BIG SIGNAL 2BS-15
2-element full-wave Cubical Quad for DX on 21 MHz / 15 meters
The BIG SIGNAL 2BS-15 is a 2-element full-wave monoband directional antenna specifically developed for operators looking for gain, directivity and clean reception on the 21 MHz / 15-meter band.
Its two-element configuration provides an excellent balance of performance, physical size and turning radius, making it an especially attractive option for DX stations looking to step up to a directional antenna without requiring a large installation.
Band: 21 MHz / 15 m
Type: monoband directional Cubical Quad
Elements: 2 full-wave loops
Gain: 7.40 dBi free space
F/B ratio: 18.02 dB
Polarization: horizontal
Turning radius: 10.24 ft (3.12 m)
Recommended use: DX / weak-signal / space-limited stations
Why Choose the BIG SIGNAL 2BS-15?
• Two full-wave elements
The 2BS-15 uses two closed full-wave loops specifically optimized for 21 MHz. This configuration is designed to make efficient use of each element without relying on traps, loading coils or physically shortened radiators.
• 7.40 dBi from only 7.64 ft (2.33 m) of boom
Its two-element configuration provides 7.40 dBi of free-space gain with a boom length of only 7.64 ft (2.33 m), offering an excellent balance between performance and physical size.
• Clean reception for weak signals
The closed-loop geometry, combined with horizontal polarization and a directional radiation pattern, can provide favorable signal-to-noise performance in the presence of certain types of electrical interference, particularly useful in urban environments.
• Directivity designed for DX
With an 18.02 dB front-to-back ratio, the 2BS-15 helps concentrate transmitted and received energy toward the desired direction while reducing signals arriving from behind the antenna.
• Wide 74° beamwidth
Its 74° -3 dB beamwidth provides broad angular coverage for a directional antenna, making it easier to work DX stations without requiring constant azimuth corrections.
• Only 10.24 ft (3.12 m) turning radius
The 2BS-15 maintains compact dimensions for a full-wave antenna on 15 meters, making it an especially attractive choice for installations where rotational clearance is limited.
• Rugged outdoor construction
Its structure combines carefully selected materials to provide rigidity, mechanical strength and long-term durability in permanent outdoor installations.
• Current balun included
The antenna includes a high-quality current balun, rated for up to 2,000 W PEP, to provide proper feeding from a 50-ohm coaxial line.
A Compact Cubical Quad for DX on 15 Meters
The BIG SIGNAL 2BS-15 is designed for operators looking for a dedicated 21 MHz directional antenna with a particularly favorable balance of gain, size and ease of installation.
• 2 full-wave elements.
• 7.40 dBi free-space gain.
• 18.02 dB front-to-back ratio.
• 74° -3 dB beamwidth.
• Only 7.64 ft (2.33 m) of boom.
• Turning radius of 10.24 ft (3.12 m).
• Current balun included.
• Specifically designed for DX on 15 meters.
Two Elements. 7.40 dBi. A Compact Way to Work DX on 15 Meters.
The BIG SIGNAL 2BS-15 combines two full-wave elements, directivity and compact dimensions in a monoband antenna designed to make the most of DX opportunities on 21 MHz.
Technical Specifications
Band: 21 MHz / 15 m
Elements: 2 full-wave elements
Gain: 7.40 dBi (free space)
F/B ratio: 18.02 dB
Polarization: horizontal
-3 dB beamwidth: 74°
SWR: 1.1:1 ~ 1.5:1
Impedance: 50 Ohms
Balun: included
Maximum power: 2,000 W PEP
Boom length: 7.64 ft (2.33 m)
Turning radius: 10.24 ft (3.12 m)
Overall height: 9.65 ft (2.94 m)
Weight: to be confirmed
Wind survival: > 93 mph (> 150 km/h)
Wind load: 6.64 ft² (0.617 m²) | 108.8 lbf (483.9 N) | @ 74.6 mph (120 km/h)
7.40 dBi from only 7.64 ft of boom
The BIG SIGNAL 2BS-15 combines 7.40 dBi of gain, an 18.02 dB front-to-back ratio and a 74° -3 dB beamwidth, while maintaining a boom length of only 7.64 ft (2.33 m).
Construction and Materials
• Boom-to-mast plate
Heavy-duty 9.84 x 5.91 x 0.31 in (250 x 150 x 8 mm) structural plate, sized to provide a strong and stable connection between the boom and mast.
• Boom
Round 1.97 in diameter x 0.079 in wall (50 x 2 mm) tubing, designed to provide the required structural rigidity while keeping the overall weight under control.
• Spreader support system
Constructed from 1.18 x 0.20 in (30 x 5 mm) angle profiles and incorporating a 0.16 in (4 mm) boom stabilizing element to increase overall rigidity and structural stability.
• Fasteners and hardware
Made from W4 stainless steel, selected to provide mechanical strength, corrosion resistance and long-term durability in outdoor installations.
• Fiberglass system
Custom-made fiberglass tubing with a half-round (semicircular) cross-section rather than conventional round tubing, specifically designed to fit the surface of the spreader supports. Reinforced with fiberglass fabric and UV protection for increased mechanical strength and long-term outdoor durability.
• BIG SIGNAL Wire by Messi & Paoloni
Special copper wire with a polyethylene (PE) jacket, selected to provide excellent weather protection and high mechanical strength.
• Feed system
Equipped with a high-quality current balun, rated for a maximum power of 2,000 W PEP.
The purchase of the products is always made on request. We manufacture all products, so manufacturing times can be added. That is why the final price of the purchase, as the final price of the shipping costs will be confirmed in an email sent afterwards.
The form of payment will be made once the email is received, so at all times you can cancel the order informing us of the process.
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