Anyone have a trouble shooting guide for a PTT not working? Audio panel and intercom was checked out good on the bench. I have 2 coms and neither will TX when PTT is pressed on pilot or co-pilot side.
As I understand it, when the tip and ring are connected (PTT) from the mic plug, TX should occur.
Any help on checks would be great.
layout is 2 coms, Narco CP36 audio panel, Sigtronics SPA400 intercom.