able to talk one neighbor into replacing his 12 volt halogen system with a 120 volt system which solved the; /archives//html/RFI/2014-02/msg00061.html (14,836 bytes)
31. Re: [RFI] LED Bulbs (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Wed, 12 Feb 2014 15:47:49 -0700; I will be happy to share my grow light filter solution. It does not involve opening up the ballast but since it is on the lamp side, it does involve unplugging the lamp and inserting the filter in be; /archives//html/RFI/2014-02/msg00074.html (9,990 bytes)
32. [RFI] Receiving Loop (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Wed, 12 Mar 2014 10:33:35 -0600; Ken, Hope this helps. 73, Tom Thompson W0IVJ http://www.tomthompson.com/radio/RecievingLoop/loop.html _______________________________________________ RFI mailing list RFI@contesting.com http://lists.; /archives//html/RFI/2014-03/msg00013.html (6,374 bytes)
33. Re: [RFI] My RFI battle.... (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Sat, 22 Mar 2014 11:54:29 -0600; Ken, I have tracked down many grow light operations here in Colorado. Go to my web site http://www.tomthompson.com and look under Amateur Radio. You will find information on loop antennas for trackin; /archives//html/RFI/2014-03/msg00125.html (10,413 bytes)
34. Re: [RFI] My RFI battle.... (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Sat, 22 Mar 2014 14:19:00 -0600; Hi Ken, Looks like you are making progress. If your loop is not sensitive enough, you might try building one of mine. The big loop is sensitive enough when tuned to give a good signal when the noise; /archives//html/RFI/2014-03/msg00128.html (10,234 bytes)
35. Re: [RFI] ARRL to FCC... (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Tue, 25 Mar 2014 18:28:41 -0600; Ed, I checked out a few plasma tv sets a couple of years ago with a portable shortwave receiver. The RFI was coming right out of the front of the set which made sense since that was where the dischar; /archives//html/RFI/2014-03/msg00186.html (12,363 bytes)
36. Re: [RFI] ARRL to FCC... (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Tue, 25 Mar 2014 20:26:53 -0600; Dale, I was in a store and just moved from tv to tv. Just the plasma tv sets were noisy but I was only a few feet away. If I had it to do over again I would have clamped my rf probe around the power; /archives//html/RFI/2014-03/msg00190.html (13,826 bytes)
37. Re: [RFI] ARRL to FCC... (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Wed, 26 Mar 2014 12:18:32 -0600; Dale, I checked with Costco and they only carry LED back lit TV sets now. In thinking about it further, I don't think making a measurement on the power cord with an RF current probe would be too defi; /archives//html/RFI/2014-03/msg00197.html (16,205 bytes)
38. Re: [RFI] ARRL to FCC... (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Wed, 26 Mar 2014 15:24:22 -0600; Ed, As you well know, all common mode chokes are not created equally. Do you have any details on the chokes that did and did not work? Tom W0IVJ Tom, I'd love to do a lot of stuff with their tv, but; /archives//html/RFI/2014-03/msg00204.html (18,286 bytes)
39. Re: [RFI] ARRL to FCC... (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Wed, 26 Mar 2014 18:44:19 -0600; Hi Don, Thanks for the information. Those common mode chokes certainly are effective. Your experience would suggest that it is not just radiation emitting from the front of the screen that causes the; /archives//html/RFI/2014-03/msg00208.html (26,362 bytes)
40. Re: [RFI] Grow-light.. (score: 1): Author: Tom Thompson <tlthompson@qwest.net>; Date: Thu, 27 Mar 2014 09:55:16 -0600; Ken, Look at http://tomthompson.com/radio/GrowLight/GrowLightBallastFilter.html and you will see the white door illuminated by a high pressure sodium light. Tom W0IVJ The reason I ask is that last ni; /archives//html/RFI/2014-03/msg00220.html (8,255 bytes)

Current List: 21 - 40
Page: [1] [2] [3] [4]