I found my problem: I had forgotten to install R28! I even inspected the board carefully for missing parts and bad solder joints. somehow - I missed it. Once in place - everything's was perfect and I was on the air with 100 watts in no time. A really fine design job. Just outstanding. Thanks Wayne and Eric. The K2 and the KPA-100 were wonderful building experiences. Now to complete K1/4 #1297. Doug -- W4DXV