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BIG SIGNAL 12BS-2
The largest model in the 2-meter lineup: maximum directivity, high gain, and clean reception
This BIG SIGNAL 12-element Cubical Quad for 144 MHz is the largest directional model in our 2-meter lineup. It has been developed for operators looking to take their VHF station performance to the next level by combining high gain, outstanding directivity, and an excellent signal-to-noise ratio.
Its architecture, based on 12 full-wave loop elements, is especially suited for communications where every decibel counts: terrestrial DX, SSB, FT8, contesting, satellites, EME, and weak-signal operation.
Within the BIG SIGNAL 144 MHz lineup, this model is designed for stations that prioritize maximum directional performance and want to make the most of every signal reaching the antenna, concentrating transmitted and received energy exactly where it matters.
Band: VHF / 144 MHz / 2 m
Type: directional Cubical Quad antenna
Elements: 12 full-wave loops
Position in the Lineup: largest 144 MHz model
Key Features: high gain, outstanding directivity, and excellent signal-to-noise ratio
Construction: lightweight and rugged for outdoor installation
Recommended Use: DX / weak-signal / SSB / FT8 / contesting / satellites / EME
Type: directional Cubical Quad antenna
Elements: 12 full-wave loops
Position in the Lineup: largest 144 MHz model
Key Features: high gain, outstanding directivity, and excellent signal-to-noise ratio
Construction: lightweight and rugged for outdoor installation
Recommended Use: DX / weak-signal / SSB / FT8 / contesting / satellites / EME
Why Choose the BIG SIGNAL 12-Element Cubical Quad?
• 12 elements to take 2-meter performance to the next level
This is the largest model in the BIG SIGNAL 144 MHz lineup, developed for stations where gain, directivity, and weak-signal capability are top priorities.
This is the largest model in the BIG SIGNAL 144 MHz lineup, developed for stations where gain, directivity, and weak-signal capability are top priorities.
• Full-wave loop elements
One of its main differences compared with a conventional Yagi is the use of closed full-wave loop elements. This architecture makes it possible to develop a highly efficient antenna specifically optimized for the 2-meter band.
One of its main differences compared with a conventional Yagi is the use of closed full-wave loop elements. This architecture makes it possible to develop a highly efficient antenna specifically optimized for the 2-meter band.
• High gain with an excellent gain-to-boom-length ratio
The 12-element configuration is engineered to deliver high directional performance, taking advantage of the Cubical Quad geometry to achieve an excellent balance between physical dimensions and overall performance.
The 12-element configuration is engineered to deliver high directional performance, taking advantage of the Cubical Quad geometry to achieve an excellent balance between physical dimensions and overall performance.
• Clean reception for weak-signal operation
The closed-loop geometry of the elements can provide an excellent signal-to-noise ratio in the presence of certain types of electrical interference. On VHF, where signals are often close to the noise floor, being able to pull out a weak signal more clearly can make a significant difference.
The closed-loop geometry of the elements can provide an excellent signal-to-noise ratio in the presence of certain types of electrical interference. On VHF, where signals are often close to the noise floor, being able to pull out a weak signal more clearly can make a significant difference.
• High directivity and excellent off-axis rejection
Its directional radiation pattern concentrates transmitted and received energy toward the desired direction, while lateral and rear rejection help reduce unwanted signals and interference arriving from other directions. This is especially valuable for contesting, DX, and weak-signal operation.
Its directional radiation pattern concentrates transmitted and received energy toward the desired direction, while lateral and rear rejection help reduce unwanted signals and interference arriving from other directions. This is especially valuable for contesting, DX, and weak-signal operation.
• Designed for situations where every dB counts
With 12 elements, this model is specifically aimed at operators looking to extract maximum performance from their 144 MHz station, both on transmit and receive.
With 12 elements, this model is specifically aimed at operators looking to extract maximum performance from their 144 MHz station, both on transmit and receive.
• Favorable performance with polarization variations
The geometry of a Cubical Quad can provide favorable performance when received signals experience certain polarization variations, contributing to more stable reception under changing propagation conditions.
The geometry of a Cubical Quad can provide favorable performance when received signals experience certain polarization variations, contributing to more stable reception under changing propagation conditions.
• Especially well suited for DX, satellites, and EME
The combination of gain, directivity, and signal-to-noise performance makes the 12-element model particularly attractive for terrestrial DX, SSB, FT8, contesting, satellite communications, and advanced weak-signal applications such as EME (Earth-Moon-Earth).
The combination of gain, directivity, and signal-to-noise performance makes the 12-element model particularly attractive for terrestrial DX, SSB, FT8, contesting, satellite communications, and advanced weak-signal applications such as EME (Earth-Moon-Earth).
The Flagship Model in the BIG SIGNAL 144 MHz Lineup
With its 12 full-wave elements, this model sits at the top of our 2-meter Cubical Quad lineup. It is intended for stations where gain, directivity, and weak-signal reception capability take priority over a smaller antenna footprint.
It is particularly well suited for experienced operators looking for a dedicated 144 MHz directional antenna for exploring propagation openings, contesting, long-distance contacts, or communications where every fraction of a signal can make the difference.
