Table Of Contents; Miscellaneous Items; Features - Icom AT-140 Instruction Manual

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
Length: 10 m (32.8 feet)
w 50 Ω coaxial cable
e Two PL-259 connectors

FEATURES

Weather resistant
The AT-140 is housed in a durable, completely
weather resistant ASA case, with a rubber gasket. The
antenna tuner can be conveniently installed near the
antenna element.
Matches all bands
The AT-140 matches all frequencies on the HF marine
band. For example, the tuner matches a 7 m (23 feet)
long-wire antenna across 1.6-30 MHz.
Full automatic tuning
Just push the [TUNE] key on the transceiver, and the
AT-140 immediately tunes for a minimum SWR on any
frequency in the HF marine band.
HF operation on any size ship
The AT-140 allows HF operation where antenna ele-
ment length is restricted due to space.
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 automati-
cally stores the matching conditions for up to 45 fre-
quencies. Retuning a memorized frequency takes ap-
proximately 1 second.
Super capacitor for memory backup
Even if the AT-140 is not used for approximately 1
week, the built-in super capacitor backs up the con-
tents 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 the operat-
ing frequency.

TABLE OF CONTENTS

FOREWORD ................................................... i
IMPORTANT ................................................... i
EXPLICIT DEFINITIONS ................................. i
.
control cable
PRECAUTIONS ............................................. i
SUPPLIED ACCESSORIES .............................. i
MISCELLANEOUS ITEMS................................. ii
FEATURES ................................................... ii
1 SYSTEM INSTALLATION ........................... 1-2
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2 ANTENNA SYSTEM ................................. 3-4
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3 INSTALLATIONS .................................... 5-7
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4 CONTROL CABLE SIGNALS ..................... 8-9
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5 UNIT DESCRIPTION AND SPECIFICATIONS 10
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6 INSTALLATION EXAMPLE .....................11-12
Five Critical Points for a successful HF
installation ................................................ 1
Vessel ground connection
Antenna and tuners .................................... 2
The importance of grounding
Antenna for ship ....................................... 3
Antenna for land operation
Coaxial cable .......................................... 4
Ground and counterpoise
Installation outline .................................... 5
Control cable .......................................... 5
PL-259 connector .................................... 6
Waterproofing the antenna connection
Mounting ................................................ 7
Cable connections .................................... 7
Terminal information ................................. 8
Transceiver setting .................................... 9
Unit description .................................... 10
Specifications ....................................... 10
........................ 1
..................... 2
........................ 3
........................... 4
......... 6
ii