The CHDB TX+RX 150 MHz radio control system (000042) is a kit for remote control of UAVs and UGVs in the enhanced 150–153 MHz band using the MIL ELRS protocol. The TX + Yagi + RX + telescopic RX configuration combines a directional Yagi antenna on the transmitter for maximum communication range and a telescopic dipole antenna on the receiver with a drone frame mount.

The maximum reported range is up to 43 km (reconnaissance aircraft, according to the manufacturer). The transmitter output power is 0.9–1.2 W, and the Backpack function allows switching video channels from the remote control without additional on-board manipulation. The solution was developed by the Ukrainian manufacturer CHDB (CherkasyDroneBud) for operation in conditions of high radio activity and limited air visibility.

The kit includes the TX V3.3 150 MIL ELRS transmitter, RX Mk4 150 MIL ELRS receiver, Yagi 150 transmitter antenna, RX 150 telescopic receiver antenna with plastic frame mount, heat shrink tubing, and soldering wires. Installation is minimal: soldering the receiver, installing the mount and deploying the antenna on the drone, connecting the TX module to the remote control with the Yagi antenna.

Key Features

• Radio control of UAVs and unmanned ground vehicles at 150 MHz.
• MIL ELRS protocol with FHSS support (on receiver).
• Enhanced operating range 150–153 MHz.
• Backpack — video channel switching from the control remote.
• Directional Yagi antenna on TX: gain 6–8 dBi.
• Telescopic antenna on RX with mount; extended length 96.5 cm.
• Firmware update via Wi‑Fi (transmitter).

Key Advantages

• Range: up to 43 km reported range with Yagi + telescopic RX kit (reconnaissance aircraft).
• Sub-GHz 150 MHz: better signal penetration compared to 2.4 GHz in complex terrain and interference conditions.
• Directional Yagi on TX: beam angle 60° (horiz.) / 65° (vert.), collapsible design 104×108 cm.
• Telescopic RX: convenient on-board folding/unfolding; frame mount included.
• Compact RX: module dimensions 20×30×6 mm, power 5 V.
• CHDB in-house production: adaptation to the needs of the Defense Forces, manufacturer's service and consultation.
• Quick retrofitting: soldering 4 contacts on the drone board — minimal integration time.

Areas of Application

• Long-range FPV and reconnaissance UAVs.
• Unmanned ground vehicles (UGVs) in EW zones.
• Tactical observation and engagement with remote control.
• Missions where control channel stability at low frequencies is critical.
• Field operations with a ground Yagi antenna and a mobile antenna on the drone.

Kit Contents (TX + Yagi + RX + telescopic RX)

• CHDB Transmitter TX V3.3 150 MIL ELRS (Backpack).
• CHDB Receiver RX Mk4 150 MIL ELRS.
• Transmitter antenna Yagi 150 (directional, 6–8 dBi).
• Receiver antenna telescopic dipole RX 150 with plastic frame mount.
• Heat shrink tubing, soldering wires.

Technical Specifications

Operating Warnings

• Orient the Yagi antenna on the transmitter towards the target (drone flight area); direction correction may be required when the ground station changes course.
• Fully extend the RX telescopic antenna before flight; do not damage sections when folding.
• Adhere to the TX power range of 6.5–24 V — exceeding the voltage may damage the module.
• Before the first flight, check TX/RX binding and Backpack settings in the MIL ELRS firmware.
• Do not bend or damage the cable from the RX to the antenna (IPEX) — use the included mount.

The CHDB TX+RX 150 MHz system (TX + Yagi + RX + telescopic RX configuration) — balances the range of the ground channel (Yagi) with a convenient on-board drone antenna: the MIL ELRS military firmware and enhanced 150 MHz band ensure stable control in challenging conditions.

Other products in this category can be found in the Ground Stations and Repeaters for FPV Drones section.