Cobra Electronics Car Stereo System 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  
Cobra 25 WX NW ST  
Contents  
Features...........................................................................................1  
The CB Story..................................................................................A1  
FCC Regulations  
FCC Warnings  
Included Accessories  
Controls & Indicators ................................................................A2  
Our Thanks to You ......................................................................A3  
SoundTracker  
Features of This Product  
• 40 CB Radio Channels  
• SoundTrackerSystem  
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  
Heavy-Duty Dynamic  
Microphone  
Full 4Watts AM RF Power Output  
Instant Channel 19 and 9  
Turning On Your CB.................................................................8  
Setting Channel Selector.......................................................9  
To Receive ...................................................................................10  
Selecting a Channel................................................................10  
S-Meter.........................................................................................11  
Front Panel 4-Pin Microphone  
Connector  
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  
To Transmit.................................................................................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 Serve You...................................................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  
Switchable Noise Blanker  
Adjustable Dynamike Boost  
Tactile Controls  
• 7 Weather Channels  
Emergency Weather 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  
PERSONNEL  
1
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 4  
Installation  
Installation  
Note  
Connecting to an accessory fuse  
prevents the unit from being left  
on accidentally, and also per-  
mits 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
7
Plug power cable into back of unit marked  
“Power. Be sure to observe polarity markings.  
Note  
Mount the microphone  
bracket on the right side  
of the unit (drivers left)  
using two screws sup-  
plied. Bracket should be  
placed under the dash  
so microphone is readily  
accessible.  
Before installing the CB radio,  
visually check the vehicles  
battery connection to deter-  
mine which terminal, positive  
or negative, is grounded (pos-  
itive is the larger of the t wo)  
to the engine block (or chas-  
sis).A negatively grounded  
vehicle has its negative lead  
grounded to the chassis.  
4
5
In a negative grounded vehicle, connect the  
red lead of the DC power cord to an accessory  
12 volt fuse.  
Connect the black lead to the negative side of  
the vehicle.This is usually the chassis. Any con-  
venient location with a good electrical contact  
(remove paint) may be used.  
Note  
When connected to an accesso-  
ry fuse, unit will self test the  
emergency weather alert auto-  
matically when ignition is  
8
Attach the 4-pin microphone cable to recepta-  
cle on front of unit and Install unit in bracket  
securely.  
turned on.Turns itself on & off.  
4
5
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 6  
Antennas  
Ignition Noise Interference  
Use of a mobile receiver at low signal levels is  
CB Antenna  
CB Antenna  
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 back-  
ground noise does not present a serious problem.  
Also, when extremely low level signals are being  
received, the transceiver may be operated with  
the vehicles engine turned off.The unit requires  
very little current and therefore will not signifi-  
cantly discharge the vehicles battery.  
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 maxi-  
mum power output. Cobra loaded type antenna  
models are highly recommended for most instal-  
lations.For models with Weather Feature (WX),a  
Dual Band (Center Load/Base Load) antenna is  
recommended. Consult your Cobra dealer for fur-  
ther details, or call 773.889.3087 and speak to a  
Cobra representative.  
Note  
For optimum performance in  
passenger cars the ideal anten-  
na location is on the center of  
the roof. Second choice is on the  
center of the trunk.  
Note  
Even though the Cobra 25 WX NW ST has an  
automatic noise limiter, in some installations igni-  
tion interference may be high enough to make  
good communications impossible. Many possibili-  
ties 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.  
Because many newer trucks  
feature fiberglass door skins, the  
outside mirror must be ground-  
ed to the chassis via a ground  
strap, if the antenna is mounted  
on the mirror bracket.  
Note  
1
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-typeSingle  
Band”CB antenna. Call  
A standard antenna connector is provided  
on the transceiver for easy connection.  
Marine Installation  
The transceiver will not operate at maximum effi-  
ciency 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.  
773.889.3087 for further infor-  
mation.  
6
7
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 8  
Operation  
Operation  
Turning On  
Setting Channel Selector  
Turning On  
Setting Channel  
Selector  
Make sure the power cord, antenna and micro-  
phone are connected to their proper connectors  
before starting.  
1
Select  
one of forty channels and adjust  
volume.The selected channel is indicated by  
the LED readout directly above the channel  
selector knob  
1
The CB/ANL/PA button should be in the  
CB/ANL position and CB/WX on CB position.  
2
Rotate the On/Off Volume knob  
a normal listening level.  
clockwiseto  
8
9
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 10  
Operation  
Operation  
S-Meter  
To Receive  
To Receive  
S-Meter  
Swings proportionately to strength of incoming  
signal when receiving.  
