Re: ATU Manual settings - KPA1500
Posted by
wayne burdick on
Jun 16, 2018; 9:35pm
URL: http://elecraft.85.s1.nabble.com/Re-K3-SSB-CW-Power-Overshoot-tp7642086p7642100.html
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 <
[hidden email]> 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
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