[Elecraft] KPA100 Output not adjustable

[Michael van Hauten]

Hi elecrafters,
since this morning i have a problem with my KPA100. I cannot adjust t  
rf output. In the high mode, i  always have more than 100W with a  
dummy load. In QRP mode, i can adjust .5 to 10w. When i reach the 10w,  
the power goes directly (jumps) to the maximum power of about 100w.  
Any ideas?

Thank you
Michael, DC0ZO

K2#5619, K2#6454