I know my KAT100 is working ok. On one of my antennas on 80m however, it rattles a lot, and then displays "20" on the LCD. What does that mean? I don't think it found a match because I know how hard it is to get a match with my manual tuner on 80m, but just curious. Fred K6DGW Auburn CA CM98lw K2 #4398 (no idea of the S/N of the KPA100) but best rig KX1 #897