• AH-4 Icom, automatic antenna tuner

The Icom AH-4 Automatic Antenna Calibrator is designed to work with some of ICOM's amateur radio HF transceivers. It provides reliable frequency matching from 3.5 to 54 MHz when using a cable that is at least 23 feet (7 m) in length. It can also be used to calibrate from 7 to 54 MHz when used with the optional ICOM AH-2b antenna element. The built-in 8-bit microprocessor selects the lower SWR condition from more than 1,040,000 different LC (coil / capacitance) combinations. LC combinations of 45 frequencies previously used are automatically memorized by the AH-4. Once a frequency is memorized, the AH-4 will tune this frequency in less than one second. (The memories are retained only when the power is turned on).

The AH-4 is sealed in a weatherproof plastic housing for convenient outdoor mounting under your antenna. The transceiver and AH-4 tuner must be grounded. Use a short gauge wire or a strap for this. This tuner can be attached to a pole using the two U-bolts provided, or on a flat surface (screws and bolts are provided). The AH-4 comes with a 16-foot (5m) control cable that connects to the rear panel of the compatible ICOM transceiver. A 16-foot (5 m) raw coaxial cable and two PL-259s are provided to connect the antenna output of the transceiver to the input of the AH-4 antenna. PL-259 must be welded by the user.

This calibrator requires about 10 watts (5-15 watts) to activate and can handle up to 120 watts. It operates on 13.8 VDC (less than 2 amps) from the transceiver control cable. Size: 7 x 2.9 x 9.2 inches 2.65 Lbs. (172 x 70 x 230 mm 1.2 kg).

Features Antenna Tuner Type: Automatic
Antenna Tuner Location: Remote
Weather-Resistant: Yes
Mobile Whip Tuner: Yes
Tuner Maximum Power Rating: 120 watts
Frequency Range: 3.5-54 MHz
Tuner Inductor Type: Automatic
Tuner Capacitors: Automatic
Tuner Bypass Switch: No
Tuner Control Type: Internal
Internal Dummy Load: No
Internal Balun Type: None
DC Power Required: Yes
Tuner Width: 6.781 in.
Tuner Height: 6.750 in.
Tuner Depth: 9.063 in.
Tuner Weight: 2.65 lbs.

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AH-4 Icom, automatic antenna tuner

  • Brand: Icom
  • Product Code: ICOM
  • Availability: In Stock
  • 614.59$


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