Updated - Kt 70 Installation Manual

| Pin Number | Wire Color | Signal Function | Notes | |------------|------------|----------------|-------| | 1 | Red | Battery+ (VCC) | Typically 24-48V | | 2 | Blue | RX (Receive data) | From display to controller | | 3 | Black | Ground (GND) | Common negative | | 4 | Green | TX (Transmit data) | From controller to display | | 5 | Yellow | Controller lock (power switch) | Some versions use for lights |

Avoid placing the antenna directly behind landing gear doors, steps, or cargo pods that could shadow the signal during banking maneuvers. Coaxial Cable Requirements Kt 70 Installation Manual

Verify that the transmitted 24-bit ICAO address matches the assigned tail number registration exactly. 6. Troubleshooting Common Issues Issue 1: Unit displays "FAIL" or intermittent operation Cause: Low supply voltage or improper connector seating. | Pin Number | Wire Color | Signal

Note: treat manufacturer-supplied documentation, nameplate ratings, and local electrical/building codes as the authoritative sources. Use this guide to supplement and clarify common steps and pitfalls. Troubleshooting Common Issues Issue 1: Unit displays "FAIL"

The KT 70 uses a rear-mounted connector assembly. Wiring must be executed using MIL-W-22759 spec wire, and RF cables must meet low-loss attenuation requirements. Primary Pin Allocations (Molex/Edge Connector) Pin Number Wire Gauge (AWG) Aircraft Power (+14VDC or +28VDC) 2 Power Ground A Gillham Altitude Digit A1 B Gillham Altitude Digit A2 C Gillham Altitude Digit A4 D Gillham Altitude Digit B1 E Gillham Altitude Digit B2 F Gillham Altitude Digit B4 H Gillham Altitude Digit C1 J Gillham Altitude Digit C2 K Gillham Altitude Digit C4 L Gillham Altitude Digit D4 15 External Suppressor Pulse Input/Output 22 AWG (Shielded) 17 Lighting Bus (14V or 28V) Antenna RF Cable Guidelines