MOSFET Power Modification Kit for Cobra 25, Uniden 66, Uniden 68 CB Radios Everything needed for the conversion and upgrade to a MOSFET final for Cobra 25. Kit contains a new MOSFET IRF520 transistor, capacitor, and bias voltage components. Illustrated instructions included. This kit will provide 35 - 45 watts PEP while continuing to allow full adjustment of AM carrier levels. No clipping of limiters means your radio will still utilize full ALC circuitry, eliminating SSB warble and distortion. mosfet power modification kit final mod kit mosfet kit This kit requires moderate SOLDERING SKILLS and BASIC ELECTRONIC KNOWLEDGE. If you do not know what you are doing, have a Technician install the kit for you.