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BIG SIGNAL 4BS-2
Compact 4-Element Directional Cubical Quad for 144 MHz
The BIG SIGNAL 4BS-2 is a 4-element directional Cubical Quad developed for operators looking for high performance on 144 MHz without installing an oversized antenna system.
Its architecture uses full-wave closed-loop elements to combine gain, directivity, and a favorable signal-to-noise ratio in a compact structure, making it especially well suited for terrestrial DX, SSB, digital modes, and weak-signal operation on 2 meters.
Band: 144 MHz / 2-Meter Band
Type: Directional monoband Cubical Quad
Elements: 4 full-wave elements
Design: Compact and directional
Applications: DX / Weak-Signal / SSB / Digital Modes
Assembly: Preassembled elements
Type: Directional monoband Cubical Quad
Elements: 4 full-wave elements
Design: Compact and directional
Applications: DX / Weak-Signal / SSB / Digital Modes
Assembly: Preassembled elements
Why Choose the BIG SIGNAL 4BS-2?
• 4 Full-Wave Loop Elements
The 4BS-2 uses full-wave closed-loop elements, one of the defining characteristics of Cubical Quad design and a key part of its electrical behavior on the 2-meter band.
The 4BS-2 uses full-wave closed-loop elements, one of the defining characteristics of Cubical Quad design and a key part of its electrical behavior on the 2-meter band.
• High Performance in a Compact Format
Its four-element configuration provides an attractive balance of gain, directivity, and overall size, especially for installations where available space or turning radius is an important consideration.
Its four-element configuration provides an attractive balance of gain, directivity, and overall size, especially for installations where available space or turning radius is an important consideration.
• Excellent Signal-to-Noise Ratio
The closed-loop geometry can provide cleaner reception in the presence of certain types of electrical noise, helping improve weak-signal copy in demanding RF environments.
The closed-loop geometry can provide cleaner reception in the presence of certain types of electrical noise, helping improve weak-signal copy in demanding RF environments.
• Directivity and Rejection of Unwanted Signals
Its directional pattern concentrates transmit and receive energy toward the desired direction, while front-to-back rejection and reduced unwanted lobes help separate signals arriving from other directions.
Its directional pattern concentrates transmit and receive energy toward the desired direction, while front-to-back rejection and reduced unwanted lobes help separate signals arriving from other directions.
• Favorable Behavior with Polarization Changes
Cubical Quad geometry can reduce the impact of certain changes in received-signal polarization, contributing to more stable reception and reduced fading under some conditions.
Cubical Quad geometry can reduce the impact of certain changes in received-signal polarization, contributing to more stable reception and reduced fading under some conditions.
• Quick and Simple Assembly
Its preassembled elements simplify installation, reducing setup time and avoiding unnecessarily complex adjustments.
Its preassembled elements simplify installation, reducing setup time and avoiding unnecessarily complex adjustments.
144 MHz Performance Without a Large Antenna Structure
The 4BS-2 is designed for operators ready to move beyond an omnidirectional antenna or basic directional system and step up to greater gain and improved rejection, while maintaining practical dimensions for a home-station installation.
• 4 full-wave elements.
• Compact design for 144 MHz.
• Excellent balance of gain and overall dimensions.
• Excellent signal-to-noise ratio.
• High directivity and selectivity.
• Especially well suited for DX and weak-signal operation.
• Compact design for 144 MHz.
• Excellent balance of gain and overall dimensions.
• Excellent signal-to-noise ratio.
• High directivity and selectivity.
• Especially well suited for DX and weak-signal operation.
Four Elements. High Performance. Compact Dimensions.
BIG SIGNAL 4BS-2 – a directional Cubical Quad designed to deliver gain, selectivity, and weak-signal performance on 144 MHz without requiring an oversized antenna system.
Technical Specifications
Band: 144 MHz / 2-Meter Band
Elements: 4
Gain: 10.50 dBi (Free Space)
F/B Ratio: 23.66 dB
3 dB Beamwidth: 56°
SWR: 1.1:1 – 1.5:1
Impedance: 50 Ω
Maximum Power: 5,000 W PEP
Boom Length: 1.10 m / 3.61 ft
Turning Radius: 0.65 m / 2.13 ft
Total Height: 0.55 m / 1.80 ft
Weight: 1.3 kg / 2.87 lb
Wind Survival: > 200 km/h / 124 mph
Wind Load: 0.092 m² / 0.99 ft² | 71.82 N / 16.15 lbf | @ 120 km/h / 74.6 mph
Elements: 4
Gain: 10.50 dBi (Free Space)
F/B Ratio: 23.66 dB
3 dB Beamwidth: 56°
SWR: 1.1:1 – 1.5:1
Impedance: 50 Ω
Maximum Power: 5,000 W PEP
Boom Length: 1.10 m / 3.61 ft
Turning Radius: 0.65 m / 2.13 ft
Total Height: 0.55 m / 1.80 ft
Weight: 1.3 kg / 2.87 lb
Wind Survival: > 200 km/h / 124 mph
Wind Load: 0.092 m² / 0.99 ft² | 71.82 N / 16.15 lbf | @ 120 km/h / 74.6 mph
Construction & Materials
• Boom
Square 25 × 2 mm / 0.98 × 0.08 in tubing, designed to provide a compact, rigid, and lightweight structure.
Square 25 × 2 mm / 0.98 × 0.08 in tubing, designed to provide a compact, rigid, and lightweight structure.
• Hardware
Made from W4-grade stainless steel, providing excellent corrosion resistance and long-term durability in outdoor installations.
Made from W4-grade stainless steel, providing excellent corrosion resistance and long-term durability in outdoor installations.
• Fiberglass System
8 × 4 mm / 0.31 × 0.16 in reinforced fiberglass tubing with a UV-protective coating to increase durability against prolonged sun exposure and outdoor weather conditions.
8 × 4 mm / 0.31 × 0.16 in reinforced fiberglass tubing with a UV-protective coating to increase durability against prolonged sun exposure and outdoor weather conditions.
• BIG SIGNAL Wire
Special copper wire with a polyethylene (PE) jacket, designed to provide excellent weather protection and high mechanical durability for long-term outdoor installations.
Special copper wire with a polyethylene (PE) jacket, designed to provide excellent weather protection and high mechanical durability for long-term outdoor installations.
• RF Feed
Connection via direct terminals for 50 Ω coaxial cable.
Connection via direct terminals for 50 Ω coaxial cable.
Reviews
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La compré para, inicialmente, participar en el Nacional V-UHF de este año en la modalidad de seis horas (podéis ver una foto de mi antena montada en portable en la web de participantes URE ). Es, sencillamente, IMPRESIONANTE. Desde la cumbre de Gran Canaria, he trabajado la península (algo en su interior y sobre todo, el sur) con tan sólo 30 watios. Cabo Verde y, por supuesto, casi todas las islas Canarias (las que no he trabajado es por no haber operadores en ese momento). Ligera, robusta... MUY Robusta y bien acabada. Resonante en UHF (aunque no debiera ser efectiva, he trabajado otras islas Canarias en esa banda con ella)... no quiero imaginar como será la resonante. La recomiendo TOTALMENTE, sobre todo porque, para que os hagáis una idea, trabajar Málaga en VHF y SSB desde la Playa de Pozo Izquierdo (en la misma orilla, algo complicado en esta frecuencia), ya os podéis hacer una idea. Personalmente, solo salgo en portable pero, si el día de mañana montarse algo en casa, como mínimo, sería esta antena pero posiblemente me fuese a lo más grande que tienen. Si esta es un cañón, las otras son misiles.