[Elecraft] Problem with KAT500 firmware v. 2.05

[Bart Campbell]

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