The KT70's design allows for easier upgrades. For instance, the newer transponder is designed to be a "drop-in" replacement for the KT70. The KT73's installation manual includes a section dedicated to "Retrofit Into Existing Kt 70, Kt 71, And Kt 76C Installations". This means that in many cases, you can remove a KT70 and install a KT73 in the same mounting tray with minimal modifications, significantly simplifying the upgrade process.
: The altitude readouts on the KT 70’s display must be explicitly cross-checked against the primary cockpit altimeter to verify flawless parallel Gray code transmission. Modern Regulatory Notice: ADS-B Out Compliance
Standby (SBY), Test (TST), Ground (GND), On (ON), and Altitude (ALT). Altitude Reporting: Supports reporting up to 50,000 ft. Programmable Features: Kt 70 Installation Manual
The KT 70 mounts directly into a standard 6.25-inch aircraft avionics stack using the dedicated BendixKing mounting sleeve.
Use a transponder ramp tester (e.g., IFR4000) to confirm mode S replies and power output. 6.0 Post-Installation (Flight Check) The KT70's design allows for easier upgrades
Ensure the kit includes the KT 70 unit, mounting tray, backshell connector kit, and antenna.
By carefully identifying your device and focusing your search, you will quickly locate the correct documentation, allowing you to install, operate, or maintain your Kt 70 equipment safely and effectively. This means that in many cases, you can
Refer to your aircraft registration paperwork to determine your specific hex/octal ICAO code, and configure the code strappings exactly as outlined in the appendix charts of the official installation document. Ground Testing Checklist
is designed with AC coupling for suppression, meaning a DC fault won't permanently disable your transponder, but proper signal timing is key to avoiding interference. 3. Remote Air/Ground Switching
: Must be connected to a compatible blind encoder (like the KEA 130A) or an encoding altimeter via a Parallel Gray Code (Gillham) interface.
Verify proper operation in flight, ensuring ATC receives correct Mode S identification and altitude reports.