[Elecraft] KXPA Power Output

[Tom Field]

I'm having difficulty getting more than about 70 to 80 watts out of the
KXPA 100. I have it connected to a KX3 with the Elecraft cable and have
gone through the calibration procedure as outlined in the owners manual and
in Fred Cady's excellent book.

For Example if I go through the calibration procedure on 40 meters,
It appears to show a drive level of 5 watts to achieve 75 watt output.
If I transmit into a dummy load, with the power setting at 100 watts,
I have a drive power of about 2.6 watts and an output power of about 70
watts as shown in the KXPA Utility.

Am I missing something?

Tom
KN6DR