Reviews for Trig TT22 Mode S ADS-B capable Transponder

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Good solution to a tough problem

  • By William from Wilton CA USA on Tuesday, March 12, 2019
  • Pros: Tiny, low power requirement, remotely controlled, capable of ADS-B compliance.
  • Cons: Mounting the control head is more difficult than it should be.
  • Review: The TT22 is an excellent solution for a small homebuilt airplane and that is exactly what I am installing it into, a Sonex Onex. I installed the transponder only but left room on the mounting tray and prewired the harness to allow future installation of a Trig TN70 or TN72 for ADS-B out compliance. One small disappointment. This unit will fit in a standard 2-1/4" instrument hole but requires different pattern for the mounting screws and leaves a gap above and below the control head. With some effort I produced a decorative escutcheon and painted it to mathch the panel. The transponder included a template to be used to drill the necessary holes but would it be so much to ask to include a CNC punched esceutcheon in the box with a $2,000 device?
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