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.
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