Picture of product KT-78A

Part #: 066-1062-01

Model: KT-78A





Part Number :





  • 4096 code, Mode A/C, Class 1A, panel-mounted ATC transponder
  • Altitude reporting capability
  • System test feature
  • All encoder and decoder functions built into single, plug-in Large Scale Integration chip
  • IDENT button may be remotely mounted
  • 14 volt, but can be 28V with optional conversion kit
  • 113 watts peak minimum transmitter power instead of 200 watts for KT-76A
  • Operates up to 15,000 feet instead of 35,000 feet for KT-76A
  • Same as KT-76A except DOES include above two features
  • TSO'd


Size: 6.25"W x 1.63"H x 10.0"L Weight: 3.1 lbs.
Applicable Documents: TSO C74b, RTCA DO-138, DAPBBBXXXXXX Class II Temperature Range: -15 to +55C for continuous operation
Transmitter Frequency: 1090 MHz +-3 MHz Receiver Frequency: 1030 MHz (crystal controlled local oscillator
Receiver Sensitivity: -74dBm (nominal); -72dBm (min. for 90% reply) Mode A Capability: 4096 identity codes plus Special Identification Pulse
Mode C Capability: Accepts standard ICAO Altitude Transmission Code digitizer output, reporting in 100 ft. increments from -1000 ft. up to 63,000 feet Side Lobe Suppression: 3 pulse
Part Number: Description:
066-1062-01 Transponder


Click on a question below to see the answer. If you have a question about this model that is not answered below, please contact questions@seaerospace.com

In relation to NE (New) parts, many OEMs change their prices and availability without any notice to dealers or the industry. Therefore, through the REQUEST or RFQ indication, we ask that customers contact us for the most accurate price and availability.

In relation to SV & OH parts, the used parts aftermarket in the aviation industry is not an infinite supply. It is a dynamic, constantly changing market that is significantly affected by and susceptible to highs and lows in supply and demand. Therefore, although we attempt to, at times, we are unable to predict the exact moment when an item may be available. Once again, through the REQUEST or RFQ indication on our website, we ask that customers contact us for the most current and accurate price and availability.

The KT-78A is simply a low power version of the popular KT-76A transponder. The KT-78A peak power is 113 watts minimum while 200 watts for the KT-76A. The KT-78A was originally designed for low flying aircraft that operated in very local areas such as crop dusting (agriculture) applications. Both the KT-76A and KT-78A are 14 volt radios that utilize the same mounting rack and connector. Therefore, the higher power KT-76A is an ideal direct replacement for the KT-78A considering that the KT-78A has not been manufactured for many years and is therefore scarce on the used market.