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BIG SIGNAL 4BS-11
4-Element Quad for Serious DX Performance on 27 MHz
The BIG SIGNAL 4BS-11 is a directional 4-element full-wave Quad antenna, developed for operators looking for a higher level of gain, directivity, and signal control on the 27 MHz / 11-meter band.
With a reflector, driven element, and two directors, the BIG SIGNAL 4BS-11 takes the Quad concept to a configuration clearly focused on long-distance DX and weak-signal reception, while maintaining an excellent balance between performance and overall size.
Band: 27 MHz / 11-Meter Band
Configuration: 4-element Quad
Elements: Full-wave closed loops
Element Layout: Reflector + Driven Element + 2 Directors
Type: Directional monoband antenna
Polarization: Horizontal
Designed For: High-performance DX
Configuration: 4-element Quad
Elements: Full-wave closed loops
Element Layout: Reflector + Driven Element + 2 Directors
Type: Directional monoband antenna
Polarization: Horizontal
Designed For: High-performance DX
When Every dB Counts
• Four Full-Wave Quad Elements
The 4BS-11 uses four closed-loop elements specifically optimized for 27 MHz. This configuration was developed to extract high performance from the Quad geometry.
The 4BS-11 uses four closed-loop elements specifically optimized for 27 MHz. This configuration was developed to extract high performance from the Quad geometry.
• More Gain and Greater Directivity
The addition of two directors further concentrates RF energy toward the desired direction, providing excellent performance for long-distance DX.
The addition of two directors further concentrates RF energy toward the desired direction, providing excellent performance for long-distance DX.
• Excellent Signal-to-Noise Ratio
High directivity and strong rejection outside the main lobe help reduce signals and interference arriving from unwanted directions, making it easier to copy DX stations close to the noise floor.
High directivity and strong rejection outside the main lobe help reduce signals and interference arriving from unwanted directions, making it easier to copy DX stations close to the noise floor.
• Excellent Front-to-Back Rejection
The 4BS-11 is designed to do more than simply put a strong signal forward. Its directional pattern allows you to use your rotor to reduce stations and interference arriving from unwanted directions.
The 4BS-11 is designed to do more than simply put a strong signal forward. Its directional pattern allows you to use your rotor to reduce stations and interference arriving from unwanted directions.
• Stable DX Signal Reception
Quad geometry can provide favorable behavior under certain polarization changes encountered during propagation, helping maintain more stable signal reception under certain conditions.
Quad geometry can provide favorable behavior under certain polarization changes encountered during propagation, helping maintain more stable signal reception under certain conditions.
In DX, More Power Isn't Always the Answer
A highly directional antenna concentrates more RF energy toward the station you're working while also improving reception from that direction. When a signal is barely above the noise floor, gain, directivity, and rejection can make the difference between working the DX and missing it.
Why Choose a Quad Over a Yagi?
Yagis and Quads represent two different approaches to directional antenna design. While a conventional Yagi typically uses open elements, the 4BS-11 uses four full-wave closed-loop elements.
This configuration provides an excellent combination of gain, directivity, and signal-to-noise performance, while maintaining competitive dimensions for the level of performance achieved.
The Next Level in the 11-Meter Lineup
• 2BS-11 → Compact and efficient for getting started with directional DX.
• 3BS-11 → More gain, selectivity, and rejection for the advanced DX operator.
• 4BS-11 → The model for operators who demand maximum performance from the BIG SIGNAL 11-meter directional lineup.
• 3BS-11 → More gain, selectivity, and rejection for the advanced DX operator.
• 4BS-11 → The model for operators who demand maximum performance from the BIG SIGNAL 11-meter directional lineup.
Built to Stay on the Tower
• Rugged Construction
Designed for permanent installations and manufactured from carefully selected materials to provide mechanical strength and long-term durability.
Designed for permanent installations and manufactured from carefully selected materials to provide mechanical strength and long-term durability.
• Optimized Monoband Design
No multiband compromises. The entire antenna geometry has been developed around one goal: maximum possible performance on 27 MHz.
No multiband compromises. The entire antenna geometry has been developed around one goal: maximum possible performance on 27 MHz.
Sometimes, Hearing Just a Little More Changes Everything.
