Do you know for sure that the exciter has enough output?
Maybe find somebody with a scope, measure the AC and DC voltages at Q1 base and at Q2 gate, see if Sunil (or somebody here) sees trouble in any of those figures.
You could do away with the 3 C's and 2 L's of the output filter if driving a dummy load, just in case the filter was cooked up wrong.
?