I have a Ten-Tec Model 285 crystal CW filter for sale. It is the 500 Hz bandwidth model for later model transceivers for use in the 6.3 Mhz slots. It fits the Omni-VI+, Omni-VI, Omni-V, Paragon, Corsair II, Corsair and Omni-A/D (with Series B modification ONLY). Shipped to USA addresses for $60 with copy of Ten-Tec instruction sheet. Bob Helms, AF5Z af5z@arrl.net