Amazon has access to many toroids.  If you know the suffix number on the -37 size you can buy 10 or so for maybe $10 or so.  They may vary a bit, but most ferrites aren't frequency  dependent as far as exact inductance so....

N0UU

On Wednesday, November 20, 2024 at 01:35:12 PM CST, Dana Myers via 600MRG <[email protected]> wrote:


On 11/20/2024 7:36 AM, Roger Graves wrote:
> Hi Paul,
>
> Fair-Rite makes what used to be sold by Amidon I believe.

35 years ago, I lived in the San Fernando Valley and realized I was just a few miles from
the Amidon Associates address, they were happy to will-call items. It was, in fact, a
family business run out of their garage. One of the daughters confirmed they sourced
from several manufacturers, including Fair-Right, Ferroxcube and maybe another I
don't recall.

One of my valued items from those days is their extended catalog in booklet form,
with extensive test data. Still refer to it!

73,
Dana  K6JQ


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