Topband: Ferrite Cores

[Tom W8JI]

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 at msn.com>
To: <topband at 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 at waveform.net
>> To: jim at audiosystemsgroup.com; topband at 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 at contesting.com] On Behalf Of Jim
>> > Brown
>> > Sent: Tuesday, August 05, 2014 12:25 PM
>> > To: topband at 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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