Engineered for Easy Installation and Operation
• Lightweight and rugged construction
The combination of materials selected for outdoor use provides a strong, durable structure without unnecessary weight, an especially important consideration for a 12-element directional VHF antenna.
The combination of materials selected for outdoor use provides a strong, durable structure without unnecessary weight, an especially important consideration for a 12-element directional VHF antenna.
• Simplified assembly
Preassembled elements and the BIG SIGNAL mounting system are designed to simplify the installation of an antenna of this size, reducing the time required to get it ready for operation.
Preassembled elements and the BIG SIGNAL mounting system are designed to simplify the installation of an antenna of this size, reducing the time required to get it ready for operation.
12 Elements. Maximum Directivity. Engineered to Hear and Reach Farther.
The BIG SIGNAL 12-element 144 MHz model represents the flagship of our 2-meter Cubical Quad lineup: an antenna engineered to combine gain, directivity, and weak-signal reception for stations where maximum performance is the priority.
Technical Specifications
Band: 144 MHz
Elements: 12 (long-spacing configuration)
Gain: 15.1 dBi (free space)
F/B Ratio: 23.44 dB
-3 dB Beamwidth: 30°
SWR: 1.1:1 ~ 1.5:1
Impedance: 50 Ohms
Maximum Power: 5,000 W PEP
Boom Length: 7.14 m / 23.43 ft
Turning Radius: 3.567 m / 11.70 ft
Overall Height: 0.73 m / 2.40 ft
Weight: 7 kg / 15.43 lb
Wind Survival: > 200 km/h / 124 mph
Wind Load: 0.443 m² | 347.9 N | @ 120 km/h / 74.6 mph
Elements: 12 (long-spacing configuration)
Gain: 15.1 dBi (free space)
F/B Ratio: 23.44 dB
-3 dB Beamwidth: 30°
SWR: 1.1:1 ~ 1.5:1
Impedance: 50 Ohms
Maximum Power: 5,000 W PEP
Boom Length: 7.14 m / 23.43 ft
Turning Radius: 3.567 m / 11.70 ft
Overall Height: 0.73 m / 2.40 ft
Weight: 7 kg / 15.43 lb
Wind Survival: > 200 km/h / 124 mph
Wind Load: 0.443 m² | 347.9 N | @ 120 km/h / 74.6 mph
12 Elements and 15.1 dBi for Serious 144 MHz Performance
Its long-spacing configuration, combined with 15.1 dBi of gain, a 23.44 dB front-to-back ratio, and a 30° beamwidth at -3 dB, is engineered for stations requiring high directivity and outstanding performance for long-distance and weak-signal communications.
Construction
• Boom-to-Mast Plate: 200 x 100 x 8 mm.
• Boom: 35 x 2 mm square profile.
• Hardware and Fasteners: W4 stainless steel.
• Fiberglass System: 8 x 4 mm reinforced fiberglass tubing with UV-protective coating.
• Wire: BIG SIGNAL Wire, special copper wire with a polyethylene (PE) jacket for excellent weather protection and high mechanical strength.
• Design and Optimization: EA1DDO Máximo.
• Feed System: direct-feed connection plate for 50-ohm coaxial cable.
• Boom: 35 x 2 mm square profile.
• Hardware and Fasteners: W4 stainless steel.
• Fiberglass System: 8 x 4 mm reinforced fiberglass tubing with UV-protective coating.
• Wire: BIG SIGNAL Wire, special copper wire with a polyethylene (PE) jacket for excellent weather protection and high mechanical strength.
• Design and Optimization: EA1DDO Máximo.
• Feed System: direct-feed connection plate for 50-ohm coaxial cable.
Built for High-Performance Installations
• Heavy-Duty 35 x 2 mm Boom
The main structure uses a square boom engineered for an antenna measuring 7.14 meters / 23.43 feet in length, while keeping the total weight to just 7 kg / 15.43 lb.
The main structure uses a square boom engineered for an antenna measuring 7.14 meters / 23.43 feet in length, while keeping the total weight to just 7 kg / 15.43 lb.
• Reinforced Fiberglass with UV Protection
The elements use 8 x 4 mm reinforced fiberglass tubing, selected to combine electrical insulation, mechanical strength, and long-term durability in outdoor installations.
The elements use 8 x 4 mm reinforced fiberglass tubing, selected to combine electrical insulation, mechanical strength, and long-term durability in outdoor installations.
• W4 Stainless-Steel Hardware
The metal components are designed to withstand prolonged exposure to outdoor conditions while helping minimize maintenance requirements.
The metal components are designed to withstand prolonged exposure to outdoor conditions while helping minimize maintenance requirements.
• BIG SIGNAL Wire
Special copper wire protected by a polyethylene (PE) jacket, selected for its mechanical strength, weather resistance, and long-term outdoor durability.
Special copper wire protected by a polyethylene (PE) jacket, selected for its mechanical strength, weather resistance, and long-term outdoor durability.
Engineered to Take 2-Meter Performance Farther.
BIG SIGNAL 12BS-2 – the largest model in our 144 MHz Cubical Quad lineup, combining 12 full-wave elements, 15.1 dBi of gain, and a 30° beamwidth in a rugged structure engineered for serious high-performance VHF stations.
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