M2 Antennas 440-18X 420-450MHz 18 Element Yagi Antenna
SKU Part Number: M2-FG440-18X
The M2 Antennas 440-18X is a high-performance broadband Yagi antenna covering 420-450MHz. It replaces the proven M2 440-18 and forms part of M2’s...
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£275.00
Availability: In stock
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The M2 Antennas 440-18X is a high-performance broadband Yagi antenna covering 420-450MHz.

It replaces the proven M2 440-18 and forms part of M2’s compact “X” series, which has been redesigned around shorter boom sections to help keep shipping packages below 48in long. The shorter sections also make the antenna easier to transport, while thicker-wall boom sections provide added strength.

The 440-18X is computer optimised to deliver high gain, a clean radiation pattern, and strong broadband performance across the 70cm band. It can be mounted either vertically or horizontally and is well suited to stacking two or more antennas where additional gain is required.

It is ideal for applications including ATV, OSCAR satellite work, FM, long-haul tropo, and other weak-signal UHF operation.

Key Features

  • 18 element broadband Yagi antenna
  • Covers 420-450MHz
  • Replaces the earlier M2 440-18
  • Part of M2’s compact “X” series
  • Shorter boom sections help reduce oversize shipping charges
  • Thicker-wall boom sections for added strength
  • More portable than previous long-section designs
  • Computer optimised for high gain and good pattern performance
  • Can be mounted vertically or horizontally
  • Suitable for stacking two or more antennas
  • Folded dipole feed system
  • 50 ohm unbalanced feed
  • N female input connector
  • 1.5kW power handling
  • Lightweight yet robust construction

Typical Uses

  • 70cm amateur radio operation
  • ATV
  • OSCAR satellite work
  • FM
  • Long-haul tropo
  • Weak-signal UHF operation
  • Contest and DX installations
  • Horizontal or vertical base station installations
  • Stacked antenna arrays

Construction

The 440-18X uses M2’s driven element module, designed for strong weather resistance and high power handling.

All connectors are O-ring sealed to the CNC-machined block, while internal connections are sealed in silicone gel for long-term electrical reliability. The balun coax connectors are triple O-ring sealed.

Key mechanical and electrical parts are CNC machined from 6061-T6 aluminium, while all hardware except the U-bolts is stainless steel.

Specifications

Specification Details
Brand M2 Antennas
Model 440-18X
Frequency range 420-450MHz
Gain 16.5dBi
Front to back 24dB typical
Beamwidth E-plane: 27° / H-plane: 32°
Feed type Folded dipole
Feed impedance 50 ohms unbalanced
Maximum VSWR 1.5:1 average
Input connector N female
Power handling 1.5kW
Boom length / diameter 135in / 1in to 3/4in
Maximum element length 14in
Turning radius 69in*
Stacking distance 51in high / 52in wide
Mast size 2in
Wind area 0.68 sq ft
Survival wind speed 100mph
Weight 5lb
Shipping weight 7lb

Installation Notes

The 440-18X can be mounted for either vertical or horizontal polarisation, depending on the intended application.

For additional gain, two or more antennas can be stacked using the recommended spacing of 51in high and 52in wide.

As with any directional antenna, final performance will depend on installation height, feedline quality, mast position, surrounding structures, and correct alignment.

Shipping & Delivery

We offer UK and international delivery services, including next working day and selected weekend options for eligible orders. Available services, prices and estimated delivery times are displayed at checkout.

Delivery Information

Delivery options depend on the parcel's size, weight, contents and destination. Express and weekend services are subject to availability and cut-off times. Oversized or exceptionally heavy items may require a specialist delivery quotation.

Returns & Cancellations

To arrange a return, please contact ML&S or complete our returns form. You may also exercise your statutory right to cancel by email or another clear statement, without completing the form.

Changed Your Mind?

Under the Consumer Contracts Regulations 2013, most purchases made online or by telephone can be cancelled within 14 days of receipt.

You must notify us of your cancellation within this period and return the goods within a further 14 days.

Please handle all goods with care. Returned items must be in a resaleable condition, complete with their original packaging, and all supplied accessories.

You may inspect goods as you would in a shop. Handling beyond what is necessary to inspect them may result in a lawful deduction for diminished value.

Exceptions

Modified Equipment & Reversal Charges

Additional return conditions may apply to equipment modified at the customer's request, including wideband transmit or receive modifications.

ML&S may charge a reasonable fee to reverse physical modifications and restore the equipment to its original factory specification. Any such charge will be agreed in advance and deducted from your refund.

 

Custom-Made Cable Assemblies

Coaxial cable assemblies manufactured to a customer's specifications are excluded from the 14-day return policy and are non-refundable unless faulty.

 

Software & Labour Charges

Labour and modification charges requested by the customer are non-refundable once the work has been completed.

Computer software may only be returned under the 14-day return policy if it remains sealed and unopened.

Return Postage Charges

Customers are responsible for the direct cost of returning unwanted or incorrectly ordered goods, where permitted by law. You may arrange your own suitable return postage or use one of our optional prepaid services.

Standard Parcels

Royal Mail Return Label

£5.95

Per parcel

For eligible standard-sized parcels, subject to Royal Mail restrictions. Free collection included.

Larger Parcels

DPD Return Label

£7.95

Per parcel

For larger or heavier parcels and any shipments with batteries.

Collection Service

DPD Collection

£25.00

Per parcel

Available upon request for eligible addresses, subject to availability.

Prepaid return charges will be confirmed before booking and deducted from your refund.

These prices apply to eligible UK mainland returns. Oversized items, specialist products and returns from other destinations may require a separate quotation. Estimated return costs will be disclosed before purchase.

Faulty or Incorrectly Supplied Goods

Return postage charges do not apply to faulty, damaged or incorrectly supplied goods returned under statutory rights. ML&S will arrange a free return in these circumstances.

Refunds

Refunds are processed without undue delay following receipt and inspection of returned goods, and no later than 14 days after we receive goods returned under statutory cancellation rights.

Refunds will be issued to the original payment method. Any prepaid return postage charges or lawful deductions for diminished value will be itemised.

Warranty Terms & Conditions

New Equipment Warranty

Minimum 2-Year Warranty

All new products supplied by ML&S carry a minimum two-year warranty against manufacturing defects, excluding batteries, which are covered by separate warranty terms.

Some manufacturers provide extended warranties, such as the three-year warranty available on eligible Yaesu equipment. Any additional coverage is subject to the manufacturer's terms and conditions.

Our workshop may assess and repair faulty equipment on site or refer it to the manufacturer or an authorised service centre where necessary.

Warranty exclusions may include batteries, normal wear and tear, accidental damage, misuse and unauthorised modifications, as specified in the applicable warranty terms.

All warranties are provided in addition to your statutory consumer rights against ML&S, which are not limited by the warranty period.

International Returns & Warranty

Unless otherwise stated, ML&S warranty servicing is carried out in the UK. International customers must contact us before returning goods to confirm shipping and customs requirements.

International customers are responsible for return postage unless the goods are faulty and ML&S has been notified within a reasonable time.

ML&S accepts no responsibility for additional charges resulting from incorrectly completed customs documentation. Any additional duties charged to ML&S as a result will be billed to the customer before return of the goods.

Need Help With a Return?

Our team can assist with returns, postage arrangements, modifications and warranty claims.

Nothing in these terms excludes or limits your statutory consumer rights.