Icom FL 100 500hz cw filter for 9 mhz IF, $70=0D =0D Inrad model #116 400 hz cw filter for 455 khz IF, $80=0D =0D Worked well in an IC 746 which I no longer own.=0D =0D Email [email protected] if interested.=0D =0D 73/Mike K9MI