no connection to antenna to base but will charge

There is a little brass (thing) on the bottom of antenna post and after I switched to another unit I realized that that little brass colored thing was stuck it the dock and when I put another receiver on dock it pushed up the little post into unit making it not work. I have never had a unit apart so I was not sure if there was a way to fix it. Sorry as it is a little hard to explain and I did not go to Harvard. Thanks for any help!!! Frank