Originally Posted by Nickb145
Looks as though the 327 doesn't satisfy the 2020 ADSB-'out' requirement. We are only 3 years away. I'm sure there are going to be cheaper options to come but it might be worth considering the GTX 335.
Says who? The GTX 327 Mode C transponder is very capable of satisfying the 2020 mandate. I am installing 4 of them in conjunction with 2020 compliant ADS-B out systems. Two with Freeflight RANGR Lites, and two with Garmin GDL 88's/GTN combos. I was going to install another with a Navworx EXP out unit but put that on hold pending tge FAA investigation. One of the advantage of staying with Mode C is the option for "anonymous" mode only available with Mode C when squawking 1200. Not to mention the huge cost savings. I am picking up serviceable 327s and 32s (remote version) for $500. That anonymous mode is not available with Mode S or any 1090 solution. Disadvantage of staying Mode C is no flight over 18,000 feet or international (although Canada and Mexico have not adopted ADS-B requirement yet.
I am getting 2020 compliant UAT out ADS-B for the neighborhood of $2500 with a digital GTX 327 added to a Freeflight RANGR or at $2000 if re-using an existing legacy grey code transponder like the old KT76A or Narco AT series. As for "in" all that takes is a GDL 39, Stratus or whatever your preference for a few hundred.
If you are a domestic flyer under 18,000 feet, or don't have 12" N numbers, don't let an avionics salesman over sell you on Mode-S or all in one solutions while removing your right to privacy under anonymous mode.