[600MRG] FT-37-WC toroid

[Roger Graves]

Hi Paul,

Fair-Rite makes what used to be sold by Amidon I believe.
Their material datasheet https://fair-rite.com/materials/ shows u=10,000 to be their type 76 mix.
For part numbers/sizes see https://fair-rite.com/product-category/inductive-components/toroids/
Digi-key and Mouser sell them, but only certain mix/sizes, so you have to sort for what might work.

73,
Roger

> On Nov 20, 2024, at 6:00 AM, Paul N1BUG FN55mf <paul at n1bug.com> wrote:
> 
> Hey folks,
> 
> I am experimenting with MF and LF again.
> 
> I'm trying to source a few FT-37-WC toroids. They are .375 inch or
> 9.53mm OD, W material, epoxy coated. The only reference to such a part I
> can find is Amidon. Of course FT-37-WC would not be what the
> manufacturer calls these. Amidon prices and minimum order are currently
> prohibitive. I would like to get the exact part if possible since I have
> tested and know they work well in my application. Failing that I would
> try a substitute, but I am unable to find permeability for "W" material.
> Can anyone help unravel what these are, who makes them, possible
> substitutes or sources in very small quantity?
> 
> 73,
> Paul N1BUG
> 
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