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Total 20 documents matching your query.

1. [RFI] Question (score: 1): Author: kmarch@ix.netcom.com (kate); Date: Wed, 24 Oct 2001 13:18:04 -0700; Can anyone suggest what might be the type of system that makes the following noise? The noise is centered on the 160M band and consists of series of tones, spaced up and down the band. Each tone is o; /archives//html/RFI/2001-10/msg00010.html (7,420 bytes)
2. [RFI] Question (score: 1): Author: ka5s@earthlink.net (Cortland Richmond); Date: Fri, 26 Oct 2001 08:43:18 -0700; SOUNDS like a low-res monitor display. Is there a public access video sign nearby? Cortland; /archives//html/RFI/2001-10/msg00022.html (6,270 bytes)
3. [RFI] QUESTION (score: 1): Author: David Eckhardt <davearea51a@gmail.com>; Date: Tue, 22 Dec 2020 00:05:02 +0000; I'm out of ideas on this one! Where does the raspy modulation come from on the harmonics which changes with position in my radio room on a battery operated receiver? Situation: transmit on 7.010 MHz; /archives//html/RFI/2020-12/msg00100.html (7,617 bytes)
4. [RFI] QUESTION (score: 1): Author: Gary Johnson <gwj@wb9jps.com>; Date: Mon, 21 Dec 2020 16:48:16 -0800; Thats easy. RF is picked up on the AC lines then enters any nonlinear device plugged into those lines, such as a walk wart. There, RF is rectified, harmonics are generated, and thats mixed with all t; /archives//html/RFI/2020-12/msg00101.html (8,013 bytes)
5. Re: [RFI] QUESTION (score: 1): Author: Lee STRAHAN <k7tjr@msn.com>; Date: Tue, 22 Dec 2020 01:02:45 +0000; Dave, You are likely overloading your walk about receiver with the fundamental 7 MHz frequency causing all kinds of blocking and mixing in the Grundig at other frequencies.. Lee K7TJR I'm out of idea; /archives//html/RFI/2020-12/msg00102.html (8,047 bytes)
6. Re: [RFI] QUESTION (score: 1): Author: K9MA <k9ma@sdellington.us>; Date: Mon, 21 Dec 2020 21:56:26 -0600; I saw something like this when I was testing a QRP transceiver, listening via the main antenna on the K3/P3. Even on the fundamental, it looked like there was all sorts of hash, sidebands, etc. It wa; /archives//html/RFI/2020-12/msg00103.html (9,251 bytes)
7. Re: [RFI] QUESTION (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Mon, 21 Dec 2020 21:50:45 -0800; On 12/21/2020 4:48 PM, Gary Johnson wrote: Thats easy. RF is picked up on the AC lines then enters any nonlinear device plugged into those lines, such as a walk wart. There, RF is rectified, harmonic; /archives//html/RFI/2020-12/msg00104.html (8,254 bytes)
8. Re: [RFI] QUESTION (score: 1): Author: "Tim Duffy" <k3lr@k3lr.com>; Date: Tue, 22 Dec 2020 00:54:58 -0500; Hello Jim: You are spot on. I have these installed at K3LR: https://www.dxengineering.com/parts/dxe-bbgk-2-55-p Stopped RFI - bonding around the rotor. 73 Tim K3LR Yes. W3LPL alerted many of us to th; /archives//html/RFI/2020-12/msg00105.html (8,383 bytes)
9. Re: [RFI] QUESTION (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Mon, 21 Dec 2020 22:50:43 -0800; Stopped RFI - bonding around the rotor. Thank Frank for that! 73, Jim K9YC _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/list; /archives//html/RFI/2020-12/msg00106.html (7,573 bytes)
10. Re: [RFI] QUESTION (score: 1): Author: donovanf@erols.com; Date: Tue, 22 Dec 2020 16:53:34 -0500 (EST); Hi Gary, The process for identifying this type of RFI is the same as for any other RFI, except you need to use your transmitter to excite the RFI generating source. First verify that the RFI is not c; /archives//html/RFI/2020-12/msg00107.html (10,235 bytes)
