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' Icom At 140'



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INSTRUCTION MANUAL




  HF AUTOMATIC
  ANTENNA TUNER

  AT-140
    FOREWORD                                                       PRECAUTIONS
    Thank you for purchasing the AT-140 HF AUTO-                   R DANGER HIGH VOLTAGE! NEVER touch
    MATIC ANTENNA TUNER.                                           the antenna terminal, ground terminal, antenna or
                                                                   counterpoise while transmitting. Place the AT-140, an-
    The AT-140 is designed, primarily for use with Icom HF         tenna and counterpoise in positions where no one can
    transceivers.                                                  touch them.

    Refer to your HF transceiver instruction manual for op-        NEVER use without a ground connection.
    eration. If you have any questions, contact your dealer.
                                                                   NEVER transmit during internal adjustment. This may
                                                                   cause an electric shock.
    IMPORTANT                                                      USE the ground terminal for ground connection.
                                                                   The mounting plate is not connected internally.
    READ ALL INSTRUCTIONS carefully and com-
    pletely before using the AT-140.

    SAVE THIS INSTRUCTION MANUAL. This in-
    struction manual contains important safety and instal-           Ground terminal
    lation instructions.


    EXPLICIT DEFINITIONS
                                                                             Mounting plate
        Word                       Definition
              Personal injury, fire hazard or electric
    R WARNING
              shock may occur.                                     DO NOT operate your HF marine transceiver without
      CAUTION       Equipment damage may occur.                    running the boat's engine.
                    If disregarded, inconvenience only. No         AVOID using the AT-140 in areas where the temper-
        NOTE        personal injury, fire hazard or electric       ature is below ­30°C (­22°F) or above +60°C
                    shock.                                         (+140°F).




    SUPPLIED ACCESSORIES
    The following accessories are supplied with the AT-140.                                                                     Qty.
                                                                   q U-bolts ...................................................... 2
                                                                   w U-bolt plates ............................................. 2
          q                                             u          e Flat washers (M6 large) .............................. 8
                                                                   r Flat washers (M6 small) .............................. 4
          w                                                        t Spring washers (M6) .................................... 8
                                                        i          y Nuts (M6) ................................................... 8
                                                                   u Hex head bolts (M6×50) .............................. 4
          e
                                                    o              i Self-tapping screws (A0 6×30) ........................ 4
                                          !0       !1
                                                                   o Weatherproof cap ....................................... 1
          r                                                        !0 4-pin/6-pin connector* ................................. 1
          t                                                        !1 Connector pins* .......................................... 4
          y                                                        !2 Ground cable (OPC-412) .............................. 1

                                     !2                            *The supplied connector and pins are differ according to ver-
                                                                    sion.


    Icom, Icom Inc. and the    are registered trademarks of Icom Incorporated (Japan) in the United States, the United King-
    dom, Germany, France, Spain, Russia and/or other countries.
i
MISCELLANEOUS ITEMS                                         TABLE OF CONTENTS
The following parts are additionally required for instal-   FOREWORD ................................................... i
lation, but are not supplied with the AT-140.
                                                            IMPORTANT ................................................... i
Purchase these parts locally.
                                                            EXPLICIT DEFINITIONS .................................... i
q AWG 14×4-conductor shielded cable
   *Icom offers an optional OPC-1147/N CONTROL CABLE.       PRECAUTIONS ............................................. i
    Length: 10 m; 32.8 feet                                 SUPPLIED ACCESSORIES .............................. i
w 50  coaxial cable
e PL-259 connectors                                         MISCELLANEOUS ITEMS .............................. ii
                                                            FEATURES ................................................... ii
                                                            TABLE OF CONTENTS .................................... ii
FEATURES
                                                            1 ANTENNA SYSTEM ................................. 1­2
Matches all bands                                             I Antenna for ship ....................................... 1
The AT-140 matches any frequency on every HF ma-              I Antenna for land operation ........................... 1
rine band. For example, the tuner matches a 7 m; 23 ft        I Coaxial cable .......................................... 2
long-wire antenna across 1.6­30 MHz.                          I Ground and counterpoise ........................... 2

