Momobeam RFC‑DU 5kW RF Choke Baluns provide an excellent balance of currents and ensure a proper transition between balanced resonant antenna systems (with low SWR)—such as dipoles and Yagi antennas—and unbalanced coaxial feedlines.

These RF Chokes are highly effective at suppressing common mode current from flowing along the exterior of coaxial feedlines, a condition that can cause several issues, including:

- Increased noise levels

- Inaccurate SWR meter readings

- Interference affecting electronic devices within our shack or near the antenna system

See the "Recommended Parts" section for genuine Momobeam Choke/Balun Mounting Brackets, available for compatible square and round Momobeam antenna booms.

Additional Features and Specifications:

• RF Choke Type: Current Balun

• Frequency Range: 7-50MHz

• Power Rating: 5kW PEP* 1250W Digital Modes

• Materials: Coaxial cable insulated with Teflon, and surrounded by ferrite beads

• Enclosure Type: PVC

• Ratio: 1:1, 50-Ohm

• Termination Type: SO-239 with PTFE / Two 1.97-inch (5cm) wires to be soldered to M6 Ring terminals

• Common Mode Rejection: Up to 20dB

• Insertion Loss: <1dB

• Length: 17.72in. (45cm)

• Weight: 0.77lbs.(0.35kg)

Important: *Digital modes such as FT8 and similar, whose duty cycle is very stressful, we recommend using a power not exceeding 25% of the applicable power of the RF Choke!

A higher applied power could cause irreversible damage!