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JNCRADIO JBALUN-915, 1.8-30MHZ 500W RF BALUN CHOKE ISOLATOR, 1:1 CURRENT COAXIAL CHOKE FOR HF RADIO COMMON MODE NOISE SUPPRESSION
89.00$
- Full HF Coverage 1.8-30MHz – Complete amateur radio HF band coverage.
- 500W Stable and Cool – Aluminium housing helps dissipate heat for practical on-air operation.
- Aircraft-Grade Aluminium Housing – 6061 hard-anodised aluminium for strength and durability.
- 51 High-Permeability Mn-Zn Ferrite Beads – 3×17 bead layout for effective common-mode current suppression.
Are You Dealing with Any of These Common RFI Problems?
- Does your TV turn on by itself when you transmit?
- Do your USB devices disconnect during contest operation or high-power transmitting?
- Do you hear RF feedback or hash in your microphone audio?
- Does your Wi-Fi drop out when you get on the air?
- Are you fighting common-mode noise and stray RF on an end-fed antenna?
If any of these sound familiar, JBALUN-915 may be the RF choke your station needs.
JBALUN-915 is a 1:1 current choke RF isolator designed to be installed inline with 50-ohm coaxial feedline. It provides stable operation across the full 1.8-30MHz HF range and is rated at 500W PEP for practical amateur radio use.
Built with an aircraft-grade aluminium housing for improved heat dissipation, JBALUN-915 stays cooler during extended 500W operation, and the published rating reflects practical tested use rather than a theoretical peak claim.
Made from 6061 hard-anodised aluminium for durability, mechanical strength, and long-term outdoor suitability.
JBALUN-915 also helps reduce unwanted RF interaction with station equipment. Its 51 high-permeability Mn-Zn ferrite beads in a 3×17 layout provide effective common-mode current suppression while preserving normal antenna operation.
How It Works
In a real station, RF energy does not always stay only on the intended antenna path. When common-mode current is present on the outside of the feedline, part of the RF can travel along the coax shield, equipment chassis, or other unintended paths in the operating area.
This unwanted RF is often behind many common interference problems, including equipment disruption, audio RF feedback, USB instability, stray RF in the shack, and inconsistent antenna performance.
JBALUN-915 helps control common-mode current on the feedline so the feedline radiates less and more RF energy stays on the path where the antenna is intended to do the work.
Recommended Installation Location
- Install the JBALUN-915 inline with the feedline, as close to the transceiver as practical.
- In special RFI cases, the installation position may be adjusted based on station layout and feedline behaviour.
Installation Steps
- Connect the coax from the antenna to one end of the JBALUN-915.
- Use a short coax jumper to connect the other end of the JBALUN-915 to the transceiver.
- Make sure all coax connections are tight and secure.
- Check antenna SWR at low power, typically under 10 watts, before full-power operation.
Typical Applications
- A Solid Choice for Contest Stations
For contest stations where clean audio, stable RF performance, and reduced shack RF matter, JBALUN-915 helps keep the feedline under control. - A Practical Upgrade for Indoor Antenna Setups
If you operate from an apartment, HOA-restricted property, or other indoor setup, JBALUN-915 can help reduce unwanted RF in the shack. - Well-suited for End-Fed Antennas
End-fed antennas such as EFHW systems are often more sensitive to common-mode current, making a feedline choke especially useful. - Also Useful with Dipoles and Vertical Antennas
JBALUN-915 is not limited to end-fed antennas. Dipole and vertical antenna systems can also benefit when unwanted RF is present on the feedline. - Built for Mobile and Portable HF Operation
For mobile, portable, RV, and field operation, the aluminium housing adds mechanical strength and long-term durability.
Specifications
| Spec Item | Details |
|---|---|
| Model | JBALUN-915 |
| Frequency Range | 1.8-30MHz |
| Power Rating | 500W PEP |
| Connector Type | UHF Female |
| Housing Material | 6061 Hard Anodised Aluminium |
| Ferrite Bead Configuration | 51 high-permeability Mn-Zn ferrite beads (3×17 layout) |
| Internal Coax | RG303 Coax (15cm built-in) |
| Contact Plating | Nickel-Plated Copper + PVDF |
| Dimensions | 6.7 in L × 1.5 in Dia |
| Weight (Without Packaging) | 0.3KG / 0.66LB |
| Design Feature | Designed to help preserve normal antenna tuning and performance |
| Recommended Applications | Fixed station, mobile use, indoor and outdoor operation |
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.