Avionics Work on my NXCub

[ve6yeq]

There are two different kinds of “interlocks” being discussed here:

1. Audio mute to prevent you from hearing other transmissions while talking which can confuse some people if they are not practiced at multiple simultaneous conversations. This is controlled with DIP switches on both the GMA-245R and for Bluetooth audio on the headset controller.
2. RF Pre-amp interlocks which prevent the large amount of RF energy from one transmitter overloading or even permanently damaging the very sensitive RF pre-amps by powering it down.

In my Carbon Cub EX-3 with GNC-355A and GTR-20 using the default antennas, I can definitely hear the RF pre-amp on the edge of overload so after this discussion, I will look at adding the necessary wires to disable the pre-amps when one is transmitting. I already have my Lightspeed ANR mounted in the helmet set to mute and I think I might try it with the GMA-245R as well.