Hello everyone, I am desperately seeking advice on wiring issue in a RV9A. I have the following:
- Garmin GMA245 audio panel connected to:
- IFD440 GPS/NAV/COMM
- King KX125 NAV/COMM
The issue is wiring for KX125 and it stems from this one pin 7 on the unit. I am not sure where it goes and/or connects to. From the schematics, it looks like it goes to the mic jack and some say it goes to aircraft ground. But I am not sure as IFD440's Mic Ground connects to Audio Lo on the GMA245.
Initially, I had pin 7 not connected to anything and the result was: When PTT is depressed, TX is visible on both GMA245 and KX125 but no audio is heard.
Then similar to IFD440's connection, I connected both pin 6 and pin 7 together to GMA245's COMM2 Audio Lo. The result was pretty much the same but now there is tremendous amount of static heard on test radio (not KX125 but a handheld unit) when I transmit.
At this point, I am about to connect pin 7 on KX125 to aircraft ground but wanted to seek advice beforehand.
So any advice/suggestion would be appreciated. Thank you
- Garmin GMA245 audio panel connected to:
- IFD440 GPS/NAV/COMM
- King KX125 NAV/COMM
The issue is wiring for KX125 and it stems from this one pin 7 on the unit. I am not sure where it goes and/or connects to. From the schematics, it looks like it goes to the mic jack and some say it goes to aircraft ground. But I am not sure as IFD440's Mic Ground connects to Audio Lo on the GMA245.
Initially, I had pin 7 not connected to anything and the result was: When PTT is depressed, TX is visible on both GMA245 and KX125 but no audio is heard.
Then similar to IFD440's connection, I connected both pin 6 and pin 7 together to GMA245's COMM2 Audio Lo. The result was pretty much the same but now there is tremendous amount of static heard on test radio (not KX125 but a handheld unit) when I transmit.
At this point, I am about to connect pin 7 on KX125 to aircraft ground but wanted to seek advice beforehand.
So any advice/suggestion would be appreciated. Thank you