Kt 70 Installation Manual

Navigating the technical landscape of vintage avionics can be a challenge, especially when dealing with safety-critical hardware like the Bendix/King KT 70

Mode S Transponder. Whether you're a mechanic or a dedicated enthusiast, having a handle on the official installation manual is essential for a proper setup. The Bendix/King KT 70 Installation Manual: A Complete Guide Bendix/King KT 70

was a pioneer in the "Silver Crown" line, offering Mode S compatibility in a compact, panel-mounted design. To install it correctly, you need the official documentation—specifically Manual #006-00673-0002 (or the earlier 006-00673-0001). 1. Manual Overview & Key Specifications The KT 70 installation manual typically spans about Kt 70 Installation Manual

and covers everything from mechanical mounting to electrical pinouts. Power Requirements: 11–33VDC, with a maximum of 35W. Operating Limits:

Certified up to 50,000 feet and temperatures from -20° to +55°C. Key Functions: Navigating the technical landscape of vintage avionics can

Mode A, C, and S replies, altitude reporting, and a programmable VFR code. 2. Critical Installation Steps

The manual is divided into several logical sections to ensure a safe and compliant installation: Bendix/King KT 70 & KT 71 Transponders | PDF - Scribd Ensure all covers are closed

Critical P Parameters (Basic Setup)

| Parameter | Function | Recommended Setting | |-----------|----------|----------------------| | P1 | Motor pole pairs × reduction ratio | (Number of magnets ÷ 2) × gear ratio. For direct drive: poles/2. Common: 46, 100 | | P2 | Wheel speed sensor magnets | 1 (for external sensor), 6 (for internal DD hub) | | P3 | Battery voltage (1=36V, 2=48V, 3=24V, 4=36/48 auto) | Match your pack | | P4 | Throttle type (0=voltage, 1=current) | 0 for most KT controllers | | P5 | Assist sensor type (0=PAS, 1=T_Sensor) | 1 for torque simulation, 0 for basic PAS | | P6 | Wheel diameter (inches) | 16, 20, 26, 27.5, 700c, 29 |

Initial Power-Up and Checks

  1. Ensure all covers are closed.
  2. Turn ON supply power.
  3. Observe LED indicators and display for normal status:
    • Power LED steady = OK
    • Fault LEDs or error codes — consult troubleshooting
  4. Verify input voltages at terminals with multimeter.
  5. Check for unusual noises, smells, or heating — if present, power down and inspect.

Step 5: Final Power Check

Reconnect the battery. Press and hold the Power button (center top) on the Kt 70 for 2 seconds. The screen should light up showing voltage, speed, and assist level.

If nothing happens:

KT 70 Installation Manual

Chapter 5: Step-by-Step Electrical Installation

Chapter 4: Step-by-Step Installation Walkthrough

Following the Kt 70 Installation Manual sequence ensures success. Do not power on until all steps are checked.