[Elecraft] Different SWR on K3 and External Meter

[John W2XS]

My issue was similar, but with the 50 watt calibration. A recent firmware
upgrade required a 5W and 50W re-calibration. I hadn't done a calibration
since the early days of the radio back in 2008. The radio has worked fine
all this time. It is on almost every day.

With the tuner in bypass, I failed the 50 watt calibration on 52 MHz with an
SWR >2 to 1.  I finally got the calibration to pass by connecting the dummy
load directly to the K3 antenna connector, without the cable. The SWR was
still not 1 to 1 on 6 meters, but it was low enough to pass the calibration.

I chalked it up to a tuner-bypass issue on that band. But I never went back
to take a closer look. I seem to have a lot of RF in the shack on 6 meters
now with my center-fed zepp.  Perhaps better station grounding would help in
that area.

73,  John W2XS



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