OptiBeam OB6-3M 6-Element 20-15-10M Hybrid Moxon Yagi

This high-performance short boom directional triband antenna for amateur radio operators covers all five 20 through 10 meter bands with excellent SWR bandwidth. This Moxon folded element Yagi configuration fits into a small 28.2 ft. (8.6m) diameter footprint for limited space installations at the edge of a property or in a clearing between trees.

The OB6-3M is designed using advanced computer-aided simulation techniques and is carefully refined through extensive field testing. At its core lies a directly coupled 3-element driver cell, where the active elements are interconnected by a phase line made of square tubes. It features a separate reflector for the 20m and 15m bands and a dedicated director for the 10m band. A key feature is the use of Moxon-bent elements for the 20m band, reducing physical size while maintaining efficiency and improving the front-to-back ratio.

OptiBeam OB6-3M 20 Meter Moxon with 2 Elements each on 15 and 10 Meters

Physical Specifications

Boom Length: 10.17 ft. (3.10 m)

Turning Radius: 14.14 ft. (4.31 m)

Longest Element: 26.51 ft. (8.08 m)

Weight: 33 lbs. (15 kg)

Surface Area: 4.95 sq. ft. (0.46 sq. m)

Feed System: Single 50-ohm coaxial line, Balun Included

Electrical Performance

Gain (dBd / dBi @ 65 ft. above ground):

20m: 4.0 / 11.5

15m: 4.2 / 11.8

10m: 4.0 / 12.5

Front-to-Back Ratio:

20m: 25 dB

15m: 15 dB

10m: 257 dB

SWR Bandwidth

20m (14.00–14.35 MHz): 1.5:1 to 1.2:1

15m (21.00–21.45 MHz): 1.5:1 to 1.2:1

10m (28.00–29.00 MHz): 1.3:1 to 1.2:1

Element Configuration

Total Elements: 6

Active Elements:

20m, 17m, 15m: 2 each

The Optibeam OB6-3M Hybrid Moxon Yagi is a premium choice for amateur operators, offering high gain, excellent directivity, and robust mechanical design with efficient power transfer and broad bandwidth across all three bands.

OptiBeam Antenna Technology has achieved directional antennas with extraordinary electrical properties, including the highest efficiency, optimum band coverage, nearly constant gain and unchanging radiation pattern across the band, and low SWR. These antennas maintain consistent electrical characteristics under all weather-conditions and include a high power balun with UHF female connector for your 50 Ohm coaxial cable.OptiBeam Antennas are distinguished by their advanced mechanical qualities. Specially configured, stable and properly shaped element holders, robust square and round booms with effective and very solidly-built element transitions are OptiBeam exclusives. They provide advanced physical properties, including proper balance and the highest stability of the entire system. Elements are perfectly aligned and secured against torsion with minimal sag for a visually pleasing appearance. OptiBeams are made for those who understand the true value of investing in proven electrical performance and unequalled mechanical quality for the ultimate in reliability. They are built to withstand the harshest conditions using the very best materials, including high quality aluminum alloys, UV stable synthetic parts and stainless steel hardware. OptiBeam antennas are designed to be easier to build than others, arriving in subassemblies with every part carefully sorted, clearly labeled, and extremely well packed for worry-free shipment and straightforward installation.For enthusiastic operators of all pursuits, OptiBeam provides the advantage of pure performance. Proven in the field and confirmed by the most demanding hams around the world – choose OptiBeam for your station.