External Antenna Tuners; Installation And Connections - Icom ic-718 Instruction Manual

3

INSTALLATION AND CONNECTIONS

 External antenna tuners
CONNECTING THE AH-4 (p. 30)
Coaxial cable (from the AH-4)
IC-718
Ground
CONNECTING THE AH-740 (p. 30)
Coaxial cable (from the AH-740)
IC-718
Ground
• The coaxial cable is supplied with the AH-740.
The OPC-2321 Control cable is optional.
• See the AH-740 instruction manual for the installation and con-
nection details.
CONNECTING THE AT-180 (p. 29)
DO NOT connect an AT-180 and AH-4 or AH-740
at the same time. Both tuners will not function cor-
rectly.
Coaxial cable supplied
with the AT-180
IC-718
14
Control cable
Ground
AH-740
OPC-2321
ACC cable supplied with the AT-180
[ANT]
[ACC]
13
9 10 11 12
5 6 7 8
1 2 3 4
AH-4
Coaxial cable and control cable connections
OPC-2321
Ground
About the ground strap connection
Ground
strap
Vehicle chassis or body
When connecting the AT-180, turn OFF the IC-
718's power, otherwise, the CPU may malfunction
and the AT-180 may not function properly.
AT-180 [ACC]
Ground
Long wire or optional AH-2b
Rubber
vulcanizing
tape, then
electrical
tape.
Coaxial
cable
HF
antenna
one of two
connectors