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Automatic Antenna Tuner KAT-130


Automatic Antenna Tuner

Suitable for varies vessels
The versatile KAT-130 can be used with a variety of vessels, even smaller boats that cannot use a long antenna element

Automatic tuning
No manual tuning is needed. Just push the [TUNE] switch on HF marine transceiver; the KAT-130 adjusts the antenna and the Transceiver to the minimum SWR in any frequency on an HF marine band. The KAT-130 allows you to transmit with strong RF output power, and is perfect for maritime mobile operations.

Whether resistant
The KAT-130 is housed in a durable, completely weather-resistant acrylic case with rubber gaskets. This allows it to be conveniently installed near the antenna element base.

For varies HF marine transceivers
Onwa’s sophisticated KAT-130 easily matches varies HF marine transceivers such as Icom, Kenwood etc. KAT-130 installation is simple. No adjustments are necessary. Just connect the control cable and antenna wire and go!

Quick tune-up
Improved tuning performance… the tune-up time is less than 15 seconds in any frequency on an HF marine band. In addition, the KAT-130 has 40 convenient memories to store tuning information. Retuning for a memorixed frequency takes about 1.5 seconds. This allows you quick trouble-free frequency changes.

Low power tune-up
The KAT-130 emits very little output power(just 300 mW) during the tuning process. This reduces the possibility of causing interference to other stations uisng the frequency.

  • 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: 2.5 kg; 5.5lb
  • Usable Temperature Range: -30 o C ~ +60 o C
  • Rated Voltage: 13.6 V DC +/-15% (negative ground) (supplied from an HF marine transceiver)
  • Current Drain (at 13.6 V DC): 2 A
  • Frequency Coverage: 1.6~30 MHz

    Lowest Frequency in use

    Length of antenna


    12 meters or longer


    3 meters or longer


    2 meters 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)

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