RadioMaster RP4TD-M ExpressLRS 2.4ghz Mini True Diversity Receiver

RadioMaster RP4TD-M ExpressLRS 2.4GHz Mini True Diversity Receiver

The RadioMaster RP4TD-M is a nano and very lightweight 2.4GHz ExpressLRS receiver made by RadioMaster that supports Gemini Mode and only weighs one gram.

Specially made for use cases where weight and size is crucial while still providing ExpressLRS Gemini – 2 transceivers for real diversity – technology for superior interference mitigation.

This is a super compact and super lightweight version – only 1 grams – of the famous RadioMaster RP4TD ExpressLRS 2.4ghz Diversity Receiver. While it’s way smaller and more lightweight than the RP4TD, this ELRS receiver is full packed with great features.

The optimized circuit design of the RP4TD-M features two SX1281 2.4GHz radios that are combined with a TCX0 to deliver exceptional signal sensitivity, the best possible signal-to-noise ration and overal the best performance possible in all environments

The RadioMaster RP4TD-M (mini) ExpressLRS 2.4GHz Diversity receiver offers a maximum of 2x 10mW Telemetry output power for your telemetry downlink, a working voltage of DC 5V and a maximum refresh rate of up to f1000Hz.

Very suited for racing drones or any application where size and weight matters.

Except for the RP4TD-M Receiver, we also stock the RP4TD, RP1, RP2 Receiver and RP3 reciever for your choice.

Bullet points

• Mini size true diversity ExpressLRS receiver that supports ELRS Gemini mode (read more here: https://www.expresslrs.org/software/gemini/ )
• Only 1 gram and 18.1 x 16 x 2 mm (L x W x H)
• Class leading SNR and RSSI performance
• Optimized PCB design for the best heat dissipation possible
• Upgraded antenna with greater durability and performance
• Built-in TCXO (temperature compensated crystal oscillator)
• 2x 10mw RF Telemetry power output
• Compatible with all 2.4GHz ExpressLRS modules and transmitters with built in 2.4GHz ExpressLRS

TCXO (temperature compensated crystal oscillator)

The TCXO ensures high stability and accuracy in frequency control, compensating for temperature variations. This results in consistent and reliable signal reception, even in extreme temperature conditions. It also reduces frequency drift over time, providing long-term frequency stability and preventing signal degradation.

In tests, it appears that two TCXOs (one for each radio) provides the best advantages for a true diversity receiver like the RP4TD.

Click to learn more about the TCXO.

Specifications

• RadioMaster RP4TD-M ExpressLRS 2.4GHz Diversity Receiver
• Type: ISM
• MCU: ESP32
• RF Chip: SX1281 x 2
• Antenna: 65mm 2.4GHz T Antenna x 2
• Frequency Range: 2.4GHz
• Maximum Refresh Rate: 500Hz / F1000Hz
• Telemetry RF Power: Max 2x 10mW
• Working Voltage: DC 5.0V
• Weight: 1g (without antenna), 3.3g (with antenna)
• Dimension: 18.10*16.00*2mm
• Firmware Version: ExpressLRS V3.4.3 pre-installed
• FW Target: RadioMaster RP4TD-M 2400 RX
• Bus interface: CRSF

Dimensions

This ExpressLRS Gemini compatible true diversity receiver only measures 18.1mm in length, 16.00mm in width and is 2.00 mm thick.

The T antenna’s are 79mm long.