I have for sale a Kenwood YG455C-1 500hz CW filter for the Kenwood TS930/940/950/850/450/690/140/680 series of radios. It will not work in the TS570/TS480/TS50 series. It works fine and is in good condition. I am asking $65 shipped for it. I can take paypal/check/MO. 73 John AF5CC