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· Estimated delivery time: STOCK - Inmediate shipping

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198,35 € (240,00 € TAX Inc.)
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BIG SIGNAL is proud to present the latest generation of cubical antennas for the 432 MHz / 70 cm band. Our BIG SIGNAL 12BS-70 antenna, with its 12 long-spaced elements, stands as one of our best-selling models, renowned for its outstanding performance within a compact boom.

Why should you choose a cubical UHF antenna over a traditional Yagi?

· Full-wavelength antenna on 70 centimeters, achieving maximum performance and efficiency.
· Higher gain in a shorter boom length compared to a Yagi of similar size.
· Extremely low noise. Being a closed antenna, it allows you to reduce QRN and urban noise, improving the reception quality of very weak signals in the band.
· Less sensitivity to polarization cross-over than a Yagi. This translates to less QSB, fading, or signal loss when receiving signals with different polarizations, making it ideal for satellite or moonbounce communications.
· High selectivity. Excellent suppression of side and rear lobes, further reducing unwanted noise in the rejection directions.
· Easy and quick installation with pre-assembled elements and tool-free assembly.

In urban environments where noise levels are on the rise, a cubical antenna is the ultimate solution to achieve maximum performance in DX practice.

BIG SIGNAL: Where V-UHF performance reaches its peak.


· Band: 430 ~ 440 MHz. 
· Active elements: 12 (wide space). 
· Gain: 15,13 dBi. (free space).
· F/B: 24,02 dB.
· Beamwidth 3 dB: 32º
· SWR: 1,1:1 ~ 1,5:1.
· Impedance: 50 Ohm.
· Power rating: 5.000 W. PEP
· Boom length: 2,04 m. / 3,937 ft.
· Turning radius: 1,07 m. / 3,51 ft.
· Total height: 0,17 m. / 0,557 ft.
· Weight: 1,8 Kg / 3,968 lb
· Wind survival: > 200 Km/h. / 125 mph.
· Wind load: 0,054 m2 | 42,70 N | @120 km/h.

Construction details:

· Fastening to mast: Clamp up to 50 mm.
· Boom size: Square aluminum of 20 x 2 mm / 9,84 in.
· Hardware: Stainless Steel, W4 grade.
· Spreaders Arms: 8 x 4 mm reinforced fiberglass tube with UV protection layer.
· Cable: BIG SIGNAL - Wire. Special copper cable with polyethylene (PE) sheath for excellent weather protection and mechanical resistance.
· Feeding: N type connector.


  1. Richard (4Z1JJ)20 Ene, 2024 - 11:30

    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.

  2. Joan (EA6TC) (EA6TC)09 Jun, 2023 - 17:28

    Tengo esta antena, para satelites especialmente, y la verdad va de fabula, tiene muy buena oreja.. Excelente!!

  3. Marco (IW2GSC)24 Feb, 2023 - 20:03

    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

  4. Eric (EA3BQ)09 Mar, 2021 - 09:43

    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.

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