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161,16 € (195,00 € TAX Inc.)
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At BIG SIGNAL we present the latest generation in design and development of cubical quad antennas for the 432 MHz / 70 cm band.

Why choose a UHF cubical quad antenna over a traditional Yagi?

· 70 centimeter full wavelength antenna, achieving maximum performance and efficiency.
· More gain in less boom length than a Yagi of the same size.
· Very low noise. Being a closed antenna will allow you to reduce QRN and urban noise, improving the quality of reception of very weak signals in the band.
· Less influence to cross polarization than a Yagi. This translates into less QSB, fading or signal loss when receiving signals in different polarization, ideal for communications via SAT or EME.
· Very high selectivity. Excellent suppression of side and rear lobes, further reducing unwanted noise in reject directions.
· Quick and easy installation, pre-assembled elements, assembly without tools.

The best UHF directional antenna option on urban environments, in times where noise in cities is increasingly high, a quad antenna is the definitive solution for DX practice with the maximum guaranteed performance.

BIG SIGNAL - The ultimate performance in V-UHF 


· Band: 432 MHz. 
· Active elements: 12 (Wide space). 
· Gain: 15,13 dBi. (Free space).
· F/B: 24,02 dB.
· SWR: 1,1:1 ~ 1,5:1.
· Impedance: 50 Ohm.
· Power rating: 5.000 W. PEP
· Boom length: 1,2 m. / 3,937 ft.
· Turning radius: 1,07 m. / 3,51 ft.
· Total height: 17 cm. / 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. 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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6 element 432 MHz (12,6 dBi - 22,97 dB F/B)
120,00 €

· Availability: STOCK
· Estimated delivery time: Immediate

Prices 21 % less for customers outside of EU (World Wide Shipping)


2 element 432 MHz (8,00 dBi - 10,01 dB F/B)
65,00 €

· Availability: OK
· Estimated delivery time: 2-3 weeks.

Prices 21 % less for customers outside of EU (World Wide Shipping)