Cobra 25nwst Cb Tranciever Manual

							Set     CB PA switch to PA position.22120OperationOperation
External SpeakerExternal Speaker
The external Speaker jack is used for remote
receiver monitoring.
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
Cobra external speakers are
rated at 10 watts. See 
accessories page 37.Connect an external speaker to the external
speaker jack on the rear panel.1PA (Public
Address)PA (Public Address)
Connect an external PA speaker to the PA jack
on the rear panel.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.
Note
Activity on the CB channel 
will be heard through the PA
speaker. Adjust Volume Control
for normal listening level.125 NWST Manual3.3  6/15/99 12:43 PM  Page 20 
						

							Operation Operation2322Push and holdmicrophone button and speak
in a normal voice. Your voice will sound on the
PA speaker.
AdjustPA speaker volume with the 
Dynamike control.34
ANL (Automatic
Noise Limiter)
SwitchANL (Automatic Noise Limiter) Switch
When switchedto     ANL the Automatic Noise
Limiter is activated. This helps reduce noise
created by the vehicle’s electronics.1
When switchedtoNB position the RF Noise
Blanker is activated,providing increased noise
filtration.
When switched to     OFF position Noise
Blanking Filtration will be turned off.
NB, OFF 
(Noise Blanker)
Switch Note
The RF noise blanker is very
effective in reducing repetitive
noises such as ignition interfer-
ence. NB,OFF (Noise Blanker) Switch 25 NWST Manual3.3  6/15/99 12:43 PM  Page 22 
						

							Home And Office Set-Up Temporary Mobile Set-Up2524
Temporary
Mobile Set-UpTemporary Mobile Operation
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.Base Station
Operation
(From 120V AC
House Current)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.
Warning! 
Do not attempt to operate this
transceiver by connecting it
directly to 120 vac.
Note
For further information call
Cobra Customer Service
1.773.889.3087.1Simply connect the red (+) and black (-) 
leads of the transceiver to the corresponding
terminals of the power pack.25 NWST Manual3.3  6/15/99 12:43 PM  Page 24 
						

							How Your CB Can Serve You27Home And Office Set-Up26Connect properly installed and matched base
station antenna. Plug power cable into back of unit marked
“Power”. Be sure to observe polarity markings.231.Set to channel 9 for emergencies
Be sure antenna is properly connected.
2.CB Distress Data
When transmitting an emergency, you should
request a “REACT BASE”and provide the CB 
distress data (called CLIP):
Call SignIdentify yourself.
LocationBe exact.
InjuriesNumber. Type. Trapped?
ProblemGive details and help needed.
Transmit C L I Pre pe atedly so any monitor can assist.
Channel 9
Emergency
MessagesNote
If no response on channel 9,
try channels 19 or 14.• Warn of traffic problems
• 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
•Keep you alert while traveling
A Few Rules You Should Know
A.Co nve r s ations cannot last more than 5 minute s
with another station.A one minute break is
required to let others use the channel.
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.
E. You may not transmit music with a CB.
F. Selling of merchandise and/or services is               
prohibited.
A Few Rules 
You Should 
Know25 NWST Manual3.3  6/15/99 12:43 PM  Page 26 
						

