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Icom AT-140 Instruction Manual

Manual is about: HF automatic antenna tuner

Summary of AT-140

  • Page 1

    Hf automatic antenna tuner at-140 instruction manual.

  • Page 2

    Supplied accessories the following accessories are supplied with the at-140. I foreword thank you for purchasing the at-140 hf auto- matic antenna tuner. The at-140 is designed, primarily for use with icom hf transceivers. Refer to your hf transceiver instruction manual for operation. If you have an...

  • Page 3

    Ii miscellaneous items the following parts are additionally required for instal- lation, but are not supplied with the at-140. Purchase these parts locally. Q awg 14 × 4 conductor shielded cable • icom offers an optional opc-1147/n control cable . Length: 10 m (32.8 feet) w 50 Ω coaxial cable e two ...

  • Page 4: System Installation

    1 1 system installation * the at-140 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 antenna system 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 top an...

  • Page 6: Antenna System

    2 3 antenna system antenna for land operation ■ 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 longer 4 ...

  • Page 7: Coaxial Cable

    4 2 antenna system coaxial cable ■ insulate the lead-in cable of the at-140 antenna termi- nal 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 erroneous indications, ke...

  • Page 8: Installations

    2001 new 3 5 installations 2001 new 2001 new installation outline ■ 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 page 6, “pl-259 connector.” e mo...

  • Page 9: Pl-259 Connector

    2001 new 2001 new 6 3 installations pl-259 connector ■ q slide the coupling ring down. Strip the cable jacket and tin the shield. • tin the exposed braid and then pull out the jacket. Coupling 30 mm 10 mm (tin) w strip the cable as shown below. Tin the center conductor. 1–2 mm 10 mm tin e slide the ...

  • Page 10: Mounting

    7 control cable signals 3 7 mounting ■ caution: mount the at-140 in a horizontal posi- tion or in a vertical position with the antenna termi- nal up. Mounting on a mast/metal pole d using u-bolts u-bolt u-bolt plate flat washer (l) spring washer nut mast/ metal pole 32–60 mm; 1.3–2.4˝ flat washer (s...

  • Page 11: Control Cable Signals

    8 4 control cable signals 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 current detector outp...

  • Page 12: Transceiver Setting

    2001 new 2001 new 9 4 control cable signals 2001 new 2001 new transceiver setting ■ ic-m700 with serial number 2500 and below in the ic-m700, change the [tune] switch setting from the “1” position to the “2” position. Confirm that the [key] switch is in the “2” position. See the ic- m700 instruction...

  • Page 13: Specifications

    2001 new 5 10 unit description and specifications 2001 new 2001 new 10 specifications ■ unit description ■ frequency coverage: 1.6–30 mhz (with 7 m; 23.0 feet) or longer antenna element) • power supply requirement: 13.6 v dc (supplied from the hf transceiver) • current drain: maximum 2 a • operating...

  • Page 14: Installation Example

    6 11 installation example 2001 new 2001 new 11 2001 new 2001 new the following are antenna tuner and antenna installa- tion examples for a non-sail boat. They also explain both transmission and reception performance, for your reference. • descriptions antenna tuner vertical element horizontal elemen...

  • Page 15

    2001 new 2001 new 12 6 installation example rdanger: high voltage! Never touch the antenna element while tuning or transmitting. Antenna tuner location versus the strength of radiation from the same length of the d antenna element when the antenna tuner is installed on the deck with the same element...

  • Page 16

    1-1-32 kamiminami, hirano-ku, osaka 547-0003, japan a-6175h-1ex-t printed in japan © 2002–2013 icom inc. Printed on recycled paper with soy ink..