I am looking for a 218 Ten Tec filter for 9mHz i.f., OR Inrad equivalent. 2.1 a possibility. For trade I have a Inrad 758 which is 2.1kHz for 6mHz i.f. I could also swap a Kenwood (gasp!)yg-455-S1 plug in SSB filter for ts940/950/850 and others. Thanks for the time. mark k8vf