And, if you're in the E-LSA category, you could also keep your existing transponder and use the uAvionix echoUAT, which sells for $1,495 (including their SkyFX WAAS GPS, so only $995 if you already have an approved WAAS GPS source). The echoUAT is a great solution for US-based E-LSA, since it transmits ADS-B OUT on the 978MHz UAT frequencies, and includes a dual band (UAT and 1090ES) receiver. Installation is really easy, since the only required connections are power, ground, the GPS antenna lead. The guy who did mine took well under 2 hours to install it. Configuration is done via an Apple or Android app, and takes maybe 5 minutes. You can also use the app to change the settings to use the "anonymous" mode provided by UAT. (This does NOT hide you from the FAA, however. They can still tell who you are.)RBearden56 wrote:If you want make common sense improvements and don't plan to rent your aircraft out for flight training ELSA is the way to go. For example the GDL 82 will cost about $5000 to purchase and install for ADSB and add 4 lbs. A Garmin GTX335 is $3000 and a much easier install, no cutting new antenna mounting holes on the top and bottom of the fuselage, no weight gain, a lot of wires with expensive connectors, etc.
You can (optionally) connect the unit via Serial RS-232 to your EFIS (Dynon, MGL, GRT, AFS, Garmin, Sandia, and Apollo are all supported). Even without that connection, if your EFIS (or EFB, such as ForeFlight or FlyQ EFB) supports Wi-Fi connectivity, you can get ADS-B IN data (both UAT and 1090ES are supported for "IN", but only UAT for "OUT"). And if you've got one of the few transponders that require it, there's a second RS-232 serial connection available for the transponder. (But the vast majority, including the good old KT-76A in my plane, don't need that serial connection - the echoUAT detects the transponder data via the aircraft electrical system - almost like magic! Works really well!)