When propagation opens up, many antennas can make DX contacts. The difference becomes clear when conditions are less than perfect, the band gets crowded, and the station you're looking for is barely above the noise. The BIG SIGNAL 4BS-11 was designed precisely for those moments: more gain, greater directivity, and more ability to isolate the signal you actually want to hear.
BIG SIGNAL 4BS-11 – When DX Gets Tough, That's When It Gets Interesting.
Technical Specifications
Band: 27 MHz / 11-Meter Band
Elements: 4 full-wave Quad elements
Gain: 10.40 dBi (Free Space)
F/B Ratio: 22.40 dB
Polarization: Horizontal
SWR: 1.1:1 – 1.5:1
Impedance: 50 Ω
Maximum Power: 5,000 W PEP
Boom Length: 5.70 m / 18.70 ft
Turning Radius: 3.363 m / 11.03 ft
Total Height: 2.75 m / 9.02 ft
Weight: 12 kg / 26.46 lb
Wind Survival: > 150 km/h / 93 mph
Wind Load: 0.702 m² / 7.56 ft² | 550.91 N / 123.85 lbf | @ 120 km/h / 74.6 mph
Elements: 4 full-wave Quad elements
Gain: 10.40 dBi (Free Space)
F/B Ratio: 22.40 dB
Polarization: Horizontal
SWR: 1.1:1 – 1.5:1
Impedance: 50 Ω
Maximum Power: 5,000 W PEP
Boom Length: 5.70 m / 18.70 ft
Turning Radius: 3.363 m / 11.03 ft
Total Height: 2.75 m / 9.02 ft
Weight: 12 kg / 26.46 lb
Wind Survival: > 150 km/h / 93 mph
Wind Load: 0.702 m² / 7.56 ft² | 550.91 N / 123.85 lbf | @ 120 km/h / 74.6 mph
Construction & Materials
The days of fragile Quad antennas are over.
The perception of the Quad as a mechanically delicate antenna belongs to another era. At BIG SIGNAL, we combine CNC machinery, in-house manufacturing capabilities, and materials specifically selected for each structural function, allowing us to design and manufacture purpose-built components rather than adapt generic solutions. The result is a modern, precise, and robust Quad, engineered for permanent outdoor installation.
• Boom-to-Mast Plate
Heavy-duty 150 × 150 × 8 mm / 5.91 × 5.91 × 0.31 in mounting plate, designed to provide a strong and secure connection between the boom and mast.
Heavy-duty 150 × 150 × 8 mm / 5.91 × 5.91 × 0.31 in mounting plate, designed to provide a strong and secure connection between the boom and mast.
• Boom
Square 50 × 2 mm / 1.97 × 0.08 in tubing, selected to provide high structural rigidity while keeping overall weight under control.
Square 50 × 2 mm / 1.97 × 0.08 in tubing, selected to provide high structural rigidity while keeping overall weight under control.
• Spider System
Constructed from 25 × 3 mm / 0.98 × 0.12 in angle sections.
Constructed from 25 × 3 mm / 0.98 × 0.12 in angle sections.
• Hardware
Made from W4-grade stainless steel for excellent mechanical strength, corrosion resistance, and long-term durability in outdoor installations.
Made from W4-grade stainless steel for excellent mechanical strength, corrosion resistance, and long-term durability in outdoor installations.
• Fiberglass Spreader System
14 × 7 mm / 0.55 × 0.28 in reinforced fiberglass tubing with a UV-protective coating, designed for long-term permanent outdoor installations.
14 × 7 mm / 0.55 × 0.28 in reinforced fiberglass tubing with a UV-protective coating, designed for long-term permanent outdoor installations.
• BIG SIGNAL Wire by Messi & Palioni
Special copper wire with a polyethylene (PE) jacket, developed to provide excellent weather protection and high mechanical durability for long-term outdoor use.
Special copper wire with a polyethylene (PE) jacket, developed to provide excellent weather protection and high mechanical durability for long-term outdoor use.
• RF Feed
Direct connection to 50 Ω coaxial cable terminals.
Direct connection to 50 Ω coaxial cable terminals.
Construction
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Reviews
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The purchase of the products is always made on request. We manufacture all products, so manufacturing times can be added. That is why the final price of the purchase, as the final price of the shipping costs will be confirmed in an email sent afterwards.
The form of payment will be made once the email is received, so at all times you can cancel the order informing us of the process.
