Momobeam TRI9‑SF Separate Feed 20/15/10 Meter Yagi Antennas are an ideal solution for operators seeking high‑performance tri‑band antennas with independent feed points. Each band is equipped with a full three‑element configuration—reflector, driver, and director—providing excellent gain, pattern control, and operating efficiency across 20, 15, and 10 meters. These antennas deliver balanced, consistent performance that appeals to both contesters and demanding DX enthusiasts.

TRI9‑SF antennas are perfectly suited for expanding contest stations and multi‑operator environments. Their separate‑feed architecture allows three operators to transmit simultaneously, each using a dedicated band, effectively functioning as if three individual monoband antennas were installed. When paired with appropriate band‑pass filters to protect equipment, this setup significantly optimizes tower space and reduces the complexity normally associated with multi‑band installations.

This separate‑feed approach brings several key advantages to station design: fewer antennas are required overall, wind load on the tower is reduced, no external diplexer or triplexer is needed, and multi‑antenna or multi‑band stacking becomes simple to configure if desired. The result is a cleaner, more efficient station layout with improved upgrade potential for competitive operating.

Each TRI9‑SF antenna includes a complete accessory package, featuring an assembly tool and spare parts such as bolts and a pair of aluminum tubes. Three high‑quality 3kW RF choke baluns are supplied as standard—valuable components that many antenna manufacturers offer only as optional add‑ons. Their inclusion ensures excellent feed‑line isolation and cleaner operating conditions across all three bands.

Assembly is straightforward and intuitive. The antennas use a square‑boom design, and all hardware is organized in individually labeled bags, with each aluminum tube clearly marked for quick identification. This thoughtful packaging makes installation fast, accurate, and stress‑free, even for operators assembling complex multi‑antenna systems.

TRI9‑SF antennas require three coaxial cables and a medium‑load rotator for proper operation. With their combination of robust engineering, multi‑transceiver capability, and space‑efficient design, these antennas offer a powerful solution for serious Amateur Radio operators looking to enhance their contesting capabilities with minimal tower real estate.

TRI9 Separate Feed 20/15/10 Features and Specifications:

• RF Choke Balun: (3) 3kW included

• Bandwidth@ S.W.R. ≤ 1.5:1:

20M – 350kHz

15M – 450kHz

10M – 800kHz

• Longest element: 36.09ft. (1100cm)

• Power Handling: 10kW

• Wind Area: 10.01 sq. ft. (0.93m²)

• Wind Load: (80 MPH): (1012N) 746.41 ft. lbs.

• Wind Survival*: 100 Mph (160 Km/h)

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

• Tower Lift Side: 2.62ft. (80cm) Weight: 88.18lbs. (40kg)

• Feedline Connector: (3) 50-Ohm UHF SO-239 female

• Tubes and Plates: Aluminum alloy 6061T6

• Hardware: stainless steel

• Insulating Clamps: polypropylene, UV resistant