We are doing the last of the electrics and have just got ourselves a bit stumped.
We have pigtails coming down to the headset and mic jacks in shielded cable - we are using the Approach Systems Hub which has worked really well.
Jacks are Switchcraft from Aircraft Spruce but we now find that they don't include the insulating washers for the mic jacks - useless lot !
Also, we have no wiring diagram for the stereo headset jack or for the mic jack.
The leads from the GMA-340 are labelled
Pilot phones L, R and LO.
Pilot Mic HI, LO, KEY
We have a seperate pigtail for the ptt on each stick.
Any suggestions welcome please