- 121. Re: [RFI] Computer cases and RFI (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Tue, 03 Jan 2006 04:19:48 -0600
- It would be quite nice if that were true, and for the computers themselves, it very well may be. But computers are a tiny fraction of the equipment that generates trash for us. There are power suppli
- /archives//html/RFI/2006-01/msg00021.html (8,043 bytes)
- 122. Re: [RFI] Fw: Re: Ferrite Beads (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Thu, 05 Jan 2006 11:01:01 -0600
- I suspect they are using them because I published all my info about the new mix. Yes. Expect to pay < $4 for the toroids from a distributor. The first price break is at 250 pieces. It won't be called
- /archives//html/RFI/2006-01/msg00025.html (19,550 bytes)
- 123. [RFI] Experience With this Flexible Raceway (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Tue, 10 Jan 2006 17:05:26 -0600
- I've got an application for "liquid tight" flexible raceway to shield outdoor low voltage wiring that is known to radiate RF trash and be picked up by my HF and VHF antennas (160 meters through 2 met
- /archives//html/RFI/2006-01/msg00040.html (6,963 bytes)
- 124. Re: [Amps] new mobile amps from THP (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Wed, 11 Jan 2006 09:06:38 -0600
- YES! I just put a 100w HF transceiver in my 2006 Toyota Sequoia and drive to CA with it. Power straight from the battery, antenna a Hamstick on the luggage rack, shield of coax bonded to a big bolt h
- /archives//html/RFI/2006-01/msg00043.html (9,016 bytes)
- 125. Re: [RFI] Mobile amps and vehicle issues (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Wed, 11 Jan 2006 12:39:54 -0600
- Of course. But there is no excuse for poor wiring practices, or for not bonding the body, for omitting ferrites at sensitive points in the circuit, or for designing those very complex systems with pi
- /archives//html/RFI/2006-01/msg00049.html (7,479 bytes)
- 126. Re: [RFI] Mobile amps and vehicle issues (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Thu, 12 Jan 2006 10:26:04 -0600
- <SNIP> I agree completely, BUT the commonly accepted definition of "an order of magnitude" is a decade of frequency -- 10:1. The difference between the 20 meter band and public safety frequencies at
- /archives//html/RFI/2006-01/msg00058.html (8,814 bytes)
- 127. Re: [RFI] Mobile amps and vehicle issues (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Thu, 12 Jan 2006 13:08:14 -0600
- Yes. My Volvo S80 received NO RFI from my 100w HF rigs, and was moderately quiet with NO filtering at all by me. If I hadn't given it to my XYL's daughter, I would have dug in and cleaned some of the
- /archives//html/RFI/2006-01/msg00062.html (9,959 bytes)
- 128. Re: [RFI] Tv interference (score: 1)
- Author: "Jim Brown" <jim@audiosystemsgroup.com>
- Date: Thu, 19 Jan 2006 12:58:51 -0600
- If the product is used at home, shouldn't it carry a sticker saying that complies with FCC Part 15 as a Class B device? Does it have that sticker? If the manufacturer won't fix the RFI, it might be w
- /archives//html/RFI/2006-01/msg00083.html (7,542 bytes)
- 129. 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)
- 130. 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)
- 131. 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)
- 132. 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)
- 133. 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)
- 134. 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)
- 135. 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)
- 136. 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)
- 137. 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)
- 138. 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)
- 139. 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)
- 140. 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)
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