Momobeam Mono4‑15 Monoband Yagi Antennas are full‑size, four‑element antennas engineered to deliver excellent SWR bandwidth, optimal gain, and strong front‑to‑back performance on the 15‑meter band. Lightweight for easy handling yet built to withstand harsh weather conditions, these antennas provide reliable performance for both standalone installations and multi‑stacked array configurations.

The MONO4‑15 performs exceptionally well in stacked systems, whether optimized for maximum forward gain or arranged to broaden directional coverage across wider geographic regions—making it a powerful choice for serious DX operators and advanced contest stations.

Constructed on a sturdy square boom, each antenna includes an assembly tool, spare hardware (bolts and aluminum tubing), and fully labeled components. All hardware is packaged in separate, clearly marked bags, and every aluminum tube is labeled to ensure fast, accurate, and stress‑free assembly.

Suitable for mast‑mount or side‑mount tower installations, the MONO4‑15 requires a medium‑duty rotator for proper operation.

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. The Mono4-10 requires a medium‑duty rotator for proper operation.

MONO4-15 Features and Specifications:

• RF Choke Balun: 3kW included

• Bandwidth@ S.W.R. ≤ 1.5:1: 450kHz

• Longest element: 23.62ft. (720cm)

• Power Handling: 10kW

• Wind Area: 5.4 sq. ft. (0.28m²)

• Wind Load: (80 MPH): (420N) 309.78 ft. lbs.

• Wind Survival*: 100 Mph (160 Km/h)

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

• Tower Lift Side: 3.28ft. (100cm) above the tower top Weight: 46.30lbs. (21kg)

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

• Tubes and Plates: Aluminum alloy 6061T6

• Hardware: stainless steel

• Insulating Clamps: polypropylene, UV resistant