At AirVenture 2017, Trig Avionics introduced a budget-based WAAS GPS receiver that meets the FAR 91.227 position source requirement for the FAA's 2020 ADS-B mandate. Priced at $389, the TSO'd TN72 remote GPS receiver is compatible with Trig's TT22 or TT31 TSO'd 1090ES transponders.
This is a companion discussion topic for the original entry at https://www.avweb.com/air-shows-events/trig-avionics-offers-low-cost-ads-b-gps-receiver-comm-radio