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Re: [Amps] 813 efficiency

To: amps@contesting.com
Subject: Re: [Amps] 813 efficiency
From: peter chadwick <g8on@fsmail.net>
Reply-to: g8on@fsmail.net
Date: Tue, 26 Feb 2013 20:55:37 +0100
List-post: <amps@contesting.com">mailto:amps@contesting.com>
Carl,
>The 813 was way underated as are many other tubes of that era, my own use of 
them over decades indicates an ICAS Pd of 200-250W is more realistic and use 
a little air on the glass. I show just a little color on SSB voice peaks at 
1200W for 4 tubes. On CW in a contest enviroment there is a fairly steady 
dark red<
I'd agree about the carbon anode ones, but does that really apply to the metal 
anode ones?
73
Peter G3RZP
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