RadioMaster RP3-H ExpressLRS 2.4GHz Nano Receiver, Dual Antenna, TCXO, CRSF/S.Bus for Helicopters

Overview

The RadioMaster RP3-H ExpressLRS 2.4GHz Nano Receiver is designed for use with the Nexus Control System and is compatible with CRSF/S.Bus enabled flight controllers. It features a rugged integrated housing for modern helicopter frames, built-in TCXO oscillators for stable RF performance, and an Ext-V telemetry input for older ESCs that do not provide battery voltage telemetry via the control unit. Built-in WiFi supports firmware updates without removing the receiver.

Key Features

• Perfect for helicopters and applications needing a rugged cased serial receiver
• Plug'n'play, solder-free receiver compatible with NEXUS Heli flight controller
• Dual-antenna diversity (antenna switching) for improved signal stability and range
• Low Noise Amplifier (LNA) for better receiver range
• Skyworks SKY66112 power amplifier (PA) for improved telemetry performance (up to 100mW telemetry RF power)
• Optimized PCB design for better heat dissipation
• Built-in TCXO (temperature compensated crystal oscillator)
• Auto-detects voltage telemetry from external battery voltage or receiver battery/ESC BEC voltage
• Supports LoRa and FLRC 2.4GHz RF links
• Compatible with all 2.4GHz ExpressLRS modules and transmitters with built-in 2.4GHz ExpressLRS
• Receiver label markings include: BOOT, TX, RX, and EXT-V

Specifications

TCXO (temperature compensated crystal oscillator)

The built-in TCXO oscillators help maintain stability and accuracy in frequency control across temperature changes, supporting consistent signal reception and reduced frequency drift over time. Reference: https://www.expresslrs.org/hardware/crystal-frequency-error

Dimensions

• Specification: 28 x 24 x 8mm
• Dimension diagram labels: 28.00MM, 15.40MM, 8.00MM

Applications

• Helicopters (rugged cased serial receiver for modern heli frames)
• CRSF/S.Bus receiver installations requiring Ext-V telemetry input support

For installation help or order support, contact support@rcdrone.top or visit https://rcdrone.top/.

What’s Included

• 1 x RP3-H ExpressLRS 2.4GHz Nano Receiver
• 2 x 150mm IPX1 2.4GHz T Antenna (installed)
• 1 x JST-GH CRSF 4 wire Pigtail
• 1 x JST-GH 4 wire to JST-GH CRSF cable
• 1 x JST-GH 4 wire to single Servo pin (single dupont connectors)
• 1 x Voltage telemetry wire
• 1 x Quick start guide

Manuals

• RP3-H Receiver User Manual (PDF)

ExpressLRS project information: https://www.expresslrs.org/

Rotorflight project information: https://www.rotorflight.org/

Details

The RadioMaster RP3-H ExpressLRS 2.4GHz Nano Receiver is built for rugged helicopter installs and CRSF/S.Bus flight controllers.

Dual TCXO oscillators help keep the link stable by reducing frequency drift in changing conditions.

Plug-and-play wiring makes it easy to connect to the NEXUS Heli flight controller without soldering.

A tough integrated housing fits modern heli frames, with an EXT-V input for battery voltage telemetry on older ESC setups.

An onboard LNA and PA are designed to improve reception and support up to 100mW telemetry RF power.

Dual-antenna diversity improves signal stability and helps maintain control in challenging orientations.

An optimized PCB layout is designed to dissipate heat efficiently during demanding use.

Key specifications are summarized for quick compatibility checks, including CRSF/S.Bus and supported refresh rates.

Everything needed for common installs is included: the RP3-H receiver plus telemetry and connection cables.