[Kenwood] TL-922A question

Thu Dec 8 01:00:06 EST 2011

I see I'm going to need some straightening out on my thinking of using linear amps. I thought my exciter (Yaesu FT-101zd) would drive it full output with maybe 50 watts or so. 
I'm finding I run maybe 150 watts into the TL0922A, and it still puts out maybe 500 CW watts.
Now, I have a 160' dipole, feed with 450ohm ladderline. It comes into the house through a 4:1 toroid, just outside my shack. I have a good 3KW antenna tuner (with roller coil). My other exciters load it fine barefoot. 
Using my TL-922A, I have the feeling that everything is "right", and it seems to like my ant situation. I guess my big questions are:
A. Why does it take 150 watts to get 500 CW out?
B. What do I need to do to get more output? 