I have an Icom FL52A which is excess to my needs. It is the 455khz 500hz CW filter and fits in the 736/746/756/737/738/703/718 series of radios, and probably a couple more. It does not work in the 706/725/728 series. I am asking $110 shipped for it. 73s John AA5JG (ex: W5TD, NE0P, N0EEN, KA0IFG) Confirmed 6M addict: 6M WAS #1275, 6m VUCC #1260