I have seen distributors of core mix cores many times over the years. This
includes distributors on the "only approved list". This is why I always
verify cores I use.
As for Fair Rite being the only legitimate source of part numbers, and
everyone else being a criminal or trying to rip people off,
that's pretty silly. Every place I have worked since 1966 has used internal
house numbers for parts. They didn't do that for any sinister criminal or
immoral motives.
We need to lighten up a little. We sometimes sound like the grumpy
opinionated old men we used to be scared of.
----- Original Message -----
From: "Chuck Hutton" <charlesh3@msn.com>
To: <topband@contesting.com>
Sent: Tuesday, August 05, 2014 2:51 PM
Subject: Re: Topband: Ferrite Cores
Neither do I. It's quite common practice for distributors to have their
own part numbers. Witness DigiKey - here is their ferrite page :
http://www.digikey.com/product-search/en/inductors-coils-chokes/inductor-ferrite-cores/197937
Yes, Amidon has always seemed a bit high priced. However, I'd like to see
some numbers rather than an opinionated post.
Chuck
From: billw@waveform.net
To: jim@audiosystemsgroup.com; topband@contesting.com
Date: Tue, 5 Aug 2014 18:34:39 +0000
Subject: Re: Topband: Ferrite Cores
I don't think it was entirely a "scam" on the part of Amidon. When you
think about it, FT-240-31 is easier to know "Ferrite, Toroid, 2.4" OD
material #31" is a lot easier to remember than "2631803802" :-) Similar
in concept to using channel numbers for TV instead of frequency
assignments -- it makes it easier on the users/viewers.
-Bill
> -----Original Message-----
> From: Topband [mailto:topband-bounces@contesting.com] On Behalf Of Jim
> Brown
> Sent: Tuesday, August 05, 2014 12:25 PM
> To: topband@contesting.com
> Subject: Re: Topband: Ferrite Cores
>
> On 8/5/2014 7:46 AM, Greg wrote:
> > The Mouser part picture does not look like a FT-240-31.
>
> The FT-series of part numbers are PHONY part numbers, dreamed up many
> years ago by vendors who have sold them to hams for very high prices.
> The ACTUAL part number for a #31 2.4-in o.d. toroid, as defined by
> Fair-Rite,
> the company that MAKES these parts, is 2631803802. You will find that
> part
> number in Appendix One of my tutorial. Kits and Parts is one of those
> high
> price vendors. Amidon may have been the originator of this scam.
> Palomar
> and DXE are in that league as well. They created these phony baloney
> numbers so that you wouldn't find the part from a real industrial
> vendor at
> one third the price.
>
> 73, Jim K9YC
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