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[Amps] HF amp output power dropping

To: amps@contesting.com
Subject: [Amps] HF amp output power dropping
From: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>
Reply-to: g3rzp@g3rzp.wanadoo.co.uk
Date: Mon, 8 Oct 2007 06:25:33 +0200 (CEST)
List-post: <mailto:amps@contesting.com>
>The more drive I give it, the higher the filament voltage 
rises. Used to always drop under load.<
Presumably measured in the same way with the same meter - and not a DVM 
affected by RF?
How does the input SWR  of the amp change while this is going on?
Which bands does it happen on - all of them?
>What ALL the meters do, including grid current and exciter 
SWR, will tell you a great deal. Without knowing what the 
meters do all people can do is guess, and that isn't very 
productive.
<
Agreed
73
Peter G3RZP
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