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

[K9MA]

How about using an external switch to select which ATU settings the amp 
uses?  Perhaps with a digital INPUT line?

Scott K9MA

On 1/26/2018 11:15, Wayne Burdick wrote:
> This is definitely doable from the amp. All it takes is an external antenna switch with a control port compatible with RS232, Ethernet, USB, or one of the amp’s multi-purpose digital output lines. (These have other uses, too, such as SWR alarm output.)
>
> To select among antennas from the amp, you could do any of the following:
>
> - tap the ANT switch to go between two or more antennas in rotation
>
> - tap ANT then use the UP/DN switches
>
> - assign two frequently-used antennas to the front-panel PF1 and PF2 switches
>
> In all cases, the LCD would show your selection from among N external antenna jacks.
>
> We can adapt the firmware to handle any such scenario.
>
> Wayne
> N6KR
>
>
>> On Jan 25, 2018, at 7:58 PM, K9MA <k9ma at sdellington.us> wrote:
>>
>> I'm concerned about the same issue:  Multiple antennas on one band. I have an automated antenna selection system.  In addition to following the band data from the transceiver, there are switches to select antennas.  I frequently have to very quickly switch antennas, so it must involve only a single switch.  Using a mouse with the computer is nowhere near fast enough and I really don't want to make it dependent on the computer, anyhway.  However, my antennas have different impedances, so require different ATU settings.  So, how can I tie the KPA1500 ATU into my antenna control switch so it automatically switches settings?  All the antenna switching is external to the amp, so only a single amp output is used.  The ideal would be a control line to the amp, controlled by the same switch that selects antennas, which would select ATU settings.  I really don't want to make it dependent on the computer.  I expect others have the same issue.  Can the KPA1500 be made to do something like this?
>>
>> 73,
>> Scott K9MA
>>
>> -- 
>> Scott  K9MA
>>
>> k9ma at sdellington.us
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to n6kr at elecraft.com


-- 
Scott  K9MA

k9ma at sdellington.us