Thanks both.

Luckly the intercom is in a position where I can remove it from the panel and rest it on the cockpit wall by standing at the leading edge of the wing. I'll check this weekend to see whether pin 18 has been wired.

I must confess I that hadn't even thought of plugging my iPad into my ...

Hi, I'm looking for some help with the 403MC intercom .

I'd quite like to get it set up to work with SkyDemon's audio alerts via my iPad.

I gather that I will need the following to enable audio input to the 403:

D-sub pin
Shielded twisted pair wire
3.5mm jack to put somewhere in the panel
Pin ...