On the question of tuning for Dip versus tuning for maximum output, let me
offer a few words of, I hope, wisdom.
First, the additional amount of power output that might be obtained by
operating the rig "off dip" is so little that it will make absolutely no
difference at the receiving end.
Second, you are very likely increasing the total amount of power dissipated in
the final amplifier tubes by operating "off dip," and you are pulling more
current from the tube cathodes as well. Both will contribute to degrading the
amplifier tubes' life. Considering what replacement tubes cost these days, you
probably don't want to shorten the life of your existing tubes in order to get
a few watts more output from them.
You would probably be better advised to run the amplifier at somewhat less than
full, ICAS class C ratings, that is to back off the fully loaded plate current
a bit. You would lose at most one or two dB on the other fellow's S-meter, and
you would add considerably to the life of your tubes.
Jim Hanlon, W8KGI
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