Unusual circumstances forced me to sell my Fisher F5. I have the 11 inch dd coil, with coil cover left and will sell for 120.00 shipped, insured, Priority Mail. This coil was used three time for less than 10 hours and made a world of difference performance wise on my F5. This coil is not a plug in connector, but is the screw type. I might consider a like new condition pair of high quality headphones as partial payment. Thanks. R.L. Johnson