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Re: [Amps] Plate Load Calc.

To: amps@contesting.com
Subject: Re: [Amps] Plate Load Calc.
From: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>
Reply-to: g3rzp@g3rzp.wanadoo.co.uk
Date: Sat, 3 Mar 2007 10:50:00 +0100 (CET)
List-post: <mailto:amps@contesting.com>
Tom said:
>If you get the Q too low the loading control will work 
backwards. If you get it too high the tuning will be 
needlessly sharp and there will be a little more tank heat.<
Another problem if the Q gets too low is that the harmonic output tends to 
start rising. If Q gets extremely low, there can be enoguh harmonic that the 
apparent SWR rises, since the antenna isn't matched at the harmonic and so the 
SWR meter sees reflected energy at that frequency. I once saw it happen in a 
bodged installation where they tried to pull the tx a long way LF outisde its 
real frequency range.
73
Peter G3RZP
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