13 November 2025
Trig Avionics has unveiled the TT23, the latest addition to its compact Mode S transponder line, offering a smaller and lighter form factor along with optional integrated GPS for ADS-B Out.
The TT23 is a certified Class 1 Mode S unit with ADS-B Out capability and includes a built-in altitude encoder plus a brighter, easier-to-read LCD screen. Trig says the new module is up to 15% lighter than earlier designs, making it suitable for aircraft where panel and installation space are tight.
Two models are available:
Trig says an STC is in development to allow integration with popular third-party navigators, as well as with its own TN70 remote GPS unit. For operators not planning to fit ADS-B Out, it functions as a straightforward Mode S transponder.
Trig emphasises that the TT23 keeps the same familiar control head used across its compact range, while adding updated internals and installation options.
Andy Davis, CEO of Trig, said the new model “takes our compact avionics product line up a notch…By including our compliant ADS-B position source in a package that is even smaller and lighter than the previous transponder, we have created a complete solution that is simple to install, and easy to use”.
The TT23 costs £2330 and the TT23G is £2650.