Antennas; Cb Antenna; Marine Installation; Ignition Noise Interference - Cobra 29 LTD CLASSIC Owner's Manual

Antennas

CB Antenna

CB Antenna
Since the maximum allowable power output of
the transmitter is limited by the FCC, the antenna
is critical in affecting transmission distance. Only
a properly matched antenna system will allow
Note
maximum power output. Cobra loaded type
For optimum performance
antenna models are highly recommended for
in passenger cars the ideal
most installations. Consult your Cobra dealer
antenna location is on the
for further details, or visit our website:
center of the roof. Second
www.cobra.com
choice is on the
center of the trunk.
Note
Because many newer trucks
feature fiberglass door skins,
the outside mirror must be
grounded to the chassis via a
ground strap when antenna is
mounted on the mirror bracket.
A standard antenna connector is provided
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on the transceiver for easy connection.
Note
3-way Combination
Antennas are also available
which allow operation of

Marine Installation

all three bands (AM-FM &
The transceiver will not operate at maximum
CB), using a single antenna.
efficiency in a boat without a ground plate,
However, this type of antenna
(unless it has a steel hull). Before attempting
usually results in less than
installation , consult your dealer for information
normal transmit and receive
regarding an adequate grounding system and
range when compared to a
prevention of electrolysis between fittings in the
standard-type "Single Band"
hull and water.
CB antenna.
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Ignition Noise Interference

Use of a mobile receiver at low signal levels is
normally limited by the presence of electrical
noise. The primary source of noise in automobiles
is from the alternator and ignition system.
Typically, when signal level is adequate, the
background noise does not present a serious
problem. Also, when extremely low level signals
are being received, the transceiver may be
operated with the vehicle's engine turned off.
The unit requires very little current and therefore
will not significantly discharge the vehicle's
battery.
Even though the Cobra 29 LTD Classic has an
automatic noise limiter, in some installations
ignition interference may be high enough to
make good communications impossible. Many
possibilities exist and variations between vehicles
require different solutions. Consult your COBRA
dealer or a 2-way radio technician for help in
locating the source of a severe noise.
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