My problem with this radio is that it's rx is fine,but when i try to key up the led light goes out(no red).I've checked the pa with an external speaker and no modulation.The weird thing is if you look close enough to the led it try's to change to red when you key up?.No dead key carrier at all,could it possibly be the audio chip?,any help here guy's. bigun :? (p.s)yes the mike is good,i think it's in the audio section around the audio chip)