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Compact automatic antenna tuner covering 1.8 to 54MHz with up to 120W RF handling on SSB/CW, straightforward front-panel operation and fully automatic or semi-automatic tuning.
During a tuning cycle, transmitter output must be reduced to between 5W and 15W.
The mAT-TUNER mAT-125S is a general-purpose automatic antenna tuner designed for use with virtually all brands and models of HF transceiver. Covering 1.8 to 54MHz, it provides a simple external tuning solution for HF and 6 metre operation.
The tuner supports a maximum RF input of 120W on SSB/CW and 30W when operating digital modes. A full tuning cycle typically takes less than five seconds.
Unlike radio-specific tuners that require a dedicated control interface, the mAT-125S uses the RF signal itself to perform tuning. This makes it a versatile option for stations using different makes and models of transceiver.
Covers the HF amateur bands through to 6 metres.
Rated for 120W SSB/CW operation and up to 30W on digital modes.
A full tuning cycle completes in less than five seconds under normal conditions.
Choose between automatic SWR-triggered tuning or manually initiated tuning.
Fully Automatic or Semi-Automatic Tuning
In Fully Automatic Mode, the mAT-125S can automatically begin a tuning cycle when the detected SWR exceeds 2.0, provided the TUNE/BYPASS switch is left in the TUNE position.
In Semi-Automatic Mode, tuning is initiated by moving the front-panel TUNE/BYPASS switch from BYPASS to TUNE while transmitting a suitable low-power carrier.
Simple, Direct Control
A series of LEDs provides a quick indication of the current SWR, while a separate PWR LED confirms the tuner's operating state.
Dedicated TUNE/BYPASS and ON/OFF switches provide direct control without requiring a radio-specific control cable.
Straightforward Station Integration
Separate ANT and RF IN UHF sockets connect the tuner between your transceiver and antenna feed line.
A ground terminal is provided for the station ground connection, while the DC input accepts 12 to 14V DC.
Set the transceiver to between 5W and 15W while performing a tuning cycle. Do not exceed 15W during tuning, as excessive tuning power may damage the tuner.
Package Includes
- 1 x mAT-125S automatic antenna tuner
- 1 x DC power cable
- 1 x Operating Manual
mAT-125S
mAT-TUNER mAT-125S
General Specifications
Controls and Indicators
- 1.5 - 3.0 LEDs: Current SWR indication
- PWR LED: Power status indicator
- TUNE/BYPASS: Online, tuning and bypass control
- ON/OFF: Main power switch
Connections
- ANT: UHF socket for antenna connection
- RF IN: UHF socket for connection to the transceiver
- GND: Ground terminal
- DC: 12 - 14V DC power input, maximum 1A
Automatic and Semi-Automatic Tuning
With the TUNE/BYPASS switch in TUNE, the mAT-125S automatically begins tuning when detected SWR exceeds 2.0.
Tuning begins when the operator moves the TUNE/BYPASS switch from BYPASS to TUNE while transmitting the required carrier.
Use a steady carrier in FM, CW or FSK at between 5W and 15W when tuning. Do not exceed 15W during a tuning cycle.
The mAT-125S is not waterproof. Protect the tuner from rain and moisture when using it in portable or outdoor installations.
- mAT-125S automatic antenna tuner
- DC power cable
- Operating Manual
RF coaxial cables are not included.
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.