Sirio CX-425 3/4 Wave J-Pole Antenna


Enhance your radio communications with the Sirio CX-425 3/4 Wave J-Pole Antenna, optimized for 425-440 MHz frequencies. Offering a gain of 2 dBd – 4.15 dBi and a 360-degree radiation pattern, this antenna ensures superior omnidirectional coverage.


Optimized for Amateur and Commercial Communications

The Sirio CX-425 J-Pole Antenna is a robust and efficient solution designed for both amateur and commercial radio communications within the 425-440 MHz band. Featuring a 3/4 wave coax J-Pole design, this antenna is engineered to provide exceptional performance with a vertical polarization and an omnidirectional radiation pattern.

Key Features

  • Frequency Range: Optimally tuned for 425-440 MHz, making it ideal for various communication needs.
  • Gain: Offers a solid gain of 2 dBd – 4.15 dBi, enhancing signal strength and reception quality.
  • Bandwidth: Broad bandwidth at SWR 2:1 over 30.7 MHz ensures stable and reliable connectivity.
  • Impedance: Standard 50 Ohms unbalanced, compatible with a wide range of transceivers.
  • Radiation Efficiency: Features a 360-degree horizontal plane radiation and a 60-degree beamwidth on the E-Plane, ensuring comprehensive coverage.
  • SWR: Engineered for minimal standing wave ratio at resonance frequency for improved transmission efficiency.
  • Max Power: Can handle up to 200 Watts, suitable for high-powered operations.
  • Durability: Built to withstand wind loads up to 25 N at 150 Km/h and resistant to wind speeds up to 180 Km/h.
  • Installation: Easy to mount with a 35-42 mm mast diameter compatibility and includes a durable N-Female base connector.
  • Compact and Lightweight: Measuring only 603 mm in height and weighing approximately 450 grams, it offers a compact setup without compromising on performance.

Ideal for Various Applications

The Sirio CX-425 is perfect for radio enthusiasts and professionals who require a reliable antenna that provides wide area coverage and consistent performance. Whether for use in commercial radio systems, amateur radio setups, or emergency communication stations, this antenna ensures superior communication capabilities.

Sirio CX-425 3/4 Wave J-Pole Antenna

Enhance Your Communication System

Upgrade your communication setup with the Sirio CX-425 3/4 Wave J-Pole Antenna. With its easy installation, exceptional durability, and powerful performance, it is an excellent choice for serious communicators looking to enhance their radio system’s effectiveness and reliability.

Additional information

Weight10 kg