[Elecraft] KPA1500 Using Multiple Antennas With the Tuner

[Jim Brown]

On 10/16/2020 7:39 PM, K8TE wrote:
> there is no
> solution currently available when using an external antenna switch
> (necessary with more than two antennas) with the KPA1500. 

I see it as an issue only when using more than one antenna ON THE SAME 
BAND. I have two antennas for 30, 20, 15, and 10M, and three antennas 
for 160, 80, and 40M. My antenna switching system was developed for the 
KAT500. My long 6M Yagi goes to port #2.

  Unfortunately,
> there is no way for the KPA1500 to tell the K3/K3S to use a different drive
> level, even when using ANT1 and ANT2 on the same band, but with two
> different antennas that require different tuning solutions.
> 
> My (not yet implemented) initial solution is to use a macro for band changes
> that will drop the drive level based on previously-determined data when
> selecting a new band/antenna.  The long term solutions is a computer (Pi,
> Arduino, PC, etc.) with the appropriate tables with the data entered from
> empirical testing.  I only wish the ability (firmware and hardware) had been
> included in the original design.

Yes, that's unfortunate. I think Dick has done a great job with the 
tuner design, with it's capability to switch between multiple trained 
settings for every frequency!

73, Jim K9YC