Momobeam Tetra17-FS 40/20/15/10M Full-Size Yagi Antennas are designed to deliver the performance, reliability, and ease of use that contesters and demanding HF operators expect. These quad‑band antennas offer full‑size elements on every band, ensuring maximum efficiency, excellent gain, and wide operating bandwidths—all without the use of traps. Their compact mechanical design brings together high performance and reduced tower footprint, making them an ideal choice for stations looking to significantly upgrade capability across multiple HF bands.

Each Tetra17‑FS antenna is engineered using advanced modeling software that carefully defines the spacing and geometry of all elements. The result is a fully optimized array that delivers stable SWR curves, strong forward gain, and clean radiation patterns. Combined with Momobeam’s well‑known mechanical durability and robust construction standards, these antennas represent a uniquely powerful balance of electrical performance and long‑term reliability.

Assembly has been intentionally designed to be simple and intuitive. The Tetra17‑FS antennas use a strong square boom for superior alignment and structural stability, and all aluminum tubes and hardware are clearly labeled to streamline the installation process. Hardware is packaged in organized, marked bags, allowing operators to complete assembly efficiently and confidently.

These antennas require only a single coax feedline for operation, thanks to their unified feed design, and they are built to handle the demands of heavy-duty rotators suitable for multi‑band Yagi of this size. Each antenna also includes a high‑quality 3 kW RF choke, supplied as standard equipment to ensure proper current balance and clean RF behavior at the feed point.

Momobeam Tetra17-FS 40/20/15/10M Full-Size Yagi Antennas provide a remarkable combination of high performance, wide bandwidth, rugged construction, and user‑friendly assembly. Their full‑size, trap‑free design sets them apart from conventional multiband solutions, offering contest‑grade capability in a compact footprint. For operators who want exceptional results across four major HF bands without the compromises typical of multiband arrays, the Tetra17‑FS stands out as a truly exceptional choice.

Tetra17-FS Features and Specifications:

• RF Choke Balun: (1) 3kW included

• Bandwidth@ S.W.R. ≤ 1.5:1:

40M - 200kHz

20M – 350kHz

15M – 450kHz

10M – 800kHz

• Longest element: 72.83ft. (2220cm)

• Power Handling: 10kW

• Wind Area: 27.34 sq. ft. (2.54m²)

• Wind Load: (80 MPH): (2072N) 1528.23 ft. lbs.

• Wind Survival*: 100 Mph (160 Km/h)

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

• Tower Lift Side: 2.95ft. (90cm) Weight: 352.74lbs. (160kg)

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

• Tubes and Plates: Aluminum alloy 6061T6

• Hardware: stainless steel

• Insulating Clamps: polypropylene, UV resistant