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1. [WriteLog] RFI (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Tue, 02 Dec 2003 11:08:18 -0600; I would avoid the shielded CAT5 cable. A mechanism called shield current induced noise will convert shield current to voltage on the "balanced" pair. On the other hand, a better grade of CAT cable li; /archives//html/WriteLog/2003-12/msg00057.html (9,874 bytes)
2. Re: [WriteLog] RFI (score: 1): Author: Bob Naumann - N5NJ <n5nj@gte.net>; Date: Tue, 2 Dec 2003 11:22:14 -0600; Nice tutorial Jim - thanks! I have some more empirical evidence rather than scientific, but at the V26B station in Antigua, we ran some regular CAT 5 cables all around the shack, used a cheap 10Mb hu; /archives//html/WriteLog/2003-12/msg00058.html (7,203 bytes)
3. RE: [WriteLog] RFI (score: 1): Author: "Barry Merrill" <barry@mxg.com>; Date: Tue, 2 Dec 2003 11:25:22 -0600; I completely disagree with your claim: "The ferrite chokes ARE a good idea, but not necessarily on the network cables. For HF, you need a lot of turns around one of the bigger toroids commonly used f; /archives//html/WriteLog/2003-12/msg00059.html (7,999 bytes)
4. Re: [WriteLog] RFI (score: 1): Author: K4SB <k4sb@earthlink.net>; Date: Tue, 02 Dec 2003 17:28:56 +0000; Well, I hope this doesn't put be wearing a dunce cap in the corner, but I would like to shorten the cables from my 2 monitors. They're about 6' long, and I only need less than 2 feet from the most di; /archives//html/WriteLog/2003-12/msg00060.html (7,221 bytes)
5. Re: [WriteLog] RFI (score: 1): Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>; Date: Tue, 2 Dec 2003 18:08:19 +0000; Barry Merrill wrote: I completely disagree with your claim: "The ferrite chokes ARE a good idea, but not necessarily on the network cables. For HF, you need a lot of turns around one of the bigger to; /archives//html/WriteLog/2003-12/msg00062.html (9,689 bytes)
6. RE: [WriteLog] RFI (score: 1): Author: "Joe Subich, K4IK" <k4ik@subich.com>; Date: Tue, 2 Dec 2003 13:32:55 -0500; I don't know that they're exactly contradictory ... network cards can create a "pin 1" problem. There is no shield, several wires are left floating and unbalanced RF is free to find its own way to a; /archives//html/WriteLog/2003-12/msg00063.html (7,967 bytes)
7. RE: [WriteLog] RFI (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Tue, 02 Dec 2003 12:33:08 -0600; Five snap-on ferrites is the equivalent of several turns around a typical toroid of the same material. What works will depend on how severe the interference is, what frequency you're trying to elimin; /archives//html/WriteLog/2003-12/msg00064.html (9,299 bytes)
8. RE: [WriteLog] RFI (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Tue, 02 Dec 2003 12:39:12 -0600; Sure. The dominant mechanism for unintended detection is the square law response of a semiconductor junction. Over the last year or so, I've done considerable research on RFI into audio systems, and; /archives//html/WriteLog/2003-12/msg00065.html (7,677 bytes)
9. RE: [WriteLog] RFI (score: 1): Author: "Jim Brown" <jim@audiosystemsgroup.com>; Date: Tue, 02 Dec 2003 12:51:07 -0600; Not a pin 1 problem, but a different one. The network card is balanced with no shield. If either the driver or the input is poorly balanced, there can be a common mode problem. Also ,some input trans; /archives//html/WriteLog/2003-12/msg00066.html (8,733 bytes)
10. [WriteLog] RFI (score: 1): Author: "Peter Barron" <ve3pn@igs.net>; Date: Thu, 4 Dec 2003 08:11:48 -0000; Hi All The best things I bought some time ago at a company sell off was several boxes of ferrites etc These were Manufacturers Design Kits The following may be useful for clubs / groups etc 1 Fair-Ri; /archives//html/WriteLog/2003-12/msg00081.html (7,629 bytes)

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