Re: KPA-1500 ATU not working well
Posted by
K9MA on
Jun 22, 2018; 9:31pm
URL: http://elecraft.85.s1.nabble.com/KPA-1500-ATU-not-working-well-tp7642239p7642270.html
My observation , also.
Another approach would be for automatic drive adjustment, or ALC that worked. The latter, I know, is very difficult to do with an amp.
Scott K9MA
----------
Scott Ellington
--- via iPad
> On Jun 22, 2018, at 2:36 PM, Paul Baldock <
[hidden email]> wrote:
>
> I have found that if the KPA1500 is feeding a largish SWR (like 1.5:1 as you suggest) then the drive power required to maintain a constant output will vary significantly as you tune across a band. This means you have to keep adjusting the power control within a single band. This appears not to occur if the SWR is 1.1:1 or better.
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