Trig Avionics Shaves Weight, Adds Features With TT23 Transponder Launch

New unit includes options to suit experimental and certified aircraft.

Trig Avionics has launched its TT23, the latest evolution of its line of compact transponders. The company, which is a unit of Dynon, said the new design is smaller and up to 15 percent lighter than the popular TT21 and TT22 models that preceded it.

Because the TT23 is a certified Class 1 Mode S transponder, it is suitable for VFR and IFR operations and attractive to a wide range of pilots. Its small footprint makes it ideal for aircraft with limited space on the panel while certain options enhance its versatility.

There are two versions of the new transponder. The TT23G has a built-in GPS receiver and is aimed at pilots who want a system with integrated ADS-B Out. This version is tailored for pilots of experimental and light sport aircraft who wish to meet ADS-B requirements in the U.S. or simply to enhance safety worldwide in airspace not requiring ADS-B.

The standard TT23 shares the same compact architecture but does not include its own GPS. This version is designed for installation in aircraft that already have a compatible GPS system on board. It is meant to be an ideal solution for type-certified aircraft in the U.S.

Trig said an STC will be available to integrate the TT23 with popular third-party GPS navigators, as well as its own Trig TN70 GPS.

“The new TT23 transponder takes our compact avionics product line up a notch,” said Andy Davis, CEO of Trig Avionics. “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.”

For pilots who do not intend to equip their aircraft with ADS-B

Out, the TT23 model remains an attractive, modern transponder with a built-in altitude encoder, user-friendly controls, and a bright, easy-to-read LCD screen. 

The TT23 and TT23G are available through approved Trig Avionics dealers worldwide.