Dick W0ID wrote:
> How can excessively-high plate load impedance occur? Most likely
> (a) because the operator sets up loading much too lightly
> (b) by trying to tune up on a new band at full drive without > presetting
> the load cap;
> (c) by having the amp & antenna on different bands, resulting in
> very high VSWR;
> (d) due to any other occurrence that results in very high VSWR
> (damaged antenna, open or shorted feedline or connector, etc.)
Hello Dick,
Would you expect damage in an amplifier, when the operator changes the
transceiver and antenna to a new band, but neglects to
alter the band change switch in the amplifier?
One of my guest operators did this in a contest. He altered the
TUNE and LOAD to correspond to the positions on a card for the new
band, but left the band chnge switch on the old band.
(He did not get invited back).
Regards,
Martin ZL1ANJ
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