For Sale: Ten-Tec Crystal Filter #220 2.4khz at 9mhz 8 pole for OMNI-5, OMNI-6, Corsair, Argosy, Argosy II, Omni D, Argonauts with filter mod. $75 shipped via USPS. TNX es 73, Dana A. "Mike" Michael W3TS 129 Church Ln Halifax, Pa. 17032-8372 W3TS at arrl.net 717-896-3973 from 7AM to 10PM