1
Rotate the  
On/Off Volume knob clockwise  
the green RT/TX/WX LED will be illuminated.  
Selecting A Channel  
Selecting A  
Channel  
Note  
Switch to 9 (Emergency) or 19  
(Information) for instant access  
to these channels.  
1
Switch to NOR to select desired channel.  
10  
11  
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 12  
Operation  
Operation  
TM  
The SoundTracker System  
Activating SoundTracker™  
Activating  
SoundTracker™  
While previous systems only blanket out”or limit  
noise in higher sound frequencies, the revolution-  
TM  
ary new SoundTracker System actually reduces  
Note  
noise while leaving the signal intact in the recep-  
tion mode. In the transmission mode, it actually  
strengthens the signal,providing you with a  
significant reduction in noise on reception  
and transmission.  
SoundTracker™ gives you  
clearer, cleaner reception to  
improve CB communications  
while on the air.  
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.  
1
Push and release the  
is illuminated when SoundTracker™ is  
turned on.  
ST button. Red LED  
TM  
How SoundTracker Works  
On Reception -Cuts noise coming in”  
With a normal CB, distant signals fall below  
the squelch level and are unintelligible.With a  
TM  
SoundTracker CB, 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.  
On Transmission - Strengthens signals going out”  
TM  
A SoundTracker CB 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.  
12  
13  
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 14  
Operation  
Operation  
NB, OFF (Noise Blanker) Switch  
Dim Control  
NB, OFF  
(Noise Blanker)  
Switch  
Dim/Dyna  
Control  
Note  
The RF noise blanker is very  
effective in reducing repetitive  
noises such as ignition interfer-  
ence.  
Note  
The Dim controls the brightness  
of the front panel,signal strength  
meter and channel display.  
1
1
When switched to NB position the RF Noise  
Blanker is activated, providing increased noise  
filtration.  
Rotate the  
maximum brightness; counter-clockwise  
for minimum.  
DIM knob clockwise for  
When switched to OFF position Noise  
Blanking Filtration will be turned off.  
Setting Dynamike  
This controls the microphone sensitivity  
(outgoing audio level).  
Setting  
Dynamike  
ANL (Automatic Noise Limiter) Switch  
ANL (Automatic  
Noise Limiter)  
Switch  
1
1
When switched to CB/ANL the Automatic  
Initially, set fully  
clockwise so that maxi-  
Noise Limiter is activated.This helps reduce  
noise created by the vehicles electronics.  
mum voice volume is available. Dynamike  
may have to be reduced in some conditions.  
14  
15  
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 16  
Operation  
Operation  
Gate set to Desired  
Squelch Setting (DSS)  
Setting Squelch  
Squelch is the control gate”for incoming signals.  
Setting Squelch  
Gate closed  
3
To achieve the Desired Squelch Setting (DSS),  
turn the Squelch control counterclockwise  
until you hear noise. Now turn the control  
clockwise just until the noise stops. This is the  
DSS setting.  
1
Full  
clockwise rotation closes the gate  
allowing only very strong signals to enter.  
Gate open  
2
Full  
counterclockwise rotation opens the  
gate”allowing all signals in.  
16  
17  
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 18  
Operation  
Operation  
To Transmit  
RF Meter  
To Transmit  
RF Meter  
This meter swings proportionately to the RF  
output (outgoing signal) while transmitting.  
Caution!  
Be sure the antenna is properly  
connected to the radio before  
transmitting. Prolonged trans-  
mitting without an antenna,or  
a poorly matched antenna,  
could cause damage to the  
transmitter.  
1
Select desired  
channel.  
Be sure to read the F.C.C.Rules  
and Regulations included with  
this unit before transmitting.  
External Speaker  
The external Speaker jack is used for remot e  
receiver monitoring.  
External Speaker  
Transmit  
Transmit  
Note  
The external speaker should  
have 8-ohm impedance and be  
rated to handle at least 4.0  
watts.When the external speak-  
er is plugged in,the internal  
speaker is automatically discon-  
nected.  
Note  
1
Connect an external speaker to the external  
1
Cobra external speakers are  
rated at 10 watts.See  
Accessories page 39.  
Push and hold mic button to transmit.  
Transmitter is now activated.When transmit-  
ting, hold the microphone two inches from  
your mouth and speak in a clear, normal voice.  
Release to receive.  
speaker jack on the rear panel.  
