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' Icom At 140'




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INSTRUCTION MANUAL
HF AUTOMATIC
ANTENNA TUNER
AT140
FOREWORD PRECAUTIONS
Thank you for purchasing the AT140 HF AUTO R DANGER HIGH VOLTAGE NEVER touch
MATIC ANTENNA TUNER the antenna terminal ground terminal antenna or
counterpoise while transmitting Place the AT140 an
The AT140 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 AT140
SAVE THIS INSTRUCTION MANUAL This in
struction manual contains important safety and instal Ground terminal
lation 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 boats engine
If disregarded inconvenience only No AVOID using the AT140 in areas where the temper
NOTE personal injury fire hazard or electric ature is below 30C 22F or above 60C
shock SUPPLIED ACCESSORIES
The following accessories are supplied with the AT140 Qty
q Ubolts 2
w Ubolt 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 M650 4
o i Selftapping screws A0 630 4
0 1
o Weatherproof cap 1
r 0 4pin6pin connector 1
t 1 Connector pins 4
y 2 Ground cable OPC412 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 andor other ITEMS TABLE OF CONTENTS
The following parts are additionally required for instal FOREWORD i
lation but are not supplied with the AT140
IMPORTANT i
Purchase these parts locally
EXPLICIT DEFINITIONS i
q AWG shielded cable
Icom offers an optional OPC1147N CONTROL CABLE PRECAUTIONS i
Length 10 m 328 feet SUPPLIED ACCESSORIES i
w 50 coaxial cable
e PL259 connectors MISCELLANEOUS ITEMS ii
FEATURES ii
TABLE OF CONTENTS ii
FEATURES
1 ANTENNA SYSTEM 12
Matches all bands I Antenna for ship 1
The AT140 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
longwire antenna across 1630 MHz I Ground and counterpoise 2
Full automatic tuning 2 INSTALLATIONS 35
Just push the TUNE switch on the transceiver and I lnstallation 3
the AT140 adjusts immediately to the minimum SWR I Control cable 3
of any frequency on any HF marine band I PL259 connector 4
I Mounting 4
HF operation on any size ship I Cable connections 5
The AT140 allows you HF operation where length is restricted due to space 3 CONTROL CABLE SIGNALS 67
I Terminal information 6
Weather resistant I Transceiver setting 7
The AT140 is housed in a durable completely ASA case with a rubber gasket The antenna 4 UNIT DESCRIPTION AND can be conveniently installed
both on the deck or 8
in the cabin near the antenna element I Unit description 8
I 8
Simple 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 tuneup time the AT140 the matching conditions for up to 45 for a memorized frequency takes approx 1
Super capacitor for memory backup
Even if the AT140 is not used for approx 1 week the
builtin super capacitor backs up contents of the power tune up
The AT140 emits low output power during tuning This
feature reduces the possibility of causing other through function
The tuner through function is built into the AT140 This
function helps improve receiver gain depending on the
antenna element length used and operating
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
16 MHz band 7 m 230 feet or longer a longwire antenna
4 MHz band 3 m 98 feet or longer
The longer the antenna element the better the an
tenna efficiency
Undesirable antenna element lengths Insulator
AVOID multiples of 12 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 94 188
16 2
1m 39 inches
For example if 15 m is selected for an antenna ele
ment length you have no problem in the 1625 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 AH2b instruction manual for the AH2b
land mobile operation Ask your Icom Dealer for de and AT140 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 AH2b ANTENNA ELEMENT is available antenna element length above
The AH2b includes a sturdy tow hook mount system
for holding a 25 m 82 feet stainless steel antenna
element plus all the necessary hardware
AH2b
ANTENNA SYSTEM 1
I Coaxial the leadin cable of the AT140 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 from an antenna electric pump and other elec
