I have noticed that some amplifier manufactuers discuss "exciter overshoot"
in their operating manuals. Apparently some exciters at the moment of
initial RF keydown will for a split fraction of a second put out full power
regardless of the RF setting on the exciter, and even a split second burst of
power
beyond 100 watts. It is a known fact that a bandswitch or a tuning capacitor
arc can occur if too much drive is applied with too light loading to the
amplifier. I know that Alpha amps respond very quickly to sudden spikes in
overdrive. One ham I know had a major problem with his Alpha amp using an
Icom
exciter. Could some bandswitch and tuning capacitor arcs be attributed to
exciter overshoot? I know from personal experince that some of the arcs I
have
seen occured when the initial drive from the exciter was applied. THE
QUESTION IS..............
Has anyone measured exciter overshoot? It would have to be done with a
scope I am sure since a meter would never react that fast to see it.
Lou W1QJ
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