Sirio SB 3 U Marine VHF Base Antenna 100W, 0dBd Gain, No Tuning, DC-Ground, 156-163MHz

The Sirio SB 3 U is a high-quality, 3/4λ J-pole VHF marine band base antenna engineered in Italy for professional and leisure marine communications. Covering 156–163 MHz with no tuning required, it delivers 100W CW power handling and a gain of 0 dBd (2.15 dBi) with a clean omnidirectional radiation pattern. A key feature is its DC-ground protection, providing inherent lightning protection — essential for exposed marine installations. Connecting via SO-239 (UHF-Female), it supports on-mast or on-wall mounting and stands at 1465mm (4.81ft). Constructed from chromed brass, fibreglass, and nylon for corrosion-resistant marine durability.

Key Features

• 100W CW power handling
• VHF Marine Band coverage: 156–163 MHz — no tuning required
• Gain: 0 dBd / 2.15 dBi
• DC-ground lightning protection — essential for marine use
• Omnidirectional radiation pattern
• Linear vertical polarisation
• 3/4λ J-pole design
• On-mast or on-wall mounting
• SO-239 (UHF-Female) connector
• Height: 1465mm / 4.81ft
• Corrosion-resistant materials: chromed brass, fibreglass & nylon
• Made in Italy by Sirio

Technical Specifications

• Type: 3/4λ J-pole VHF marine base antenna
• Radiation: Omnidirectional
• Polarisation: Linear vertical
• Frequency range: 156–163 MHz (no tuning required)
• Systems: VHF Marine Band
• Gain: 0 dBd / 2.15 dBi
• Max power: 100W CW
• Grounding: DC-ground
• Connector: SO-239 (UHF-Female)
• Height: 1465mm / 4.81ft
• Mounting: On-mast / on-wall
• Materials: Chromed brass, fibreglass, nylon
• Country of origin: Italy