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Total 44 documents matching your query.

21. [RFI] Wrapping A Toroid (score: 1)
Author: "WX5L" <wx5l@charter.net>
Date: Sat, 1 Mar 2008 16:43:03 -0600
Hello, My question to the group is about wrapping 75 ohm(rg6u) coax through a solid toroid ring for TVI suppression. Is it better to wrap tightly against the toroid and ty-wrap snuggly or passing thr
/archives//html/RFI/2008-03/msg00001.html (6,533 bytes)

22. Re: [RFI] [TVI-RFI-EMI] Noise every 15Khz on 17M (score: 1)
Author: WX5L <wx5l@charter.net>
Date: Thu, 2 Oct 2008 13:51:31 -0400
John, The dead give-away is the frequency seperation of 15 khz. You are hearing the horizonal sweep noise produced by a television(15.75 khz) in your close proximity. Often this sweep noise will coup
/archives//html/RFI/2008-10/msg00003.html (13,169 bytes)

23. Re: [RFI] Hum in Bose QC2 headphones (score: 1)
Author: WX5L <wx5l@charter.net>
Date: Wed, 14 Jan 2009 13:52:07 -0500
Gary, At this point you need to check that the ground(s) in the headphone jack are still secure to the chassis of the rig. It seems that the result of a poor ground from the jack to the chassis could
/archives//html/RFI/2009-01/msg00109.html (11,204 bytes)

24. [RFI] Unknown Signals on 20 and 17 (score: 1)
Author: "WX5L" <wx5l@charter.net>
Date: Tue, 31 Mar 2009 20:01:20 -0500
Hello All, I've been hearing an unknown signal in my late afternoon 2330z to 0230z on 14.008, 14.038 and 18.090. You can clearly hear it in the USB position as it can't easily get through my CW filte
/archives//html/RFI/2009-03/msg00065.html (7,362 bytes)

25. Re: [RFI] Strange signal on 30M (score: 1)
Author: "WX5L" <wx5l@charter.net>
Date: Wed, 1 Apr 2009 18:44:28 -0500
Hello Ron, I hear the same here in Louisiana s-9 to 10 over. No beam here so can't get a direction. Maybe someone with a directional antenna can give us a direction. I cannot detect any variations in
/archives//html/RFI/2009-04/msg00001.html (8,226 bytes)

26. [RFI] Question About RFI Chokes (score: 1)
Author: "WX5L" <wx5l@charter.net>
Date: Mon, 14 Sep 2009 19:29:19 -0500
Hello, I'm about to wrap some RG-6U coaxial cable through a FT-240 #31 toroid to build TVI choke. My question is how to most efficiently wrap the coax through it? Should it be wrapped tightly against
/archives//html/RFI/2009-09/msg00047.html (7,931 bytes)

27. Re: [RFI] [Elecraft] OT: Maytag Bravos RFI (score: 1)
Author: "WX5L" <wx5l@charter.net>
Date: Thu, 24 Sep 2009 19:20:48 -0500
Don, I wouldn't be so quick to blame the top loader you just bought. S-5 RFI every 15 kc sounds like horizontal sweep noise from a nearby TV. Actually horizontal sweep is 15.75 kc and very rich in ha
/archives//html/RFI/2009-09/msg00067.html (8,184 bytes)

28. Re: [RFI] Inbound RFI - strange source affecting 160 and 80 (score: 1)
Author: "WX5L" <wx5l@charter.net>
Date: Sun, 21 Feb 2010 18:33:01 -0600
Horizontal sweep noise from a nearby TV. Actually it's 15.75 kHz and so full of harmonics that it carries well into the HF band. It couples with the cable input which acts like an antenna very nicely
/archives//html/RFI/2010-02/msg00109.html (10,087 bytes)

29. Re: [RFI] In house RFI, but (score: 1)
Author: "WX5L" <wx5l@charter.net>
Date: Tue, 26 Jun 2012 04:14:02 -0500
Roger, Circuit 18 may be feeding a doorbell transformer in the attic. Doorbell transformers have a relay that is designed to open if the transformer overheats due to internal failure. These relays ca
/archives//html/RFI/2012-06/msg00051.html (7,784 bytes)

30. Re: [RFI] 160m & 80m RFI issues requesting ideas for ANC4 sense antenna to cancell out local noise (score: 1)
Author: "WX5L" <wx5l@charter.net>
Date: Sun, 1 Nov 2015 12:02:59 -0600
Hello Don, I have been reading your thread regarding your RFI and the ANC-4 noise cancelling unit with all the sensing antenna issues. May I suggest that you devote your time, efforts and dollars int
/archives//html/RFI/2015-11/msg00007.html (9,370 bytes)

