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Call 0345 2300 599The OptiBeam OB1-40 is a high-efficiency shortened rotatable dipole designed for the 40m amateur band.
Built as a 1 element 40m / 7MHz monoband rotary dipole, the OB1-40 is ideal for operators who want strong 40m performance without installing a full-size wire dipole or larger beam system. Its shortened design makes it more practical for fixed station installations, while still offering excellent efficiency and bandwidth.
A key feature of the OB1-40 is the specially designed OptiBeam Air Coil, which helps keep losses extremely low while maintaining a manageable antenna length. The result is a compact, high-performance 40m dipole with excellent bandwidth and low SWR.
Key Features
- High-efficiency 40m monoband rotatable dipole
- 1 element rotary dipole for the 7MHz band
- Shortened design for more practical installation
- Specially designed OptiBeam Air Coil for very low loss
- Excellent bandwidth for a shortened 40m antenna
- Low SWR after correct installation and adjustment
- Suitable for fixed station use
- Ideal for operators wanting improved 40m performance from a rotatable antenna
- Strong alternative to a full-size wire dipole where space is limited
Specifications
| Specification | Details |
|---|---|
| Brand | OptiBeam |
| Model | OB1-40 |
| Product type | 40m monoband rotatable dipole |
| Antenna type | 1 element rotary dipole |
| Band | 40m |
| Frequency | 7MHz amateur band |
| Gain | 7.2dBi |
| Length | 14.60m |
| Weight | 11kg |
| Loading system | OptiBeam Air Coil |
Typical Uses
- Fixed station 40m operation
- Rotatable 40m antenna installations
- Operators wanting better 40m directivity than a fixed wire antenna
- Limited-space stations where a full-size 40m dipole is not practical
- HF contesting and DXing on 40m
- Permanent mast or tower installations
Installation Notes
The OB1-40 is designed for fixed installation on a suitable mast or tower. As with any HF antenna, final performance will depend on installation height, surrounding structures, feedline quality, grounding, and correct adjustment.
Please ensure that your support structure, rotator, mast, and mounting hardware are suitable for the antenna length, weight, and expected wind loading.
Important Note
This listing is for the OptiBeam OB1-40 antenna only. Mast, rotator, coaxial cable, mounting hardware, and other station accessories are not included unless stated otherwise.
Please check that your installation site, support system, and rotator are suitable before ordering.
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]