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Re: [Amps] GS35B tuned input

To: <amps@contesting.com>
Subject: Re: [Amps] GS35B tuned input
From: "Bill, W6WRT" <dezrat1242@yahoo.com>
Reply-to: dezrat1242@yahoo.com
Date: Wed, 24 Feb 2010 10:30:37 -0800
List-post: <amps@contesting.com">mailto:amps@contesting.com>
ORIGINAL MESSAGE:

On Tue, 23 Feb 2010 06:19:20 -0800, "Jim Thomson" <Jim.thom@telus.net>
wrote:

>###  a Pi net IS a LP filter.  Are you sure low Q promotes instability ??

REPLY:

I am sure in the case of a simple parallel resonant circuit. A pi-net,
I don't know. Have not tried one at high Q. 

An 8877 is an excellent candidate for a simple parallel resonant
circuit since its input impedance is very close to 50 ohms anyway.
Likewise for a pair of 3-500Zs. (115 ohms for a single, 57.5 for a
pair). 

73, Bill W6WRT
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