Malahit ATU-100 Antenna Tuner
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The Malahit ATU-100 EXT is a compact, fully assembled automatic antenna tuner covering 1.8 to 50 MHz, built around the popular N7DDC 7x7 open-source design with updated 3.2 firmware. It features a small 0.96-inch OLED display that shows tuning status and SWR readings in real time, making it easy to use in the field or at a home station. Overall it offers a solid entry point into automatic tuning at a budget-friendly price, though the absence of an internal battery means an external power source is always required.
Key Features & Specs
| Frequency Range | 1.8 to 50 MHz covering HF and 6-meter bands |
|---|---|
| Tuner Design | N7DDC 7x7 open-source automatic tuner circuit with 3.2 firmware pre-loaded |
| Display | 0.96-inch OLED screen showing SWR, inductance, and capacitance values |
| Power | Powered via included USB cable; no internal battery, requires external 5V USB source |
| Assembly | Fully assembled and housed in a protective enclosure, ready to use out of the box |
| Power Handling | Rated for up to approximately 100 watts SSB/CW input power |
| Compatibility | Works with most HF transceivers featuring an antenna tuner control port or manual start button |
Best for: Amateur radio operators and ham radio enthusiasts looking for an affordable, ready-to-use automatic antenna tuner for HF portable or home station use who do not need a self-contained battery-powered unit.