Julie,
I don't think there is anything with the KX3 that would cause that
difficulty.
However, I do suspect a problem with the LDG auto-tuner or in the
antenna system somewhere.
I would suggest that you attempt a TUNE on 20 meters and then use the
antenna analyzer to determine the SWR into the KX3 side of the tuner
(you could just look at the SWR reported by the KX3, but the antenna
analyzer will give you a sanity check on the KX3 indication). If the
tuner was not capable of tuning to a low SWR, you can conclude that
there is a problem with the tuner or the antenna/feedline.
OTOH, if the SWR is low and the KX3 cannot operate into that low SWR
load, that would indicate a KX3 problem - try the KX3 into a dummy load
and see if it operates properly.
73,
Don W3FPR
On 10/6/2013 5:01 PM, Julie Royster wrote:
Smart folks, we have been using our KX3 fine with an LDG auto-tuner. Today,
mysteriously, it fails to tune only the 20-meter band. We checked the
antenna with SWR meter and it seems the same as previously. The other bands
tune fine as before.
QUESTION: is there some setting on the KX3 we could inadvertently have
changed that could cause this to occur?
THANKS for any input or ideas I can investigate!
Julie KT4JR
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