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Re: [Amps] grid resonance

To: Ian White GM3SEK <gm3sek@ifwtech.co.uk>
Subject: Re: [Amps] grid resonance
From: Bill Turner <dezrat@copper.net>
Reply-to: dezrat@copper.net
Date: Mon, 07 Aug 2006 09:23:53 -0700
List-post: <mailto:amps@contesting.com>
ORIGINAL MESSAGE:

On Mon, 7 Aug 2006 10:09:32 +0100, you wrote:


>Me neither, because it's so difficult to understand what a dip actually 
>means, except in the very simplest cases.
>
>The GDO is deceptively simple instrument. The trick is to tell when it 
>stops being simple, and starts being deceptive.

------------ REPLY SEPARATOR ------------

A GDO "deceptive". I could not disagree more. Assuming the GDO is
designed properly, what is says is happening really is. 

In all fairness, I have seen one GDO which had its own dip at a
particular frequency, apparently due to a resonance within the meter
itself. Aside from that however, when it shows a dip, there is most
assuredly a parallel resonance present, or at least a circuit which
will absorb power at a particular frequency such as an antenna.

Bill, W6WRT
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