18  
19  
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 20  
Operation  
Operation  
PA (Public Address)  
PA (Public  
Address)  
Note  
Speaker should have 8-ohm  
impedance and be rated to  
handle at least 4.0 watts.  
Note  
The speaker should be directed  
away from the microphone to  
prevent acoustic feedback.  
1
Connect an external PA speaker to the PA jack  
on the rear panel.  
3
Push and hold microphone button and speak  
in a normal voice.Your voice will sound on the  
PA speaker.  
Note  
Activity on the CB channel will  
be heard through the PA speak-  
er. Adjust volume control to a  
normal listening level.  
2
Set CB/ANL PA switch to PA position.  
4
Adjust PA speaker volume with the  
Dynamike control.  
20  
21  
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 22  
Operation  
Operation  
What is Weather Radio  
NOAA Weather Radio (NWR) is a service of the  
What You Should Know About Weather  
Weather Radio  
Weather  
Information  
If threatening weather is nearby, the National  
Weather Service may broadcast a 10 second alert  
tone.This tone will be heard through the CB, even  
if the CB/WX Switch is in the CB mode or the unit  
is turned off.  
National Oceanic and Atmospheric Administration  
(NOAA),of the U.S. Department of Commerce. 380  
NWR stations are in operation by the U.S.  
Government in addition to several NWR stations  
that are maintained by private interest groups.The  
capability is to supplement warnings by sirens and  
by commercial radio and television. The 7 National  
Weather Channels provide full coverage to keep  
you informed of weather conditions, 24 hours a  
day, 7 days a week.  
Note  
This enables you to monitor CB frequencies and  
still be warned by the National Weather Service  
Emergency Alert. When you hear the alert, place  
the CB/WX switch in the WX position. You will  
then be able to hear the Weather Warning  
Broadcast.  
For a list of weather frequencies  
see specification in the  
Frequency Ranges section on  
page 32.  
If you wish to receive a listing of  
NOAA ‘Weather Radio  
Transmitter locations,contact  
your nearest National Weather.  
Operating Weather Channel Selector  
You can completely disable the Emergency  
Weather Alert feature by turning the Weather  
Channel Selector to the off position.  
Weather  
Channels  
Your 25 WX NW ST has a special auto squelch cir-  
cuit for weather transmission which disables your  
squelch control.  
Service Office, or write to:  
NationalWeather Service  
(Attn:W/OM11) NOAA  
Silver Springs, MD 20910.  
If you are using the CB mode, remember to  
change the CB/WX Switch from CB to WX every so  
often to make sure you are continually tuned to  
the clearest/closest weather band channel in case  
an alert is broadcast.  
For ideal weather reception use  
a dual band antenna (center  
load/baseload).  
When CB/WX is on WX position Weather Receiver  
is activated.  
1
Place CB/WX Switch in the WX position.  
2
Turn the Weather Channel Selector (1-7) until  
you find the Weather Channel with the clear-  
est reception. Sometimes more than one  
channel can be received, however, the closest  
broadcast to you will be the one with the  
clearest signal.  
23  
22  
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 24  
Home And Office Setup  
Temporary Mobile Set-Up  
Base Station Operation  
(From 120V AC House Current)  
To operate your transceiver from home or office  
you will need a 13.8 volt DC Power Pack rated at a  
minimum of 2 amps, and a properly installed base  
station antenna.  
Base Station  
Operation  
(From 120V AC  
House Current)  
2
3
Plug power cable into back of unit marked  
“Power. Be sure to observe polarity markings.  
Warning!  
Connect properly installed and matched base  
station antenna.  
Do not attempt to operate this  
transceiver by connecting it  
directly to 120 vac.  
Temporary  
Mobile Set-Up  
Temporary Mobile Operation  
Note  
For temporary mobile operation you may want to  
purchase an optional cigarette lighter adapter  
from your COBRA dealer.This adapter and a mag-  
netic mount antenna allow you to quickly“install”  
your transceiver for temporary use.  
For further information call  
Cobra Customer Service  
1.773.889.3087.  
1
Simply connect the red (+) and black (-)  
leads of the transceiver to the corresponding  
terminals of the p ower pack.  
25  
24  
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 26  
How Your CB Can Serve You  
Warn of traffic problems  
The FCC gives these examples of permitted and  
prohibited messages for channel 9. These are  
only guidelines and not all-inclusive:  
• Provide weather and road data  
• Provide help in event of an emergency  
• Provide direct contact with home or office  
Assist police by reporting erratic drivers  
• Get local information”to find destination  
Communicate with family and friends  
• Suggest spots to eat and sleep  
Permitted Example Message  
Yes  
Tornado sighted six miles north  
of town.”  
