I have for sale a Kenwood YK88C-1 500 hz CW filter for the Kenwood TS450/850/950/940/930/570 radios. I am asking $80 shipped in the US. Sells new for $130. 73s John AA5JG (ex: W5TD, NE0P, N0EEN, KA0IFG) Confirmed 6M addict: 6M WAS #1275, 6m VUCC #1260