Momobeam Mono5-20 Monoband Yagi Antennas are engineered to deliver maximum performance on the 20‑meter band, directing RF energy precisely where it is needed. Designed with full‑size elements, these antennas provide impressive gain and an excellent front‑to‑back ratio, ensuring a strong, reliable signal across the entire band. Due to their substantial physical size, the MONO5‑20 antennas incorporate reinforced mechanical solutions that enhance overall durability and structural integrity.

Built on a sturdy square boom, they include an assembly tool along with spare bolts and aluminum tubing, with all components packaged in clearly labeled bags and each aluminum tube individually marked for fast, straightforward assembly. These antennas can be mounted on a mast or side‑mounted on towers and require a heavy‑duty rotator capable of supporting a large load.

A 3kW RF choke balun is included as standard equipment—an essential component that many manufacturers offer only as an optional upgrade. Momobeam RF Chokes are built using high‑quality, low‑loss, double‑shielded coaxial cable with a Teflon dielectric, combined with carefully selected ferrite material sleeved over the cable. Together, these elements create a high‑impedance path for RF, providing excellent isolation between the antenna and the coaxial feedline.

MONO5-20 Features and Specifications:

• RF Choke Balun: 3kW included

• Bandwidth@ S.W.R. ≤ 1.5:1: 350kHz

• Longest element: 36.09ft. (1100cm)

• Power Handling: 10kW

• Wind Area: 12.39 sq. ft. (1.15m²)

• Wind Load: (80 MPH): (936N) 690.36 ft. lbs.

• Wind Survival*: 100 Mph (160 Km/h)

• Tower Leg/Mast Diameter: 2.0-2.36in. (50/60mm)

• Tower Lift Side: 8.86ft. (270cm) Weight: 176.37lbs. (80kg)

• Feedline Connector: (1) 50-Ohm UHF SO-239 female

• Tubes and Plates: Aluminum alloy 6061T6

• Hardware: stainless steel

• Insulating Clamps: polypropylene, UV resistant