Full automatic tuning                                       2 INSTALLATIONS ....................................... 3­5
Just push the [TUNE] switch on the transceiver, and            I lnstallation outline....................................... 3
the AT-140 adjusts immediately to the minimum SWR              I Control cable ............................................. 3
of any frequency on any HF marine band.                        I PL-259 connector ....................................... 4
                                                               I Mounting ................................................ 4
HF operation on any size ship                                  I Cable connections .................................... 5
The AT-140 allows you HF operation where antenna
element length is restricted due to space.                  3 CONTROL CABLE SIGNALS ..................... 6­7
                                                              I Terminal information ................................. 6
Weather resistant                                             I Transceiver setting .................................... 7
The AT-140 is housed in a durable, completely weather
resistant ASA case with a rubber gasket. The antenna        4 UNIT DESCRIPTION AND SPECIFICATIONS
tuner can be conveniently installed both on the deck or       .................................................................. 8
in the cabin near the antenna element.                        I Unit description .......................................... 8
                                                              I Specifications .......................................... 8
Simple installation
Installation is simple. Just connect the control and an-
tenna cables. You never need to open the cover.
45 memories for shorter tuning time
To decrease the tune-up time, the AT-140 automatically
stores the matching conditions for up to 45 frequencies.
Re-tuning for a memorized frequency takes approx. 1
sec.
Super capacitor for memory backup
Even if the AT-140 is not used for approx. 1 week, the
built-in super capacitor backs up contents of the 45
memories.
Low power tune up
The AT-140 emits low output power during tuning. This
feature reduces the possibility of causing interference
to other stations.
Tuner through function
The tuner through function is built into the AT-140. This
function helps improve receiver gain, depending on the
antenna element length used, and operating fre-
quency.


                                                                                                                                     ii
     1              ANTENNA SYSTEM

    I Antenna for ship
    Required antenna element length
    Required antenna element length to achieve full per-
    formance varies according to the lowest frequency:                              Insulator

     The lowest frequency Required antenna element length
                                                             Backstay operates as
     1.6 MHz band           7 m; 23.0 feet or longer         a long-wire antenna.
     4 MHz band             3 m; 9.8 feet or longer

    The longer the antenna element, the better the an-
    tenna efficiency.

    Undesirable antenna element lengths                         Insulator
    AVOID multiples of 1/2 (half wavelength) for an-
    tenna element lengths, since tuning becomes difficult.
    L : Antenna element length to be avoided [m]
    f : Operating frequency [MHz]
    n : Natural number (n = 1, 2, 3, ...)

         300   1
    L=       ×   × n
          f    2
                                                                                                  Whip antenna
    [Example]
    At an operating frequency of 16 MHz, avoid the fol-
    lowing antenna element lengths:
         300   1
    L=       ×   × n       9.4, 18.8, ...
         16    2
    1m     39 inches

    For example, if 15 m is selected for an antenna ele-
    ment length, you have no problem in the 1.6­25 MHz       NOTE: Keep antennas as far away from other objects
    marine bands range.                                      as possible, especially metal objects.



    I Antenna for land operation
    In some countries, HF transceivers can be used for       Refer to the AH-2b instruction manual for the AH-2b
    land mobile operation. Ask your Icom Dealer for de-      and AT-140 installation to your vehicle. Ask your Icom
    tails, since the radio law varies according to each      Dealer for details.
    country.
                                                             Connect a suitable antenna element for a base sta-
    For land mobile operation on 4 MHz and above, an         tion. To achieve full performance, refer to "Required
    optional AH-2b ANTENNA ELEMENT is available.             antenna element length" above.
    The AH-2b includes a sturdy tow hook mount system
    for holding a 2.5 m; 8.2 feet stainless steel antenna
    element plus all the necessary hardware.



                                            AH-2b




1
                                                                                          ANTENNA SYSTEM            1


I Coaxial cable
Insulate the lead-in cable of the AT-140 antenna ter-     To prevent erroneous indications, keep cables as far
minal and antenna element from other metal objects.       away as possible from the flux gate compass.

To prevent interference, keep cables as far as possi-     Use suitable noise filters for alternators, fluorescent
ble from an antenna, electric pump and other elec-        lights, etc. Ask your Dealer for details.
tronic equipment.



