Not sure what brand antenna you have, but I would think rotational adjustment would be a must have. Ours has a plate below the extender crank that you pull down and then rotate either direction and then release (spring loaded). It should have teeth all the way around on both surfaces that lock in place, and a pointer that must be lined up when retracting. The antenna must be fully extended before attempting to turn it. Good luck and let us know what you find.