Keep you alert while traveling  
No  
“Post number 10.  
A Few Rules You Should Know  
No tornado sighted.”  
A Few Rules  
You Should  
Know  
A. Conversations cannot last more than 5 minutes  
with another station. A one minute break is  
required to let others use the channel.  
Yes  
“Out of gas on I-95 at mile  
marker 211.”  
B. You cannot blast others off the air by use of  
illegally amplified transmitters or illegally  
high antennas.  
C. You cannot use CB to promote illegal activities.  
D. Profanity is not allowed.  
No  
“Out of gas in my driveway.”  
Yes  
“Four car accident on I-94 at  
Exit 11. Send police and  
ambulance.”  
E. You may not transmit music with a CB.  
No  
Traffic moving smoothly on I-94.”  
F. Selling of merchandise and/or services is  
prohibited.  
Yes  
“Weather Bureau has issued  
thunderstorm warning.  
Bring sailboat into port.”  
1. Set to channel 9 for emergencies  
Channel 9  
Emergency  
Messages  
Be sure antenna is properly connected.  
No  
“Attention motorists.  
Weather Bureau advises snow  
tomorrow will accumulate  
4 to 6 inches.”  
2. CB Distress Data  
When transmitting an emergency, you should  
request a REACT BASE”and provide the CB  
distress data (called CLIP):  
Note  
Yes  
No  
“Fire in building at 539 Main,  
Evanston.”  
C all Sign Identify yourself.  
If no response on channel 9,  
try channels 19 or 14.  
L ocation Be exact.  
“Halloween patrol number 3.  
All quiet.”  
I njuries Number.Type.Trapped?  
P roblem Give details and help needed.  
Transmit CLIP repeatedly so any monitor can assist.  
27  
26  
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 28  
How Your CB Can Serve You  
How Your CB Can Serve You  
Code Meaning  
CB 10-Codes  
CB 10-Codes  
10-29 Time is up for contact  
10-30 Does not conform to FCC rules  
10-33 Emergency traffic  
Citizen Bands have adopted the 10-CODESfor  
standard questions and answers. These codes  
provide quick and easy communication,especially  
in noisy areas. Following are some of the more  
common codes and meanings:  
10-34 Trouble at this station  
10-35 Confidential information  
10-36 Correct time is  
Code Meaning  
10-37 Wrecker needed at  
10-38 Ambulance needed  
10-39 Message delivered  
10-1  
10-2  
10-3  
10-4  
10-5  
10-6  
10-7  
10-8  
10-9  
Receiving poorly  
Receiving well  
Stop transmitting  
OK,message received  
Relay message  
10-41 Turn to channel  
10-42 Traffic accident at  
10-43 Traffic tie up at  
Busy, stand by  
10-44 Have a message for  
10-45 All units within range please report  
10-50 Break channel  
Out of service, leaving  
In service, subject to call  
Repeat message  
10-60 What is next message number?  
10-62 Unable to copy.Use phone  
10-63 Net directed to  
10-10 Transmission completed standing by  
10-11 Talking too rapidly  
10-12 Visitors present  
10-64 Net clear  
10-13 Advise weather/roads  
10-16 Make pick up at  
10-65 Awaiting your next message/assignment  
10-67 All units comply  
10-17 Urgent business  
10-18 Anything for us?  
10-19 Return to base  
10-70 Fire at  
10-71 Proceed, transmission in sequence  
10-77 Negative contact  
10-20 My location is  
10-81 Reserve hotel room for  
10-82 Reserve room for  
10-21 Call by phone  
10-22 Report in person to  
10-23 Stand by  
10-85 My address is  
10-91 Talk closer to mic  
10-24 Completed last assignment  
10-25 Can you contact  
10-26 Disregard last info  
10-27 Moving to channel  
10-28 Identify your station  
10-93 Check my frequency on this channel  
10-94 Give me a long count  
10-99 Mission completed, all units secure  
10-200 Police needed at  
28  
29  
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 30  
Frequency Ranges  
25 WX NW ST Specifications  
GENERAL  
The COBRA 25 WX NW ST transceiver represents  
CHANNELS . . . . . . . . . . . . . . . . . . . . . . . CB - 40 CH  
FREQUENCY RANGE. . . . . . . . . . . . . . . CB - 26.965 TO 27.405 MHZ  
WX - 162.400 TO 162.550 MHZ  
FREQUENCY TOLERANCE . . . . . . . . . . 0.005 %  
FREQUENCY CONTROL . . . . . . . . . . . . PLL (PHASE LOCK LOOP) SYNTHESIZER  
OPERATING TEMPERATURE  
one of the most advanced AM two-way radios used  
as a Class D station in the Citizens Radio Service.  
