Sirio CX-4-78 VHF Band Base Antenna


The Sirio CX-4-78 VHF Band Base Antenna is the ultimate solution for professionals seeking exceptional performance and reliability. Designed with precision, this base antenna operates flawlessly within the frequency range of 78 to 83 MHz.


Equipped with state-of-the-art protection from static discharges through its DC-Ground feature, you can rely on this antenna to deliver uninterrupted signals in any weather conditions. With a remarkable gain of 2 dBd – 4.15 dBi, it ensures superior signal strength and clarity, making it perfect for professional use.

Crafted using premium-quality materials such as aluminium, brass, stainless steel, and nylon, this antenna guarantees durability that withstands the test of time. Its robust construction not only enhances longevity but also delivers optimal performance under challenging circumstances.

Standing tall at an adjustable height ranging from 2700 mm to 3360mm and weighing merely 1900 g, this unit offers unparalleled flexibility without sacrificing stability or portability. The mounting mast has a diameter ranging from Ø 35 – 42 mm ensuring easy integration into existing setups.

Whether you’re involved in telecommunications, public safety operations or require crystal-clear communication for your business premises – the Sirio CX-4-78 VHF Band Base Antenna is here to meet all your needs with supreme professionalism. Rely on its unmatched capabilities to provide reliable connections when they matter most.

Key Features:

  • Low-gain, Omnidirectional
  • Base station antenna, Mono-band
  • Made of aluminium alloy 6063 T-832
  • Protection from static discharges DC-Ground

Electrical Data

Type 3/4 λ coaxial J-pole
Impedance 50Ω
Radiation (H-plane) 360°C Omnidirectional
Radiation (E-plane) Beamwidth -3 dB = 60°C
Radiation Angle 3°C
Frequency Range Tunable 78 – 83 MHz
Polarization Linear Vertical
Gain 2 dBd – 4.15 dBi
Bandwidth SWR ≤1.5 ≥ 2.5 MHz 78 MHz
Max Power (CW) 30°C 500 Watts
Connector UHF-female


Mechanical Data

Materials Aluminium, Brass, Stainless Steel, Nylon
Dimensions From 2700 to 3360 mm
Weight 1900 g
Mounting Mast Ø 35 – 42 mm
Wind Load 97 N 150 km/h
Resistance 150 km/h
Wind Surface 0.08 m²

Additional information

Weight 2.2 kg