Description
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X-510MH: The Diamond X-510MH is a high performance, heavy-duty dual-band fiberglass vertical antenna designed for 2m (144 MHz) and 70cm (430 MHz) amateur radio bands. Known for its exceptional reach, it is favored by fixed base stations for reliable VHF/UHF operations and repeater work.
Features:
Fiberglass Construction: Fully weatherproofed, making it highly durable against harsh environmental conditions like ice, rain, and strong winds.
Pre-Tuned: Requires no physical cutting or tuning prior to installation.
Included Radials: Comes with 3 radials (approx. 52 cm long) to achieve proper ground planes and VSWR (less than 1.5:1)
Installation:
Mounting Height: Because of its height, mounting it higher up significantly improves VHF/UHF propagation and line-of-sight range
Mast Size: It mounts easily on masts ranging from 30 mm to 60 mm in diameter using the included brackets.
Sealing: Many amateur radio operators in forum discussions suggest sealing the antenna’s threaded joints with silicone to prevent long term moisture ingress
Specifications:
Frequency: 144/430 Mhz
Gain: 8.3dBi (144MHz) and 11.7dBi (430MHz)
Maximum power: 350W
Radial length 52cm
Impedance: 50 Ohms
VSWR: Less than 1.5:1
Accepted mast diameter: 30mm to 60mm
Type: 3×5 / 8 wave C-Load (144MHz), 8×5 / 8 wave C-Load (430MHz), FRP outer shell
Connector: SO239 (UHF female)
Length: 5.2m
Weight: 2.1kg