I Ground and counterpoise
Why a ship's ground is required                           Counterpoise
The AT-140's ground terminal MUST be connected            If your ship is made of FRP, etc. and a good ship's
to your ship's ground. Grounding prevents electric        ground is not available, connect a counterpoise.
shocks, interference to other equipment and other
                                                                  1/4radial for
problems. Grounding also ensures effective signal
                                                                  each band
transmission.
                                                                                    Ground terminal
DANGER! NEVER connect the ground terminal to
the following points. These connections may cause
an explosion or electric shocks:
­ Gas or electrical pipe
­ Fuel tank or oil-catch pan
                                                                                        AT-140
IMPORTANT! The mounting plate is NOT con-                 1/4 (quarter wavelength) radial for each band is suit-
nected to the AT-140's internal ground.                   able for a counterpoise. Install the counterpoise di-
Ideal ground points                                       rectly below the AT-140's ground terminal. Insulate
One of following points is ideal:                         the ends of each radial from other metal objects. Lay-
­ External ground plate                                   out the radial horizontally and as straight as possible.
­ External copper screen                                  L : Counterpoise length for the operating frequency [m]
­ External copper foil                                    f : Operating frequency [MHz]
Good ground points                                              300   1
If electrically connected to sea water, one of the fol-   L=        ×
                                                                 f    4
lowing points is usable:
­ Stainless steel stanchion                               [Example]
­ Through mast                                            At an operating frequency of 16 MHz, use a counter-
­ Through hull                                            poise with the following length:
­ Metal water tank                                              300   1
                                                          L=        ×         4.7 [m]
Undesirable ground points                                       16    4
AVOID the following points, if possible. These con-       1m      39 inches
nections may cause noise or electrolysis:
­ Engine block                                            Ground cable
­ Ship's DC battery ground                                For best results, use the heaviest gauge wire or metal
                                                          strap available. Make the distance between the AT-
Electrolysis                                              140's ground terminal and ship's ground as short as
All ground cables from the AT-140, HF transceiver,
                                                          possible.
etc. on your ship should be connected to only 1 ship's
ground.                                                   Supplied ground cable can be used for ground con-
AVOID connection to 2 or more points. Voltage dif-        nection to a through mast. Confirm that the through
ference between 2 or more ship's grounds may cause        mast is electrically connected to sea water.
electrolysis.
                                                           R WARNING!-- When grounding to metal hull
AVOID connection between dissimilar metals where           Use a Zinc anode to protect the hull from electroly-
an electric current is present. These connections may      sis.
cause electrolysis.
                                                           Ask your technical dealer, installer or refer to a tech-
                                                           nical book, etc., for RF ground details.

                                                                                                                        2
     2                INSTALLATIONS

    I Installation outline
    q Connect a control cable and 4-conductor shielded                 r Connect the control cable and the coaxial between
      cable.                                                             the transceiver and the AT-140.
       · Refer to "Control cable" below.                                   · Refer to p. 5 "Cable connections."

    w Connect and solder the PL-259 connector to the                   t Connect an antenna, ship's ground or counter-
      coaxial cable.                                                     poise.
       · Refer to p. 4 "PL-259 connector."                                 · Refer to p. 1 "Antenna for ship" and p. 2 "Ground and
                                                                             counterpoise."
    e Mount the AT-140 in the desired location.
       · Refer to p. 4 "Mounting."




    I Control cable
    Between the AT-140 and HF marine transceiver, con-                 OPC-566   : for IC-M710/RT, M700PRO
    nect 4 control signal lines as shown below. To prevent             OPC-1147/N: for IC-M802
    RF feedback, use a 4-conductor shielded cable. Con-
    nect the shield line to the [GND] terminal on the trans-           Refer to p. 6 "Terminal information" for details.
    ceiver. Icom offers 10 m (32.8 ft) long optional control
    cables as at right.
    D When connecting to Icom IC-M802
                                                                                      To AT-140
                            To transceiver   Use the optional OPC-1147/N, or
                                             assemble the desired length 4-
                                             conductor shielded cable and the
                                             connector kits supplied with the
       [E]      :   Black                    transceiver and the tuner.                                [E]      :   Black
       [13.6]   :   Red                                                                                [13.6]   :   Red
       [STAR]   :   White                                                                              [STAR]   :   White
       [KEY]    :   Green                                                                              [KEY]    :   Green

