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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