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Re: [Amps] 4-1000A neutralization

To: <Amps@contesting.com>
Subject: Re: [Amps] 4-1000A neutralization
From: "Bill, W6WRT" <dezrat1242@yahoo.com>
Reply-to: dezrat1242@yahoo.com
Date: Fri, 04 Sep 2009 09:33:09 -0700
List-post: <amps@contesting.com">mailto:amps@contesting.com>
ORIGINAL MESSAGE:

On Fri, 4 Sep 2009 09:52:38 -0500, "Robert Perdue" <kc0hfl@cox.net> wrote:

> no tuned input
>may have to add later.

REPLY:

I would add that now. That will greatly reduce the input impedance at VHF and
may be all you need to stop the oscillation. A simple LC parallel resonant tank
with a Q of three or more should do it. If you want to get a bit fancier, a
pi-network would allow exact impedance matching, but with just the simple LC
your input impedance won't be far from 50 ohms anyway. 

73, Bill W6WRT
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