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Frequency coverage 2-24 MHz


  • Dimensions: 230(W) x 340(H) x 80(D) mm; 9.1(W) x 13.4(H) x 3.1(D) in (projections not included)
  • Weight: 2.7 kg; 6.0 lb
  • Usable Temperature Range: -30°C ~ +60°C
  • Rated Voltage: 13.6 V DC +/-15% (negative ground) (supplied from an Icom HF marine transceiver)
  • Current Drain (at 13.6 V DC): 2 A
  • Frequency Coverage: 2~24 MHz (with the antenna length 7 m (23 ft) or longer)
  • Input Impedance: 50 ohms (unbalanced)
  • Max. Input Power: 150 W (PEP)
  • Input Power During Tuning: 10 W
  • Auto Tuning Time: 1.5 sec. (returning for a memorized frequency), typically 2~3 sec. (when operating band has been changed)
  • Auto Tuning Accuracy: VSWR 2.0:1
  • Insertion Loss: 0.5 dB (with a 50 ohms load, after tuning)

Tune in your HF marine world.

Suitable for many vessels
The versatile AT-120 can be used with a variety of vessels, even smaller boats that cannot use a long antenna element. For example, the AT-120 will match a 7 m (23 ft) long wire antenna across 2~24 MHz.

Automatic tuning
No manual tuning is needed. Just push the [TUNE] switch on an Icom HF marine transceiver; the AT-120 adjusts the antenna and the transceiver to the minimum SWR in any frequency on an HF marine band. The AT-120 allows you to transmit with strong RF output power, and is perfect for maritime mobile operations.

Weather resistant
The AT-120 is housed in a durable, completely weather-resistant acrylic case with rubber gaskets. The antenna tuner can be conveniently installed both on the deck or in the cabin near the antenna element.

For Icom HF marine transceivers
Icom's sophisticated AT-120 easily matches Icom HF marine transceivers. The AT-120 easily interconnects with an Icom HF marine transceivers. The AT-120 easily interconnects with an Icom HF marine transceiver. AT-120 installation is simple. No adjustments are necessary so you never need to open the cover for maintenance. Just connect the control and antenna cables.

Quick tune up
The tune-up time is less than 3 sec. in any frequency on an HF marine band. In addition, the AT-120 has 8 convenient memories to store tuning information. The AT-120 remembers the setting of individual coils and capacitors after tune-up. Retuning for a memorized frequency takes about 1.5 sec. This function allows you quick trouble-free frequency changes.

Low power tune-up
The AT-120 emits very little output power (just 300 mW) during tuning. This feature eliminates the possibility of causing interference to other stations.

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