It is almost routine for me to lose some GTR 225 comm capabilites after ~45 minutes of flight. What happens is the sidetone when transmitting goes away although my Skyview still indicates that I'm transmitting. Reception may also be reduced when my sidetone is gone. Occasionally, it will come back later and appear perfectly normal. At one point I thought my carbon fiber instrument panel may be part of the problem so I removed my headphone jacks from my intument panel and have my headset plugged into the jacks directly (so they are somewhat loose but not touching the instrument panel). And yet it still happens. Could this be caused by overheating of the GTR 225?
