:p Thanks guy's for responding. It looks like maybe I can use one of my TX's with FMS after all.
I did a quick search for TXINT with no luck so if you could e-mail it to me it would be greatly appreciated. I am really beginning to wonder if the jack is at fault, I am also questioning my pinout diagrams. As I look at the jack on the front of my Airtronics from left going clockwise should the pinout read 1 4 2 5 3 or am I reading it backwards? Would this be the same for my Futaba too?
I like the looks of your interface. It is very similar to one I've already tried except that mine was very crude compared to the sanitary construction of your unit. I also am not sure I was using the correct pinout for my TX (see reply to John above). It would be nice if had some documentation for my radios but alas I am too cheap and purchased all my equipment used
Thanks again for all your help. One last question - is there a difference in the signal from the buddy jack between AM and FM units?