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Re: [RFI] CAT 3 Cable?

To: "RFI List" <rfi@contesting.com>
Subject: Re: [RFI] CAT 3 Cable?
From: "Jim Brown" <jim@audiosystemsgroup.com>
Reply-to: Jim Brown <jim@audiosystemsgroup.com>
Date: Sun, 20 Jun 2004 22:42:09 -0500
List-post: <mailto:rfi@contesting.com>

I think it's time to play "I'll show you mine and you show me yours."  Here are 
data for a large Fair Rite clamp-on -- 2" OD, 1" ID, 2" long. 


In each case, the "winding" is the braid of Belden 1800F, a mic cable that is 
roughly 0.21 OD.  Data  were taken at discrete frequencies, and plotted from 
my spreadsheet. This is all small signal data, and there is no d.c. component. 

I have comparable data for large toroids (2.4" OD), solid cylinders, and 
smaller clamp-ons, and they behave similarly.


On Sat, 19 Jun 2004 11:01:43 -0400, Tom Rauch wrote:

>I can also read catalogs, and FairRite corps catalog shows
>31 has a Q=1 at about 3MHz. 44 material, the most common now
>for snap-on beads from many sources, has Q=1 at 20MHz. 43
>material has Q=1 at 10MHz, and has noticeably less impedance
>per unit length of core against the conductor.

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