TenTec 288 1.8kHz 6.3mHz IF 8-pole $45 plus shipping TenTec 282 250Hz 6.3mHz IF 6-Pole $55 plus shipping INRAD OMNI-VI/VI+ Roofing Filter Modification Kit NOS - Includes factory wired circuit board with #763 600Hz filter, cables, hardware, and detailed instructions. (works with OMNI-V, but with cable splice) $95 plus shipping. 73 es tnx Bill N4LG