Good point.
Since we're on the topic, I've seen references to Fair-Rite #31 toriod
cores in various places, but haven't been able to find any in their
catalog. Do they actually exist in the wild? Beads abound, but it would
be nice to be able to build high-impedance chokes in less than several
straight feet of cable.
Thanks,
Jim, N7CXI
Jim Brown wrote:
> On Mon, 25 Jan 2010 22:58:00 -0600, chas wrote:
>
>> ok, micrometals material codes are completely different from Fair-Rite.
>
>> so, what does Fair-Rite #31 = in MMetals?
>> ditto question of F-R #43 = in MMetals??
>
> They are not "different codes." they are VERY DIFFERENT MATERIALS, have
> VERY different properties, and used for different purposes. Micrometals
> makes powered iron, which are primarily used for inductors. Fair-Rite
> makes ferrites, which are used as inductors, transformers, and
> suppressors.
>
> Fair-Rite #43 is a pretty generic VHF suppressor material, and several
> other companies make equivalents. Fair-Rite #31 is a new mix they
> developed about 10 years ago, and as far as I know, hasn't yet been
> copied.
>
>> where is the scientific data on their products, etc?
>
> See their website.
>
> It is CRAZY to go to all this trouble to try to find "generic
> equivalents" to Fair-Rite parts simply because Amidcon and Palomar are
> raping us with their prices. Instead, simply go to industrial
> distributors of Fair-Rite parts and buy them at the right prices, not
> Amidon or Palomar's inflated prices.
>
> 73,
>
> Jim Brown K9YC
>
>
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