Sounds like a bad ground on the antenna mount/mounting stud.
What antenna do you have.
Fiberglass antennas can loosen at the base and cause a bad connection.
it's a brand new firestick.
how ever the mounting brack i have is crap so i ordered a new one from teraflex.
only thing that is confuseing is the antennadoesn;t screw right in. i had to take a piece off the whip antenna taht i had on my jeep before and the fire stick screwed in to that and thenthat went in the mounting plate and my coax cable screwed in from the bottom.
colorado jeep club #269
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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.