K4KYV writes: I replaced the PA grid/driver plate coil wound on the bakelite form with similar Miniductor coil stock and got a big boost in grid drive when I moved it to 160.
Don, thanks for the suggestion. Trouble is the BC250L's grid/driver plate coil is NOT on a bakelite form. It is a ceramic one, 2 1/2 inches in diameter. I still get the exact same grid drive on 160 meters as I did on the broadcast band. My problem still remains efficiency, and maybe I'll just have to settle with 61% and be happy. 73, Jerry K9AF