[Amps] Overdrive protection

[Jerry Kaidor]

Back in the late 70's I had access to some very good test equipment - I
was working as a bench tech in an instrument shop.   I would bring in my
ham rigs to play.  On the spectrum analyzer I would see a fundamental
and a forest of spurii.  Turning down the drive, the fundamental would go
down, and the spurii would generally remain the same.  Thus I came to the
conclusion that for the best cleanliness - in terms of dB - it was best to
run an exciter at or near its rated power.  Maybe that's changed....

                        - Jerry Kaidor, KF6VB