							How Your CB Can Serve You How Your CB Can Serve You2928The FCC gives these examples of permitted and
prohibited messages for channel 9.These are
only guidelines and not all-inclusive:
Permitted      Example Message
Yes“Tornado sighted six miles north 
of town.”
No“Post number 10.
No tornado sighted.”
Yes“Out of gas on I-95 at mile 
marker 211.”
No “Out of gas in my driveway.”
Yes“Four car accident on I-94 at
Exit 11.Send police and 
ambulance.”
No “Traffic moving smoothly on I-94.”
Yes“Weather Bureau has issued 
thunderstorm warning.
Bring sailboat into port.”
No “Attention motorists.
Weather Bureau advises snow
tomorrow will accumulate
4 to 6 inches.”
Yes“Fire in building at 539 Main,
Evanston.”
No“Halloween patrol number 3.
All quiet.”CB 10-Codes
Citizen Bands have adopted the “10-CODES” for
standard questions and answers. These codes
p rovide quick and easy co m m u n i cat i o n ,e s pe c i a l l y
in noisy areas. Following are some of the more
common codes and meanings:
CodeMeaning           
10-1     Receiving poorly
10-2     Receiving well
10-3     Stop transmitting
10-4     OK,message received
10-5     Relay message
10-6     Busy,stand by
10-7     Out of service,leaving
10-8     In service,subject to call
10-9     Repeat message
10-10     Transmission completed standing by
10-11     Talking too rapidly
10-12     Visitors present
10-13     Advise weather/roads 
10-16     Make pick up at
10-17     Urgent business
10-18     Anything for us?
10-19     Return to base
10-20     My location is
10-21     Call by phone
10-22 Report in person to
10-23     Stand by
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
CB 10-Codes25 NWST Manual3.3  6/15/99 12:43 PM  Page 28 
						

							Frequency Ranges How Your CB Can Serve You3130CodeMeaning   
10-29Time is up for contact
10-30 Does not conform to FCC rules
10-33     Emergency traffic   
10-34Trouble at this station
10-35     Confidential information
10-36     Correct time is
10-37     Wrecker needed at
10-38     Ambulance needed
10-39     Message delivered
10-41     Turn to channel
10-42     Traffic accident at
10-43     Traffic tie up at
10-44     Have a message for
10-45     All units within range please report
10-50     Break channel
10-60     What is next  message number?
10-62     Unable to copy. Use phone
10-63    Net directed to
10-64     Net clear
10-65     Awaiting your next message/assignment
10-67     All units comply
10-70     Fire at
10-71     Proceed,transmission in sequence
10-77    Negative contact
10-81Reserve hotel room for
10-82Reserve room for
10-85My address is
10-91Talk closer to mic
10-93     Check my frequency on this channel
10-94Give me a long count
10-99     Mission completed,all units secure
10-200Police needed atThe COBRA 25 NW ST transceiver represents 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.
126.9652127.215
226.9752227.225
326.9852327.255
427.0052427.235
527.0152527.245
627.0252627.265
727.0352727.275
827.0552827.285
927.0652927.295
1027.0753027.305
1127.0853127.315
1227.1053227.325
1327.1153327.335
1427.1253427.345
1527.1353527.355
1627.1553627.365
1727.1653727.375
1827.1753827.385
1927.1853927.395
2027.2054027.405
Channel Channel
CBFreq.CB Freq.
ChannelIn MHzChannelIn MHz25 NWST Manual3.3  6/15/99 12:43 PM  Page 30 
						

