Cobra 25 WX NW ST User Manual

25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 1

How to Use Your

Contents

Features...........................................................................................1

The CB Story..................................................................................A1

FCC Regulations
FCCWarnings
Included Accessories

Controls & Indicators................................................................A2

Our Thanks toYou......................................................................A3

SoundTracker
Customer Support

Installation

Location.......................................................................................2

Mounting and Connection...................................................2

Antennas

CB Antenna................................................................................6

Marine Installation...................................................................6

Ignition Noise Interference ...................................................7

Operating Your 25 WX NW ST

Turning On Your CB.................................................................8

Setting Channel Selector.......................................................9

To Receive...................................................................................10

Selecting a Channel................................................................10

S-Meter.........................................................................................11

SoundTracker™System.........................................................12

Activating SoundTracker™..................................................13

NB,Off (Noise Blanker) Switch.............................................14

ANL (Automatic Noise Limiter) Switch.............................14

Dim Control................................................................................15

RF Gain Control.........................................................................15

Setting Squelch.........................................................................16

ToTransmit.................................................................................18

Transmit.......................................................................................18

RF Meter......................................................................................19

External Speaker.......................................................................19

PA (Public Address)..................................................................20

Weather Channels....................................................................23

Home And Office Set-Up.......................................................24

Temporary Mobile Set-Up.....................................................25

How Your CB Can ServeYou...................................................26

A Few Rules You Should Know............................................26

Channel 9 Emergency Messages.......................................26

Weather Channel Messages.................................................27

CB 10 Codes...............................................................................28

Frequency Ranges......................................................................30

25 WX NW ST Specifications..................................................31

Warranty Information..............................................................32

Optional Accessories..........................................................33-34

Order Form....................................................................................35

If You Think You Need Service .............................Back Cover

™

Cobra 25 WX NW ST

Features of This Product

• 40 CB Radio Channels

• SoundTracker™System

• Heavy-Duty Dynamic
Microphone

• Full 4 Watts AM RF Power Ou t p u t

• Instant Channel 19 and 9

• Front Panel 4-Pin Microphone
Connector

• Switchable Noise Blanker

• Adjustable Dynamike Boost

• Tactile Controls

• 7Weather Channels

• EmergencyWeather Alert

• 9 Ft Mic Cord

• Illuminated Front Panel

• Dimmer Control

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

CAUTION: TO REDUCE THE RISK OF ELECTRIC

SHOCK DO NOT REMOVE COVER (OR BACK)

NO USER SERVICEABLE PARTS INSIDE

REFER SERVICING TO QUALIFIED SERVICE

P E R S O N N E L

!

!

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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 2

InstallationInstallation

Location

Mounting and
Connection

Note

The transceiver is held in the
universal mounting bracket by
two thumbscrews which allow
for adjustment at a convenient
angle.

The bracket includes two self­tapping screws and star wash­ers.The mounting must be
mechanically strong,conve­niently located.

Location

Plan location of transceiver and microphone
bracket before starting the installation.

Select a location that is convenient for operation,
yet does not inte rfe re with the dri ver or passenger.

The transceiver is usually mounted to the under­side of the dash with the microphone bracket
beside it.

Mounting and Connection

1

Hold the radio with the mounting bracket in
the exact desired location.If there is no inter­ference,remove the bracket and use it as a
template to mark the location for the mount­ing screws.

3

Connect the antenna cable plug to the recep­tacle marked “ANT” on the back of the unit.

2

Drill the holes and secure the bracket.

continued

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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 4

Note

Connecting to an accessory fuse
prevents the unit from being left
on accidentally,and also per­mits operating the unit without
running the engine.

Note

In positive ground vehicles the
red wire goes to the chassis and
the black wire is connected to
the ignition switch.

6

Plug power cable into back of unit marked
“Power”. Be sure to observe polarity markings.

InstallationInstallation

Note
Before installing the CB radio,

visually check the vehicle’s
battery connection to deter­mine which terminal, positive
or negative,is grounded (pos­itive is the larger of the two)
to the engine block (or chas­sis).A negatively grounded
vehicle has its negative lead
grounded to the chassis.

Note

When connected to an accesso­ry fuse,unit will self test the
emergency weather alert auto­matically when ignition is
turned on.Turns itself on & off.

