On Saturday, December 16, 2017 at 5:54:28 PM UTC-8, son_of_flubber wrote:
A small point of clarification that I've not seen mentioned elsewhere.

Mid Continent Instruments and Avionics told me that the software in the panel mounted 'head unit' TC20 also needs to be updated.

Your transponder TT21 or TT22 is in the gold box. The TC20 is the black thing with buttons and a screen that mounts in your panel. You need to ship both the gold box and the black panel thing to Mid Continent.

My Avionics shop is fully booked doing ADSB installs. But my glider is experimental, so they're happy for me to do all the leg work, get the software updated, get the antenna and TN72 mounted in the tight space, make power and interconnections between the boxes and configure the software. Richard at Craggy Aero provided a complete cable harness, so the install is pretty easy.

Once it is all set, I can trailer the glider to the Avionics appointment (90 minute drive) and wait while they check the installation and make the log book entries. Should take about one hour of their time. I'll get the two-year check transponder check on the same road trip.

A close encounter with a power plane last fall encouraged me to upgrade the transponder that came with the glider to TABS.

Thanks Flub,

That's correct. I just received the updated TC20 control head and TT22 (formerly TT21) transponder box back from Mid Continent. Everything was very professionally done and all certification documents included. Now installing in an experimental category glider with the TN72 box and TA70 antenna. This should provide full 2020 compliance. Note: certificated gliders will require the TN70 unit instead of TN72.

Cheers,
Craig
7Q