							Limited Two Year Warranty 25 NWST Specifications3332GENERAL
CHANNELS. . . . . . . . . . . . . . . . . . . . . . . CB - 40 CH 
FREQUENCY RANGE. . . . . . . . . . . . . . . CB - 26.965 TO 27.405 MHZ
FREQUENCY TOLERANCE. . . . . . . . . . 0.005 %
FREQUENCY CONTROL . . . . . . . . . . . . PLL (PHASE LOCK LOOP) SYNTHESIZER
OPERATING TEMPERATURE 
RANGE. . . . . . . . . . . . . . . . . . . . . . . . . . . -30° C TO + 50° C
MICROPHONE. . . . . . . . . . . . . . . . . . . . PLUG-IN DYNAMIC
INPUT VOLTAGE . . . . . . . . . . . . . . . . . . 13.8VDC nom.(positive or negative ground) 
CURRENT DRAINTRANSMIT:AM FULL MOD.,1.5A (MAXIMUM)
RECEIVE:SQUELCHED,0.3A;
FULL AUDIO OUTPUT,1.2A (NOMINAL)
SIZE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-5/8”D X 6-3/8”W X 2-13/64”H
WEIGHT . . . . . . . . . . . . . . . . . . . . . . . . . .4 LBS.
ANTENNA CONNECTOR . . . . . . . . . . . .UHF;SO-239
METER . . . . . . . . . . . . . . . . . . . . . . . . . . .ILLUMINATED;INDICATES RELATIVE
POWER OUTPUT AND RECEIVED 
SIGNAL STRENGTH
TRANSMITTER
POWER OUTPUT . . . . . . . . . . . . . . . . . .4 WAT TS
MODULATION . . . . . . . . . . . . . . . . . . . .AM (AMPLITUDE MODULATION)
FREQUENCY RESPONSE . . . . . . . . . . . .300 TO 3000 HZ
OUTPUT IMPEDANCE . . . . . . . . . . . . . .50 OHMS,UNBALANCED
RECEIVER
SENSITIVITY . . . . . . . . . . . . . . . . . . . . . . .LESS THAN 1  µV FOR 10dB(S+N) /N
SELECTIVITY . . . . . . . . . . . . . . . . . . . . . .6dB@ 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
AUTOMATIC GAIN CONTROL (AGC) .LESS THAN 10 dBCHANGE IN AUDIO
OUTPUT FOR INPUTS FROM 10 TO 50,000 
MICROVOLTS
RF GAIN RANGE . . . . . . . . . . . . . . . . . . .40 dB
NOISE BLANKER . . . . . . . . . . . . . . . . . . .RF TYPE
SQUELCH . . . . . . . . . . . . . . . . . . . . . . . . .A D J U S TA B L E ;THRESHOLD LESS THAN 1µV
AUDIO OUTPUT POWER . . . . . . . . . . .4 WATTS
FREQUENCY RESPONSE . . . . . . . . . . . .300 TO 3000 HZ
DISTORTION . . . . . . . . . . . . . . . . . . . . . .LESS THAN 7% @3 WATTS @ 1000 HZ
BUILT-IN SPEAKER . . . . . . . . . . . . . . . . .8 OHMS,5W
E XTERNAL SPEAKER (NOT SUPPLIED) 8 OHMS; DISABLES INTERNAL SPEAKER 
WHEN CONNECTED
PA SYSTEM
POWER OUTPUT . . . . . . . . . . . . . . . . . .4 WATTS INTO EXTERNAL SPEAKER
EXTERNAL SPEAKER FOR PA . . . . . . . .8 OHMS,4 W.MIN.
(NOT  SUPPLIED) . . . . . . . . . . . . . . . . . .THE PA SPEAKER ALSO MONITORS THE 
RECEIVER;SEPARATE JACK PROVIDED
(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)COBRA ELECTRONICS CORPORATIONwarrants 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.
You must pay any initial shipping charges required to ship
the product for warranty service,but the return charges
will be at Cobras 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.
All implied warranties,including warranties of 
merchantability and fitness for a particular purpose 
are limited in duration to the length of this warranty.
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-
l at i o n .
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 above limitations may not apply to you.Cobra Electronics
Corporation
6500 West Cortland Street
Chicago,Illinois 6070725 NWST Manual3.3  6/15/99 12:43 PM  Page 32 
						

							You Can Find These Fine Accessories At Your Local 
Cobra CB Dealer
If you wish,you can order directly from Cobra.
Order by phone
Call 1.773.889.3087 
(Press 1 from the main menu) 8 a.m.-8 p.m.M-F CST.
Order by mail or fax
Please fill out order form on next page,and mail/fax directly 
to Cobra.Optional Accessories Optional Accessories3534Dynamic External Speaker
For in vehicle use
CS 100$14.95Noise Canceling External
Speaker
For in vehicle use
CS 300$19.95Dynamic Noise Canceling
With Talk Back External
Speaker
For in vehicle use
CS 500$24.95 Power Microphone 
For in vehicle use
CA 75$21.95Noise Canceling/Power
Microphone
For in vehicle use
CA 77$24.95Echo/Noise Canceling
Microphone
For in vehicle use
CA 79$59.95Replacement DC Power Cord
For in vehicle use
426-002-N-001$7.50Replacement Mounting
Bracket
For in vehicle use
251-199-9-001$4.50Replacement Thumb Screws
For in vehicle use
634-081-9-001$0.60
Replacement Microphone
Bracket
For in vehicle use
741-080-9-001$0.4528”Full Range Center Load,
Magnetic Mount Antenna
For in vehicle use
AT 35$19.9525”Glass Mount Antenna
For in vehicle use
AT 55$27.95
39”Full Range Base Load,
Magnetic Mount Antenna
For in vehicle use
AT 70$24.9544”Full Range, Center Load,
Dual Band CB/WX Antenna
Allows greater transmission
range while in a moving vehicle.
ATW- 4 0 0$ 2 7 . 9 5Replacement Dynamic
Microphone
For in vehicle use
CA 73$12.9525 NWST Manual3.3  6/15/99 12:43 PM  Page 34 
						