lights etc Ask your Dealer for Ground and a ships ground is required AT140s ground terminal MUST be connected
If your ship is made of FRP etc and a good ships
to your ships ground Grounding prevents electric ground is not available connect a interference to other equipment and other
14radial for
problems Grounding also ensures effective signal
each Ground 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 oilcatch pan
The mounting plate is NOT con 14 quarter wavelength radial for each band is suit
nected to the AT140s internal ground able for a counterpoise Install the counterpoise di
Ideal ground points rectly below the AT140s 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 47 ground points 16 4
AVOID the following points if possible These con 1m 39 may cause noise or Engine block Ground
cable
Ships DC battery ground For best results use the heaviest gauge wire or metal
strap available Make the distance between the 140s ground terminal and ships ground as short as
All ground cables from the AT140 HF transceiver
on your ship should be connected to only 1 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 between 2 or more ships grounds may cause
mast is electrically connected to sea 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 Ask your technical dealer installer or refer to a tech
nical book etc for RF ground details
2 I Installation outline
q Connect a control cable and 4conductor shielded r Connect the control cable and the coaxial between
cable the transceiver and the AT140
Refer to Control cable below Refer to p 5 Cable w Connect and solder the PL259 connector to the
t Connect an antenna ships ground or counter
coaxial cable poise
Refer to p 4 PL259 connector Refer to p 1 Antenna for ship and p 2 Ground and
e Mount the AT140 in the desired location
Refer to p 4 I Control cable
Between the AT140 and HF marine transceiver con OPC566 for ICM710RT M700PRO
nect 4 control signal lines as shown below To prevent OPC1147N for ICM802
RF feedback use a 4conductor 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 328 ft long optional control
cables as at right
D When connecting to Icom ICM802
To AT140
To transceiver Use the optional OPC1147N or
assemble the desired length 4
conductor shielded cable and the
connector kits supplied with the
E Black transceiver and the tuner E Black
136 Red 136 Red
STAR White STAR White
KEY Green KEY Green
GND GND OPC1147 OPC1147N
D When connecting to Icom ICM710RT ICM700PRO
Use the optional either the connector to the AT140 To AT140
or the transceiver requires assem
To transceiver bly or assemble the desired length
STAR White
4conductor shielded cable and the
KEY Green connector kits supplied with the
transceiver and the tuner E Black
136 Red
STAR White
KEY Green
136 Red GND
E Black
GND OPC1147 OPC1147N
D When connecting to Icom ICM700TY IC78
Use the optional OPC1147N this To AT140
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
136 Red 136 Red
STAR White STAR White
KEY Green KEY Green
GND GND
OPC1147 INSTALLATIONS
2
I PL259 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 38 inches
I the AT140 either horizontally or vertically with Mounting on a flat surface
one of the water drains facing downwards After Using nuts and bolts Using remove the screw in the water
drain on a MastMetal pole
Mast Using Ubolts
Metal pole
Ubolt
Ubolt plate
Flat washerL
Spring washer
Flat washerS
Flat
washerS
Spring
washer
Flat
Mount the AT140 securely with the
supplied nuts and bolts Otherwise vibrations and Flat
washerL Weatherproof cap
shocks due to waves etc could loosen the antenna Hex head Drill a hole here
bolt Diameter78 mm 932516 inches
tuner making if fall causing personal injury
2 I Cable connections
q Connect the coaxial cable and the control cable to r Connect the coaxial cable and the control cable to
the AT140 as illustrated below the transceiver as illustrated below
w Cover both the antenna and the control cable con t Ground the transceiver AT140 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 AT140
NEVER ground the AT140 via the mounting
plate It is not connected to ground 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
