Yeah I have the same model you do it looks like. I don't have a ball at the top of the antenna though... it looks like a big screw head on top... maybe the ball was replaced with a screw.....
Anyway..... yes, the base of the antenna above the swivel ball is cracked... I guess I'll have to try and solder it. I'm just hoping that I can solder it and then get it smooth enough to sink back into the slot. If I can get that done and keep the whole thing intact then I can just be very careful not to pull it out of the slot all the way.
Thanks for the advice