I have the following filters I removed from my Omni 6 rig for sale. 500htz cw filter, 250htz cw filter, 1.8 htz sideband filter and the filter identified as 48036 (217) which I believe is a 500 htz cw filter Just offer a fair price and you pay shipping. W4rte John John Embry Slidell La rtecw at charter.net