Originally Posted by backcountry
After 7 months the noise again returned. Sounds like squelch noise. Again I removed and reinstalled the comm connector on the 50001 box and once again the was gone but didn’t last very long.
Has anyone seen this problem?
Vans eliminated the box on the new RV-12’s.
I feel as the aircraft ages problems will increase considering all those connections on the 50001 box.
Make sure it is not a problem related to the grounding of the box itself.
It is supposed to have a good ground to the airframe (I think internal tooth lock washers are used on the mounting screws to help with this).
When you R & R the harness cable you might be moving the box enough to influence the ground connection.
Also be sure that all pins are fully engage in the harness connector.