The OptiBeam OB1‑4030 Two-Band 40 and 30 Meter Rotatable Dipole is a rugged, efficient antenna built for amateur radio operators who want dependable performance on the 7 MHz and 10.1 MHz bands. With straightforward single‑feed‑line operation and durable construction, it delivers broad usable bandwidth and excellent all‑weather reliability—making it an ideal choice for operators who want simplicity without sacrificing performance.

OB1‑4030 Specifications:

Bands: 40 m (7.00–7.25 MHz); 30 m (10.125 MHz)

Gain: 0 dBd (≈ 7.0 dBi on 40 m at 65 ft / 20 m height); 0 dBd (≈ 8.1 dBi on 30 m at 65 ft / 20 m height)

Front‑to‑Back Ratio: 0 dBd (typical dipole characteristic)

SWR Performance: 40 m: 1.4:1 to 2.0:1; 30 m: 1.2:1

Maximum Element Length: 48.2 ft (14.7 m)

Turning Radius: 24.1 ft (7.35 m)

Weight: 30.9 lb. (14 kg)

Wind Area: 4.9 sq ft (0.45 m²)

Wind Load: 81.6 lb.-f (363 N)

Feed: Single 50‑ohm coax

Construction: Heavy‑duty materials rated for harsh environments

OptiBeam OB1-4030 Two-Band Rotatable Dipole 40 and 30 meters

OptiBeam's antenna technology has achieved directional antennas with extraordinary electrical properties, including the highest efficiency, optimum band coverage, constant gain, and virtually unchanging patterns across the band, with 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 solidly built element transitions are hallmarks of OptiBeam quality. They provide advanced physical properties, including proper balance and high stability over the entire system. Elements are perfectly aligned and secured against torsion with minimal sag for a visually pleasing appearance.

OptiBeam antennas 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 absolute 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, often 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 — OptiBeam is the perfect choice for your station.