This unit features advanced Phase Lock Loop (PLL)  
circuitry providing complete coverage of all 40 CB  
channels.  
RANGE. . . . . . . . . . . . . . . . . . . . . . . . . . . -30° C TO + 50° C  
MICROPHONE . . . . . . . . . . . . . . . . . . . . PLUG-IN DYNAMIC  
INPUT VOLTAGE . . . . . . . . . . . . . . . . . . 13.8VDC nom.(positive or negative ground)  
CURRENT DRAIN  
TRANSMIT: AM FULL MOD.,1.5A (MAXIMUM)  
RECEIVE:SQUELCHED, 0.3A;  
FULL AUDIO OUTPUT, 1.2A (NOMINAL)  
Channel  
Freq.  
Channel In MHz  
Channel  
Freq.  
Channel In MHz  
Weather  
Weather Freq.  
Channel In MHz.  
SIZE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-5/8D X 6-3/8W X 2-13/64”H  
WEIGHT . . . . . . . . . . . . . . . . . . . . . . . . . .4 LBS.  
ANTENNA CONNECTOR . . . . . . . . . . . .UHF; SO-239  
METER . . . . . . . . . . . . . . . . . . . . . . . . . . .ILLUMINATED;INDICATES RELATIVE  
POWER OUTPUT AND RECEIVED  
CB  
CB  
SIGNAL STRENGTH  
1
2
3
4
5
26.965 21  
26.975 22  
26.985 23  
27.005 24  
27.015 25  
27.215  
1
2
3
4
5
6
7
162.400  
TRANSMITTER  
27.225  
27.255  
27.235  
27.245  
162.425  
162.450  
162.475  
162.500  
162.525  
162.550  
POWER OUTPUT . . . . . . . . . . . . . . . . . .4 WATTS  
MODULATION . . . . . . . . . . . . . . . . . . . .AM (AMPLITUDE MODULATION)  
FREQUENCY RESPONSE . . . . . . . . . . . .300 TO 3000 HZ  
OUTPUT IMPEDANCE . . . . . . . . . . . . . .50 OHMS,UNBALANCED  
RECEIVER  
SENSITIVITY . . . . . . . . . . . . . . . . . . . . . . .LESS THAN 1 µV FOR 10 dB (S+N) /N  
SELECTIVITY . . . . . . . . . . . . . . . . . . . . . .6 DB @ 7 KHZ,60 dB @ 10KHZ  
IMAGE REJECTION . . . . . . . . . . . . . . . . .80 dB,TYPICAL  
ADJACENT-CHANNEL REJECTION . . .60 dB,TYPICAL  
IF FREQUENCIES . . . . . . . . . . . . . . . . . .DOUBLE CONVERSION:1ST: 10.695 MHZ  
2ND:455 KHZ  
6
7
8
9
27.025 26  
27.035 27  
27.055 28  
27.065 29  
27.075 30  
27.265  
27.275  
27.285  
27.295  
27.305  
AUTOMATIC GAIN CONTROL (AGC) .LESS THAN 10 dB CHANGE IN AUDIO  
OUTPUT FOR INPUTS FROM 10 TO 50,000  
MICROVOLTS  
RF GAIN RANGE . . . . . . . . . . . . . . . . . . .40 dB  
NOISE BLANKER . . . . . . . . . . . . . . . . . . .RF TYPE  
SQUELCH . . . . . . . . . . . . . . . . . . . . . . . . .ADJUSTABLET; HRESHOLD LESSTHAN 1µV  
AUDIO OUTPUT POWER . . . . . . . . . . .4 WATTS  
10  
FREQUENCY RESPONSE . . . . . . . . . . . .300 TO 3000 HZ  
DISTORTION . . . . . . . . . . . . . . . . . . . . . .LESS THAN 7% @3 WATTS @ 1000 HZ  
BUILT-IN SPEAKER . . . . . . . . . . . . . . . . .8 OHMS,5W  
EXTERNAL SPEAKER (NOT SUPPLIED) 8 OHMS; DISABLES INTERNAL SPEAKER  
WHEN CONNECTED  
11  
12  
13  
14  
15  
27.085 31  
27.105 32  
27.115 33  
27.125 34  
27.135 35  
27.315  
27.325  
27.335  
27.345  
27.355  
PA SYSTEM  
POWER OUTPUT . . . . . . . . . . . . . . . . . .4 WATTS INTO EXTERNAL SPEAKER  
EXTERNAL SPEAKER FOR PA . . . . . . . .8 OHMS, 4 WATTS MIN.  
