Re: [Elecraft] ATU Manual settings - KPA1500
Thanks, Wayne. 73, Scott K9MA On 6/16/2018 16:35, Wayne Burdick wrote: Scott, Every ATU design has different stray amounts of L and C. But the differences are small between the KPA1500 ATU and our other ATUs, especially the battlefield-proven KAT500, which has a virtually identical circuit. We test the ATUs into various loads to verify matching range. That said, if you believe yours has a matching range problem, please contact support. There’s even the possibility it’s a firmware issue. 73, Wayne N6KR On Jun 16, 2018, at 1:26 PM, K9MA wrote: I've also noticed that the ATU often doesn't get a very good match, even if I try twice as per the manual. The K3 ATU, by contrast, usually finds a much better match for the same load. (Not talking high load SWR here, less than 2:1.) I haven't compared the component values in the two ATU's, but I expect they're similar, so they should be able to achieve equally good matches. Scott K9MA -- Scott K9MA k...@sdellington.us __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@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 arch...@mail-archive.com
Re: [Elecraft] ATU Manual settings - KPA1500
Scott, Every ATU design has different stray amounts of L and C. But the differences are small between the KPA1500 ATU and our other ATUs, especially the battlefield-proven KAT500, which has a virtually identical circuit. We test the ATUs into various loads to verify matching range. That said, if you believe yours has a matching range problem, please contact support. There’s even the possibility it’s a firmware issue. 73, Wayne N6KR > On Jun 16, 2018, at 1:26 PM, K9MA wrote: > > I've also noticed that the ATU often doesn't get a very good match, even if I > try twice as per the manual. The K3 ATU, by contrast, usually finds a much > better match for the same load. (Not talking high load SWR here, less than > 2:1.) I haven't compared the component values in the two ATU's, but I expect > they're similar, so they should be able to achieve equally good matches. > > Scott K9MA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@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 arch...@mail-archive.com
Re: [Elecraft] ATU Manual settings - KPA1500
I've also noticed that the ATU often doesn't get a very good match, even if I try twice as per the manual. The K3 ATU, by contrast, usually finds a much better match for the same load. (Not talking high load SWR here, less than 2:1.) I haven't compared the component values in the two ATU's, but I expect they're similar, so they should be able to achieve equally good matches. Scott K9MA On 6/16/2018 12:07, Paul Baldock wrote: It seems I can get a much better SWR by manually changing the L/C settings. However, I have not figured out how to store those manually entered settings; it always returns to the auto setting (as demonstrated by changing bands and then changing back ). Anybody know how to do this? - Paul KW7Y __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@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 k...@sdellington.us -- Scott K9MA k...@sdellington.us __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@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 arch...@mail-archive.com
