Originally Posted by Driving '67
I do have the interconnect wire from GTN650 P1003 pin 11 to GTR20 p2001 pin 5 as per the manual. I checked it today and itís grounding when the mike is keyed.
I donít plan on using the comms in split mode but I like to monitor 121.5 on com2 when enroute (old habits die hard).
Glad to hear you are not trying to use your installation in Split COM mode (2 radios transmitting at the same time). While the GMA 245 supports Split COM mode, this is normally only used by large dual-crew member aircraft with COM radio antennas on the top and bottom of the aircraft that are widely separated. You certainly would not attempt to use Split COM mode with your high power COM radios on an RV-14/14A with both antennas mounted side-by-side on the bottom with only a 36" separation!
There is, however, no problem with what you are trying to do. You should make sure that DIP switch 3 on the GMA 245 is in the down position to enable the Mute On COM TX feature. Most of us do not want to be distracted by hearing the non-selected COM radio when we are transmitting on the selected COM radio.