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Re: Topband: T-200 vs. T-300

To: ZR <>
Subject: Re: Topband: T-200 vs. T-300
From: Guy Olinger K2AV <>
Date: Thu, 15 Dec 2011 17:52:37 -0500
List-post: <">>
You may be right that Micrometals makes most of that stuff and sources
Amidon. But these are the individual company product numbers and you have
to use the company's own product numbers to order stuff from that given
company. You would need to take up Amidon's nomenclature choices with

Personally I am more annoyed that Amidon uses a different A sub L number
scheme than the rest of the world and has their own unique set of formulas.
 Anyone knows how that came about, that would be interesting to know.   73,

On Thu, Dec 15, 2011 at 3:44 PM, ZR <> wrote:

> There is no such thing as an Amidon T-300 or any other toroid. In this
> case they are just a reseller of Micrometals powered iron products.
> Carl
> KM1H
> ----- Original Message ----- From: "Guy Olinger K2AV" <
> To: "Martin" <>
> Cc: <>
> Sent: Thursday, December 15, 2011 2:39 PM
> Subject: Re: Topband: T-200 vs. T-300
>> The Amidon T300A-2 can be replaced with a stacked PAIR of Amidon T300-2,
>> with a SINGLE Micrometals T300-2D, or a stacked PAIR of Micrometals
>> T300-2.
>> You can find the Micrometals cores on eBay.  You CAN use the Amidon
>> T400A-2, but that core is forty bux compared to the T300A-2's sixteen, and
>> I haven't figured the correct smaller number of turns to balance the FCP,
>> and since the T300A-2 does the job, why bother to blow 24 bux?  Maybe for
>> 5kW RF someone needs to do the work.
UR RST IS ... ... ..9 QSB QSB - hw? BK

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