Yes, I don't like the way the KAT500 follows RIT changes. Sometimes I cross a stored band slice boundary, the relays click and I know that if I transmit I'll be using the wrong tuning solution. I reported this as a bug back in 2014 [1] but I doubt it will ever get fixed.

Bob NW8L

[1] https://www.mail-archive.com/[email protected]/msg173968.html

On Wed, 21 Aug 2019, Andy Durbin wrote:

" All I do is change RX frequency on the K3S and every thing else follows.  No RF 
required to switch things to the correct configuration for band, frequency and 
antenna."

I think that having the KAT500 follow the K3 RX frequency is a really poor 
system design.  The tuner, and the tuner's frequency dependent antenna 
selection, should follow the transceiver transmit frequency.  Why does it 
matter? Well one day you will transmit with a large difference between TX and 
RX frequencies into the wrong antenna and with the wrong tuning solution.  This 
will fault the KAT500 and/or the KPA500 and could possibly cause damage.

It actually works a lot better if the KAT500 and KPA500 follow the rig TX 
frequency and are properly configured before the transmission starts.

73,
Andy, k3wyc

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