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Dual Beam Pro Specifications

The Dual Beam Pro is constructed from aluminium alloy tubes with an insulating GRP rod in the centre. A 4:1 voltage transformer provides a balanced to unbalanced interface to the feeder and transforms the impedance to give a broad match across the HF bands.

Physical

Length 5.0m (16ft)

Width 2.5m (8ft)

Turning radius 2.8m (9ft)

Weight 4kg (9lbs)

Peak Envelope Power (PEP)

Version 400 1000

Max 20 - 6m bands 400W 1000W

Max 40 - 30m bands 240W 600W

What is PEP?

Radiation pattern

The Dual Beam Pro has 2 main radiation lobes transmitting perpendicular to the main elements.

The typical directional gain relative to a theoretical antenna radiating equally in all directions (Isotropic gain) is:

20m: 6.6dBi @ 29 degrees elevation

15m: 7.6dBi @ 19 degrees elevation

10m: 7.4dBi @ 15 degrees elevation

Dual Beam Pro Installation

The mast head support bracket is suitable for 32 - 50mm (1.25 - 2 inch) diameter masts. The mast can be stand alone or a support pole attached to a building.

There is no minimum height for mounting the Dual Beam Pro but it should be at least 1m above ground and at least 1m away from other antennas mounted on the same support.

There is no maximum mounting height. Generally the higher the better for performance but the local environment will have a much greater influence. If you are at the top of a hill with clear views then the mast height will make little difference but if you are surrounded by buildings or other obstructions then a higher mast will be better.

The Dual Beam Pro is bidirectional in that it radiates 2 lobes at right angles to the main element and it should be installed with the lobes pointing in your preferred transmission/reception directions. The gain is not so great that you notice a marked improvement in performance but If you want more flexibility to transmit/receive in other directions at times then a rotator will ensure that you are getting the maximum performance from the desired locations.