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41. Re: [RFI] LED Bulb RFI (score: 1): Author: Gary Johnson <gwj@wb9jps.com>; Date: Thu, 8 Jul 2021 13:48:51 -0700; CMC can be measured with a commercial current probe (e.g. Tektronix, Fischer Custom Communications) and spectrum analyzer, or with a homebrew current transformer. Details on how I made mine are in th; /archives//html/RFI/2021-07/msg00032.html (7,734 bytes)
42. Re: [RFI] RG-400 UV Resistance? (score: 1): Author: Gary Johnson <gwj@wb9jps.com>; Date: Tue, 13 Jul 2021 22:28:45 -0700; Here is a relevant observation on Belden RG-304 which is similar. A 100 ft length was outside in NorCal weather for at least 18 years. I am reusing it regularly. The tan jacket darkened slightly. The; /archives//html/RFI/2021-07/msg00048.html (7,326 bytes)
43. Re: [RFI] periodic peaks in the spectrum (score: 1): Author: Gary Johnson <gwj@wb9jps.com>; Date: Thu, 22 Jul 2021 15:15:56 -0700; Good work as usual, Don. I'm all for simple! I'd like to include your link below on my RFI page. This is exactly the kind of tool that the members of our local clubs can benefit from as they discover; /archives//html/RFI/2021-07/msg00066.html (9,480 bytes)
44. Re: [RFI] DFing intermittent connection (score: 1): Author: Gary Johnson <gwj@wb9jps.com>; Date: Sun, 8 Aug 2021 14:41:21 -0700; Bonding of the mast to the tower has been mentioned in the past. Thrust bearings and rotators are not necessarily great electrical commutators. Since those connections are near the most intense RF fi; /archives//html/RFI/2021-08/msg00019.html (8,269 bytes)
45. Re: [RFI] UPS recommendations -which Tripp Lite models (score: 1): Author: Gary Johnson <gwj@wb9jps.com>; Date: Mon, 23 Aug 2021 21:03:57 -0700; What Jim said. Highly recommended. I will not buy another Tripp-Lite unit after my recent experiences. Gary NA6O _______________________________________________ RFI mailing list RFI@contesting.com ht; /archives//html/RFI/2021-08/msg00094.html (7,961 bytes)
46. [RFI] Samlex SEC-1235M RFI test report (score: 1): Author: Gary Johnson <gwj@wb9jps.com>; Date: Wed, 8 Sep 2021 14:12:01 -0700; Here is a detailed conducted emissions test report on the ubiquitous Samlex SEC-1235M power supply. It's among the quietest switching supplies I have ever tested. http://wb9jps.com/Gary_Johnson/RFI_f; /archives//html/RFI/2021-09/msg00000.html (6,065 bytes)
47. Re: [RFI] RFI from mini-splits. (score: 1): Author: Gary Johnson <gwj@wb9jps.com>; Date: Wed, 22 Sep 2021 19:06:58 -0700; At our remote site, we have a year-old Mitsubishi 12000 BTU mini-split. It is located right under our 30 ft tower with Yagis and wire antennas. There is no detectable elevation of the noise floor no; /archives//html/RFI/2021-09/msg00088.html (7,667 bytes)
48. Re: [RFI] RFI LG Refrig Corcom filter and #31 core (score: 1): Author: Gary Johnson <gwj@wb9jps.com>; Date: Wed, 29 Sep 2021 16:09:57 -0700; I concur that in some situations both a normal-mode filter (e.g. Corcom) and a common-mode choke are required. Mitigating a big Tripp-Lite UPS was like that. I carefully tested each approach and it w; /archives//html/RFI/2021-09/msg00137.html (8,330 bytes)

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