Moonraker SQBM412 4m Band 70MHz Ham Base Antenna, 100W, 3dB Gain, 1/2 Wave, Pre-Tuned

The Moonraker SQBM412 is a pre-tuned, fully weatherproofed 1/2-wave fibreglass base station antenna for the 4-metre amateur radio band (70–72 MHz) — a band unique to the UK and a handful of European countries, making this a specialist antenna for 4m operators. With 100W power handling, a gain of 3 dB, and a VSWR of <1.5:1, it delivers solid omnidirectional performance straight out of the box with no tuning required. The GRP (fibreglass) outer shell provides excellent weather and UV resistance for long-term outdoor installation. Mast mounting brackets and radials are included. Mounts on masts of 30–62mm diameter and is rated to withstand wind velocities of 60 m/s.

Key Features

• Pre-tuned for 4-metre band (70–72 MHz) — no tuning required
• 100W power handling
• Gain: 3 dB
• VSWR: <1.5:1
• 1/2-wave design
• GRP (fibreglass) outer shell — fully weatherproofed
• SO-239 (UHF-Female) connector, 50Ω impedance
• Mast mounting brackets & radials included
• Mast diameter: 30–62mm
• Rated wind velocity: 60 m/s
• Length: 1.5m
• Weight: 0.7kg
  

Technical Specifications

• Type: 1/2-wave fibreglass base antenna
• Frequency: 70–72 MHz (4-metre band)
• Gain: 3 dB
• Max power: 100W
• Impedance: 50Ω
• VSWR: <1.5:1
• Connector: SO-239 (UHF-Female)
• Mast diameter: 30–62mm
• Wind rating: 60 m/s
• Length: 1.5m
• Weight: 0.7kg