Re: KPA1500 ATU - ability to handle more than two antennas

Posted by Dan AE9K on Feb 11, 2018; 2:53am
URL: http://elecraft.85.s1.nabble.com/KPA1500-ATU-ability-to-handle-more-than-two-antennas-tp7637638p7638086.html

Wayne,

Thanks for the response.  I waited to respond until the KPA1500 manual was published to see if there were any PF1/PF2 functions out of the box.  What I'd like to see first is much less fancy than interacting with external relay-based antenna switching like you mentioned.  How about initially providing a second set of ATU segment memories to allow a /manual/ external switch?  The amp can't know or control which antenna is selected but it would be very handy to have a PF function key the operator could use to toggle between ATU segment set one and two, for example, when the manual antenna switch position is changed.

I envision it like this:

ANT1
   \
   Manual Switch
      \--:  Antenna 1  (Select ATU logical segment set 1 with PF1 tap)
      \--:  Antenna 2  (Select ATU logical segment set 2 with PF1 hold)

ANT2
   \
   Manual Switch
      \--:  Antenna 3  (Select ATU logical segment set 1 with PF1 tap)
      \--:  Antenna 4  (Select ATU logical segment set 2 with PF1 hold)

Just a manual logical segment set change in support of manual external antenna switching.

Is that do-able?  I imagine I'm not alone in the use of manual antenna switches and needing to accommodate more than two antennas without the ATU experiencing a high-SWR-triggered re-tune hunt each time an external switch selects a different antenna.

Thanks,

Dan
AE9K




--
Sent from: http://elecraft.365791.n2.nabble.com/
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[e-mail]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [e-mail]