[Elecraft] Power output keeps folding back to 5 watts on my KX2

[Tommy]

    Hi folks,

      I'm running FT8 with a KX2 powered by a power supply. The rig 
keeps folding back from 10-12 watts to 5 every time and it's barely even 
warm.  I'll set it to 12W for instance, it'll transmit fine at that 
level but when done cut back to 5w. I don't transmit often enough for it 
to get hot enough to protect itself. AGC is off. Any ideas? I appreciate 
any feedback.

73 de Tom - KB2SMS