                                              [GND]                     [GND]           OPC-1147                      OPC-1147N

    D When connecting to Icom IC-M710/RT, IC-M700PRO
                                             Use the optional OPC-566/1147/N
                                             (either the connector to the AT-140      To AT-140
                                             or the transceiver requires assem-
                            To transceiver   bly), or assemble the desired length
       [STAR] : White
                                             4-conductor shielded cable and the
       [KEY] : Green                         connector kits supplied with the
                                             transceiver and the tuner.                                [E]      :   Black
                                                                                                       [13.6]   :   Red
                                                                                                       [STAR]   :   White
                                                                                                       [KEY]    :   Green
       [13.6]   : Red                             [GND]
       [E]      : Black
                                                                        [GND]           OPC-1147                      OPC-1147N


    D When connecting to Icom IC-M700/TY, IC-78
                                             Use the optional OPC-1147/N (this        To AT-140
                                             connector only requires assembly),
                                             or assemble the desired length 4-
                            To transceiver   conductor shielded cable and the
                                             connector kits supplied with the
       [E]      :   Black                    transceiver and the tuner.                                [E]      :   Black
       [13.6]   :   Red                                                                                [13.6]   :   Red
       [STAR]   :   White                                                                              [STAR]   :   White
       [KEY]    :   Green                                                                              [KEY]    :   Green
                                              [GND]                     [GND]
                                                                                        OPC-1147                      OPC-1147N

3
                                                                                                           INSTALLATIONS                2


I PL-259 connector
q Slide the coupling ring over the coaxial cable. Strip                 e Slide the connector body over the cable and sol-
  the cable jacket and pull back to reveal 10 mm of                       der as shown below.
  braid.
                                                                                                   Solder Solder
   · Soft solder the exposed braid and then pull out the jacket.
           Coupling               30 mm
                                                                        r Screw the coupling ring onto the connector body.

                                  10 mm (soft solder)
w Strip the cable as shown below. Soft solder the cen-
  ter conductor the entire length of the exposed braid.
                                   1­2 mm
                          10 mm          soft solder

        10 mm      3/8   inches




I Mounting
Attach the AT-140 either horizontally or vertically with                Mounting on a flat surface
one of the water drains facing downwards. After                                Using nuts and bolts                Using self-tapping
mounting, remove the screw in the water drain.                                                                     screws

Mounting on a Mast/Metal pole
                     Mast/       Using       U-bolts
                     Metal pole
                               U-bolt

                              U-bolt plate

                                                       Flat washer(L)
                                                   Spring washer
                                                       Flat washer(S)
                                                       Nut
                                                                        Nut
                                                                        Flat
                                                                        washer(S)
                                                                        Spring
                                                                        washer
                                                                        Flat
                                                                        washer(L)



WARNING: Mount the AT-140 securely with the
supplied nuts and bolts. Otherwise, vibrations and                      Flat
                                                                        washer(L)                         Weatherproof cap
shocks due to waves, etc. could loosen the antenna                      Hex head           Drill a hole here
                                                                        bolt               Diameter:7­8 mm; 9/32­5/16 inches
tuner making if fall, causing personal injury.




                                                                                                                                            4
    2     INSTALLATIONS




    I Cable connections
    q Connect the coaxial cable and the control cable to            r Connect the coaxial cable and the control cable to
      the AT-140 as illustrated below.                                the transceiver as illustrated below.
    w Cover both the antenna and the control cable con-             t Ground the transceiver, AT-140 and shield cable of
      nectors with rubber vulcanizing tape and fix it with            the control cable via the ground terminal.
      a vinyl tape to prevent water seeping into the con-              · See pgs. 2 and 7­10 for grounding details.
      nector.
                                                                          IMPORTANT!-- AT-140
                                                                          NEVER ground the AT140 via the mounting
                                                                          plate. It is not connected to ground internally.


                                Rubber vulcanizing tape

                                                                           Ground terminal




    e Fix both of the coaxial and control cables to pro-                          Mounting plate
      tect the inside connections.
         DO NOT pull the antenna and control cable re-
         ceptacles. This may cause disconnection (in the
         AT-140), internal connector damaged or bad
         connection.

