Reason for 3:  Band selection on the K3 is via a BAND+/BAND- switch or via the numeric pad memory channel recall if programmed.  The KPA500 provides band buttons, and if it is located in front of you, simplified band changing ... just push the button.  If a non-Elecraft radio has one-touch band selection, you are correct, #3 isn't a big advantage.

73,

Fred {"Skip"] K6DGW
Sparks NV DM09dn
Washoe County

On 7/15/2018 7:05 PM, ANDY DURBIN wrote:
I'd like to understand all the operational advantages of integrating a K3 with 
a KPA500 and KAT500 that are not available to those who chose to use a TS-590 
instead of a K3.


I know about:


   1.   KPA500 and KAT500 know TX frequency and configure band, antenna, and 
tuning solution before transmitting
   2.  Adjustment of power output is based on band and KPA500 OP/STBY  mode
   3.  Selection of band on KPA500 is passed to K3 and KAT500.


I have developed an Arduino based interface that implements 1.  2 seems to be 
doable and useful.  3 seems doable but not very useful.   What else is there?


Thanks and 73,

Andy k3wyc
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