No longer have the Omni-6 (replaced by an Orion), so the filters are for sale @ $75 each, plus postage: Ten Tec 288 1.8 kHz, 6.3 MHz IF INRAD: 750 400 Hz, 6 MHz IF 752 2100 Hz, 9 MHz IF 753 400 Hz, 9 MHz IF 757 2400 Hz, 6 MHz IF If interested, send me email. Eric W3DQ wd3q at starpower.net