Hello Mike -
I had a similar problem a while ago and Wayne suggested fitting some bypass capacitors in various places around the processor on the ATU board. Unfortunately I am unable to get to either the information or the rig at the moment as the contents of the shack are in storage due to building repairs.

In my case, during an over while I was transmitting, the KX1 started retuning the antenna and ended up with a very low power and a high SWR. Fitting the capacitors as Wayne suggested totally cured the problem.

73

David G4DMP

In a recent message, Michael Madden <[EMAIL PROTECTED]> wrote ...
I took the KX1 out yesterday for more field testing.
This time, I wrapped with a torroid the 6" unshielded
lead from the external battery holder.  The idea here
was that RF was getting into the 6" battery lead and
somehow the dirty DC was tripping the ATU controller.

Well, at first, it seemed like the problem was solved.
But after about 1 hr of having the KX1 on, I started
getting the problem again.  (The problem with the ATU
switching from TUN to CAL by itself when I start
transmitting.)  This time, I only saw it on 30M.  But
it was intermittent:  when it started happening, I
shut the rig off, turned it back on, switched bands,
and then I wouldn't get it for a while.


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