(NOT SUPPLIED) . . . . . . . . . . . . . . . . . .THE PA SPEAKER ALSO MONITORS THE  
RECEIVER;SEPARATE JACK PROVIDED  
16  
17  
18  
19  
20  
27.155 36  
27.165 37  
27.175 38  
27.185 39  
27.205 40  
27.365  
27.375  
27.385  
27.395  
27.405  
Weather  
SENSITIVITY . . . . . . . . . . . . . . . . . . . . . . .LESS THAN 1 uV FOR 12 dB SINAD  
IF FREQUENCY . . . . . . . . . . . . . . . . . . . .DUAL CONVERSION  
1st: - 10.690 MHz  
2nd: - 455 KHz  
AUDIO OUTPUT . . . . . . . . . . . . . . . . . . .MAXIMUM 500 mW AT 10% DISTORTION  
FREQUENCY RESPONSE . . . . . . . . . . . .300 - 3000 HZ AT -6dB  
(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)  
30  
31  
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 32  
Limited Two Year Warranty  
Optional Accessories  
COBRA ELECTRONICS CORPORATION warrants that its  
COBRA CB Radios, and the component parts thereof, will  
be free of defects in workmanship and materials for period  
of two (2) years from the date of first consumer purchase.  
This warranty may be enforced by the first consumer  
purchaser, provided that the product is utilized within  
the U.S.A.  
COBRA will,without charge, repair or replace, at its option,  
defective CB radios, products or component parts upon  
delivery to the COBRA factory Service Department, accom-  
panied by proof of the date of first consumer purchase,  
such as a duplicated copy of a sales receipt.  
Replacement Mounting  
Bracket  
Replacement Thumb Screws  
Replacement DC Power Cord  
For in vehicle use  
For in vehicle use  
For in vehicle use  
251-199-9-001  
634-081-9-001  
$0.60  
426-002-N-001  
$7.50  
Cobra Electronics  
Corporation  
$4.50  
6500 West Cortland Street  
Chicago, Illinois 60707  
You must pay any initial shipping charges required to ship  
the product for warranty service, but the return charges  
will be at Cobra's expense, if the product is repaired or  
replaced under warranty.  
Exclusions: This limited warranty does not apply; 1) to any  
product damaged by accident;2) in the event of misuse or  
abuse of the product or as a result of unauthorized alter-  
ations or repairs;3) if the serial number has been altered,  
defaced or removed;4) if the owner of the product resides  
outside the U.S.A.  
Replacement Microphone  
Bracket  
28”Full Range Center Load,  
Magnetic Mount Antenna  
25”Glass Mount Antenna  
For in vehicle use  
For in vehicle use  
For in vehicle use  
AT 55  
$27.95  
741-080-9-001  
$0.45  
AT 35  
$19.95  
All implied warranties, including warranties of  
merchantability and fitness for a particular pur pose  
are limited in duration to the length of this war ranty.  
COBRA shall not be liable for any incidental, conse-  
quential or other damages;including, without limita-  
tion, damages resulting from loss of use or cost of instal-  
lation.  
Some states do not allow limitations on how long an  
implied warranty lasts and/or do not allow the exclu-  
sion or limitation of incidental or consequential dam -  
ages, so the ab ove limitations may not apply to you.  
