[Elecraft] K2 / KPA ALC problem. Are power levels sensed at the same point?

[Chris Kimball]

Thanks for the reply.

The setup is a K2 with a KAT2 tuner feeding a KPA-100/KAT-100 in a separate
enclosure. The connection is from Ant 1 of the K2 KAT2 to the BNC input of
the KAT-100.   The internal wiring of the KPA-100/KAT-100 routes this to the
amplifier input in the usual way for this conglomeration("Remoting the
KPA100 into the EC2 enclosure", kk7p.com).

The KPA-100 is fully up-to-date as of Rev A-2 Nov 13, 2006.  The upgrades
were made in March, 2012, and I remember that the bias setting went as
planned.  Since I don't have a wattmeter, no adjustment of the wattmeter
balance or calibration was made with the upgrade.  Since the upgrade
involved a lot of component changes, this could be the problem!

Would an incorrectly set KPA-100 power meter lead to the observed
differences in ALC response between low and high power settings?

Thanks,

Chris







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