well if your getting a swr reading, that means your putting out power. but who knows how much. you really need to use an external meter when checking swr and power. if your antenna was being grounded and you keyed the mic, you very well could have burned up the final. thats something you should always check, make sure theres no continiuity between the antenna itself and the ground. but the radio may be fine, wait till you put on that new mount or fix the old one correctly before trying again.