Re: Transponder + Encoder
If you plan to go with one of the new EFIS boxes be advised that most of them have encoders in them already, I know AFS does. Of course you'll need a transponder regardless.
Oh, and does your transponder accept both gray code and serial inputs? Many of the newer EFIS boxes only output serial data.
Re: Transponder + Encoder
If you are buying used be careful, being on a budget and not knowing much about transponders I bought kt76a thought I got a really good deal, could not get it to work I sent it in to a avionics shop to get checked out and they said that it could not be fixed. Told me you can't go wrong with a garmin that didn't have some tube. I found a garmin 320a for good price on ebay, which is a good thing, because I lost money on the kt76a. Also if getting used make sure they have a yellow tag I didn't on my first transponder. live and learn I guess.