Icom AH-4 Instructions page 2

INSTALLATION
✍ NOTE: After inserting the coaxial cable through the water-
proof cap and into the AH-4 top cover, solder the PL-259
connector to the coaxial cable.
q Remove the top cover (Fig. 1).
Install the control cable and coaxial cable (Fig. 1).
w
Connect and solder the PL-259 connector to the coaxial
e
cable (Fig. 3).
Connect the control cable to the AH-4 (Fig. 2-1).
r
Connect the GND cable to the AH-4 (Fig. 4).
t
Fig. 1 COVER REMOVAL AND CABLE INSTALLATION
q
w
e
r
t
Strain relief
insert
Coaxial
cable
Control
cable
Cable
Rubber seal
clamp
About the rubber seal
Correct position Incorrect position
Rubber seal
Groove
Bottom cover
Bottom cover
Fig. 2-1 CABLE CONNECTIONS (eg. IC-7000)
✍ NOTE: Connect the coaxial cable to the appropriate antenna
connector if the transceiver has more than one.
See your transceiver's instruction manual for details.
Coaxial cable
IC-7000 rear panel
PL-259
connector
GND
Top cover
Control cable
+ See the Fig. 2-2 as shown to the right above.
q Put the flat washer, crimp-on wire terminal, star washer
and then wing nut on the base bolt. Then, tighten the
wing nut.
• Before you tighten the wing nut, make sure the base nut is
firmly tightened.
• After you tighten the wing nut, carefully bend the wire terminal
up so the wire lines up with the insulator.
Replace the top cover.
y
u Mount the AH-4 in the desired location; on an antenna
pole, in your vehicle's trunk, and so on. (Fig. 5).
Connect an antenna to the AH-4 (Fig. 6).
i
o Connect the control cable and the coaxial cable to the
transceiver.
Remove the 8 screws from the top cover and remove the cover.
Loosen the screws on both cable clamps. If desired, install a strain relief
insert (supplied) corresponding to the diameter of the cable.
Install the coaxial cable through the top cover cable clamp.
Insert the control cable through the bottom cover cable clamp.
After connecting the coaxial cable and control cables, tighten the cable
clamp screws.
NOTE:
• Make sure the cable clamps are well tightened with the screws, oth-
erwise the waterproof protection may not be guaranteed.
• We recommend that you also wrap rubber vulcanizing tape or electri-
cal tape over the cable clamps for better waterproofing.
NOTE:
When attaching the tuner cover, make sure dust or other material does
not adhere to the rubber seal. If dust or other material is on the seal
when attaching, waterproof protection may not be guaranteed.
Make sure the rubber seal is properly seated into the groove.
Antenna element
AH-2b (optional)
Black (GND)
Red (DC13V)
White (START)
Green (KEY)
J2
J8
Bottom
GND
cover
Place the weatherproof cap over as much of the insulator
w
as possible.
e Wrap the insulator with the rubber vulcanizing tape, start-
ing at its bottom, then the cap, and finally the antenna
wire.
This will help prevent water seepage.
• Also, you may wrap electrical tape over the wrapped rubber
vulcanizing tape for better waterproofing.
Fig. 2-2 Waterproofing the antenna connection
q
Insulator
Fig. 3 PL-259 CONNECTOR SOLDERING
q
Coupling ring
w
Fig. 4 GROUND CONNECTIONS
The transceiver and antenna tuner must have an adequate
ground connection. Otherwise, the overall efficiency of the
transceiver and antenna tuner installation will be reduced.
Interference, RF feedback and electrical shocks from other
equipment could also occur.
For best results, use the heaviest gauge wire or strap avail-
able, and make the connection as short as possible. (see
the illustration to the right)
• A long wire connected to the GND terminal as a counterpoise is
also acceptable.
Fig. 5 MOUNTING THE AH-4
• Mounting on an antenna pole
Wing nut
Star washer
Crimp-on wire
terminal
Flat washer
Base nut
Insulator
w e
Carefully bend this
p a r t u p , A F T E R
y o u t i g h t e n t h e
wing nut.
Rubber vulcanizing tape
Slide the coupling ring over the coaxial cable. Carefully
q
solder solder
30 mm
cut only the cable jacket, and pull it out to reveal 10 mm
e
(0.4 in) of braid.
• Tin the exposed braid and then pull the jacket out.
10 mm (Tin)
w Strip the cable, as shown to the left. Tin the entire length
10 mm
Tin
of the exposed center conductor.
r
e Slide the connector body over the cable and solder, as
shown to the left.
1–2 mm
(10 mm ≈ 3 ⁄ in)
Screw the coupling ring onto the connector body.
8 r
Copper pipe
• Mounting on a flat location
Using self-tapping screws
Using the supplied U-bolts
Nut
Spring
washer
Flat
washer
Hex head
bolt
Pull the tape to slightly
stretch it as you wrap
f i r m l y a r o u n d t h e
weatherproof cap.
To the AH-4 GND terminal
Metal object Copper screen
Using nuts and bolts
AH-4
Weatherproof cap
Drill a hole here
(diameter: 6.6–7 mm; 1 ⁄ – 9 ⁄ inches)
4 32