I've bought and installed a (used) Garmin GNS 430 connected to a GMA 340 audio panel. (At the same time I also bought and installed an ICOM-A210). While generally happy with the 430, I have two problems I haven't been able to figure out:
- Output COM volume is very quiet. I have to turn the 430 volume knob to max to make it loud enough to hear. (OTOH, the ICOM radio is plenty loud and clear, even at 40% volume).
- When I use the 430 COM and key the mic, I get no sound in the headset. The unit does transmit ( TX enabled on screen ) and radio tests indicate that other receivers do "hear" the transmit, but the lack of feedback in my headset is very unnerving. (OTOH, the ICOM radio works as expected).
