On 6/21/2025 12:06 PM, Eckhart via Elecraft wrote:
Hello
I aquired a used KAT500 for use with ma K3S/KPA500.
Even after a software update the tuner will not allow a changing of the
antenna. It stays on ant1.
The same, when operating from the utility.
Any ideas what this may be?
Broken. Or configured for only one antenna. With power applied to the
KAT500, pressing the ANT switch should cycle it through the available
antennas.
I believe the KAT500 utility allows you to select how many antennas are
active. (Unfortunately, my KAT500 needs an FET replaced on the serial
port, so I can't connect to the Utility now.)
I have only one antenna plus a dummy load, so the ANT switch cycles
between 1 and 2.
Perhaps yours is configured for only one antenna.
73, Mike N4CF
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