[Elecraft] KPA1500 ATU - ability to handle more than two antennas

[K9MA]

I designed my station controller over 20 years ago.  Since I'm a 
hardware designer, it's all hardware. I suppose, however, something like 
your Arduino could be programmed to read the antenna switch and send a 
serial command to the amplifier, though that seems a lot of trouble.

73,
Scott K9MA

On 1/27/2018 10:06, Bill Frantz wrote:
> My switch uses an Arduino to read the band lines from the K3 and 
> select the last antenna(s) used on that band. It the code could easily 
> be modified to tell an antenna tuner -- in the K3, an amp, or separate 
> -- which antenna system is in use. Manual switching is with a button 
> for each antenna.
>
> 73 Bill AE6JV
>
> On 1/27/18 at 11:31 PM, k9ma at sdellington.us (K9MA) wrote:
>
>> Another advantage of doing all the antenna switching external to the 
>> amplifier is it allows using a single coax, which can easily be 
>> disconnected when there's lightning about.
>
> In my case, it minimizes the number of coax runs, which keeps my wife 
> happy.
>
>
>> My system, for example, has a toggle switch to select one of my two 
>> tribanders.  I can switch back and forth several times in a second 
>> when trying to determine which direction the signal is coming from.  
>> I can't possibly manipulate more than one switch that fast, nor to I 
>> want to have to reach over to wherever the amplifier happens to be, 
>> and I certainly don't want to be messing around with a mouse.  (While 
>> all this antenna switching is going on, the other hand is running the 
>> radio.)
>
> -----------------------------------------------------------------------
> B

-- 
Scott  K9MA

k9ma at sdellington.us