The Shortwave Automatic Antenna Tuner is an expertly engineered device designed for seamless and efficient performance across a broad spectrum of frequencies, covering the amateur radio HF band from 1.8 to 30MHz. Featuring a dynamic setup of 7 capacitors and 7 inductors, it ensures optimal functionality in diverse configurations. Key Features: Versatile Frequency Range: Operates effectively across the HF band, providing reliable tuning for amateur radio enthusiasts. Quality Construction: Built from high-quality materials, it boasts wear resistance and stable, reliable performance. Rechargeable Power: Equipped with a built-in 3.7V, 1800mAh lithium battery that can be easily recharged via a Type-C cable. Clear Display: A 0.91-inch OLED display provides clear and easy-to-read data, enhancing user experience. Automatic Tuning: Automatically tunes without the need for control wires, making it suitable for most radio stations. User-friendly Operation: Features a simple one-button on/off system for effortless use. Operating Instructions: Connect the radio, antenna tuner, and antenna. For initial use, set the radio or power amplifier output power between 20-30W to prevent potential damage from high-power tuning. Set the radio mode to frequency modulation. Select the antenna band and use 20-30W power in frequency modulation mode. Press the radio PTT and monitor the ATU antenna tuner's PWR and SWR. The ATU button has two functions: a short press (less than 1 second) resets it, while a long press (more than 1 second) initiates tuning. If the SWR is greater than 2.0 during transmission, the antenna may be detuned. Use the antenna tuner by holding the ATU button to adjust, aiming for an SWR below 2.0 for optimal performance. If the SWR exceeds 3.0 post-tuning, limit transmission power to below 30W. Specifications: Name: ATU100 Tuner Material: Aluminum alloy Color: Black Display: 0.91-inch OLED Charge: USB Type-C cable Battery: 3.7V, 1800mAh lithium battery Voltage: Typical +12V (DC10-15V, 13.8V) Working Frequency: 1.8-55MHz Maximum Current Consumption: 400mA Maximum Working Power: 100W Maximum Possible Measurement Power: 150W Minimum Power Required to Start Tuning: 5W Minimum Possible Measurement Power: 0.1W Measurement Steps: Up to 10W: 0.1W | Above 10W: 1W Power Measurement Accuracy: 10% Maximum Installation Inductance: 8.53uH Minimum Installation Inductance Step Length: 0.05uH Maximum Installation Capacitance: 1869pF Minimum Installation Capacitance Step Length: 10pF Panel Buttons: 3 (ON/OFF, AUTO, TUNE) Item Size: 160 x 90 x 40mm Item Weight: 413g Package Size: 175 x 122 x 55mm Package Weight: 465g Packing List: 1 x ATU100 Tuner 1 x Type-C Cable
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