[Elecraft] KX1 high power

[ek]

The KX1 I just bought and built, #2219, is hitting 5W on the external 
12vdc PS.   This setting returns 1.5W on 40M, when using the brand new 
AA internal batteries.

If I set it to 4W with the 12vdc supply then, when I am on the internal 
battery pack I only have 1W on 40M and 500mW on 20M.

I have yet to find a setting that delivers the 1.5-2W/3-4W stated in the 
manual.   If I increase it to 2W on the internal pack then it's up to 
6.5W when I switch to the external 12v battery.

I am using my OHR WM-2 Wattmeter and OHM RF Load.

Any helpful input is appreciated,
Ed - AD7GR
KX1 #2219
w/ATU