I would emphasize with the K3S and KPA500, if one follows the set-up
EXACTLY as described in the KPA500 manual page 16 & 17, and in the K3S
manual page 29 & 59, all will be well with the EXT ALC engaged.
Anything else will be a PICNIC problem.
I suggest the set-up be done with a 50 ohm resistive dummy load
connected to the amplifier. Therefore any major deviation in output
load will then provide a margin of safety via the ALC. Correctly set-up
one can then observe any excessive drive applied to the amplifier or a
load which exceeds the recommended load range by an indication on the
transceiver ALC indicator. This ONLY applies to the K3S and KPA500 as
described.
73
Bob, K4TAX
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