                                                             Icom HF transceiver
                              AT-140




                                                                    Ground
                                                                                    2.8 ft)
                                                                          N (10 m; 3
                                                               P C -1147/
                               Ground                        O




5
                                                 CONTROL CABLE SIGNALS                                                      3
I Terminal information
Consider the following points when using a non-Icom       Start voltage [STAR]
transceiver.                                              When a start voltage (less than 1 V) is received, the
 Terminal                   Description                   AT-140 begins automatic tuning.
  [KEY]     Key voltage. Grounded during tuning.                                      More than
                                                                                      350 msec.*
            Max. current drain 100 mA.                       Start
                                                             voltage 8                                   Approx. 7.5 V
  [13.6]    13.6 V DC + input terminal.                      [V]
            Max. current drain 2 A                                   6
                                                                    4
  [STAR]    Receives start voltage.
                                                                    2                                   Less than 1 V to
            Max. current drain 1 mA                                                                     start tuning
                                                                     0
    [E]     Ground terminal for above signals.                                                                             Time
                                                                         *For tuner through operation; Less than 250 msec.



                                                          Key voltage [KEY]
                                                          During automatic tuning, the AT-140 grounds the key
                                                          voltage line, and the HF transceiver reduces output
                                                          power.
                                                                                            During automatic tuning

                                                             Key
                                                             voltage 8   Approx. 7.5 V
                                                             [V]
                                                                     6
                               [KEY]
                                                                    4
                               [STAR]
                               [13.6]                               2
                               [E]                                   0
                                                                                                    Grounded               Time

                            *Connector shape may differ
                             according to version.

                                                          If the key voltage is more than 8 V, switch the mode
                                                          switch (S1) to OFF mode (lower position).


                                                                                                   S1

                                                                    NORMAL mode
                                                                    OFF mode
                                                 [E]
                                                 [13.6]
                                                 [STAR]
                                                 [KEY]



Mode switch (S1)




                                                                                                                                  6
    3     CONTROL CABLE SIGNALS




    I Transceiver setting
    IC-M700 with serial number 2500 and below                   IC-M710/RT, IC-M700PRO
    In the IC-M700, change the [TUNE] switch setting            In the IC-M710/RT and IC-M700PRO, select the an-
    from the "1" position to the "2" position. Confirm that     tenna tuner type as "AH-3*" in initial set mode. See
    the [KEY] switch is in the "2" position. Refer to the IC-   IC-M710/RT instruction manual p. 13 or IC-M700PRO
    M700 instruction manual p. 9 for details.                   instruction manual p. 11 for details.
                   [KEY] [TUNE]
                                                                IC-M802
                                                                In the IC-M802, select the antenna tuner type as "AT-
                                  Confirm "2" position.
                                                                140" in initial set mode. See IC-M802 instruction man-
              Select "2" position.                              ual p. 49 for details.

                                                                Non-Icom HF transceiver
    Other IC-M700 and IC-M700TY
                                                                Select correct settings for the start voltage and key
    Nothing necessary to set. However, the tuner through
                                                                voltage. Refer to your HF transceiver instruction man-
    function is not available when using the AT-140 with
                                                                ual for details.
    IC-M700/TY.

    IC-78                                                         NOTE: When a non-Icom automatic tuner was pre-
    In the IC-78, select the antenna tuner type as "4* (AH-       viously used, confirm the tuner settings. Refer to
    4)" in initial set mode. See IC-78 instruction manual         the instruction manual for details.
    p. 32 for details.
                                                                *With "AT-130" setting, use of the AT-140 is possible, how-
                                                                 ever, the tuner through function cannot be operated.




7
               UNIT DESCRIPTION AND SPECIFICATIONS                                                                        4
I Unit description

                                          340 mm; 13.4 in



                                                                          in
                                                              230 mm; 9.1



                                                                                               80 mm; 3.1 in



                               Ground terminal
                                                                                               Mounting plate


                               Water drain screw

                               Antenna cable receptacle                                        Control cable receptacle




