You might calibrate the TX Gain.  But it should not have changed this
quickly.  Odd.  

Others will have advice too.

73,
matt W6NIA

On Tue, 02 Jul 2013 15:03:59 -0500, you wrote:

>I hadn't used my K3 (#474) for a few days when I checked into the Elecraft SSB 
>net on Sunday.
  I immediately noticed that the Power Out bar graph was peaking only
around 60-70W. It normally peaked closer to full output on voice
peaks.  Later I checked it with CW and it was still only hitting about
75% output.  I confirmed the power control was set to 100W.  I did an
Auto tune before each test and this problem exists on every band. Both
my LP-100 and my LP-100A digital watt meters showed about 120W output
(both were factory calibrated by Larry).  But the K3 bar graph still
shows 25% lower than full output.  This I also confirmed into a dummy
load.  I had not observed this before Sunday.  All else appears to be
functioning properly.  
> 
>I might be one or two software versions behind but have done all circuit 
>upgrades. 
Is this a known indication of an upcoming problem, or do I simply need
to recalibrate the K3's Power Out meter?
> 
>73,
> 
>Terry W0FM
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