Ten Tec filters (installed when I bought my Omni from TenTec less than a year ago)- $60 each plus shipping: #217 (9MHz - 500Hz cw filter); #285 (6MHz - 500Hz cw); #282 (6MHz - 250Hz); #220 (9MHz - 2.4Mhz); and the 2.4 6MHz. Thanks, Tim