[Elecraft] Problem with KAT500 firmware v. 2.05

[Wes]

I have had issues with the new FW not finding solutions as well.  I haven't 
really investigated beyond discovering that the input attenuator is not the same 
topography as the schematic and the resistor value isn't either.  I don't know 
whether this is a component failure or not.  On a band or two I've done a better 
job matching manually with the utility program than the tuner algorithm does.  
Don't ask for particulars, I did this in the heat of battle and didn't document 
anything. I may just roll back the FW, even though I too am using a Kenwood.

Wes  N7WS


  On 1/2/2022 10:46 AM, Bart Campbell wrote:
> I upgraded one of my KAT500 tuners to firmware version 2.05.  I had already
> upgraded the KAT500 utility to the current version, so no issues there.
> After the upgrade, the KAT500 is unable to find a tuning solution on my 80
> meter dipole.  My first thought was that there was an issue with the
> dipole, but I checked it with an AA-230 antenna analyzer and there was no
> change from previous measurements.  I then switched the upgraded KAT500
> with another KAT500 that I have which was running firmware version 1.75.
> It found a tuning solution on the dipole just fine, as has always been the
> case with the first KAT500 prior to the firmware upgrade.  So, I
> "downgraded" the updated KAT500 to firmware version 1.75 and it once again
> was able to easily find a tuning solution for the 80 meter dipole.  It
> seems that something in the tuning algorithm was changed in the latest
> firmware that affects the tuner's ability to find a tuning solution on 80
> meters (I did not notice this issue on other bands after I updated the
> firmware, but I concentrated my troubleshooting on the 80 meter dipole).
>
> Any ideas?  I really want to use the latest firmware to take advantage of
> the capability to accept transceiver TX frequency messages in Kenwood
> format.
>
> Bart, NS4X
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