I have a Trio YG-3395S original equipment SSB filter for the TS-520 and, I believe, the TS-511/515 and R-599. I just put my INRAD 2.1kHz filter back in the rig so this filter is excess. $30.00 shipped in the lower-48. I will ship elsewhere for the additional cost of shipping over and above the cost to the continental US. Thanks, Jack, NA7RF