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.

CAN BE LINKED TO TN70/TN72 GPS RECEIVER IN COMBINATION WITH TA50/TA70 ANTENNA FOR FULL ADS-B OUT.

The TT21 includes:
1x TC20 Transponder Controller [00649-00]
1x TT21 Mode S Transponder [00675-00-01]
1x Complete installation kit (incl. manuals)[00668-00]
1x Mounting tray [00667-00]
1x EASA Form 1


The complete installation kit includes:
1x TT21/TT22 Transponder installation manual [00560-00]
1x TT21/TT22 Pilots operating manual [00559-00]
2x Mounting adapter (circular hole adapter for 57mm holes) [00678-00]
1x Connector Co-axial TNC [00723-00]
1x Headshell, 9 way [00725-00]
1x Headshell, 25 way [00726-00]
1x 25 way D-type contact housing (male) [00728-00]
20x Crimp terminal, male, AWG 22-24 [00729-00]
1x 9 way D-type contact housing [00727-00]
9x Crimp terminal, female, AWG 22-24 [00730-00]
4x Long mounting screws, 4-40 thread [00736-00]
4x Short mounting screws, 4-40 thread [00737-00]


Additional items you will require, but which are not in the TT21 package, include:
- Antenna and fixing hardware. The TT21 is compatible with any transponder antenna approved to ETSO C74 or 2C112 or equivalent.
- Cables. You need to supply and fabricate all required cables.
- Fixings. To secure the transponder tray to the airframe you will need at least 3 flat head screws and three self-locking nuts. If the aircraft does not have existing mounting provisions you may need to fabricate additional brackets to support the transponder tray.


The TT21 can be mounted in a standard 57 mm (2¼ inch) instrument hole, or where space is really tight, in a compact mounting just 42 mm high.

-Low Weight - less than 500 grams!
-Minimal Panel Space
-Low Power Consumption
-130 Watts Nominal Output
-Integrated Altitude Encoder
-Simple Installation
-Support for 1090ES ADS-B Out

The perfect partner to the TY91 and TY92 radios.
Dimensions:

TT22 remote unit:
Height: 48mm (1.9�)
Width: 66mm (2.5�)
Length: 160mm (6.3�)
Weight: 350g (0.77lbs)

TC20 control head:
Height: 44mm (1.8�)
Width: 63mm (2.4�)
Length: 54mm (2.1�)
Weight: 90g (0.11lbs)


ALL TRIG PRODUCTS COME WITH A 2 YEAR WARRANTY FROM DATE OF PURCHASE