> There are two kinds of ALC and I think Roger is talking about the kind
> of ALC that is fed back from the amplifier to the transceiver. With
> that kind, I fully agree with the above.
> But there is also ALC that is generated entirely within the
> transceiver (such as my IC-756Pro3), and is completely independent of
> the amplifier. With that kind you can safely use ALC to limit the
> drive and it does an excellent job, I might add.
> And if you use the internal type of ALC, you don't need the fed-back
> kind at all.
The short coming to the "internal type of ALC" is that is doesn't take into
account anything occurring in the subsequent amplifier/s. This could include
the screen current of tetrode and pentode tubes, especially while tuning.
--
Ron KA4INM - He who attacks the fundamentals of the American broadcasting
industry
attacks democracy itself. -- William S. Paley,
chairman of CBS
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