I am seeing an approx. 20% reduction of peak SSB power after pressing ATU
TUNE. This occurs at both 50 and 100 watts into a high-quality dummy load
as indicated on the K3 RF bar display and my external LP-100A wattmeter.
Bypassing the ATU does not restore the peak power, so I don't think it's
Chuck, I had a quite similar problem. My K3 was qrp waiting for the KPA3.
When pushing tune I had full power (12W). Talking SSB I had full 12W but
when I touched the power knob, even reducing 0.1W caused the power to drop
to 8W peak. I had to retune to resume full power. I checked the LPA twice
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