On Wednesday, January 4, 2017 at 10:50:13 AM UTC-6, Darryl Ramm wrote:
TSO-C166 *is* TABS.

Some of the rest of this stuff has been discussed on r.a.s. before.

What hasn't been discussed on ras before? It is January.

And the TN72 is new, $400 and TSO'd source for ADSB-out.
They were tricky, flipping the digits upside down.

TSO-C199 != TSO-C166