                               Antenna terminal


                               Mounting plate


                                                91.5 mm; 3.6 in




I Specifications
  · Frequency coverage                                   : 1.6­30 MHz (with 7 m; 23.0 feet or longer antenna element)
  · Power supply requirement                             : 13.6 V DC (supplied from HF transceiver)
  · Current drain                                        : Max. 2 A
  · Operating temperature range                          : ­30°C to +60°C (­22°F to +140°F)
  · Weight                                               : 2.5 kg; 5.5 lb
  · Antenna connector                                    : SO-239 (50 )
  · Max. Input power                                     : 150 W (PEP) 100 W (continuous)
  · Automatic tuning time                                : Approx. 2­3 sec. (general condition) Max. 15 sec.
                                                           Approx. 1 sec. (re-tuning for a memorized frequency)
  · Automatic tuning accuracy                            : SWR 2.0:1 (after tuning, except for multiples of 1/2 )



  All stated specifications are subject to change without notice or obligation.

                                                                                                                              8
                        Icom America Inc.                                         Icom (Europe) GmbH
                        
                                                                                  Communication Equipment
                        2380 116th Avenue N.E., Bellevue, WA 98004, U.S.A.
                                                                                  Himmelgeister Str. 100,
                        Phone: +1 (425) 454-8155 Fax: +1 (425) 454-1509
                                                                                  D-40255 Düsseldorf, Germany
                        URL: http//www.icomamerica.com
                                                                                  Phone: +49 0211 346047 Fax: +49 0211 333639
                        E-mail: sales@icomamerica.com
                                                                                  URL: http//www.icomeurope.com
                        
                                                                                  E-mail: info@icomeurope.com
                        Phone: (425) 454-7619

                        Icom Canada                                               Icom Spain S.L.
                        Glenwood Centre #150-6165 Highway 17, Delta,              Crta. de Gracia a Manresa Km. 14,750 08190 Sant
                        B.C., V4K 5B8, Canada                                     Cugat del Valles Barcelona, SPAIN
                        Phone: +1 (604) 952-4266 Fax: +1 (604) 952-0090           Phone: +34 (93) 590 26 70 Fax: +34 (93) 589 04 46
                        URL: http//www.icomcanada.com                             URL: http//www.icomspain.com
                        E-mail: info@icomcanada.com                               E-mail: icom@icomspain.com



                        Icom (Australia) Pty. Ltd.                                Icom (UK) Ltd.
                        A.B.N. 88 006 092 575                                     Unit 9, Sea St., Herne Bay, Kent, CT6 8LD, U.K.
                        290­294 Albert Street, Brunswick, Victoria, 3056,         Phone: +44 01227 741741 Fax: +44 01227 741742
                        Australia                                                 URL: http//www.icomuk.co.uk
                        Phone: +61 (03) 9387 0666 Fax: +61 (03) 9387 0022         E-mail: info@icomuk.co.uk
                        URL: http//www.icom.net.au
                        E-mail: sales@icom.net.au


                        Icom New Zealand                                          Icom France S.a
                        146A Harris Road, East Tamaki, Auckland, New Zealand      Zac de la Plaine, 1, Rue Brindejonc des Moulinais
                        Phone: +64 09 274 4062 Fax: +64 09 274 4708               BP 5804, 31505 Toulouse Cedex, France
                        URL: http//www.icom.co.nz                                 Phone: +33 (5) 61 36 03 03 Fax: +33 (5) 61 36 03 00
                        E-mail: inquiries@icom.co.nz                              URL: http://www.icom-france.com
                                                                                  E-mail: icom@icom-france.com



                        Asia Icom Inc.                                            Icom Polska
                        6F No. 68, Sec. 1 Cheng-Teh Road, Taipei, Taiwan R.O.C.   Sopot, 3 Maja 54 Poland
                        Phone: +886 (02) 2559 1899 Fax: +886 (02) 2559 1874       Phone: +48 (58) 550 7135 Fax: +48 (58) 551 0484
                        URL: http//www.asia-icom.com                              E-mail: icompolska@icompolska.com.pl
                        E-mail: sales@asia-icom.com


                        Beijing Icom Ltd.
                        1305, Wanshang Plaza, Shijingshan Road, Beijing
                        China
                        Phone: +86 (010) 6866 6337 Fax: +86 (010) 6866 3553
                        E-mail: bjicom@bjicom.com




A-6175H-1EX-q
Printed in Japan
© 2002­2004 Icom Inc.   1-1-32 Kamiminami, Hirano-ku, Osaka 547-0003, Japan


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