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201. Re: [RFI] Tv interference (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Sat, 21 Jan 2006 11:19:53 -0600; Thanks, Tim. More of the best (small) government that (big) money can buy. Doncha just love it? Jim Brown K9YC _______________________________________________ RFI mailing list RFI@contesting.com http; /archives//html/RFI/2006-01/msg00092.html (7,573 bytes)
202. Re: [RFI] TVI on Infrared Headset (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Thu, 26 Jan 2006 19:13:17 -0600; Iit is most likely a pin 1 problem at the connection between the infrared transmitter and the audio source, and the fault could lie either with the audio source or the infrared headset, or even both.; /archives//html/RFI/2006-01/msg00110.html (6,839 bytes)
203. Re: [RFI] TVI on Infrared Headset (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Fri, 27 Jan 2006 03:03:31 -0600; No. I have not tested. The work published on my website is the result of three years of research, and a lot more experience. Testing these systems and reporting back to us can be your contribution. :; /archives//html/RFI/2006-01/msg00112.html (6,926 bytes)
204. Re: [RFI] Fw: cell phone interference on airplanes (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Thu, 02 Mar 2006 22:00:17 -0600; Interesting. Has anyone seen this IEEE Spectrum piece? It is my understanding that there is a lack of peer review by the editors of IEEE Spectrum, and that "studies" with less that solid basis have b; /archives//html/RFI/2006-03/msg00013.html (8,821 bytes)
205. Re: [RFI] RFI Canceling RFI? (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Fri, 10 Mar 2006 07:52:50 -0600; Not speaking of your problem or the original post directly, but there are some power wiring errors that could account for the sort of results being described. Consider outlets or fixtures that are mi; /archives//html/RFI/2006-03/msg00036.html (9,640 bytes)
206. Re: [RFI] F-240 Ferrite Core source? (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Mon, 13 Mar 2006 03:34:10 -0600; come in the new 31 mix? www.fair-rite.com is the mfr. Click on their link to distributors. Be prepared to buy 20 or more for a minimum purchase, but at 1/3 the price of Amidon. Jim K9YC _____________; /archives//html/RFI/2006-03/msg00044.html (7,277 bytes)
207. Re: [RFI] Power line or ? noise (score: 1): Author: "Mike Brown" <k9mi@sbcglobal.net>; Date: Sun, 16 Apr 2006 19:08:00 -0000; Dana, I'll trade you. I have 15 over noise on 10m, around 10 over on 15 meters and S9 on 20 meters. I've had this for 8 months, the ARRL is involved, but I don't know where I stand now. The location; /archives//html/RFI/2006-04/msg00003.html (14,114 bytes)
208. Re: [RFI] Power line or ? noise (score: 1): Author: "Mike Brown" <k9mi@sbcglobal.net>; Date: Sun, 16 Apr 2006 21:51:48 -0000; Rod, I think I'd have to move ! 73, Mike K9MI _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi; /archives//html/RFI/2006-04/msg00005.html (7,549 bytes)
209. Re: [RFI] Great Article on Common Mode Chokes (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Sun, 23 Apr 2006 21:51:28 -0700; Yes, this is good stuff. Also, see the piece I wrote last year. While its emphasis is audio, the discussion and data apply directly to ham radio appications. http://audiosystemsgroup.com/SAC0305Ferri; /archives//html/RFI/2006-04/msg00015.html (8,066 bytes)
210. Re: [RFI] ignition noise (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Thu, 27 Apr 2006 12:09:26 -0700; Don't count on that working in a Toyota -- the body in my Toyota Sequoia is an unmitigated disaster as a "ground" -- virtually all body to body (and even wiring to body) contacts have paint in the wa; /archives//html/RFI/2006-04/msg00022.html (7,216 bytes)
211. Re: [RFI] UPS interference/Recommendation Request (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Fri, 28 Apr 2006 14:14:58 -0700; There is no excuse for this behavior -- send it back for FULL credit, and advise the FCC of the apparent non-compliance with Part 15. If the vendor gives you grief or wants to charge you for restocki; /archives//html/RFI/2006-04/msg00025.html (7,321 bytes)
212. Re: [RFI] Fan Noise on Repeater (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Tue, 09 May 2006 05:37:08 -0700; I think you missed one critical sentence in Stu's excellent post. I'll repeat it. "A few questions for you to help better understand the problem" These are questions for YOU to think about -- they fo; /archives//html/RFI/2006-05/msg00003.html (7,217 bytes)
213. Re: [RFI] Defibrillator and RF Exposure Query (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Wed, 10 May 2006 03:49:20 -0700; An important part of any mechanism for RF getting into a device is the length of any conductors that could function as receiving antennas within the device (or connected to it) as a function of the w; /archives//html/RFI/2006-05/msg00016.html (8,506 bytes)
214. Re: [RFI] Defibrillator and RF Exposure Query (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Sun, 14 May 2006 20:38:38 -0700; operate The receiving antenna (within the subject wired with the electronic device) needs to be a significant fraction of a wavelength to receive significant voltage from the transmitting antenna. So; /archives//html/RFI/2006-05/msg00021.html (8,793 bytes)
215. Re: [RFI] RF Quiet Laptop for Mobile Console? (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Mon, 22 May 2006 07:51:40 -0700; Most ham gear is shielded, and radiates little RF trash. It's the antennas that have the potential for problems. My IBM T22 and T41 work quite nicely from a Targus 12v universal power supply that I b; /archives//html/RFI/2006-05/msg00033.html (10,402 bytes)
216. Re: [RFI] Power line Noise (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Wed, 07 Jun 2006 14:02:06 -0700; How does this relate to what I've heard about arcing at insulators due to humidity or corona discharge varying with weather conditions (which in some parts of the world vary with the time of day)? Ji; /archives//html/RFI/2006-06/msg00009.html (7,199 bytes)
217. Re: [RFI] Power line Noise (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Thu, 08 Jun 2006 16:28:44 -0700; Yes, but I suspect that propagation is USUALLY less of an issue because the sources are usually too close to the victim to be affected by weather-related changes in propagation. That is, weather-rela; /archives//html/RFI/2006-06/msg00021.html (8,876 bytes)
218. [RFI] Technical Paper on Ferrites (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Thu, 15 Jun 2006 13:03:21 -0700; The paper I presented at the NY AES last fall is now on my website for free download. http://audiosystemsgroup.com/AESPaperFerritesASGWeb.pdf Jim Brown K9YC __________________________________________; /archives//html/RFI/2006-06/msg00027.html (6,444 bytes)
219. Re: [RFI] second floor grounding (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Sun, 30 Jul 2006 13:29:09 -0700; There are several tutorials on my website that should help you understand the issues. http://audiosystemsgroup.com/publish Start with a careful study the "Power and Grounding" tutorial as background.; /archives//html/RFI/2006-07/msg00025.html (7,165 bytes)
220. Re: [RFI] Ambient Noise Levels (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Tue, 08 Aug 2006 22:45:48 -0700; I agree with Tom -- it's noise from far away, propagated just like any other RF signal. When 6M is open, for example, I hear birdies that I don't hear when it isn't. And during a major blackout not l; /archives//html/RFI/2006-08/msg00006.html (7,094 bytes)

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