[Elecraft] KXAT3 Memory

[Don Wilhelm]

John,

Check the ATU menu setting - it should be set to AUTO.
As another thought, are you connected to the computer running software 
that could possibly issuing a [CLR] command?  That will reset the ATU 
memory for whichever band you are operating on.
Think about anything you might have added/changed since it performed 
properly in the past.

73,
Don W3FPR

On 12/5/2015 8:27 PM, John Maass wrote:
> ​My KXAT3 internal antenna tuner clicks and finds a match for my KX3. It
> has been an intelligent and flawless work horse for using my doublet on all
> HF bands, 450-ohm line, 4:1 balun, and short coax, good reports, fine DX.
> However, it now appears to be failing to remember settings. It began by
> needing resetting upon band changes. Then it began needing resetting
> within band. Then needing resetting upon even small changes in VFO
> frequency. Now it has taken to not holding a setting at all. Upon
> transmitting, antenna SWR will go high. Tapping ATU TUNE again will begin a
> new matching process. And, again, SWR goes high upon transmitting. Have any
> of you experienced this? Have any of you a known remedy? I have begun tests
> with an imperfect dummy load (a 15-watt light bulb). The KXAT3 will bring
> the light bulb's SWR of 3.3:1 down to 1.5:1. When transmitting, SWR reverts
> to 3.3:1.
>
> John, K7JKZ
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