LXNAV Bridge-Trig
Connect Trig Radio, Transponder… on LXxxxx Series!

The LXNAV Bridge-Trig connects a Trig TY91 or TY92 radio or TT21 or TT22 transponder to the LXNAV RS-485 bus of an LX80x0 or LX90x0 system. It is pretty cool to select an airport in the LX80x0 or LX90x0 and have the flight computer automatically send the airport radio frequency to standy frequency in the connected radio. Or select the desired radio frequency or transponder mode from the back seat of a 2-seat sailplane when the radio display head is in the front seat.

This item can be used in any glider with LX80x0 or LX90x0 to free-up instrument panel space by eliminating the need to install a TC90 radio display head or TC20 transponder display head.

The bridge is connected to the LXNAV RS-485 bus through an LXNAV-RS485-Splitterwith DB9 connector. The LXNAV-RS485-Splitter is not included. If you don`t have spare port on your RS485 splitter you must order another LXNAV-RS485-Splitter

The LXNAV-RS485-Splitter will need a small modification before the Bridge-Trig can be attached. It is necessary to remove two HEX screws where the Bridge-Trig is to be connected and install the two included spring locks.

IMPORTANT NOTE: The Trig TT21 or TT22 transponder can be connected to either the Trig TC20 display head OR the LXNAV-Bridge-Trig - not both. It is not possible to connect to both at the same time.

It is possible to connect a TY91 or TY92 radio to both a TC90 display head and the LXNAV-Bridge-Trig - for example, in a 2-seat sailplane.

To connect an LX80x0 or LX90x0 to both a radio and transponder, 2 of the LXNAV-Bridge-Trig units are required, along with 2 ports on an LXNAV-RS485-Splitter


  • Ports: DB-9m connector with spring connectorts for LXNAV-RS485-Splitter and RJ11 6-pin connector and cable with 3 bare leads for connection to the connector on the back of a Trig TY91, TY92, TT21 or TT22.
  • Size: 60 x 40 x 15 mm (2.4 x 1.6 x 06 inches)
  • Cable Length: 38 cm (15 inches)

Overview Video: https://youtu.be/S1UNYIm2_4g


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  • Brand: LXNAV
  • Product Code: LXNAV-Bridge-Trig
  • Availability: In Stock
  • $320.00

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