ATU-100 EXT Automatic Antenna Tuner
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The ATU-100 EXT is a compact automatic antenna tuner covering 1.8 to 55 MHz, designed to match impedance between your transceiver and antenna for improved signal efficiency. It features a small 0.96-inch OLED display for real-time tuning feedback and comes with pre-programmed firmware so it is ready to use out of the box. Overall it offers solid performance and convenience at an accessible price point for amateur radio enthusiasts.
Key Features & Specs
| Frequency Range | 1.8 to 55 MHz, covering HF and 6-meter bands |
|---|---|
| Display | 0.96-inch OLED screen showing SWR, power, and tuning status in real time |
| Firmware | Pre-programmed and ready to use out of the box, with USB cable included for future firmware updates |
| Tuning Speed | Automatic tuning typically completes within a few seconds depending on antenna mismatch |
| Connectivity | SO-239 antenna and radio connectors with a USB port for programming and power |
| Power Input | Powered via USB, making it easy to run from a computer, power bank, or USB adapter |
| Compatibility | Works with most HF transceivers outputting up to approximately 10 watts for reliable automatic matching |
Best for: Amateur radio operators and hobbyists who want an affordable, ready-to-use automatic antenna tuner for HF and 6-meter band operation without the need for complex setup.