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BIG SIGNAL 12BS-70
12-Element Cubical Quad for High-Performance 432 MHz / 70 cm Operation
The BIG SIGNAL 12BS-70 is a 12-element long-spacing directional Cubical Quad developed for operators looking for high gain, strong directivity, and an excellent signal-to-noise ratio on the 432 MHz band.
Its architecture based on full-wave closed-loop elements delivers outstanding performance in a surprisingly compact package, making it an excellent choice for terrestrial DX, SSB, digital modes, satellite communications, and weak-signal operation.
Band: 432 MHz / 70 cm
Type: Directional monoband Cubical Quad
Elements: 12 full-wave elements
Configuration: Long spacing
Applications: DX / SSB / digital modes / satellites / weak signals
Design: High gain and directivity with a compact boom
Type: Directional monoband Cubical Quad
Elements: 12 full-wave elements
Configuration: Long spacing
Applications: DX / SSB / digital modes / satellites / weak signals
Design: High gain and directivity with a compact boom
Why Choose the BIG SIGNAL 12BS-70?
• 12 Full-Wave Elements
The Cubical Quad geometry uses full-wave closed-loop elements, designed to provide high electrical efficiency and make excellent use of every element in the array.
The Cubical Quad geometry uses full-wave closed-loop elements, designed to provide high electrical efficiency and make excellent use of every element in the array.
• High Gain from a Compact Boom
Its 12-element long-spacing configuration provides strong directional performance while maintaining remarkably compact dimensions for an antenna in this class.
Its 12-element long-spacing configuration provides strong directional performance while maintaining remarkably compact dimensions for an antenna in this class.
• Excellent Signal-to-Noise Ratio
The closed-loop elements characteristic of a Cubical Quad can provide cleaner reception in the presence of certain types of electrical noise, an especially valuable advantage when working signals near the reception threshold.
The closed-loop elements characteristic of a Cubical Quad can provide cleaner reception in the presence of certain types of electrical noise, an especially valuable advantage when working signals near the reception threshold.
• Directivity for Weak-Signal Operation
Its directional pattern concentrates transmitted and received energy toward the desired direction, helping to reduce signals and interference arriving from other directions.
Its directional pattern concentrates transmitted and received energy toward the desired direction, helping to reduce signals and interference arriving from other directions.
• Ideal for Terrestrial DX and Satellite Communications
Its combination of gain, directivity, and compact dimensions makes it an especially attractive choice for SSB, digital modes, UHF DX, satellite communications, and weak-signal stations.
Its combination of gain, directivity, and compact dimensions makes it an especially attractive choice for SSB, digital modes, UHF DX, satellite communications, and weak-signal stations.
• Excellent Size-to-Performance Ratio
Its element geometry makes it possible to achieve high performance without requiring an excessively large structure, simplifying installation on towers and rotator systems.
Its element geometry makes it possible to achieve high performance without requiring an excessively large structure, simplifying installation on towers and rotator systems.
• Quick and Easy Assembly
The elements are supplied preassembled to reduce assembly time and simplify installation without complex mechanical adjustments.
The elements are supplied preassembled to reduce assembly time and simplify installation without complex mechanical adjustments.
A Different Alternative to the Traditional Yagi
The BIG SIGNAL 12BS-70 uses a different architecture from a conventional Yagi. Its full-wave closed-loop elements combine gain, directivity, and an excellent signal-to-noise ratio in a compact structure specifically designed for the 70 cm band.
• 12 full-wave elements.
• High gain and directivity.
• Excellent size-to-performance ratio.
• Especially suitable for weak-signal operation.
• Designed for terrestrial DX and satellite communications.
• Compact construction for high-performance installations.
• High gain and directivity.
• Excellent size-to-performance ratio.
• Especially suitable for weak-signal operation.
• Designed for terrestrial DX and satellite communications.
• Compact construction for high-performance installations.
When Signals Are Weak, Every Decibel Counts.
The BIG SIGNAL 12BS-70 was developed for operators who want to take their 432 MHz station to the next level: high gain, strong directivity, and outstanding performance in a compact package.
