Icom AH-4 Instructions page 2

✍
NOTE: After inserting the coaxial cable into the AH-
4 top cover, solder the PL-259 connector to the
coaxial cable.
➀
Remove the top cover (Fig. 1).
➁
Install the control cable and coaxial cable (Fig. 1).
➂
Connect and solder the PL-259 connector to the
coaxial cable (Fig. 4).
Fig. 1 COVER REMOVAL AND CABLE
INSTALLATION
Strain relief
insert
Coaxial
cable
Control
cable
Cable
clamp
Fig. 2 CABLE CONNECTIONS (ex. IC-706MKII)
GND
✍
NOTE: For the IC-756
and IC-746, connect
to ANT 1.
Fig. 3 GROUND CONNECTIONS
The transceiver and antenna tuner must have an ade-
quate ground connection. Otherwise, the overall ef-
fency of the transceiver and antenna tuner installation
will be reduced. Interference, RF feed back and elec-
trical shocks from other equipment could also occur.
For best results, use the heaviest gauge wire or strap
available and make the connection as short as possi-
ble. (see right)
• A long wire connected to the GND terminal as a counter-
poise is also acceptable.
INSTALLATION
Coaxial cable
IC-706MKII rear panel
➃
Connect the control cable to the AH-4 (Fig. 2).
➄
Connect the GND cable to the AH-4 (Fig. 3).
➅
Replace the top cover.
➆
Mount the AH-4 in the desired location; on an an-
tenna pole, in your vehicle's trunk, etc. (Fig. 5).
➇
Connect an antenna to the AH-4 (Fig. 6).
➈
Connect the control cable and the coaxial cable to
the transceiver.
➀
Remove 8 screws from the top cover and remove
the cover.
➁
Loosen the screws on both cable clamps. If de-
sired, install a strain relief insert (supplied) corre-
sponding to the diameter of the cable.
➂
Install the coaxial cable through the top cover
cable clamp.
➃
Install the control cable through the bottom cover
cable clamp.
➄
After connecting the coaxial cable and control ca-
bles, tighten the cable clamp screws.
black (GND)
red (DC13V)
PL-259
white (START)
connector
green (KEY)
J2
Top cover
GND
Control cable
• Ground example
To AH-4 GND terminal
Copper pipe Metal object
Antenna element
AH-2b (optional)
J8
Bottom cover
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Copper screen