I don't find that to be the case with my KAT500. Upgraded to 2.05 a
couple of weeks ago. I just ran 80M every 25 kHz from 3.525 to 3.975.
The original memories and a few added show 1.0:1 on my K3S at all
points. The external SWR/PWR meter between the radio and tuner input
agrees. The antenna is resonant at 3.825 MHz and there is a 40M dipole
from the same feed point. There is a 1:1 current balun at the feed
point and the feed line is 75 ft of RG-213.
73
Bob, K4TAX
On 1/2/2022 7:43 PM, elecraft-requ...@mailman.qth.net wrote:
Message: 12
Date: Sun, 2 Jan 2022 11:46:14 -0600
From: Bart Campbell<ns4x.b...@gmail.com>
To: Elecraft Reflector<elecraft@mailman.qth.net>
Subject: [Elecraft]
Message-ID:
<CANZr5j0=jabesua4ptymabrd5ad03rgcdzfhqzohqw-czal...@mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"
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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