Only a generic comment about most stick radios - you usually have to take the case apart (carefully), and remove the spring that self centers. Some radios come with a small screw and a piece of brass flat stock that provides friction on a serrated piece of plastic to which the stick is attached.
Without the brass, the stick will (perhaps) stay in position - but with the friction of the small brass strip when added, the stick won’t move as easily by itself.
If reluctant to try to make such a modification, your local hobby shop radio guy probably will do it for you.
With parts in hand, it is about a 15-20 minute process. Don’t over tighten case screws when reassembling. You are usually not in touch with the radio components - at least I wasn’t and have done about a dozen of the AM radios. As I recall, the Hitec radios actually came with the strip and a screw to make the modification.