[RFI] CAT 3 Cable?

[Jim Brown]

Tom,

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. 

http://audiosystemsgroup.com/BiggestClampZ.jpg
http://audiosystemsgroup.com/BiggestClampR.jpg

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.

Jim

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.