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Icom AT-141 Instruction Manual

Other manuals for AT-141: Instruction Manual
Manual is about: HF AUTOMATIC ANTENNA TUNER

Summary of AT-141

  • Page 1

    Hf automatic antenna tuner at-141 instruction manual.

  • Page 2

    I foreword thank you for purchasing the at-141 hf auto- matic antenna tuner. The at-141 is designed, primarily for use with icom hf transceivers. Refer to your hf transceiver instruction manual for operation. If you have any questions, contact your dealer. Important read all instructions carefully a...

  • Page 3

    Ii miscellaneous items the following parts are additionally required for instal- lation, but are not supplied with the at-141. Purchase these parts locally. Q awg 14 × 4 conductor shielded cable • icom offers an optional opc-1465 control cable. Length: 10 m w 50 Ω coaxial cable e two pl-259 connecto...

  • Page 4: System Installation

    1 1 system installation * the at-141 is housed in a durable, completely weather resistant case. You don’t have to worry a lot about rain, splash, and so on. Five critical points for a successful hf installation ■ these critical points apply to almost any hf installa- tion, whether it is for a base s...

  • Page 5: Antenna and Tuners

    2 1 system installation antenna and tuners ■ if your icom hf system is going aboard a sailboat, you may use an insulated backstay to make up your antenna system. Your best range will be from an in- sulated backstay because of the long length of the antenna element which is that portion between the t...

  • Page 6: Antenna System

    2 3 antenna system 2001 new 2001 new 3 2001 new 2001 new antenna for ship ■ required antenna element length d required antenna element length to achieve full per- formance varies, according to the lowest frequency. The lowest frequency required antenna element length 1.6 mhz band 7 m; 23.0 feet or l...

  • Page 7: Coaxial Cable

    2001 new 2001 new 4 2 antenna system coaxial cable ■ insulate the lead-in cable of the at-141 antenna ter- minal and antenna element from other metal objects. To prevent interference, keep cables as far as pos- sible from an antenna, electric pump and other elec- tronic equipment. To prevent erroneo...

  • Page 8: Installations

    3 5 installations 2001 new 2001 new 5 2001 new 2001 new q connect the pins to the control cable and insert into the supplied connector. • refer to “control cable” as described below. W connect and solder the pl-259 connector to the coaxial cable. Refer to “pl-259 connector” as described below. E mou...

  • Page 9: Mounting

    2001 new 2001 new 6 3 installations waterproofing the antenna connection ■ q cut off just the top of the weatherproof cap, and pass the antenna wire through the cap. Antenna wire weatherproof cap w insert the antenna wire into the opening of the crimp-on wire terminal. • crimp or solder the antenna ...

  • Page 10: Cable Connections

    2001 new 7 3 installations 2001 new 2001 new 7 cable connections ■ q connect the coaxial cable and the control cable to the at-141, as shown below. W wrap both the antenna and the control cable con- nectors with rubber vulcanizing tape, and then wrap electrical tape* over the rubber vulcanizing tape...

  • Page 11: Control Cable Signals

    2001 new 2001 new 4 8 control cable signals 8 terminal information ■ terminal description [key] key voltage. Grounded during tuning. Maximum current drain 100 ma [13.6] 13.6 v dc + input terminal. Maximum current drain 2 a [star] receives start voltage. Maximum current drain 1 ma [antc] antenna curr...

  • Page 12: Unit Description

    5 9 unit description and specifications 2001 new 9 antenna terminal mounting plate control cable connector antenna connector mounting plate ground terminal 340 mm 230 mm 80 mm 91.5 mm unit description ■ specifications ■ frequency coverage : 1.6–30 mhz (with 7 m or longer antenna element) • power sup...

  • Page 13: Installation Example

    6 10 installation example style of the antenna element d when the horizontal element is longer, or made with multiple wires, the effective height of the antenna is high and communication distance may be improved. Good — vertical this is a basic style with only the verti- cal element. This style is n...

  • Page 14

    Good — horizontal the antenna tuner is installed at a higher position and the element is in- stalled horizontally. Better — inverted-l the element is bent in the middle as an inverted-l antenna. Best — vertical if the length of the antenna element is limited because of installation space, a longer v...

  • Page 15

    2001 new 12 6 installation example thickness of the antenna element versus the strength of radiation from the element d the thickness of the antenna element does not change communication quality much, but it should be as thick as possible for better radiation from the antenna element. Good — regular...

  • Page 16

    1-1-32 kamiminami, hirano-ku, osaka 547-0003, japan a-6472h-1eu-r printed in japan © 2005–2013 icom inc. Printed on recycled paper with soy ink..