I have a 600hz Inrad filter for the Orion and other TT radios....a #762 if I remember correctly, that is no longer needed here. I could use an Inrad SSB 9 meg filter for my Omni V, or I'd sell the filter I have for $75 shipped USA. email: mathenyr at marietta dot edu off list. I don't check email every day so response may be a bit slow. de K8RYU