Originally Posted by Darren Kerns
Well, my Garmin 430W finally quit transmitting. Having it sent to Garmin to fix. $900 flat rate is high but what do I do. When I was transmitting on my SL40 I had a lot of cockpit or white noise in my headset. I have a Lightspeed 25XL headset.
I wondered if I should have switched the stereo to mono or vice versa to notice a difference. Is there something else I should be looking at. When I first transmitted it about blew my eardrums out. Was not expecting that.
It all depends on your intercom and how is it wired. Most of the modern intercoms are stereo. Older ones are mono. They tend to not work properly if the headset setting doesn't match.
If the 430 is truly dead, you don't have any options. $900 is less expensive than purchasing a new GPS/COMM.
Noise in the headset is most likely a wiring issue with how the shields are terminated or a ground loop issue. These are a real PITA to troubleshoot in a flying aircraft.
The volume when you transmit is called sidetone. You can adjust that volume in the setup menu while on the ground.