TT26 ADS-B Transponder Installation Manual
24 January 2017
01633-00
Issue AC
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Trig Avionics Limited
17
compliant, so the combination will crimp the supplied connectors.
Once crimped, the contacts should be slotted into the rear of the connector
shell. Push the contact in until the retaining tab clicks into place. Tug gently
to confirm the contact is locked in place.
5.7 Wiring Considerations
The connection from the TT26 transponder to the aircraft and controller uses a
minimum of four (4) signal lines; the TMAP pair and the Power and Ground
pair, although it is good practice to add additional ground wires to the
interface. In a certified installation the normal wire choice would be Tefzel
hook-up wire. Wire of 20 AWG is more than adequate for the task; in
installations where weight is an issue, wire of 22 or 24 AWG can also be used.
Where lighter wires than 20 AWG are used the individual wires should be
laced together for support.
5.8 GPS Antenna
The TT26 is compatible with any GPS antenna approved to ETSO or TSO
C190.
The following table shows recommended antennas.
Antenna Manufacturer
Antenna Model
TSO
Trig Avionics
TA70
TSO-C190
Cobham Antennas
(Comant)
CI 429-200
CI 419-200
TSO-C190
TSO-C190
Sensor Systems Inc
S67-1575-135
S67-1575-145
S67-1575-137
TSO-C190
TSO-C190
TSO-C190
5.9 GPS Antenna Cable
A low loss cable terminating at the TT26 in an SMA connector is required.
The recommended cable is RG400 or RG142. Total cable loss including
