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The CHA BV (Basic Vertical) SO-239 from Chameleon Antenna™ redefines versatility in portable antennas, offering an efficient and highly adaptable setup for single-band resonance from 40 to 6 meters. This antenna is specifically engineered to meet the needs of field operators, emergency responders, and amateur radio enthusiasts who require reliable communication in varied environments. Here’s an in-depth look at what makes the CHA BV exceptional:
Key Components and Features
- Sturdy Ground Mounting with CHA SPIKE MOUNT
The CHA SPIKE MOUNT allows easy installation by driving securely into the ground, providing a stable base for the antenna. This rugged mount is designed to withstand challenging conditions and keep the antenna in position, making it ideal for temporary field setups or areas with uneven ground.
- Efficient Resonant Design with Adjustable Band Coverage
The CHA BV operates as a single-band, resonant vertical antenna for frequencies from 40 to 6 meters. Out of the box, it provides seamless operation from 20 to 6 meters, while the included Medium Loading Coil extends its reach to the 30 and 40-meter bands, adding flexibility for operators needing lower HF band access. Additionally, an optional 60 ft. The Lazy Sloper kit can be added to expand coverage further, allowing operation on 60, 75, and even 80 meters.
- High-Performance Telescopic Radiator: CHA SS17 Whip
The CHA BV uses the SS17 Whip, a durable, 17-foot telescopic whip antenna crafted from stainless steel. When fully extended, the whip resonates over a broad frequency range (up to 117 MHz) and folds down to 24 inches for easy transport. This telescopic design lets operators fine-tune the whip length to optimise resonance for specific bands, ensuring minimal SWR for improved efficiency.
- Radial System for Efficient Grounding
A critical element for unbalanced vertical antennas, the CHA BV includes four 12'6" radial wires on line winders. These radials are connected to the CHA PUCK HUB, a robust machined aluminum hub designed to anchor multiple radials. Operators can adjust the radial length as needed, coiling excess wire for higher bands, or extending them fully to support efficient 40-meter operation. This radial system enhances grounding, which is essential for stable signal propagation and minimal interference.
- Modular and Expandable within the MPAS Ecosystem
As a member of the MPAS family, the CHA BV is compatible with various Chameleon Antenna™ components, enabling easy upgrades. By integrating other MPAS accessories like the CHA Hybrid Mini or CHA Hybrid Micro transformers, users can transform the CHA BV into a broadband vertical (MPAS Lite) that operates continuously from 1.8 to 54 MHz, providing more comprehensive frequency access without needing to replace the core antenna setup. This modular approach allows users to expand and customise their equipment over time, ensuring the CHA BV remains adaptable and future-proof.
- High-Quality Coaxial Cable with Integrated RFI Choke
A 12-foot RG-58 coaxial cable with an integrated RFI choke is included, designed to reduce radio frequency interference, improving signal clarity and stability. This addition is especially beneficial for field operators where environmental factors may introduce unwanted interference.
Assembly and Tuning for Optimal Performance
Setting up the CHA BV is a quick process, often completed in less than 10 minutes by one operator. The steps involve selecting a clear area (ideally about 26 feet in diameter), driving the SPIKE MOUNT into the ground, and assembling the antenna components as per the desired band. Adjusting the telescopic whip to the correct length, fine-tuning radial lengths, and connecting to a transceiver are all straightforward tasks.
The CHA BV also supports quick band changes with a telescoping whip, which can be lengthened or shortened to achieve optimal resonance within a band. This flexibility is complemented by the antenna’s low SWR (<2.0:1) across supported bands, which can be adjusted further using the whip’s length and radial configuration.
Key Specifications
- Frequency Range: 6.9 to 117 MHz (40 - 6m amateur bands)
- Power Capacity: 300W SSB Phone, 200W CW/Digital Modes
- Height: Fully extended 17 ft., expandable to 25 ft. with optional SS25 Whip
- Weight: Approximately 4 lbs
- Connector Options: SO-239 (UHF) or BNC
- Water Resistance: Designed for outdoor durability
Extended Coverage and Additional Configurations
The CHA BV’s modular build allows it to be converted into an Inverted Lazy "L" antenna for extended low-frequency coverage. Using the optional CHA LZ SLOPER (60 ft.), the antenna can operate on 60, 75, and 80 meters. This configuration provides HF communication over longer distances, which is invaluable for emergency communications or low-frequency ham operations in remote areas.
Ideal for a Wide Range of Applications
The CHA BV’s robust design, coupled with its lightweight, modular build, makes it suitable for a range of portable operations, including:
- Field Day Operations: Lightweight yet durable for easy transport and setup in outdoor environments.
- Emergency Communications (EMCOMM): Quickly deployable, the CHA BV provides reliable communication channels for first responders and emergency personnel.
- Amateur Radio Activities: Ideal for portable amateur radio operations (e.g., Parks on the Air or Summits on the Air), providing dependable HF communications in various locations.
The CHA BV from Chameleon Antenna™ SO-239 is more than a portable antenna; it’s a fully adaptable communication solution designed for those who require performance, resilience, and versatility in the field. Built with the operator in mind, this resonant antenna delivers on both simplicity and depth of performance, making it an essential tool in any operator's equipment lineup.
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.