4

In a negative grounded vehicle,connect the
red lead of the DC power cord to an accessory
12 volt fuse.

5

Connect the black lead to the negative side of
the vehicle.This is usually the chassis.Any con­venient location with a good electrical contact
(remove paint) may be used.

7

Mount the microphone
bracket on the right side
of the unit (driver’s left)
using two screws sup­plied.Bracket should be
placed under the dash
so microphone is readily
accessible.

8

Attach the 4-pin microphone cable to recepta­cle on front of unit and Install unit in bracket
securely.

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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 6

Ignition Noise InterferenceAntennas

CB Antenna

Note

For optimum performance in
passenger cars the ideal anten­na location is on the center of
the roof.Second 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,if the antenna is mounted
on the mirror bracket.

Note

3-way Combination Antennas
are also available which allow
operation of all three bands
(AM-FM & CB),using a single
antenna.However,this type of
antenna usually results in less
than normal transmit and
receive range when compared
to a standard-type“Single
Band”CB antenna.Call

773.889.3087 for further infor­mation.

CB Antenna

Si n ce the maximum allowable power output of
the tra n s m i t ter is limited by the FCC ,the ante n n a
is cri t i cal in affe cting transmission distance.Only a
p ro pe rly matched antenna sys tem will allow maxi­mum power output.Co b ra loaded ty pe ante n n a
m odels are highly re commended for most instal­l at i o n s.For models with Weather Fe a t u re (W X ) ,a

Dual Band (Ce n ter Lo a d / Base Load) antenna is
re co m m e n d e d. Consult your Co b ra dealer for fur-

ther details,or call 773.889.3087 and speak to a
Co b ra re p re s e nt at i ve.

1

A standard antenna connector is provided
on the transceiver for easy connection.

Marine Installation

The transceiver will not operate at maximum effi­ciency in a boat without a ground plate,(unless it
has a steel hull).Before attempting installation ,
consult your dealer for information regarding an
adequate grounding system and prevention of
electrolysis between fittings in the hull and water.

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 25 WX NW ST 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.

6

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Operation

Turning On Setting Channel

Turning On

Make sure the power cord,antenna and micro­phone are connected to their proper connectors
before starting.

1

The CB/ANL/PA button should be in the

CB/ANL position and CB/WX on CB position.

Setting Channel Selector

1

Select one of forty channels and adjust
volume.The selected channel is indicated by
the LED readout directly above the channel
selector knob

Operation

Selector

2

Ro t ate the On/Off Volume knob c l oc kw i s e to
a normal listening level.

8

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Operation

To Receive

Selecting A
Channel

Note

Switch to 9 (Emergency) or 19
(Information) for instant access
to these channels.

To Receive

1

Rotate the On/Off Volume knob clockwise

the green RT/TX/WX LED will be illuminated.

Selecting A Channel

S-Meter

Swings proportionately to strength of incoming
signal when receiving.

Operation

S-Meter

1

Switch to NOR to select desired channel.

10

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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 12

OperationOperation

Note

SoundTracker™ gives you
clearer,cleaner reception to
improve CB communications
while on the air.

The SoundTrackerTMSystem

While previous systems only “blanket out”or limit
noise in higher sound frequencies,the revolution­ary new SoundTrackerTMSystem actually reduces
noise while leaving the signal intact in the recep­tion mode. In the transmission mode,it actually
strengthens the signal,providing you with a
significant reduction in noise on reception
and transmission.

Sound clarity is measured by the ratio
of the signal level to the noise level.
The higher the signal-to-noise ratio,
the better the sound.

How SoundTrackerTMWorks

On Reception - “Cuts noise coming in”

With a normal CB,distant signals fall below
the squelch level and are unintelligible.With a
SoundTrackerTMCB,the noise level is cut up to
90%,which increases the signal-to-noise ratio
and dramatically improves signal clarity.This also
allows you to significantly reduce the squelch
level,which greatly expands your listening range.

OnTransmission - “Strengthens signals going out”

A SoundTrackerTMCB strengthens the transmit
signal by more effectively using the available RF
power output of the CB.The result is improved
transmission signal clarity and an expanded
transmission range.

Activating SoundTracker™

1

Push and release the ST button.Red LED
is illuminated when SoundTracker™ is
turned on.

Activating
SoundTracker

™

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