Sirio GPA 27-45 Ground Plane Antenna


Experience exceptional performance and reliable signal coverage with the Sirio GPA 27-45 Ground Plane Antenna. Designed for all, this professional-grade quarter-wave tunable antenna guarantees top-notch communication capabilities across various frequencies.


Benefit from its wide frequency range, adjustable from 27 to 45 MHz, providing unparalleled versatility for your specific needs. Whether you’re a seasoned radio enthusiast or require seamless connectivity in a professional setting, this antenna delivers outstanding results every time.

Its unrivaled power handling capability sets the Sirio GPA 27-45 apart from the rest. With a maximum power capacity of 1000 W (CW) continuously and an impressive short-time output of up to 3000 W (CW), this antenna ensures optimal performance under any circumstances.

Crafted using high-quality materials such as aluminium, chromed brass, and nylon, expect durability that withstands even the harshest weather conditions. Weighing just at 1250 g and boasting a radial length of 2680 mm, it strikes the perfect balance between portability and functionality.

Furthermore, the Sirio GPA 27-45 is equipped with a SO-239 connector (UHF-female), ensuring effortless installation into your existing setup while maintaining impeccable signal integrity.


  • Base station antenna from 27 MHz (CB band) to 45 MHz (VHF)
  • Unity-gain (2.15 dBi)
  • Omnidirectional
  • Low radiation angle for excellent DX
  • High power handling capability
  • Made of aluminium alloy 6063 T-832
  • Tunable by whips length adjusting (tuning diagram included)
  • Side mast mounting allowed by optional bracket FT-2 code 2510004.00

Electrical Data:

  • Type: 1/4 wave ground plane
  • Frequency range: tunable from 27 to 45 MHz
  • Impedance: 50 Ohm
  • Radiation (H-plane): 360° omnidirectional
  • Polarization: linear vertical
  • Gain: 0 dBd, 2.15 dBi
  • Bandwidth @ SWR 2:1: 2500 kHz (230 channel) @ 27 MHz
  • SWR @ resonance: 1.2:1
  • Max. Power: 1000 W (CW) continuous, 3000 W (CW) short time
  • Feed System / Position: Direct / Center
  • Connector: SO-239 (UHF-female)

Mechanical Data:

  • Materials: Aluminium, Chromed brass, Nylon
  • Wind Load / Resistance: 126 N at 150 km/h / 130 km/h
  • Wind surface: 0.11 m²
  • Height: 4730 mm from stylus top to radial bottom
  • Height (from base mount): About 2.75 m @ 27 MHz
  • Weight: 1250 g
  • Radial Length: 2680 mm

Additional information

Weight7 kg