"The inverted L loads just fine to about 700 watts and then causes the Alpha amp to fault out. I think I am getting a sudden change in antenna impedance. The antenna is fed through a 5 KW rated choke balun. The feed line exits the base between radials."
Remove the balun. It's not doing anything for your and is a potential source of loss and problems. Coaxial cable is unbalanced, as is a ground-fed inverted L. No need for a balun. Check all your connections - make sure they're tight and well soldered or clamped. You're pushing a lot of RF current through them and a marginal connection will generate much heat and expand. -Jeff W0ODS _______________________________________________ Topband reflector - topband@contesting.com
