"if I switch the KPA500 with the band buttons to another band I would expect 
the KAT500 to follow the last tune settings on the new band. However this is 
not the case, the tuner switches to the new band settings only when HF goes 
through. The 15-p cable is connected and there is no K3 connected. Is there a 
menu setting to let the KAT500 follow the KPA500?"

I think you question has been answered but just for clarification -  The KAT500 
needs to know frequency not band.  Even if the KPA500 was sending band info to 
the KAT500 it wouldn't be much use because KAT500 antenna and tuning solution 
selection is based on frequency not band.

Having the KPA500 and KAT500 tune before transmit requires something to send TX 
band data to KPA500 and TX frequency data to KAT500.   Following Kenwood FA is 
a weak (in my opinion hopelessly unsatisfactory) solution since split operation 
usually has VFO B as the TX VFO.

Elecraft has been asked to revise the KAT500 firmware so it properly extracts 
TX frequency from IF, FA, and FB just like KPA500 and KPA1500 do.  I don't know 
when/if that update will be available.

73,
Andy, k3wyc


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