Please excuse me if this information has been given already. I spoke to Wayne N6KR at Dayton a few years ago about the KAT3. To clear all memories in the KAT3: While in Config:KAT3, tap the "CLR" button on the K3 panel. (This is per band) Tune KAT3 into a dummy load - each band to re-establish memory. 73, Jim Douglas K2ZF