Check your PTT lines
Check you PTT lines. The intercom box isolates the mics, so if you on intercom, it would work normal, but if the PTT lines were reversed, when you key the radio, it would key the radio, but the mic audio would not be the correct one, and you would not have any mic audio going to the radio, so no sidetone.
Radio Push-to-Talk (PTT) Behavior and Priority
When the pilot or co-pilot presses their PTT switch, only the person pressing their PTT is heard over the radio.
If the pilot and co-pilot PTT buttons are both depressed, the pilot PTT takes priority. Only the pilot’s voice is transmitted over the radio. Additionally, the pilot PTT will take priority from the co-pilot even if the co-pilot PTT is already depressed.
Last edited by Pdtofly : 05-08-2020 at 10:44 PM.