lets try this again. the first line ended up in the address last time. I have 9MHZ IF filters available for the OMNI A,B,C,D or Argosy series. They can be put into a Triton IV or 540 if you are handy with rg-174. One #218 (1.8khz) and two #217 (500hz) for $30 each. OMNI V, Paragons and Corsairs use a different series in the 6.3 mhz IF. K7GDN