39” Full Range Base Load,  
Magnetic Mount Antenna  
44”Full Range, Center Load,  
Dual Band CB/WX Antenna  
Replacement Dynamic  
Microphone  
For in vehicle use  
Allows greater transmission  
For in vehicle use  
AT 70  
$24.95  
range while in a moving vehicle. CA 73  
$12.95  
ATW-400  
$27.95  
32  
33  
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 34  
Accessory Order Form  
Description  
Optional Accessories  
Item #  
Cost Ea. Qty. Amount  
426-002-N-001 Replacement DC Power Cord  
251-199-9-001 Replacement Mounting Bracket  
634-081-9-001 Replacement Thumb Screws  
$7.50  
$4.50  
$0.60  
741-080-9-001 Replacement Microphone Bracket $0.45  
AT 35  
28” Full Range Center Load,  
Magnetic Mount Antenna  
25” Glass Mount Antenna  
39”Full Range Base Load,  
Magnetic Mount Antenna  
44”Full Range, Center Load,  
Dual Band CB/WX Antenna  
Replacement Dynamic Microphone  
Power Microphone  
$19.95  
$27.95  
AT 55  
AT 70  
$24.95  
Power Microphone  
Noise Canceling/Power  
Microphone  
Echo/Noise Canceling  
Microphone  
ATW 400  
For in vehicle use  
CA 75  
$27.95  
$12.95  
$21.95  
$24.95  
$21.95  
For in vehicle use  
CA 79  
For in vehicle use  
CA 77  
CA 73  
CA 75  
CA 77  
CA79  
$59.95  
$24.95  
Noise Canceling/Power Microphone  
Echo/Noise Canceling Microphone $59.95  
CS 100  
CS 300  
CS 500  
Dynamic External Speaker  
$14.95  
$19.95  
Noise Canceling External Speaker  
Dynamic Noise Canceling  
Shipping & Handling  
Amount of  
Order  
Shipping/  
Handling  
With Talk Back External Speaker  
$24.95  
$25.00 and under $4.75 minimum  
Subtotal  
Prices subject to change without notice.  
$25.01-$40.00  
$40.01-$80.00  
$80.01-$120.00  
$6.95  
$9.25  
$10.25  
Tax Table  
Dynamic External Speaker  
Noise Canceling External  
Speaker  
Dynamic Noise Canceling  
With Talk Back External  
Speaker  
(Tax if applicable)  
Shipping/handling  
Total  
Illinois residents add 7%  
Michigan residents add 4 %  
Cook Co.residents add .75% (7.75% total) Ohio residents add 6%  
For in vehicle use  
Chicago residents add 1% (8.75% total)  
Indiana residents add 5%  
Wisconsin residents add 5%  
CS 100  
$14.95  
For in vehicle use  
$120.01-$160.00 $11.75  
$160.01 and up $14.50  
For AK,HI and PR please add  
an additional $15.00 for UPS  
shipments.  
CS 300  
$19.95  
For in vehicle use  
For credit card orders fill out order form  
and fax to: 1.773.622.2269  
or call 1.773.889.3087  
8:00 am - 8:00 pm,M-F, CST.  
Make check or money order (no stamps)  
payable to:  
Cobra Accessories Dept.  
6500West Cortland St.Chicago, IL 60707  
CS 500  
$24.95  
(Press 1 from the main menu)  
Please print clearly  
Name  
You Can Find These Fine Accessories At Your Local  
Cobra CB Dealer  
If you wish, you can order directly from Cobra.  
Address (No P.O. Box)  
City  
Zip  
State  
Order by phone  
Call 1.773.889.3087  
(Press 1 from the main menu) 8 a.m.-8 p.m. M-F CST.  
Telephone (  
)
Credit Card No.  
Exp. Date  
Order by mail or fax  
Please fill out order form on ne xt page, and mail/fax directly  
to Cobra.  
Customer Signature  
Circle One: Visa MasterCard Discover  
Allow 4 to 6 weeks for delivery. Offer valid in Continental U.S.only.  
34  
35  
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 36  
Notes  
Notes  
Notes  
Notes  
36  
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 38  
25 WX NW ST  
Cobra Electronics Corporation  
6500 West Cortland Street  
Chicago, IL60707  
Operating Instructions  
for your Cobra 25 WX NW ST  
If You Think You Need Service  
For technicalassistance,please call our Automated Help Desk which can assist  
you by answering the most frequentlyasked questions about Cobra products.  
CB Radio  
(773) 889-3087  
24 hours a da y, 7 days a week.  
A Consumer Service Representative can be reached through this same number 8:00 am - 8:00  
pm,Monday through Friday, CST.  
Technical assistance is also a vailable on-line in the Frequently Asked Questions (FAQ) section at  
If you think you need service call 1.773.889.3087  
“If your product should require factory service please call Cobra first before sending your unit in.  
This will ensure the fastest turn-around time on your repair.”  
You may be asked to send your unit to the Cobra factory. It will be necessary to furnish the follo w-  
ing in order to have the product serviced and returned.  
1. For Warranty Repair include some form of proof-of-purchase, such as a mechanical reproduction  
or carbon or a sales receipt. If you send the original receipt it cannot be returned.  
2. Send the entire product.  
3. Enclose a description of what is happening with the unit.Include a typed or clearly print name  
and address of where the unit is to be returned .  
