RadioMaster ExpressLRS RP4TD Review – Best Receiver with True Diversity & Gemini Mode
The buzz around ExpressLRS Gemini Mode is real, but even now, there are very few receivers available that truly support this amazing feature. That’s where the RadioMaster RP4TD comes in — a major upgrade from the older RP3, which only had simple antenna diversity. Let’s check out what new features and improvements this receiver brings to the table.
🔧 Technical Specifications
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MCU: ESP32
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RF Chip: Dual SX1281
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Antenna: Dual 65mm 2.4GHz T Antennas
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Frequency Range: 2.4GHz
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Maximum Refresh Rate: 500Hz / F1000Hz
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Telemetry RF Power: Max 100mW (x2)
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Working Voltage: DC 4.5V – 12.0V
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Weight: 1.4g (without antennas)
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Dimensions: 23.7 × 16.3 × 4.0mm
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Pre-installed Firmware: ExpressLRS V3.3.0
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Firmware Target: RadioMaster RP4TD 2400 RX
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Bus Interface: CRSF
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Extend Interface: UART
⚙️ Overview
The main highlight of the RP4TD is its dual SX1281 RF chips and TCXO (Temperature Compensated Crystal Oscillators). Thanks to this smart design, the receiver performs reliably even in extreme temperatures and tough flying conditions.
With its dual RF chips, the RP4TD can deliver two telemetry outputs at 100mW each, making it a solid choice for long-range FPV flying. For pilots who want to push the limits of the 2.4GHz ExpressLRS system, this receiver is definitely worth considering.
🧱 Build Quality
On the top side, you’ll find a boot button along with two U.FL connectors for antennas.
It also has clearly labeled solder pads (5V, GND, RX, and TX) on both sides, making the wiring process easy and beginner-friendly.
