Matteo,
I had the same with my build years ago. Turned out that I crushed one of
the driver transistors while seating the amp. You might check that. I
believe it is located near the rear panel.
I was able to straighten it out and get it working until I received a
replacement from Elecraft.
73,
Dave W8FGU
On February 23, 2018 07:23:05 Matteo Gosi via Elecraft
<
[hidden email]> wrote:
> Hello,
> I have finished to build my K3S but unfortunately I am experiencing some
> issue.Everything seems to work fine as no errors are showing in the display
> and when I did the TX gain calibration it went ok with no errors.I have the
> ATU and 100W PA installed.Basically what is happening is, if I keep the
> power up to 12W everything is ok but when I increase the power (I hear the
> relay clicking to engage the 100W PA) the received signal just drops to
> almost zero.I have taken the PA apart again to check if there was any
> damaged pins but all looks ok.
> Does anyone experienced this issue?
> PS. The PA put out 100w as it should.
> 73, MatteoM0TKM
>
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