MAT-TUNER mAT-125S 120W HF SSB Antenna Auto-tuner AUTO TUNER Automatic Antenna AUTO TUNER For ICOM YAESU KENWOOD Ham Radio
mAT-125S Versatile Automatic Antenna Tuner
Compact, Versatile automatic antenna tuner for HF transceivers with up to 120W power support
The mAT-125S is a compact, versatile automatic antenna tuner designed for HF transceivers. It supports a maximum RF power of up to 120 W and operates over a wide frequency range from 1.8 to 54 MHz.
The tuner is compatible with most HF transceivers on the market and is suitable for a wide variety of antennas, including long-wire, dipole, and vertical antennas. With fast tuning performance, the mAT-125S typically completes a full tuning cycle in less than 5 seconds.
The mAT-125S offers both fully automatic and semi-automatic operating modes, allowing users to choose the tuning method that best fits their operating preferences.
Its simple front-panel controls and clear SWR indication make operation straightforward and reliable in both fixed and portable installations. Designed for amateur radio operators who require a dependable and easy-to-use tuning solution, the mAT-125S provides stable performance for everyday HF operation.
The front panel of the mAT-125S is designed for simple and intuitive operation. It features a clear SWR LED indicator that provides a quick visual reference of the antenna match status. A dedicated power indicator shows the tuner’s operating state at a glance. The TUNE/BYPASS switch allows the user to select normal operation, initiate a tuning cycle, or bypass the tuner as required. A separate ON/OFF switch provides direct power control without the need to disconnect the power supply.
The rear panel of the mAT-125S provides all necessary connections for reliable station integration. It includes a UHF antenna connector for the antenna feed line and a UHF RF input connector for connection to the transceiver. A ground terminal is provided for connection to the station ground or grounding system to help ensure stable operation. The DC power jack accepts 12–14 V DC input, allowing the tuner to be powered from a regulated power supply or battery source.
Technical Specifications
| Frequency Range | 1.8 – 54 MHz |
|---|---|
| Maximum RF Power | 120 W |
| Tuning Time | < 5 seconds (typical) |
| Operating Modes | Fully automatic and semi-automatic |
| Antenna Compatibility | Long-wire, dipole, vertical antennas |
| Power Supply | 12-14 V DC |
| Connectors | UHF antenna and RF input, ground terminal |
| Dimensions | Compact design for portable use |
FAQ
Q1: What is the main difference between mAT-125S and mAT-125E?
- A: The mAT-125S requires an external 12V DC power supply, whereas the mAT-125E features built-in rechargeable lithium batteries. Both support 120W power and 1.8-54MHz frequency.
Q2: Is the mAT-125S compatible with my ICOM or Yaesu radio?
- A: Yes. The mAT-125S is a universal tuner. It senses the RF frequency automatically, so it works with almost any HF transceiver including ICOM, YAESU, and KENWOOD without needing a dedicated control cable.
Q3: Can the mAT-125S handle digital modes like FT8?
- A: Yes, but for high-duty digital modes like FT8, the recommended maximum power is 30W to protect the internal components. For SSB/CW, it handles up to 120W.
Q4: How fast does the mAT-125S tune an antenna?
- A: A full tuning cycle typically takes less than 5 seconds. If the frequency is already stored in one of its 16,000 memories, tuning is near-instant (under 0.1s).
