Product Overview

The Grazioli Multiband 1/4 λ Ground Plane Antenna is a rugged, base-fed vertical designed for HF bands (20, 17, 15, 12, 10m) and VHF 6m, delivering omnidirectional radiation and linear-vertical polarization. Built for high-performance DX and contesting, it handles up to 3 kW continuous input power and offers broad SWR bandwidth across key amateur bands.

Key Features

• Frequency coverage: HF 20, 17, 15, 12, 10m + VHF 6m

• Base-fed 1/4 λ vertical design with omnidirectional pattern

• Impedance: 50Ω unbalanced

• Polarization: Linear-vertical

• Gain: 0 dBd / 2.15 dBi

• SWR bandwidth:

  • ≥ 2:1 across 20, 17, 15, 12m

  • ≤ 1.5:1 on 10m & 6m

• Power handling: Up to 3 kW continuous all-mode

• Wind resistance: Up to 130 km/h (braked)

• Wind surface area: 0.4 m²

• Mounting bracket: ø 40–54 mm mast compatibility

Materials & Build Quality

• AW6063-T66 aluminium alloy: Hard-drawn tubing for precision and durability

• Fibreglass insulators: High strength and weather resistance

• Brass and PTFE components: For optimal RF performance and thermal stability

• Stainless steel hardware: AISI 304 & 316 for corrosion-free longevity

• Stylus length: 6.2 m

• Radial length: 2.7 m

• Total height: 6.75 m

• Weight: 7.8 kg

Technical Advantages

• Multiband coverage without traps or tuners

• High-efficiency RF transfer with minimal loss

• Engineered for DX, contesting, and high-noise environments

• Durable construction for long-term outdoor deployment.