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INSTRUCTION MANUAL
HF AUTOMATIC
ANTENNA TUNER
AT-140
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FOREWORD PRECAUTIONS RDANGER HIGH VOLTAGE! NEVER touch Thank you for purchasing the AT-140 HF AUTO- the antenna terminal, ground terminal, antenna or MATIC ANTENNA TUNER. counterpoise while transmitting. Place the AT-140, an- tenna and counterpoise in positions where no one can The AT-140 is designed, primarily for use with Icom HF touch them. transceivers. Refer to your HF transceiver instruction manual for op- NEVER use without a ground connection. eration. If you have any questions, contact
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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 PRECAUTIONS ……………………………………… i *Icom offers an optional OPC-1147 CONTROL CABLE. Length: 10 m; 32.8 feet SUPPLIED ACCESSORIES ………………………… i w 50 Ω coaxial cable MISCELLANEOUS ITEMS ………………………… ii e PL
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1 ANTENNA SYSTEM Antenna for ship Required antenna element length Required antenna element length to achieve full per- Insulator formance varies according to the lowest frequency: 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 1 AVOID multiples of ⁄2λ (half wa
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ANTENNA SYSTEM 1 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. Ground and counterpoise Why a ship’s grou
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2 INSTALLATIONS 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.” t Connect an antenna, ship’s ground or counter- w Connect and solder the PL-259 connector to the poise. coaxial cable. • Refer to p. 1 “Antenna for ship” and p. 2 “Ground and • Refer to p. 4 “PL-259 connector.” counterpoise.” e Mount the AT-140 in
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INSTALLATIONS 2 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. 1–2 mm 10
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2 INSTALLATIONS 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. •See pgs. 2 and 7–10 for grounding details. a vinyl tape to prevent water seeping into
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CONTROL CABLE SIGNALS 3 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 AT-140 begins automatic tuning. Terminal Description More than [KEY] Key voltage. Grounded during tuning. 350 msec.* Max. current drain 100 mA. Start voltage 8 Approx. 7.5 V [13.6] 13.6 V DC + input terminal. [V] 6 Max. current drain 2 A 4 [STAR] Receives start voltage. Less than 1 V to 2 Max. current drai
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3 CONTROL CABLE SIGNALS 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 deta
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UNIT DESCRIPTION AND SPECIFICATIONS 4 Unit description 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 Specifications • 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 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
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Icom America Inc. Icom (Europe) GmbH Communication Equipment 2380 116th Avenue N.E., Bellevue, WA 98004, U.S.A. Himmelgeister Str. 100, Phone: (425) 454-8155 Fax: (425) 454-7619 D-40255 Düsseldorf, Germany URL: http//www.icomamerica.com Phone: 0211 346047 Fax: 0211 333639 URL: http//www.icomeurope.com Phone: (425) 454-7619 Icom Canada Icom Spain S.L. Glenwood Centre #150-6165 Highway 17, Delta, Ctra. de Gracia a Manresa Km. 14,750 08190 Sant B.C., V4K
