Diamond A144S10R 2m Yagi Antenna 10 Element, 11.6dBi Gain, 144-146MHz, 50W, SO-239, Factory Tuned

The Diamond A144S10R is a high-gain, 10-element Yagi directional antenna for the 2-metre amateur radio band (144–146 MHz). With an impressive 11.6 dBi gain and a front-to-back ratio of >15 dB, it delivers excellent directional performance for weak signal DX work, EME (moonbounce), satellite operation, and long-distance 2m contacts. Factory pre-adjusted with no tuning required, it's ready to install straight out of the box. At just 1.1kg with a 2.13m boom length and a compact turning radius of 1.45m, it offers outstanding gain-to-size ratio — making it ideal for operators with limited space or rotator capacity. Mounts on masts of 25–47mm diameter via SO-239 (UHF-Female) connection.

Key Features

• 11.6 dBi gain — high gain for its compact size
• 10 elements
• Front-to-back ratio: >15 dB
• Frequency: 144–146 MHz (2m amateur band)
• 50W power handling
• VSWR: <1.3:1 typical
• Factory pre-adjusted — no tuning required
• SO-239 (UHF-Female) connector
• Boom length: 2.13m | Turning radius: 1.45m
• Lightweight: 1.1kg
• Mast diameter: 25–47mm
• Wind surface area: 0.16 m²
• Ideal for DX, EME, satellite & weak signal 2m operation
• Made by Diamond Antenna (Japan)

Technical Specifications

• Type: 10-element Yagi directional antenna
• Frequency: 144–146 MHz
• Gain: 11.6 dBi
• Elements: 10
• Front-to-back ratio: >15 dB
• Max power: 50W
• Impedance: 50Ω
• VSWR: <1.3:1 typical
• Connector: SO-239 (UHF-Female)
• Boom length: 2.13m
• Turning radius: 1.45m
• Dimensions: 2130 x 1090 x 73mm
• Weight: 1.1kg
• Mast diameter: 25–47mm
• Wind surface area: 0.16 m²
• Country of origin: Japan