Unit is mounted in my big truck.Pulled it out one day and heard a rattle. Opened the bottom and found one of those tuning screws floating around. (looks like a set s***w, goes in one of the threaded tubes with the copper wire windings around it.) There are two hollow tubes without screws that I can see. A black one at the back left, and a brown one at the back center next to where the antenna hooks up through the back panel.Seams like people can hear me for a good distance, but I lose them at 1/4 mile or less. Also, the two empty tubes and the s***w have no sign of the thread locking wax like stuff they used on the center s***w .Thanks
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