Kt 70 Installation Manual Best [ Fully Tested ]
Signal and altitude encoder lines require 22 AWG or 24 AWG wire.
Use high-quality coaxial cable to prevent signal attenuation. For cable runs under 10 feet, use or RG-142B .
Once the physical installation and wiring are complete, a formal test sequence must be performed before the unit is certified for flight. Ground Bench Test
Secure a continuous supply of cooling air to the rear of the unit. Connect a 1-inch cooling hose from the aircraft's forced air plenum to the cooling port on the mounting rack. Antenna Placement Kt 70 Installation Manual
Access the maintenance menu to set the aircraft address (hex code), flight ID, and altitude encoder type. Ground Test: Apply power and check for error messages. Verify the unit displays the correct altitude.
Step the altimeter through several thousands of feet. Verify that the transponder reads out the correct altitude on the test set without missing bits.
: Following any installation or modification, the system must undergo a formal certification test. In the United States, this must comply with 14 CFR Part 43, Appendix E and F , which verifies altitude reporting accuracy and transponder performance. Signal and altitude encoder lines require 22 AWG
: This is an aircraft component. A Mode S transponder is a critical part of the air traffic control (ATC) system.
This is the most complex of the three. The Bendix/King KT70 is a sophisticated piece of avionics, and its installation is not a typical DIY job. The "installation manual" for this device is a technical document intended for certified avionics technicians. However, understanding its contents is important for aircraft owners and pilots.
The external suppression line must be daisy-chained to other onboard pulse-transmitting avionics (such as DME or TCAS systems). This link blanks the transponder's receiver when other high-frequency equipment transmits, protecting internal circuitry from signal overload. Antenna Installation and RF Cabling Once the physical installation and wiring are complete,
The KT 70 complies with TSO C112 (Mode S Airborne Transponder System).
Must be between 125 Watts minimum and 500 Watts maximum at the antenna.
If you are flying with other high-power equipment (like a DME), ensure the line is correctly wired. The
Turn the front-panel hex insertion screw clockwise using a 3/32-inch Allen wrench to lock the unit into the rear connector.