[Elecraft] ...clarification required... PWR Setting on K3

[John Ragle]

  Referring to my K3/100 Ser. No. 4103:

    What, exactly, is the number (in watts) that is displayed when the 
front panel "PWR" knob is set to a particular number? Is it actually a 
measured power out (and with what accuracy)? Is it something set and 
calibrated in the firmware?

     Is there any way to get at settings between about 8.5 Watts and 
about 13, which is where there is a discontinuity as one advances the 
knob (short of putting in a pad and adjusting the attenuation on the 
output manually)?

     The numbers on the display around 10 watts do not agree very well 
with my Bird 43 and a 25 watt slug. Which of these should I believe, and 
again with what accuracy? [I know the Bird is only accurate to within ca 
5% of fs.] Please note that I am differentiating between accuracy and 
precision here.

John Ragle -- W1ZI