On Saturday, May 11, 2019 at 7:44:47 AM UTC-7, son_of_flubber wrote:
My interpretation is that an operative transponder needs to be turned on in Class A, B, C, D, and E airspace. You can legally turn it off in Class G, but why bother?

We don't need no stinkin' FARs... Once installed, why would you turn it off in flight?
I didn't see this link in the thread. See:
http://jeremy.zawodny.com/blog/archives/007288.html
And ask Rick Indrebo what it takes to rebuild a glider eaten by a bizjet.
Jim