Technical Specifications
Band: 430–440 MHz
Elements: 12 (long-spacing configuration)
Gain: 15.13 dBi (free space)
F/B Ratio: 24.02 dB
SWR: 1.1:1–1.5:1
Impedance: 50 Ohms
Maximum Power: 2,000 W PEP
Boom Length: 2.04 m
Turning Radius: 1.079 m
Overall Height: 0.175 m
Weight: 1.8 kg
Wind Survival: > 200 km/h
Wind Load: 0.054 m² | 42.70 N | @ 120 km/h
Elements: 12 (long-spacing configuration)
Gain: 15.13 dBi (free space)
F/B Ratio: 24.02 dB
SWR: 1.1:1–1.5:1
Impedance: 50 Ohms
Maximum Power: 2,000 W PEP
Boom Length: 2.04 m
Turning Radius: 1.079 m
Overall Height: 0.175 m
Weight: 1.8 kg
Wind Survival: > 200 km/h
Wind Load: 0.054 m² | 42.70 N | @ 120 km/h
Construction
• Mast Mounting: clamp for masts up to 50 mm.
• Boom: 20 x 2 mm square profile.
• Elements: 8 x 4 mm reinforced fiberglass tubing with UV-protective coating.
• Hardware and Fasteners: W4 stainless steel.
• 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 Connection: N-type connector.
• Boom: 20 x 2 mm square profile.
• Elements: 8 x 4 mm reinforced fiberglass tubing with UV-protective coating.
• Hardware and Fasteners: W4 stainless steel.
• 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 Connection: N-type connector.
Performance at a Glance
• 15.13 dBi free-space gain.
• 24.02 dB front-to-back ratio.
• 12 elements in a long-spacing configuration.
• Only 2.04 m boom length.
• SWR from 1.1:1 to 1.5:1.
• Handles up to 2,000 W PEP.
• Weighs only 1.8 kg.
• 24.02 dB front-to-back ratio.
• 12 elements in a long-spacing configuration.
• Only 2.04 m boom length.
• SWR from 1.1:1 to 1.5:1.
• Handles up to 2,000 W PEP.
• Weighs only 1.8 kg.
15.13 dBi of Gain from Just 2.04 Meters of Boom.
The BIG SIGNAL 12BS-70 packs 12 long-spaced elements into a lightweight, compact structure engineered to deliver high directional performance across the 430–440 MHz band.
Reviews
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Mi idea era poner una antena para VHF y UHF para iniciarme un poco en estas bandas, no queria unas antenas muy grandes y aparatosas, pero si queria que tuviesen un gran rendimiento, por lo menos el mejor posible, en un tamaño comedido. Despues de dar muchas vueltas, buscar información y comentarios, me he decidido por una 8BS-2 y 12BS-70.
Las antenas estan mecanicamente perfectas, muy sencillas de montar y seguro que daran buenos dias de entretenimiento y DXs.
Nos escuchamos desde IN73DL.
When IO-117 covers the United States, I usually can't hear it until it's at least 10 degrees elevation. And I usually can't hit the satellite on transmit until it's nearly 20 degrees. With the new antenna, I heard and hit the satellite at about 3 degrees elevation.
Tengo esta antena, para satelites especialmente, y la verdad va de fabula, tiene muy buena oreja.. Excelente!!
Hi my name is Marco. I bought this model for curiosity quad antenna Compared yaghi 16 elements boom 3 meters. In most cases the received signal is the same. in my opinion, the positive sides are: low noise, less boom lenght , better f/b and back then yagi good construction. The attention of the manufacturer in providing work gloves was greatly appreciated
Muy contento con la 12bs70, muy sencilla de montar, materiales de excelente calidad y una atencion al cliente de 10 por parte de Big Signal.
Al igual que su hermana de 2m es una antena con un montaje muy sencillo, en apenas 10 minutos la puedes tener operativa, con materiales de muy buena calidad y un manual de instrucciones muy detallado.
Al principio te sorprende el bajo ruido, parece que no tengas antena instalada, tiendes a subir el volumen de tu emisora y cuando de golpe te llama alguien y te entra con un s9 te pegas un susto que te caes de la silla jajaja.
Antena con un patron de radiacion muy directivo, cuando la enfocas hacia tu corresponsal es una delicia tanto emitir como recibir, la uso tanto en ssb terrestre como en sat (polarizacion horizontal) con resultados muy satisfactorios con contactos en fonia ssb a unos 300km sin ninguna dificultad (a la espera de probarla con un previo de rx para sats).
Al igual que su version de 2m roe totalmente plana en toda la banda.