ES
EN
- Description
- Specifications
- Reviews (2)
- Customers
- Videos
- How to buy?
BIG SIGNAL DeltaFlex
The ultimate companion for /Portable, SOTA, POTA, and field operations.
At BIG SIGNAL, we're always pushing the boundaries to bring you the latest in amateur radio technology. Today, we’re excited to introduce our newest innovation for portable operations: the BIG SIGNAL DeltaFlex — an antenna that redefines what it means to go portable in the world of ham radio.
More than an antenna. A true portable revolution.
The DeltaFlex isn’t just an antenna—it's a high-performance tool designed for operators who live their radio adventures outdoors. Whether you're active in SOTA, POTA, or any kind of field expedition, the DeltaFlex delivers outstanding performance, unmatched flexibility, and true portability like no other.
Why DeltaFlex stands out:
· Adaptability built in: Engineered for adventurous hams, the DeltaFlex lets you adjust its height, width, angle, and orientation, so you can adapt to any terrain or installation challenge—mountains, forests, beaches, or tight urban spots.
· Multi-band performance: Covering from 40 to 10 meters, the DeltaFlex is your all-in-one solution for portable HF ops. Switch bands on the fly without switching antennas.
· Quick, hassle-free setup: All you need is a 6–7 meter mast to have it fully deployed in minutes. No tools. No stress. You’ll be on the air before others finish unpacking.
· Lightweight but tough: Weighing just 500 grams (1.1 lbs) and rated for up to 300W, this antenna offers the perfect balance of portability and power for any rugged environment.
Why choose DeltaFlex over traditional portable antennas?
· Full-wave performance on 40 meters: While other portable options like EFHWs or dipoles rely on half-wave designs, the DeltaFlex operates at full wavelength, giving you greater efficiency and higher gain—meaning stronger QSOs, even in challenging conditions.
· Low noise reception: Its closed-loop design dramatically reduces background QRM, so you can hear even the weakest signals—ideal for noisy environments.
· DX without limits: With vertical polarization and a low radiation angle, the DeltaFlex is built for long-distance communication. Push your DX boundaries like never before.
· No tuner needed: The DeltaFlex is resonant on 40, 20, 15, and 10 meters, so you can skip the antenna tuner and go straight to operating—fast and easy.
DeltaFlex isn’t just another antenna. It’s your trusted partner in every field operation.
With its clever design, reliable performance, and true portability, it’s the perfect match for any ham who wants to operate outdoors without compromise.
Take it anywhere. Reach farther. Experience portable like never before.
Ready to elevate your portable DXing?
The BIG SIGNAL DeltaFlex is here to make it happen.
Specifications:
· Bands: 40 / 20 / 15 / 10 meters (Selectable).
· Gain: 3.2 dBi (Free space).
· Polarization: Vertical.
· SWR: 1.1:1 ~ 2.0:1
· Maximum Power: 300 W. PEP.
· Total Width: 16 ~ 18 meters / 52.49 ~ 59.06 ft.
· Minimum Required Mast Height: From 6 meters / 19.69 ft
· Weight: 500 grams. / 1.10231 lb
· Wind Resistance: > 200 km/h. / 124.27 mph
Manufacturing:
· Mounting: Consists of 2 fiberglass insulators that, when tensioned with insulating cord, shape the antenna.
· Cable: BIG SIGNAL - Wire. Special copper cable with polyethylene (PE) sheath for excellent weather protection and mechanical resistance.
· Feed: PL-UHF.
Reviews
Write your review
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.
De lo mejor que he comprado para operaciones de campo, montada en un mástil de 6 metros de altura trabajó muy bien las bandas ofrecidas.
Enrollada cabe en cualquier bolso y muy ligera .
De mis favoritas para trabajar POTA en México.
No duden en comprar la suya !! 73
He tenido la oportunidad de probar la antena durante aproximadamente una semana y los resultados han sido altamente satisfactorios. Esta antena, diseñada para uso flexible tanto portátil como en base, abarca las bandas de 10, 15, 20 y 40 metros. Su instalación ha sido un éxito, logrando un montaje firme con un mástil de al menos 35 pies (11 metros) y vientos.
Lo notable es que no se requiere un sintonizador adicional; simplemente cambiando la banda mediante el conmutador de la antena, evitas la necesidad de utilizar equipos adicionales. La antena es liviana y presenta terminaciones muy profesionales. La he instalado de forma independiente y he podido trabajar varios DX en distintos modos como CW, RTTY, FONIA y FT4 en las diversas bandas, ya sea con 100 watts o con un amplificador (HLA 300 Black RM Italy).
Lo más impresionante es la calidad del sonido de recepción: nítido y prístino. En algunas ocasiones, he logrado ingresar a pile-ups con informes positivos. Esta antena resulta perfecta para actividades como POTA, BOTA, Field days, y otras situaciones donde se requiera una antena multibanda práctica, liviana, flexible y fácil de montar. Una vez sintonizada cerca de los 7.100 MHz, las demás bandas quedan afinadas automáticamente.
En resumen, después de una semana de pruebas, la antena ha demostrado mantener consistentemente buenos resultados en DX y ha recibido excelentes informes. Comparto un enlace a un QSO entre Puerto Rico y España (EA5CCY) en fonía 20m: [enlace del video](https://youtu.be/FQXGEe8u0cU?si=k7D4UFr9vRzkW93O).