Unlike older Mode A/C transponders, the KT 70 requires a unique 24-bit ICAO aircraft address.
If youI can provide details on , mapping out the exact gray code encoder pins , or calculating the RF signal loss for your specific coax cable run. Share public link
Ensure all ground pins are securely connected to the airframe ground to reduce electrical noise. 5. Configuration and Post-Installation Checkout
Ensure a flat, unpainted, conductive aluminum surface area of at least 12 square inches to act as a proper RF ground plane. Coaxial Cable Requirements Kt 70 Installation Manual
This code is programmed directly into the transponder harness using a series of jumper wires grounded to specific pins on the rear connector.
Slide the KT 70 unit into the tray, engaging the rear connector securely. Lock the unit in place using the front fastening screw. 4. Electrical and Wiring Installation
The BendixKing KT 70 is a TSO-certified Mode S transponder designed to provide reliable altitude reporting and surveillance data to Air Traffic Control (ATC). Proper installation is critical to ensure compliance with aviation regulations, optimize signal transmission, and prevent electrical interference. Unlike older Mode A/C transponders, the KT 70
: Must be connected to a compatible blind encoder (like the KEA 130A) or an encoding altimeter via a Parallel Gray Code (Gillham) interface.
Before beginning the installation, proper planning is essential.
Install the antenna according to the manual's specifications, maintaining a significant distance from other antennas (e.g., GPS, VHF) to prevent interference. Slide the KT 70 unit into the tray,
Route parallel Gillham gray code wires using 22 AWG shielded twisted pairs. Ground the shields only at the transponder backplate chassis ground point.
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200 Watts minimum pulse power at the antenna. TSO Compliance: TSO C112 (Class 2A). Weight: 3.1 lbs (1.41 kg) with mounting rack. Required Tools and Equipment