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ICOM AH-705 Automatic Antenna Tuner

ICOM AH-705 Automatic Antenna Tuner

Important
SAVE THESE INSTRUCTIONS— These instructions contain important operating instructions for the AH-705.

Features

  • IP54* dust protection and splash resistance construction
    • Only when the jack covers are attached.
  • You can use the AH-705 with AA (LR6) size alkaline batteries, or an external DC power source.
  • The AH-705 provides reliable matching from 1.8 MHz to 54 MHz, using a long wire element.

Disposal
The crossed-out wheeled-bin symbol on your product, literature, or packaging reminds you that in the European Union, all electrical and electronic products, batteries, and accumulators (rechargeable batteries) must be taken to designated collection locations at the end of their working life. Do not dispose of these products as unsorted municipal waste. Dispose of them according to the laws in your area.

About CE and DOC

Hereby, Icom Inc. declares that the versions of AH-705 which have the “CE” symbol on the product, comply with the essential requirements of the Radio Equipment Directive, 2014/53/EU,
and the restriction of the use of certain hazardous substances in electrical and electronic equipment Directive, 2011/65/EU. The full text of the EU declaration of conformity is available at the following internet address: https://www.icomjapan.com/support/

Explicit definitions

WORD DEFINITION
DANGER! Personal death, serious injury or an explosion may occur.
WARNING! Personal injury, fire hazard or electric shock may occur.
CAUTION Equipment damage may occur.
NOTE If disregarded, inconvenience only. No risk of personal injury, fire or electric shock.

Icom is not responsible for the destruction, damage to, or performance of any Icom or non-Icom equipment, if the malfunction is because of:

  • Force majeure, including, but not limited to, fires, earthquakes, storms, floods, lightning, other natural disasters, disturbances, riots, war, or radioactive contamination.
  • The use of Icom antenna tuners with any equipment that is not manufactured or approved by Icom.

Thank you for choosing this Icom product.
READ ALL INSTRUCTIONS carefully and completely before using this product.

Precautions

  • DANGER HIGH RF VOLTAGE! NEVER touch an antenna or antenna connector while transmitting or tuning. This could cause an electrical shock or burn.
  • DANGER HIGH RF VOLTAGE! NEVER install the antenna tuner at any place that person easily touch the antenna or antenna connector while transmitting or tuning. This could cause an electrical shock or burn.
  • WARNING! NEVER use the antenna tuner during a lightning storm. It may result in an electric shock, cause a fire or damage the tuner. Always disconnect the power source and antenna before a storm.
  • WARNING! NEVER touch the antenna tuner with wet hands. This may result in an electrical shock or damage the tuner.
  • WARNING! NEVER apply AC power to the [DC IN] jack on the antenna tuner. This could cause a fire or damage the tuner.
  • WARNING! NEVER apply more than 16 V DC to the [DC IN] jack on the antenna tuner. This could cause a fire or damage the tuner.
  • WARNING! NEVER reverse the DC power cable polarity. This could cause a fire or damage the antenna tuner.
  • WARNING! NEVER let metal, wire or other objects contact the inside of the antenna tuner, or make incorrect contact with connectors. This could cause an electric shock or damage the tuner.
  • WARNING! NEVER operate the antenna tuner without a solid ground. Always connect the ground wire to the ground terminal.
  • CAUTION: DO NOT transmit or tune without an antenna connected. This could cause damage to the antenna tuner.
  • CAUTION: DO NOT put the antenna tuner in any unstable place, such as on a slanted surface or a place that vibrates. This may cause an injury and/or damage the tuner.
  • CAUTION: DO NOT use harsh solvents such as Benzine or alcohol to clean the antenna tuner, as they can damage the tuner’s surfaces. If the tuner becomes dusty or dirty, wipe it clean with a dry, soft cloth.
  • KEEP the antenna tuner away from heavy rain, and never immerse it in water. The tuner meets IP54* requirements for dust-protection and splash resistance. However, once the tuner has been dropped, dust-protection and splash resistance cannot be guaranteed because of possible damage to the tuner’s case or the waterproof seal.
    • Only when the jack covers are attached.
  • DO NOT place or leave the antenna tuner in excessively dusty environments.
Battery cautions

DANGER! NEVER incinerate used battery cells since the internal battery gas may cause them to rupture.
CAUTION: Remove the alkaline batteries when the antenna tuner will not be used for a long period of time. Otherwise, the installed alkaline batteries may leak and damage the tuner.
When installing batteries, confirm that they are all the same brand, type and capacity. DO NOT mix new and old batteries together.
DO NOT use batteries whose insulated covering is damaged.
Icom, Icom Inc. and the Icom logo are registered trademarks of Icom Incorporated (Japan) in Japan, the United States, the United Kingdom, Germany, France, Spain, Russia, Australia, New Zealand, and/or other countries.

Supplied accessories

Supplied accessories

L Alkaline batteries, a strap or cord for mounting, and a power cable are not supplied.

Options

  • OPC-2474 control cable Cable length: 5 m (16.4 ft)
  • OPC-2475 coaxial cable Cable length: 5 m (16.4 ft)

About power supply

Using the alkaline batteries
The AH-705 uses two AA (LR6) size alkaline batteries.

  1. Use a coin or standard screwdriver (1), and turn the screw clockwise one quarter turn (2).Using the alkaline batteries
  2. Open the battery cover, and Install two AA (LR6) size alkaline batteries.
    • Install only alkaline batteries.
    • BE SURE to observe the correct polarity.Using the alkaline batteries 1
  3. Securely attach the battery cover.

Using the alkaline batteries 2

NOTE:

  • Disconnect the control cable from the antenna tuner when the tuner will not be used for some time. Otherwise, the installed alkaline batteries will become exhausted.
  • When the batteries are almost exhausted, the antenna tuner is automatically turned OFF. Replace all batteries with new alkaline batteries.

Using an external DC power source

WARNING! NEVER reverse the DC power cable polarity.

  1. Build a power cable for the external DC power source.Using an external DC power source
  2. Connect the antenna tuner to an external DC power source.
    LLConfirm that the external DC power source is OFF before connecting the DC power cable.

Using an external DC power source 1

Connection

Connection

NOTE: The antenna tuner must have an adequate ground connection. Otherwise, the overall efficiency of the transceiver and antenna tuner installation will be reduced. Interference, RF feedback, and electrical shocks from other equipment could also occur.

For best results, connect a heavy gauge wire or strap to a long ground rod. Make the distance between the [GND] terminal and ground as short as possible.
A long wire connected to the [GND] terminal can be used as a counterpoise.

Installation

Install the antenna tuner on a pole, as shown below.

  1. Attach the supplied bracket to the back of the antenna tuner, by using a coin or standard screwdriver.Installation
  2. Thread the strap through the bracket slots.Installation 1
  3. Mount the antenna tuner on a pole.

Installation 2

NOTE:

  • Keep the antenna tuner as far away from the transceiver as possible.
  • DO NOT expose the tuner to rain, snow, or any liquids, when the jack covers are detached. Dust-protection and splash resistance cannot be guaranteed.
  • Using the tuner with a Loop antenna that is not suitable for the operating frequency cannot be guaranteed.

Documents / Resources

ICOM AH-705 Automatic Antenna Tuner [pdf] Instruction Manual
AH-705, Automatic Antenna Tuner

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