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[TowerTalk] Identifying ferrite core material

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Subject: [TowerTalk] Identifying ferrite core material
From: (Richard Karlquist)
Date: Fri Mar 14 11:23:03 2003
> I've managed to lay my hands on some ferrite cores.
> They were used to 'screen' multi-core
> computer/communication cables.
> There are no markings.
> How can I work out what they are made of and what
> their permeability is ?  
> Robert

99% of the time, these things are Fair-Rite 43
or equivalent.  The permeability is 1000 up to
about a MHz, then they become mostly resistive.

Rick Karlquist    N6RK > 
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