Icom AH-705 HF/50 MHz Automatic Antenna Tuner


Introducing the Icom AH-705 HF/50 MHz Automatic Antenna Tuner – the perfect solution to optimize your radio performance. With its compact design and impressive features, this antenna tuner is a must-have for all IC-705 users.


Covering an extensive frequency range from 1.8 MHz to 50 MHz, this tuner is capable of handling various antennas, including a 50Ω dipole or Yagi. Whether you have a 30-meter or longer antenna (1.8 – 54 MHz) or a 7-meter or longer antenna (3.5 – 54 MHz), the AH-705 has got you covered.

Equipped with a SO-239 antenna connector, this tuner ensures a seamless connection between your antenna and radio. Plus, it offers two power source options – you can use alkaline batteries or an external 13.8V DC power supply, providing flexibility in different scenarios. Just remember, it’s recommended to connect the 13.8V DC power directly to the tuner, not through the IC-705.

Designed with IP54 dust protection and water-resistant construction, the AH-705 guarantees durability and reliability. However, to prevent water from seeping into the connection, make sure to cover the connectors with adhesive tape or a jack cover.

Operating this tuner is a breeze. Simply press the [TUNER] button on your IC-705, and let the AH-705 perform its magic. The full automatic tuning feature takes care of optimizing your signal, allowing you to focus on what matters most – communication.

Now let’s dive into the specifications: the AH-705 offers a tunable frequency range of 1.8 – 54 MHz with a 30 m or longer antenna, and 3.5 – 54 MHz with a 7 m or longer antenna. It can handle a maximum input power of 10 W and operates at an input impedance of 50Ω.

For tuning, the power requirement ranges from 5W to 10W, ensuring efficient operation. The power supply options include LR6 (AA) alkaline batteries (3.0V DC) or a 13.8V DC input (±15%).

When it comes to the current drain, the tuner consumes less than 300 mA during tuning and less than 1 mA in standby mode, conserving energy. The AH-705 is designed for negative ground electric polarity, further enhancing its compatibility.

With impressive tuning accuracy, this tuner ensures a VSWR of less than 1:2.0 (excluding λ/2 antenna length and multiples). Please note that Icom does not supply the ‘Terminal connector’ at this time.

The AH-705 also offers 45 tuned memories, allowing you to quickly access your preferred settings. With dimensions of 190 × 105 × 40 mm and a weight of 450 g, this compact tuner is perfect for portable use.

In conclusion, the Icom AH-705 HF/50 MHz Automatic Antenna Tuner is a powerful and versatile tool for optimizing your radio performance. With its wide frequency range, multiple power source options, and user-friendly operation, this tuner is a must-have for any IC-705 user. Experience enhanced communication and maximize your radio’s potential with the AH-705.


  • Tunable Frequency Range: 1.8 – 54 MHz (with a 30 m, 98.4 ft or longer antenna), 3.5 – 54 MHz (with a 7 m, 23 ft or longer antenna)
  • Maximum Input Power: 10W
  • Input Impedance: 50Ω
  • Power Requirement for Tuning: 5W, 10W
  • Power Supply Requirement Battery: 3.0V DC (LR6 AA alkaline × 2 cells)
  • Power Supply Requirement DC Input: 13.8V DC (±15%)
  • Current Drain: Less than 300 mA (at tuning), less than 1 mA (stand-by)
  • Electric Polarity: Negative ground
  • Tuning Accuracy: Less than 1: 2.0 VSWR (except λ/2 of antenna length and its multiples)
  • Number of Tuned Memories: 45 memories
  • Dimensions: 190 x 105 x 40 mm
  • Weight: 450 g

Additional information

Weight 0.7 kg