There was a suggestion the internal two tone test oscillator gives
better results by some 3dB than can be obtained by feeding an external
two tone into the K3... That would put the above figures at about the
same as the ARRL measurements.
If you have CMP set to 0, set the external 2-tone oscillator (Elecraft
2T, of course) to a reasonable output level, and adjust MIC GAIN so you
get full power but little or no ALC action, the IMD is the same as with
the internal two tone test oscillator.
Or at least it is so reported today at one of the Elecraft labs!
73,
Lyle KK7P
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