Today on a flight the 430 worked perfect the first 30 minutes or so. I noticed a slight static sound, like a stuck mic, and called for a radio check. Long story short they could hear me but I could not hear them. After that I switched to my #2 radio which is an old MX 170 B and all was fine. On the ground I messed with the 430 and could hear fairly good if the volume was turned up a bit but one airborne the static got louder and I could not hear ATC at all no matter how high I cranked up the volume. Once again, they could hear me loud and clear.
I've flown behind this radio for 900 hours over the last 5 years and have never had a single issue until today. As mentioned earlier it happened very quickly as the first part of the initial flight was trouble free. I've got the plane going to Maxwell at the end of the month and will have him address the issue if it's not resolved by months end. Soooo..... Any ideas??