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Date: Wed, 11 Nov 2009 16:20:55 +0000
From: Peter Dodd <g3ldo@ukonline.co.uk>
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Hi Clemens,
That little program is really brilliant and is just what I wanted.
Thank very much and to the others who have replied regarding this subject.

Regards

Peter, G3LDO



> the best aid I know is the mini Ring Core Calculator V1.2
> which is freeware
> http://www.dl5swb.de/html/mini_ring_core_calculator.htm
>
> It is a fantastic tool  for known and unknown toroid materials.
> For determining the µrel of an unknown toroid you wind a few turns
> on it,measure the inductance,enter the inductance and the physical
> dimensions of the core into the program and it gives you all  you want
> to know including µrel.
> And the results are really correct.
> Very handy with Amidon toroids,too.
>