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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 op-
eration. If you have any questions, contact your dealer.
IMPORTANT
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-
lation instructions.
EXPLICIT DEFINITIONS
PRECAUTIONS
R DANGER HIGH VOLTAGE! NEVER touch
the antenna terminal, ground terminal, antenna or
counterpoise while transmitting. Place the AT-140, an-
tenna and counterpoise in positions where no one can
touch them.
NEVER use without a ground connection.
NEVER transmit during internal adjustment. This may
cause an electric shock.
USE the ground terminal for ground connection.
The mounting plate is not connected internally.
DO NOT operate your HF marine transceiver without
running the boat’s engine.
AVOID using the AT-140 in areas where the temper-
ature is below –30°C (–22°F) or above +60°C
(+140°F).
Ground terminal
Mounting plate
Word Definition
R WARNING
Personal injury, fire hazard or electric
shock may occur.
CAUTION Equipment damage may occur.
NOTE
If disregarded, inconvenience only. No
personal injury, fire hazard or electric
shock.
SUPPLIED ACCESSORIES
The following accessories are supplied with the AT-140.
Qty.
q U-bolts ………………………………………………2
w U-bolt plates …………………………………………2
e Flat washers (M6 large) ……………………………8
r Flat washers (M6 small) ……………………………4
t Spring washers (M6) ………………………………8
y Nuts (M6) ……………………………………………8
u Hex head bolts (M6×50) ……………………………4
i Self-tapping screws (A0 6×30) ……………………4
o Weatherproof cap……………………………………1
!0 6-pin connector………………………………………1
!1 Connector pins ………………………………………4
!2 Ground cable (OPC-412) …………………………1
q
w
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!0
!1
!2
Icom, Icom Inc. and the are registered trademarks of
Icom Incorporated (Japan) in the United States, the United
Kingdom, Germany, France, Spain, Russia and/or other
countries.