A very serious company with high-quality equipment and impeccable commercial and technical support. Nowadays, it's rare to find such competent professionals, but here, you can trust them with your eyes closed! A big thank you for the valuable help in setting up my installation. I won?t hesitate to return to BIG SIGNAL for future antenna purchases. If you're looking for quality, efficiency, and reliability, there's only one place: BIG SIGNAL!
I've had that 4BS-11 for over a year now, and it never ceases to amaze me ? it's like a missile of an antenna.
Ya tengo la antena instalada y a pleno funcionamiento. Ha sido una instalación compleja, mastil, rotor, arriestrarla, el equipo de antenistas "Vesatel Servicios Integrales" y el operador de la Grua "Gruas Moreno", 10 puntos, sin ellos no hubiera sido posible, la antena es muy grande y su montaje es complejo.
Los resultados son ESPECTACULARES, DX con facilidad con poca propagación, cuando hago el cambio a la vertical, obtengo 4/5 puntos de diferencia de señal. Es un "Cañon", estoy feliz por la inversión , la instalación y el performance que esta demostrando la Big Signal 4DS-11. DX con dos estaciones chilenas 17 horas UCT mas de 35 minutos de QSO, con señal sostenida en las dos direcciones. Comentario final: Big Signal 4DS-11 es una antena de alto rendimiento. Gracias Big Signal por fabricar algo tan espectacular.
Hola,
Gracias pore mi comentario y un aplauso para Big Signal para su 4BG-11 hermosa antena y muy bueno funcionamiento merece bien sus 5 estrellas.
Merci pour mon commentaire et un applaudissement pour Big Signal pour sa 4BG-11 belle antenne et un tres bon fonctionnement merite bien un 5 etoiles
Thank you for my comment and an applause for Big Signal for its 4BG-11 beautiful antenna and very good operation well deserves a 5 star
I already have the antenna mounted on the tower and began to test it with almost no propagation. I have made QSO with New Caledonia, New Zealand, Australia, Thailand, Qatar, Brazil with signals from 4 to 9+ and radio 4-5 with only 50 Watts!!!
The antenna keeps all the stated promises, I keep hoping for better propagation.
Well done BIG SIGNAL!
this antenna kicks butt , i hear more low down stations than my gizmo (wast of money ) i have jumped 2 s points with this quad , Lloyed my mate said i have 2 s points over the gizmotchy at around 40ks , 20s over into OLD when not much skip . 1 down fall is the cross pieces should be welded but very sturdy LOVE IT , 43 da040 gary
After many months now of Purchasing the 4 Element Big Signal 4BS-11 Cubical Quad I have now finally managed to get the chance to install this great antenna.
At times I am the only one local in Glasgow, Scotland hearing and working stations on the 11m band. Thanks Big Signal, Gary 108AT101
Hi big signal I got the 4bs 11 up on the mast today working very well 4s points up on 2 element delta loop fantastic reports rx and tx good service and strong construction well done Jose and team at big signal 163lr101 ian
De tener una verdadera bomba para el DX que es la 2 elementos y pensar que mejor no podía ser, he pasado a alucinar pero esta vez con la 4 elementos. Nunca pensé que esto pudiera suceder. En Valencia soy el primero en escuchar la propagación . Señales de +20,+30 en toda Europa con 50W. No se que más decir, excepto que estoy contentísimo . Gracias BIG-SIGNAL .
The Quad is working amazing and sometimes i am the only one hearing stations on the band.
Hallo Big Signals,
I will give you now after near 9 month a short answer and back up about the 4 Element Cubical Quad 4BS-11. Before I changed my system I have a 4 ele Yagi special build for my opinion and dates....it works very nice....but now I must say the Quad works amazing super top.... Big difference in working wise to a yagi....and I must learn a little time to use the Quad perfect. A lot more Gain and more RX makes this antenna to a super gun.
Transmito para Europa con tan solo picos de 3 W. y pongo señales de 8 y cuando le digo a los corresponsales que estoy tan solo con 3 W. hay una exclamación ohhhh good. Al día siguiente de montar la antena trabajé la estación 271DA/0 en el Pacifico Central y mi colega que esta a 600 metros de mi casa no la escuchaba y yo la escuchaba 5/3 y eso que el tiene 11 metros de mástil y una Yagi de 4 elementos. Esta antena es una aspiradora de señales y un misil en transmisión.