Radio Shack TRC521 CB - Manual (Page 4)

4
Dual band antennas provide optimum reception of CB and
WX channels. For mobile installations (car, boat), a non-
directional antenna provides the best CB reception. Mobile
antennas use your vehicle’s metal body as a ground plane.
If the CB is installed in a boat, your boat’s steel hull is used
as a ground plane. Without a steel hull serving as a ground
plane, you will not receive maximum efficiency. Before
using your CB in a boat, consult with your boat dealer
regarding an adequate grounding system.
Keep in mind that for the best performance you should
mount the antenna:
• as high as possible.
• as far as possible from sources
of electrical noise.
• vertically.
1. Follow the antenna’s
instructions to mount it.
2. Route the antenna cable to
the CB radio and connect it
to the
ANT. jack. 
C
ONNECTING TO
V
EHICLE
B
ATTERY
P
OWER
1. Connect the CB’s red POWER wire to a terminal in your
vehicle’s fuse box that has power only when the ignition
is in the ACC (accessory) or ON position.
2. Connect the CB’s black POWER wire to a metal part of
the vehicle’s frame (chassis ground). Ô
C
ONNECTING AN
O
PTIONAL
E
XTERNAL
S
PEAKER
You can connect an
external speaker to the
CB. Use an 8-ohm
speaker with a
1 / 8 -inch
(3.5-mm) plug. Insert the
speaker’s plug into the
CB’s
EXT. SP. jack.
Antenna Cable
ANT. Jack

CAUTION

• Avoid routing the cable next to
sharp edges or moving parts,
which might damage the cable.
• Do not run the cable next to
power cables or other radio
antenna cables.
• Do not run the cable through
the engine compartment or
other areas that produce
extreme heat.
Ô
NOTE
Ô
Do not connect the black wire to a
non-metallic (plastic) part, or to any
part insulated from the vehicle’s
chassis by a non-metallic part.
EXT. SP. Jack
Black and red
POWER wires