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KT 74

Used For:

ADS-B Ready Mode S Transponder

  • Overview
  • Demos
  • Specs
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Now FAA TSO C166b*

Airspace is changing, and so is the technology needed to optimize the accuracy and situational awareness within this airspace. Regardless of how things change, the BendixKing commitment to meeting the needs of the pilot and a legacy of creating affordable optimized avionic solutions will continue into the future.
The KT 74 not only meets the global mandates for Automatic Dependent Surveillance-Broadcast (ADS-B) Out**, but as a plug and play, slide-in replacement for the popular BendixKing KT 76A/C and KT 78A transponders, provides a simple and economical upgrade path for ADS-B and more: 
Additional KT 74 Benefits:
Push button operation
New sleek design
Most affordable Mode S Transponder with ADS-B Out
Low power consumption
Stopwatch and timer
Altitude monitor
Built-in altitude repeater instead of a second altitude encoder
TIS-A Traffic output
The feature-rich KT 74 brings the value, simplicity, reliability and affordability into the cockpit that BendixKing has been trusted for since 1959. 
* See Specification for complete Regulatory Compliance  list
** When coupled with approved GPS source, STC and install kit required.


KT 74 Mode S Transponder Demonstration Video
If a new transponder is on your “to-get” list, you might want to choose one that’s both relevant now and in the future. The KT 74 transponder from BendixKing is the easiest upgrade to the popular KT 76A/C and KT 78A models, with a ‘plug and go’ capacity. And it’s ADS-B compliant, therefore meeting 2020 requirements. It’s low-cost, easy to install and fits into your existing panel. Take a look at this brief video demo to learn more!

Technical Specifications

Type Class 1 Mode S Level 2 els
Certification TSO C112D, C166B and ETSO C112C, C166B
Compliance DO-160G, DO-181E, DO-260B Class B1S, DO-178B Level B, DO-254 Level C
Supply Voltage (DC) 11 - 33 V
Typical Current Consumption
(at 14V)
Idle: 0.22 A, Active: 0.45 A
Nominal Transmitter Power 240 W at connector
Operating Temperature -25 to +70
Cooling Requirement No fan required
Weight 1.35 kg
Dimensions H 43mm (1.7”)
W 160mm (6.30”)
L 272mm (10.7”)



KT 74 Brochure Download
KT 74 Pilot's Guide Download