Here's a chart for tuning your BC-375 into a 50-ohm antenna. Each rig is different, of course, but this should get you "in the ball park." FREQ CONTROLS A-B-C-D-M-N-O 1806 KC 2-2263-65-6-14-3-50 1890 KC 3-632-21-6-14-3-50 3553 KC 2-730-39-6-6-2-36 3885 KC 2-1400-57-6-39-2-46 7045 KC X-1690-59-5-22-2-52 7285 KC X-1906-69-5-21-2-64