Diamond X-510MH 144/430MHz 350W High-Power Dual Band Base Antenna
SKU Part Number: X-510MH
High-Power 2m / 70cm Base Antenna Diamond X-510MH 144/430MHz High-Power...
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High-Power 2m / 70cm Base Antenna

Diamond X-510MH 144/430MHz High-Power Dual Band Base Antenna

The high-power version of Diamond's popular X-510 series, offering 350W power handling, excellent 2m and 70cm gain and an SO-239 antenna connection.

The Diamond X-510MH is a high-performance 144/430MHz dual-band base antenna designed for operators who want the excellent gain and coverage of the X-510 platform with substantially increased power handling.

Offering up to 350 watts maximum power handling, the X-510MH is particularly well suited to higher-power VHF and UHF installations while retaining the same impressive 8.3dBi gain on 2 metres and 11.7dBi gain on 70 centimetres.

Unlike the X-510N, which uses an N-type socket, the X-510MH is fitted with an SO-239 UHF female connector, making it convenient for installations using standard PL-259 terminated coaxial cable.

350W Power Handling

High-power design for demanding 2m and 70cm base station installations.

High Gain

8.3dBi on 144MHz and 11.7dBi on 430MHz for excellent fixed-station performance.

SO-239 Connection

UHF female socket for direct connection to coax fitted with a PL-259 plug.

5.2 Metres Long

Large dual-band vertical designed for maximum gain from a fixed installation.

High-Power Version of the X-510

The X-510MH is closely related to the well-known Diamond X-510N, sharing its overall 5.2 metre length, dual-band design and high gain figures.

The key difference is its increased 350W power rating, compared with 200W for the standard X-510N, making the X-510MH an excellent choice for stations using higher-power VHF or UHF equipment.

X-510MH at a Glance

Same high-gain 2m/70cm format as the X-510N, but with 350W power handling and an SO-239 connector.

High-Gain Phased Vertical Design

The X-510MH uses a phased vertical element system to achieve high omnidirectional gain on both amateur bands.

  • 144MHz: 3 x 5/8-wave C-Load phased vertical
  • 430MHz: 8 x 5/8-wave C-Load phased vertical

This makes it particularly suitable for repeater access, local and regional simplex operation and other fixed-station applications where strong horizontal coverage is required.

Rugged Fibreglass Construction

The antenna elements are protected inside a durable FRP fibreglass outer shell, providing a robust and weather-resistant installation suitable for permanent outdoor use.

The antenna is rated for wind speeds of up to 40 metres per second and is suitable for mounting on masts approximately 30 to 60mm in diameter.

Technical Specifications

Specification Details
Frequency 144 / 430MHz, 2m / 70cm
Gain 8.3dBi at 144MHz / 11.7dBi at 430MHz
Maximum Power 350W
Impedance 50 Ohms
VSWR Less than 1.5:1
Length 5.2m
Radial Length Approx. 52cm
Weight Approx. 2.08kg
Connector SO-239, UHF female
Mast Diameter 30 to 60mm
Rated Wind Velocity 40m/s
144MHz Element 3 x 5/8-wave C-Load phased vertical
430MHz Element 8 x 5/8-wave C-Load phased vertical
Construction FRP fibreglass outer shell

Key Features

  • 144/430MHz dual-band base antenna
  • 350W maximum power handling
  • 8.3dBi gain on 2 metres
  • 11.7dBi gain on 70 centimetres
  • 5.2 metre overall length
  • SO-239 UHF female connector
  • 50 Ohm impedance
  • VSWR less than 1.5:1
  • High-gain phased vertical design
  • Weather-resistant FRP fibreglass construction
  • Rated for wind speeds up to 40m/s
  • Suitable for mast diameters from approximately 30 to 60mm

X-510MH vs X-510N

X-510MH X-510N
Maximum Power 350W 200W
Connector SO-239 N-Type Female
Gain 8.3 / 11.7dBi 8.3 / 11.7dBi

Shipping:

We have several shipping options for our products, including next-day and Saturday/Sunday delivery for certain items. Please see these options at checkout.

Returns:

If you have any equipment that needs to be returned to Martin Lynch & Sons, please fill out the form below:

Click here for returns form

Upon receipt of goods you have 14 days to return goods however the goods must be returned in original packaging and care must have been taken with the goods you wish to return. Under distance selling regulations you are not entitled to any refund on carriage charges or modification charges made at your request. Large items cannot be returned if they have been assembled, unless faulty.

Warranty Terms and Conditions

Outside of the 14 faulty return period, returned items cannot be accepted, unless covered by manufacturer's warranty. We will repair as much as possible on site however in exceptional circumstances products may have to be returned to the manufacturer of distributor.

For repairs/replacements under manufacturer’s warranty for any item please download a ML&S return form from the link above and return to ML&S with the faulty product.

International Warranty information

Warranty service for items we sell is available in the U.K. only, unless otherwise noted. It is your responsibility to pay freight for returned items to the U.K. and back to you for desired warranty coverage. All of our NEW products come with a minimum 12 month warranty, (Yaesu & Icom 24 months), with up to 90 days on second-hand equipment. Items returned for service must state "returned goods for repair" on the return air waybill or U.K. import customs duties apply and will be added to your invoice. For more info about returning items please contact our customer help desk, [email protected]