I currently have a pair of 2.4 khz filters and a pair of 2.0 khz filters (both Yaesu). I would like to add a pair of 1.8 khz filters (INRAD) and would like to know if it is possible to add them in the 250 hz slots? I work mostly sideband and have a pair of 500 filters for CW and do not want 250 filters. TNX and 73, George K3GV DX: Long may it live !