4. Pack unit securely to prevent damage in transit. If possible, use the original packing material.  
5. Ship prepaid and insured by way of a traceable carrier such as United Parcel Service (UPS) or First  
Class Mail: to avoid loss in transit to: Cobra Factory Service,Cobra Electronics Corporation,6500  
W. Cortland St., Chicago, IL 60707.  
6. If the unit is in warranty, upon receipt of your unit it will either be repaired or exchanged  
depending on the model. Please allow approximately 3 to 4 weeks before contacting us for  
status. If the unit is out of warranty a letter will automatically be sent informing you of the  
repair charge or replacement charge. If you have any questions, please call 1.773.889.3087 for  
assistance.  
Cobra Electronics Corp.© 1999  
Printed in China  
Part No. 480-291-P-001  
“Ingenious Products for Easier Communication.”  
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 40  
The CB Story  
The Citizens Band lies between the shortwave  
broadcast and 10-meter Amateur radio bands,  
and was established by law in 1949. The Class D  
two-way communications service was opened in  
1959.(CB also includes a Class A citizens band  
and Class C remote control frequencies.)  
2
FCC Regulations  
1
FCC regulations permit only transmissions”  
(one party to another) rather than broadcasts”  
(to a wide audience). Thus, advertising is not  
allowed on CB Channels because that is broad-  
casting.”  
FCC Warnings  
All transmitter adjustments other than those  
supplied by the manufacturer as front panel  
operating controls, must be made by, or under  
the supervision of, the holder of an FCC-issued  
General Radio-Telephone Operators License.  
4
Replacement or substitution of transistors, regular  
diodes or other parts of a unique nature, with  
parts other than those recommended by Cobra,  
may cause violation of the technical regulations  
of Part 95 of the FCC Rules, or violation of Type  
Acceptance requirements of Part 2 of the Rules.  
You should read and understand Part 95 (included  
with this unit) of the FCC Rules and Regulations,  
before operating your Cobra radio, even though  
the FCC no longer requires you to obtain an oper-  
ators license.  
Whats Included with Your 25 WX NW ST  
1. CB transceiver  
2. Microphone  
6. DC power cord  
7. FCC rules  
5
3. Transceiver bracket  
4. Microphone bracket  
5. Operating Manual  
1. (not pictured)  
A1  
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25 WX NW ST Manual 3.3 6/15/99 1:10 PM Page 41  
Controls and Indicators  
Our Thanks to You  
Thank you for purchasing the Cobra 25 WX NW ST  
CB Radio. Properly used, this Cobra product will  
give you many years of reliable service.  
1. 4-Pin MicrophoneConnector  
2. Power On/Off/Volume  
3. Squelch  
Cobra Customer Service  
16  
Live operators are available  
M-F 8:00 am - 8:00 pm CST at:  
773.889.3087  
TM  
SoundTracker  
4. DIM/Dynamike  
“Cuts noise coming in...strengthens signals  
going out.”  
5. Weather Channel Selector  
6. Channel Selector  
Automated Technical Assistance  
available 24 hours a day, seven  
days a week.E-mail questions  
to:  
This Patent pending technology dramatically  
improves transmission and reception of CB  
signals.  
7. LED Channel Display  
8. Sound Tracker™ LED  
9. RX (Receive)/ TX (Transmit)  
productinfo@cobraelec.com  
TM  
/WX Weather LED Indicator  
The revolutionary SoundTracker System recon-  
figures the transmission signal which allows it to  
be transferred more efficiently through cluttered  
airwaves.  
Cobra on the World Wide Web:  
Frequently Asked Questions  
(FAQ) can be found on-line at:  
10. Sound Tracker™ On/Off  
11. Channel 19/Channel 9/  
Normal Switch  
11  
9
13 12  
14  
8
12. CB/Weather Switch  
13. NB/Off Switch  
At the same time, it significantly reduces the  
amount of static on all incoming CB signals.  
7
15  
10  
14. CB/ANL PA Switch  
15. Signal Strength Meter  
16. Microphone  
The end result is a cleaner, clearer sounding  
reception of signals and a more powerful  
transmission which dramatically improves  
CB communications.  
1
2
3
4
5
6
Back Side  
17. Public Address Speaker Jack  
18. External Speaker Jack  
19. Antenna Connector  
20. Power Jack  
Customer Support  
17 18  
Should you encounter any problems with the  
product or not understand its many features,  
please refer to this owners manual. If ,after  
referring to the manual, you still need help,  
call Cobra Customer Service at 773.889.3087.  
19  
20  
A2  
A3  
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