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Dual Beam Pro HF Antenna
SKU Part Number:
PRO-BEAM
Exclusive to Martin Lynch
The Dual Beam Pro is a centre-fed horizontal dipole using a non-resonant, capacitive end-loading design to provide a...
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Exclusive to Martin Lynch
The Dual Beam Pro is a centre-fed horizontal dipole using a non-resonant, capacitive end-loading design to provide a low-noise solution optimising performance and size.
The antenna provides a broad match across 9 HF bands but an external ATU is required to allow all the bands to be tuned.
Available in two variants, 400w and 1000w
This is an extremely lightweight centre-fed dipole antenna with a slim attractive profile, measuring just 5m overall. It can be readily roof-mounted like a TV aerial or attached to a mast with minimal loading.
The "beam" is bi-directional in that it radiates 2 lobes at right angles to the main element. It can be fixed in your preferred transmission directions or fitted on a lightweight rotator.
The Dual Beam Pro is a non-resonant design which presents a broadband match. Most modern transceivers have built in ATUs that may provide a match for some bands but an external ATU will be required to access all the bands.
The band coverage includes 40m, 30m, 20m, 17m, 15m, 12m, 11m, 10m & 6m. Note 40m efficiency is down relative to the other bands.
The Dual Beam Pro and I-Pro Home have been thoroughly tested using LDG ATUs and 25m feeder. The feeder length is a compromise between efficiency and ease of tuning. A longer cable will result in higher losses but it will reduce the SWR seen by the ATU and make the antenna easier to tune.
Please Note
The efficiency of the antenna is reduced for the 40m and 30m bands due to the higher cable losses.
The antennas are not designed for 80m but reception may be possible at a reduced level.
The SWR may be affected slightly by the height and local environment
The SWR measurement will be affected strongly by the cable length/attenuation
The LDG Z11 Pro is ideal for operation up to 100W. To assess the suitability of other ATUs, a tuning range of 6 - 1000 Ohms is recommended for operation across the full range of bands.
As discussed above, the demand on the ATU can be reduced by increasing the feeder length, at the cost of greater power loss in the cable.
Tech Specification
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
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
Requirements
The Dual Beam Pro requires an external ATU for operation across the full range of bands.
The masthead 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.
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:
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]