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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