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Description
Part #
List Price
Availability
TT31 Transponder
KT-76A Plug-In Replacement
00220-00-01
$2,977
On Sale! Call for Price
In Stock
TT31 System
Includes Tray & Install Kit
00225-00-01
$3,077
On Sale! Call for Price
In Stock

TT31 Mode S Transponder

P/N 00220-00-01 - Transponder Only (for Plug-In Replacement for KT-76A/78A)
P/N 00225-00-01 - Includes Tray and Install Kit for new installations

The TT31 is a power efficient, inexpensive, Mode S general aviation transponder. The TT31 meets the European elementary surveillance requirements, and fits the same mounting tray as the popular KT76A/78A transponder, making it ideal for both new and retrofit installations.

The TT31 front panel has a backlit graphic display that provides easy access to the transponder functions, including setting of the Flight ID. Squawk code and Flight ID input uses a conventional rotary knob, and all functions are easily operated.

Meet Current and Future Mandates

The TT31 transponder is an ED-73B Class 1 compliant Mode S level 2 datalink transponder, with support for extended squitter. It meets all the current requirements for non-diversity Mode S elementary surveillance transponders in Europe for both IFR and VFR flight.

The TT31 also supports 1090 MHz Automatic Dependent Surveillance Broadcast (ADS-B) extended squitter, known as “ADS-B out”. By linking the TT31 to your existing GPS receiver, the TT31 can transmit position information to appropriately equipped ground stations and other aircraft. This provides improved airborne surveillance, provides vital information for airport ground surveillance, and is a key feature of future airspace plans.

Low Power Design

The TT31 uses as little as half the electrical power of the leading competitor, and half the power of most legacy transponders, whilst still retaining a fully backlit display and transmitting a higher power signal. This is achieved by using modern high efficiency design techniques and making best use of the power available.

One of the biggest reliability challenges for General Aviation avionics products is heat, and by reducing power consumption, we have significantly reduced waste heat in the avionics stack. This means greater reliability for ALL your avionics, not just the TT31, and puts less load on the electrical system and battery of your aircraft.

Flexible Installation

The TT31 is designed to be compatible with both legacy and new panels. The flexible power input means that 14 volt and 28 volt systems can be accommodated without any special configuration or dropper resistors (we recommend that any dropper resistor fitted for a previous transponder should always be removed). Automatic and manual panel lighting selections mean that an attractive presentation will be available in the simplest panel installations. And the TT31 is compatible with both parallel and serial altitude encoders; it can even act as a serial altitude repeater to provide a convenient altitude source for your GPS. Mechanically the TT31 follows an industry standard form factor, and if you are upgrading from a KT76A or KT78A transponder, the TT31 is a simple plugand- play replacement.

Download the TT31 Operating Manual (PDF)
Download the TT31 Installation Manual (PDF)

Features

* Mode A, C, S
* Supports TIS-A on Garmin 396/496/696
* Low Power Consumption
* No Cavity Tube
* 240 Watts Nominal Output
* Plug and Play Installation
* Backlit LCD Display
* Easy to Use Rotary Knobs
* Timer/Stopwatch Function
* Altitude Monitor
* Certified 1090ES ADS-B out

Specifications

* Type: Class 1 Mode S Level 2 Datalink
* Certification: ETSO 2C112b, TSO C112 166B
* Compliance: ED73B, DO160D, DO178B level B, DO181C, DO260A
* Supply Voltage (DC): 10 – 33 V
* Typical Current Consumption: Idle: 0.22 A
* (at 14V) Active: 0.45 A
* Transmitter Power: 240W nominal at connector
* Operating Temperature: -20 to +55 C
* Cooling Requirement: No fan required
* Weight: 2.98 lbs