[Elecraft] K3 - 'Unwanted' TX Gain calibrations?

[Paul Christensen]

> Been wondering just how the TX Gain calibration works. To quote from the
> manual - "The gain constant is updated whenever the TUNE function is 
> activated on a
> given band at one of three specific power levels: 5.0W, 50W, and 1.00 
> milliwatt."

I'm surprised there have not been any comments on this matter as it's an 
excellent question.

To Stewart's point, does the gain of the K3 recalibrate every time TUNE is 
depressed at one of the three stated power levels when the CONFIG menu is 
set as instructed in the alignment section of the owner's manual for "PWR 
Set = nor?"

Does the K3's display need to reflect "PWR Set" simultaneously for the 
calibration to occur, or can we exit from the CONFIG menu prior to the gain 
alignment so long as "PWR SET - nor"?

Finally, what prevents the re-loading of new gain data if as Stewart 
suggest, he sets the K3 power to exactly 5 watts or 50-watts and depresses 
TUNE for external ATU tuning purposes?  Should he instead stay away from 
those two values and use perhaps 49 or 51 watts?

I am running into the same issue as my K3's 10M output power appears to be 
substantially less (~ 75W) than on lower HF bands.  I would like to ensure 
that I have calibrated gain for 10M and 6M and know that the routine was 
invoked as expected.

Paul, W9AC