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Re: [Amps] Input tuning

To: "Jeff Wilaby" <jwill@chartermi.net>
Subject: Re: [Amps] Input tuning
From: "R; Measures" <r@somis.org>
Date: Sat, 29 Apr 2006 08:25:58 -0700
List-post: <mailto:amps@contesting.com>
On Apr 29, 2006, at 8:04 AM, Jeff Wilaby wrote:

>    Hi everybody,
>
> I'm building an amp using a pair of 4-400's in a grounded grid
> configuration. I was wondering about the input tuning and what the  
> best way
> of approaching it.

Make the reactance of C-in 25-ohms on each band if u want a low swr  
input.

> I have heard of using everything from a 50 ohm swamping
> resistor

For AB1, a grid-swamping R is needed.

> to an internal auto tuner. As this amp is in the planning stage, I
> thought I'd post the question to the reflector.
>
> Thanks and 73s in advance, Jeff   KA0ZYD
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