Doc tuned hr2600. Adjustable power thru swr knob and unlocked clarifier. External speaker jack added and many capicitors replaced by Doc. He also removed the glue that they used to hold down some components that would cause problems with age. Mobile bracket included and believe I have the manual also. Radio has never been mobile only used as a base. I bought this new way back when they first came out. 10 meters only no 11 meter mod as these were not like the 2510 pll chip. $165 plus $15 shipping.