I have ended up with one spare INRAD 400HZ CW filter for the 8.83mhz IF on Kenwood radios This is the filter on the circuit board that fits the 450/570/690/850/950 series of radios I am asking $75 shipped in the US, and can work out international shipping. 73s John AA5JG (ex: W5TD, NE0P, N0EEN, KA0IFG) Confirmed 6M addict: 6M WAS #1275, 6m VUCC #1260