FrSky TD SR18 2.4GHz/900MHz Dual-Band Tandem Receiver

The FrSky TD SR18 is an 18-channel dual-band receiver that operates simultaneously on 2.4GHz and 900MHz to ensure a robust, low-latency control link. Engineered for large-scale fixed-wing builds, gliders, and complex heavy-lift platforms, the SR18 integrates a 3-axis gyroscope and a 3-axis accelerometer for advanced flight stabilization (ADV). It acts as a dedicated power distribution hub, featuring dual XT30 battery inputs capable of driving multiple high-voltage, high-torque servos without browning out the logic circuitry.

Key features

• Simultaneous dual-band (2.4GHz and 900MHz) TD mode operation
• Built-in ADV stabilization with configurable 3-axis gyro and accelerometer
• Dual XT30 power inputs for battery redundancy and heavy servo loads
• 18 configurable channel ports for PWM, SBUS, FBUS, or S.Port routing
• Built-in power switch relay, compatible with FrSky NFC or mechanical pin switches

Specifications

• Dimensions: 53 x 40 x 16 mm
• Weight: 28.9 g
• Operating voltage: 4.0V–10.0V
• Operating current: ≤185mA at 5V
• Antenna connectors: IPEX4 (2x 2.4GHz, 1x 900MHz)
• Supported protocol: TD (Tandem)

This receiver requires a FrSky Tandem series transmitter (such as the X20, X18, or X24) running ETHOS. Pin mapping, telemetry configuration, and advanced stabilization tuning are all handled directly through the radio interface without needing a computer.