[Elecraft] question about using extenal ATU with KX3

[Don Wilhelm]

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
>