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

[Ken K3IU]

  G'morning John:

The number displayed when one adjusts the PWR knob is a 
COMMANDED power level. If the K3 has been calibrated using 
the procedures in the manual, then the power out will be 
what is commanded, assuming a 50 ohm resistive load.

My K3 commands powers between 8.5 and about 13 with no 
problem. Six meters used to not be able to do that, but a 
recent firmware upgrade solved that problem on 6 meters.

73,
Ken K3IU
K3 #202
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
On 9/13/2010 8:51 AM, John Ragle wrote:
>    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
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