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21. Re: [RFI] Netgear GS724T switch (score: 1): Author: <nlsa@nlsa.com>; Date: Thu, 22 Jun 2023 19:52:19 -0400; Gary Thats encouraging! Did you select the Netgear GS116PP intentionally or was it luck of the draw that you got an RF-quiet model? Best regards, Michael From: gwj@me.com <gwj@me.com> Sent: Thursday,; /archives//html/RFI/2023-06/msg00038.html (9,260 bytes)
22. [RFI] Ethernet noise (score: 1): Author: <nlsa@nlsa.com>; Date: Sat, 23 Sep 2023 12:20:29 -0400; Dear friends, I have several dB of broadband RFI in my 2m EME system. I suspect that some of it results from ethernet cabling. The station has about a dozen modules (SDR, transverter, SSPA, etc.) tha; /archives//html/RFI/2023-09/msg00038.html (6,635 bytes)
23. [RFI] Filtering 220VAC (score: 1): Author: <nlsa@nlsa.com>; Date: Thu, 19 Oct 2023 08:46:49 -0400; Dear friends, When applying a common-mode filter (such as toroids) to a North American 220VAC line, only the two "hot" conductors should be included, correct? Not the neutral. W9IP __________________; /archives//html/RFI/2023-10/msg00009.html (6,286 bytes)
24. Re: [RFI] Filtering 220VAC (score: 1): Author: <nlsa@nlsa.com>; Date: Thu, 19 Oct 2023 18:45:26 -0400; Dear Jim & all, Thanks to everyone for their responses on- and off-net. It has been unanimous that the neutral wire should not be excluded in add-on filters. My question was an product of an RFI prob; /archives//html/RFI/2023-10/msg00014.html (9,032 bytes)
25. Re: [RFI] Filtering 220VAC (score: 1): Author: <nlsa@nlsa.com>; Date: Fri, 20 Oct 2023 04:55:25 -0400; Jim, You're right of course. Thank you for correcting. On page 23 of your tutorial, you write, "Commercial AC power line filters (Fig 29) are generally a waste of money, because they provide only dif; /archives//html/RFI/2023-10/msg00016.html (10,936 bytes)
26. Re: [RFI] Filtering 220VAC : Success (score: 1): Author: <nlsa@nlsa.com>; Date: Fri, 20 Oct 2023 14:32:21 -0400; Dear friends, After re-winding the 3-core toroidal choke and adding some 1,000pF bypass capacitors to the AC input and VFD output, there is virtually no increase in my noise floor when the elevation; /archives//html/RFI/2023-10/msg00023.html (11,001 bytes)
27. Re: [RFI] Filtering 220VAC : Success (score: 1): Author: <nlsa@nlsa.com>; Date: Fri, 20 Oct 2023 15:35:11 -0400; Dear Michael I neglected to mention that it took me ten years. :) Best, Michael From: Michael Martin <mike@rfiservices.com> Sent: Friday, October 20, 2023 2:40 PM To: nlsa@nlsa.com Cc: Rfi List <rfi@; /archives//html/RFI/2023-10/msg00027.html (12,566 bytes)
28. Re: [RFI] Filtering 220VAC : Success (score: 1): Author: <nlsa@nlsa.com>; Date: Fri, 20 Oct 2023 16:00:17 -0400; Dear Frank, You got my attention! I will correct my mistake right away. W9IP Please be very careful about applying W9IP's experience before his good advice causes major property loss or someone gets; /archives//html/RFI/2023-10/msg00028.html (14,583 bytes)
29. [RFI] Sources of wideband hiss (score: 1): Author: <nlsa@nlsa.com>; Date: Sat, 23 Dec 2023 14:09:53 -0500; Dear friends, What are some sources of wideband hiss? I'm talking about an unstructured, apparently unmodulated many-dB increase in the noise floor across the 2m band* No associated birdies or other; /archives//html/RFI/2023-12/msg00002.html (7,326 bytes)
30. Re: [RFI] Sources of wideband hiss (score: 1): Author: <nlsa@nlsa.com>; Date: Sat, 23 Dec 2023 21:46:46 -0500; Dear Jim Its just a general rise in the noise floor, as if you turned the audio volume up. It sounds like noise; perhaps hiss is not the best word to use. Michael Q: What mode are you using to note '; /archives//html/RFI/2023-12/msg00018.html (9,090 bytes)
31. Re: [RFI] Sources of wideband hiss (score: 1): Author: <nlsa@nlsa.com>; Date: Sat, 23 Dec 2023 21:57:42 -0500; Gary - My RF environment is definitely a challenge. Several multi-kW FM radio stations and three TV stations within 5-6 km line-of-sight. I implemented a sharp OCI helical filter <https://www.ocicom.; /archives//html/RFI/2023-12/msg00019.html (10,078 bytes)
32. Re: [RFI] Sources of wideband hiss (score: 1): Author: <nlsa@nlsa.com>; Date: Sat, 23 Dec 2023 21:59:00 -0500; Dear Frank, I have already taken both of these fundamental steps. I know the direction from which the noise is coming; my question to the list was, " What are some sources of wideband hiss?" What is; /archives//html/RFI/2023-12/msg00020.html (10,010 bytes)
33. [RFI] Large ferrite chokes on power cables (score: 1): Author: <nlsa@nlsa.com>; Date: Wed, 27 Mar 2024 06:15:52 -0400; Dear friends, If I suspect that RFI is coupling to the 200A service entrance that feeds my solar panel inverters. Is it feasible to install a ferrite choke on this big cable? Besides the obvious need; /archives//html/RFI/2024-03/msg00046.html (6,729 bytes)
34. Re: [RFI] Large ferrite chokes on power cables (score: 1): Author: <nlsa@nlsa.com>; Date: Wed, 27 Mar 2024 21:44:23 -0400; Dave - Thank you for the answers. Luckily, 144 MHz is my only interest so ferrite chokes might be helpful. We'll see. 73, W9IP Not surprising, components like this are often poorly designed, ignoring; /archives//html/RFI/2024-03/msg00051.html (8,507 bytes)

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