11. Re: [RFI] QUESTION (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Tue, 22 Dec 2020 13:59:50 -0800; I have a handy flow chart for location of RFI at: https://www.nk7z.net/i-have-rfi-now-what-locating-it/ Plus a few hints on location of RFI at the same URL. 73, and thanks, Dave (NK7Z) https://www.nk; /archives//html/RFI/2020-12/msg00108.html (11,451 bytes)
12. Re: [RFI] QUESTION (score: 1): Author: Jim Brown <jim@audiosystemsgroup.com>; Date: Tue, 22 Dec 2020 14:30:48 -0800; Yes, Dave has developed a lot of great advice on chasing RFI. 73, Jim K9YC https://www.nk7z.net/i-have-rfi-now-what-locating-it/ Plus a few hints on location of RFI at the same URL. _________________; /archives//html/RFI/2020-12/msg00109.html (7,833 bytes)
13. Re: [RFI] QUESTION (score: 1): Author: WW3S <ww3s@zoominternet.net>; Date: Tue, 22 Dec 2020 17:59:56 -0500; One caveat to kill all the breakers....if you have phone service along with cable tv, you probably have a battery backup in your modem to provide phone service in the event of a power outage....that; /archives//html/RFI/2020-12/msg00110.html (12,425 bytes)
14. Re: [RFI] QUESTION (score: 1): Author: Dave Cole <dave@nk7z.net>; Date: Tue, 22 Dec 2020 16:02:23 -0800; Thanks Jim, That means a lot coming from you! Merry Christmas, or Happy Holidays to you, your call!! 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist; /archives//html/RFI/2020-12/msg00111.html (9,213 bytes)
15. Re: [RFI] QUESTION (score: 1): Author: David Eckhardt <davearea51a@gmail.com>; Date: Wed, 23 Dec 2020 00:24:28 +0000; Yes, indeed. A Merry and Blessed Christmas and rewarding New Year to everyone on the group. May all the Solar Power Installation near you all mysteriously cease operation for the new year Dave - WØLE; /archives//html/RFI/2020-12/msg00112.html (9,996 bytes)
16. Re: [RFI] QUESTION (score: 1): Author: Dan K2YWE <dan.k2ywe@gmail.com>; Date: Tue, 22 Dec 2020 19:53:42 -0500; Solar power is certainly in our country's future. Hams should be lobbying as a group for centralized solar farms to try to stem the explosion of local noise sources. 73 QWH QWM, Dan K2YWE (K3AU) ____; /archives//html/RFI/2020-12/msg00113.html (10,896 bytes)
17. Re: [RFI] QUESTION (score: 1): Author: David Eckhardt <davearea51a@gmail.com>; Date: Wed, 23 Dec 2020 01:20:49 +0000; I couldn't agree more with you more, Dave. But we, as amateur radio operators, have little say with FCC. Money is required to get the attention of FCC these days. Lots of it!!! Clean installations ca; /archives//html/RFI/2020-12/msg00114.html (12,274 bytes)
18. Re: [RFI] QUESTION (score: 1): Author: "Eddie Edwards" <eddieedwards@centurylink.net>; Date: Wed, 23 Dec 2020 12:28:26 -0600; As Jamie, WW3S pointed out with the Telephone/cable-modem UPS as RFI Sources even when AC power is turned off at the main breaker panel, some other home UPS units for computers or any smart appliance; /archives//html/RFI/2020-12/msg00115.html (13,435 bytes)
19. Re: [RFI] QUESTION (score: 1): Author: Gedas <w8bya@mchsi.com>; Date: Wed, 23 Dec 2020 13:55:21 -0500; I would also disconnect the 75-ohm coax that connects up to the modem if you have BB service as that line is hot with all kinds of RF. Gedas, W8BYA EN70JT Gallery at http://w8bya.com Light travels fa; /archives//html/RFI/2020-12/msg00116.html (13,137 bytes)
20. Re: [RFI] QUESTION (score: 1): Author: Gary K9GS <k9gs@gjschwartz.com>; Date: Wed, 23 Dec 2020 13:57:13 -0600; OK.....what is a "BB service"??73,Gary K9GS -- Original message --From: Gedas <w8bya@mchsi.com> Date: 12/23/20 12:57 PM (GMT-06:00) To: rfi@contesting.com Subject: Re: [RFI] QUESTION I would also dis; /archives//html/RFI/2020-12/msg00117.html (13,961 bytes)

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