31. Re: [RFI] Doorbell Transformer RFI ?? (score: 1)
Author: "WX5L" <wx5l@charter.net>
Date: Mon, 14 Mar 2016 23:32:30 -0500
The older type doorbell transformer has a safety feature built in. A thermister monitors the heat in the windings. If it detects overheating it opens a relay to disconnect power so it doesn't combust
/archives//html/RFI/2016-03/msg00030.html (7,852 bytes)

32. [RFI] Seti (score: 1)
Author: "WX5L" <wx5l@charter.net>
Date: Wed, 31 Aug 2016 06:59:01 -0500
Carl Sagan wrote a novel and was made into a movie in 1997 starring Jodie Powell. "Contact" was an entertaining movie about receiving an unknown signal from a large radio telescope array and how they
/archives//html/RFI/2016-08/msg00190.html (7,617 bytes)

33. Re: [RFI] Nasty strong noise (score: 1)
Author: "WX5L" <wx5l@charter.net>
Date: Tue, 8 Nov 2016 20:17:45 -0600
Sandro, In my opinion, the way it alternates on and off I would believe it's some type of charging device. If you lack DF'ing equipment a small portable SW receiver is a start to locate the noise and
/archives//html/RFI/2016-11/msg00009.html (10,640 bytes)

34. Re: [RFI] PG&E (score: 1)
Author: "WX5L" <wx5l@charter.net>
Date: Sun, 19 Mar 2017 20:42:58 -0500
In regards to the issue below the first action should be a call to their "customer" 1-800 number to file an official complaint and record the help ticket reference number. Be as detailed as possible
/archives//html/RFI/2017-03/msg00080.html (11,449 bytes)

35. Re: [RFI] Solar Panel RFI/Grow light Noise Pollution (score: 1)
Author: "WX5L" <wx5l@charter.net>
Date: Sun, 2 Jul 2017 11:02:29 -0500
Do you hear any RFI in the MF range(3-30 mhz?) Randy WX5L Hi guys, Yup, solar panel RFI is here to stay, unfortunately. I think the FCC should really look into all the RFI "noise pollution" that the
/archives//html/RFI/2017-07/msg00002.html (8,315 bytes)

36. Re: [RFI] Solar Panel RFI/Grow light Noise Pollution (score: 1)
Author: "WX5L" <wx5l@charter.net>
Date: Sun, 2 Jul 2017 11:11:12 -0500
Sorry my previous post may have been confusing...My question refers to Solar Array RFI..... Has anyone detected RFI from Solar Array in the MF range(3-30 MHZ). It seems all RFI so far is in the VHF r
/archives//html/RFI/2017-07/msg00003.html (8,582 bytes)

37. [RFI] FW: Pacemaker and RFI (score: 1)
Author: < wx5l@charter.net>
Date: Wed, 17 Mar 2021 07:38:12 -0500
Greetings RFI Group, Yesterday I had a Medtronic pacemaker implanted in my chest. I was having occasional lapses in heart rhythm of 10-15 seconds about once a week. This pacemaker is of new technolog
/archives//html/RFI/2021-03/msg00039.html (7,116 bytes)

38. Re: [RFI] Another Solar Panel RFI System (score: 1)
Author: <wx5l@charter.net>
Date: Sun, 18 Dec 2022 13:56:17 -0600
There have been comments that the ARRL has the FCC's ear. Really do they? Recently Jessica Rosenworcel , FCC chairwomen has made a statement about issues with Solar Edge RFI and said that S-6 to S-9
/archives//html/RFI/2022-12/msg00040.html (9,862 bytes)

39. [RFI] S-Meter Reading verses Harmful Interference (score: 1)
Author: <wx5l@charter.net>
Date: Sun, 18 Dec 2022 19:08:28 -0600
Hello all, In regards to my comments earlier about what the FCC said constitutes "harmful interference I did make a mistake about who said it from the FCC. It was not Jessica Rosenworcel but rather L
/archives//html/RFI/2022-12/msg00047.html (8,493 bytes)

40. Re: [RFI] Another Solar Panel RFI System (score: 1)
Author: <wx5l@charter.net>
Date: Fri, 23 Dec 2022 07:50:55 -0600
Ed, Please remove Ms. Rosenworcel from this conversation. It was Laura Smith, FCC Special Council, that made the comments what she considers harmful interference and that the FCC will not step in reg
/archives//html/RFI/2022-12/msg00101.html (16,368 bytes)

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