							Accessory Order Form36
Tax Table
Illinois residents add 7%
Cook Co. residents add .75% (7.75% total)
Chicago residents add 1% (8.75% total)
Indiana residents add 5%
For credit card orders fill out order form
and fax to:1.773.622.2269
or call 1.773.889.3087
(Press 1 from the main menu)8:00 am - 8:00 pm,M-F,CST.
Ma ke check  or money order (no stamp s)
payable to:
Cobra Accessories Dept.
6500 West Co rtland  St .Ch i ca g o, IL 60707Prices subject to change without notice.Please print clearly
Name
Address (No P.O. Box)
CityState
Zip
Telephone (       )
Credit Card No.Exp. Date
Customer Signature
Circle One:Visa    MasterCard    Discover
Allow 4 to 6 weeks for delivery. Offer valid in Continental U.S.only.
Subtotal
( Tax if applicable)  
Shipping/handling
Total 
Item #DescriptionCost Ea.Qty. Amount
4 2 6 - 0 0 2 - N - 0 0 1Re p l a ce m e nt DC Power Co rd$ 7 . 5 0
2 5 1 - 1 9 9 - 9 - 0 0 1Re p l a ce m e nt Mo u nting  Bra c ke t$ 4 . 5 0
634-081-9-001Replacement Thumb Screws$0.60
741-080-9-001Replacement Microphone Bracket$0.45
AT 3528”Full Range Center Load,
Magnetic Mount Antenna$19.95
AT 5525”Glass Mount Antenna$27.95
AT 7039”Full Range Base Load,
Magnetic Mount Antenna$24.95
ATW 40044”Full Range, Center Load,
Dual Band CB/WX Antenna$27.95
CA 73
Replacement Dynamic Microphone$12.95
CA 75Power Microphone$21.95
CA 77
Noise Canceling/Power Microphone$24.95
CA79Echo/Noise Canceling Microphone$59.95
CS 100Dynamic External Speaker$14.95
CS 300Noise Canceling External Speaker$19.95
CS 500Dynamic Noise Canceling 
With Talk Back External Speaker$24.95
Michigan residents add 4 % 
Ohio residents add 6%
Wisconsin residents add 5%Shipping & Handling
Amount of Shipping/
OrderHandling
$25.00 and under$4.75 minimum
$25.01-$40.00$6.95 
$40.01-$80.00$9.25
$80.01-$120.00$10.25
$120.01-$160.00$11.75
$160.01 and up$14.50For AK,HI and PR please add
an additional $15.00 for UPS
shipments.25 NWST Manual3.3  6/15/99 12:43 PM  Page 36 
						

							25 NW STCobra Electronics Corporation
6500 West Cortland Street
Chicago, IL60707
Cobra Electronics Corp.© 1999
Printed in China
Part No. 480-205-P-001CB Radio“Ingenious Prod u cts for Easier Co m m u n i cat i o n .” O pe rating Instru ctions 
for your Co b ra 25 NW STFor te c h n i cal assistance, please call our Au to m a ted Help Desk which can assist 
you by answering the most fre q u e n t ly asked questions about Co b ra prod u ct s.
(773) 889-3087 
24 hours a day,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 available on-line in the Frequently Asked Questions (FAQ) section at
www.cobraelec.com or by e-mail to [email protected] 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 follow-
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. If You Think You Need Service25 NWST Manual3.3  6/15/99 12:43 PM  Page 37