[Elecraft] K3 RF Power Calibration

[Gordon Calder]

After replacing my K3 DSP board with the upgraded version, I found that my watt meter calibrations
were way out of spec.  I redid the low power cal and the K3 now tracks my Bird 43/HP RF VM / oscilloscope combo
almost perfectly as it did before.
However, no matter what I try, I can't get the HP watt meter in spec.  When I do the calibration at 50W, the K3
puts out 100 W when 70W is selected.  I finally ended up calibrating at 100 W, but of course everything is way out of 
spec below 90W and WMTR HP is maxed out at 180.
Before the board switch , the K3's power meter tracked my other instruments within a few watts.
I've done multiple re-sets and gone back to earlier SW versions but no luck.
K3 S/N 489; 4.12, 1.13, 2.60.  Any suggestions?

By the way, the upgrade improved the audio.  It seems smoother or less harsh than before especially
on CW.  Purely subjective!

73

Gord  VE7YU