AT140 internal connector damaged or bad
connection
Icom HF transceiver
AT140
Ground
28 ft
N 10 m 3
P C 1147
Ground O
CONTROL CABLE SIGNALS 3
I Terminal the following points when using a nonIcom Start voltage When a start voltage less than
1 V is received the
Terminal Description AT140 begins automatic tuning
KEY Key voltage Grounded during tuning More than
350 msec
Max current drain 100 mA Start
voltage 8 Approx 75 V
136 136 V DC input terminal V
Max current drain 2 A 6
STAR Receives start voltage
2 Less than 1 V to
Max current drain 1 mA start tuning
E Ground terminal for above signals Time
For tuner through operation Less than 250 msec
Key voltage KEY
During automatic tuning the AT140 grounds the key
voltage line and the HF transceiver reduces output
power
During automatic tuning
voltage 8 Approx 75 V
STAR
136 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
NORMAL mode
OFF mode
STAR
Mode switch S1
3 CONTROL CABLE SIGNALS
I Transceiver setting
ICM700 with serial number 2500 and below ICM710RT ICM700PRO
In the ICM700 change the TUNE switch setting In the ICM710RT and ICM700PRO select the an
from the 1 position to the 2 position Confirm that tenna tuner type as AH3 in initial set mode See
the KEY switch is in the 2 position Refer to the IC ICM710RT instruction manual p 13 or ICM700PRO
M700 instruction manual p 9 for details instruction manual p 11 for details
KEY TUNE
ICM802
In the ICM802 select the antenna tuner type as AT
Confirm 2 position
140 in initial set mode See ICM802 instruction man
Select 2 position ual p 49 for details
NonIcom HF transceiver
Other ICM700 and ICM700TY
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 AT140 with
ual for details
ICM700TY
IC78 NOTE When a nonIcom automatic tuner was pre
In the IC78 select the antenna tuner type as 4 AH viously used confirm the tuner settings Refer to
4 in initial set mode See IC78 instruction manual the instruction manual for details
p 32 for details
With AT130 setting use of the AT140 is possible how
ever the tuner through function cannot be UNIT DESCRIPTION AND
I Unit description
340 mm 134 in
230 mm 91
80 mm 31 in
Ground terminal
Mounting plate
Water drain screw
Antenna cable receptacle Control cable Antenna terminal
Mounting plate
915 mm 36 in
I Frequency coverage 1630 MHz with 7 m 230 feet or longer antenna element
Power supply requirement 136 V DC supplied from HF transceiver
Current drain Max 2 A
Operating temperature range 30C to 60C 22F to 140F
Weight 25 kg 55 lb
Antenna connector SO239 50
Max Input power 150 W PEP 100 W continuous
Automatic tuning time Approx 23 sec general condition Max 15 sec
Approx 1 sec retuning for a memorized frequency
Automatic tuning accuracy SWR 201 after tuning except for multiples of 12
All stated are subject to change without notice or obligation
Icom America Inc Icom Europe GmbH
Corporate Communication Equipment
2380 116th Avenue NE Bellevue WA 98004 USA
Himmelgeister Str 100
Phone 1 425 4548155 Fax 1 425 4541509
D40255 Dsseldorf Germany
URL Phone 49 0211 346047 Fax 49 0211 333639
Email URL Customer service
Email Phone 425 4547619
Icom Canada Icom Spain SL
Glenwood Centre 1506165 Highway 17 Delta Crta de Gracia a Manresa Km 14750 08190 Sant
BC V4K 5B8 Canada Cugat del Valles Barcelona SPAIN
Phone 1 604 9524266 Fax 1 604 9520090 Phone 34 93 590 26 70 Fax 34 93 589 04 46
URL URL Email Email Icom Australia Pty Ltd
Icom UK Ltd
ABN 88 006 092 575 Unit 9 Sea St Herne Bay Kent CT6 8LD UK
290294 Albert Street Brunswick Victoria 3056 Phone 44 01227 741741 Fax 44 01227 741742
Australia URL Phone 61 03 9387 0666 Fax 61 03 9387 0022 Email
URL Email Icom New Zealand Icom France Sa
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 Phone 33 5 61 36 03 03 Fax 33 5 61 36 03 00
Email URL Email
Asia Icom Inc Icom Polska
6F No 68 Sec 1 ChengTeh Road Taipei Taiwan ROC 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 Email Email Beijing Icom Ltd
1305 Wanshang Plaza Shijingshan Road Beijing
China
Phone 86 010 6866 6337 Fax 86 010 6866 3553
Email in Japan
20022004 Icom Inc 1132 Kamiminami Hiranoku Osaka 5470003 Japan

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