Assuming the Power Supply is sufficient, the next thing you should do is
the KX3 + KXPA100 Power calibration. I did this for a fellow ham and it
solved a similar situation:
https://ftp.elecraft.com/KX3/Mod%20Notes%20Alerts/KXPA100+KX3%20Power%20Cal%20rev%20A.pdf
Tim
On Wed, Oct 26, 2022 at 9:10 AM Greg Troxel wrote:
> [reposted because the list blocked an OpenPGP/MIME signature]
>
> Kyle Krieg writes:
>
> > In more troubleshooting, I'm finding that when I switch my KX3 to PA mode
> > ON, the KX3 is only putting out around 2 to 3 watts output to the
> KXPA100.
> >
> > But then when I swtich the PA mode to off and change the power button to
> 5
> > to 15W output, the correct amount of RF is output from the KX3.
> >
> > Is there a setting to boost the power when PA mode is on?
>
> There is a feedback loop on output power, and I would expect drive to be
> adjusted for that. It seems like the KXPA100 is perceiving that output
> power is higher than it is. Either that or your power meter is off the
> other way.
>
> What happens if you command the output power to 20W, 50W, 75W when using
> the KXPA100?
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