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Re: [Amps] TMC amp toroid tank

To: <garyschafer@comcast.net>, <amps@contesting.com>
Subject: Re: [Amps] TMC amp toroid tank
From: "Tom W8JI" <w8ji@w8ji.com>
Date: Mon, 26 Mar 2007 21:53:55 -0400
List-post: <mailto:amps@contesting.com>
> I could see really killing it if the turns were shorted 
> but this amp uses
> taps on the toroid coil it does not short the turns.

I don't understand that.

Surely at least one end is tied to a tap point!
Let's assume the thing has 20 turns and the 20 MHz tap point 
is at 4 turns. If the 4 turn tap was selected withouit 
shorting the end, you would have a 1:5 voltage step up.

My bet is they may not have a progressively shorting switch 
but they still short a large portion of the unused winding 
when on higher bands.

Shorting one turn or ten, it is a bad ideal in a closed 
core.

73 Tom



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