[Elecraft] K2 40m Tx current drain

[Neal Campbell and Sarah Ferrell]

I am just at the 40m L1/2 alignment for my K2.

On rx with the lcd set at nite, I show 13.6v @ .18a.

Using an external analog wattmeter into a dummy load, I measure at 5 
watts 12.9v and 1.8a. Also, the display shows the power output at 3.5w 
instead of 5. When I tune the power output control so the external 
wattmeter shows 2 watts, the power display says 1.5 watts.

Is this a sign of trouble? Why would there be a difference between the 
external wattmeter and the power display on the k2?

73 Neal