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Trig TT21 Class 2 Mode S Transponder - Class 2 Transponder

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Trig TT21 Class 2 Mode S Transponder - The Trig TT21 is a two part transponder system, which includes an integrated altitude encoder. In design and technology it is equivalent to the TT22, however, the transmitted output power of the TT21 is lower, qualifying the unit as a Class 2 transponder. Class 2 transponders are suitable for aircraft cruising slower than 175 knots, and operating below 15,000 feet, VFR or IFR. If you NEVER exceed these limits either because the aircraft isn't capable or because you ... - Trig Avionics

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Displaying all 12 reviews

Mike Malone

1 year ago

Date of purchase: 14/06/2023

Dynon EGT Clamp Probe (100405-000)

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No problems at all with my purchase.

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Trusted Customer

4 years ago

Date of purchase: 26/08/2020

Dynon EGT Clamp Probe (100405-000)

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I didn’t buy a trig! However the Dynon accessory looks promising. Replacement part on a trial basis. Saves buying a part that I don’t need. Can’t argue with that.

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Grenet Georges

Boissy Saint Leger

5 years ago

Date of purchase: 23/05/2019

Dynon EGT Clamp Probe (100405-000)