Cobra 29 NW ST Operating instructions

How to Use Your
Cobra 29 NW ST
Contents
Features..................................................................................................1
Controls & Indicators.......................................................................A1
Installation
Location .............................................................................................2
Mounting and Connection .........................................................2
Antennas
CB Antenna.......................................................................................6
Marine Installation .........................................................................6
Ignition Noise Interference ..........................................................7
Operating Your 29 NW ST
Turning On Your CB........................................................................8
Setting Channel Selector .............................................................9
Calibrate For SWR (Standing Wave Ratio)..............................10
To Receive..........................................................................................12
Selecting a Channel.......................................................................13
S-Meter ...............................................................................................13
SoundTracker™System ................................................................14
Activating SoundTracker™..........................................................15
NB-ANL/ANL/Off (Noise Blanker/Automatic.........................16
Noise Limiter Switch)
Tone Hi/Nor.......................................................................................17
RF Gain Control................................................................................17
Dimmer Switch................................................................................18
Setting Squelch ...............................................................................18
To Transmit ........................................................................................20
Setting Dynamike...........................................................................20
Transmit..............................................................................................21
RF Meter.............................................................................................22
External Speaker .............................................................................23
PA (Public Address) ........................................................................24
Home And Office Set-Up .............................................................26
Temporary Mobile Set-Up ...........................................................27
How Your CB Can Serve You..........................................................28
A Few Rules You Should Know ..................................................28
Channel 9 Emergency Messages..............................................28
CB 10 Codes......................................................................................30
Frequency Ranges.............................................................................32
29 NW ST Specifications.................................................................33
Warranty Information .....................................................................34
Optional Accessories.................................................................35-36
Features of This Product
•40 CB Radio Channels
•SoundTracker™ System
•Heavy-Duty Dynamic
Microphone
•Full 4 Watts AM RF Power Output
•SWR Calibration Meter
•Instant Channel 19 and 9
•Front Panel 4-Pin Microphone
Connector
•Delta -Tune
•Switchable Automatic Noise
Limiter & Noise Blanker
•Adjustable Dynamike Boost
•Tactile Controls
•Illuminated Front Panel
•Dim Control
•RF Gain
•9ft.Mic Cord
1
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
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN !
!

Installation
Installation
Location
32
Mounting and
Connection
Mounting and Connection
Hold the radio with the mounting bracket in
the exact desired location. If there is no inter-
ference, remove the bracket and use it as a
template to mark the location for the mount-
ing screws.
Location
Plan location of transceiver and microphone
bracket before starting the installation.
Select a location that is convenient for operation,
yet does not interfere with the driver or passenger.
The transceiver is usually mounted to the under-
side of the dash with the microphone bracket
beside it.
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 self-
tapping screws and star wash-
ers.The mounting must be
mechanically strong, conve-
niently located.
continued
Drill the holes and secure the bracket.
2
1
Connect the antenna cable plug to the recep-
tacle marked “ANT” on the back of the unit.
3
ANT PA.SP. EXT.SP.
+POWER–
DATE OF
MFG :JUNE 98 FCC ID:BBO3K229LTD
COBRA
MADE IN CHINA
SERIAL NO.:806135776
PRECISION ENGINEERED PRODUCT OF
COBRA ELECTRONICSCORP. CHICAGO, ILL.60707

Installation
Installation
54
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.
Note
Before installing the CB radio,
visually check the vehicle’s
battery connection to deter-
mine which terminal, positive
or negative, is grounded (pos-
itive is the larger of the two)
to the engine block (or chas-
sis). A negatively grounded
vehicle has its negative lead
grounded to the chassis.
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.
4
5
Plug power cable into back of unit marked
“Power”.Be sure to observe polarity markings.
Mount the microphone
bracket on either side of
the unit (driver’s left)
using two screws sup-
plied. Bracket should be
placed under the dash
so microphone is readily
accessible.
6
7
Attach the 4-pin microphone cable to recepta-
cle on front of unit and Install unit in bracket
securely.
8
ANT PA.SP. EXT.SP.
+POWER–
FCC ID:BBO3K229LTD
COBRA
MADE IN CHINA
CT OF
CAGO, ILL.60707
SIG 1 3 5 7 9 +30dB
23 CAL
RF
SWR
RF
DYNAMIKE RFGA
S/RF
SWR
CAL
NB/
ANL
ANL
OFF
C
P
MIN MAX MINOFF
VOL SQL
29 NW ST

ANT PA.SP. EXT.SP.
+POWER–
DATE OF
MFG :JUNE 98 FCC ID:BBO3K229LTD
COBRA
MADE IN CHINA
SERIAL NO.:806135776
PRECISION ENGINEERED PRODUCT OF
COBRA ELECTRONICS CORP. CHICAGO,ILL.60707
Ignition Noise Interference
Antennas
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 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 vehicle’s engine turned off.The unit requires
very little current and therefore will not signifi-
cantly discharge the vehicle’s battery.
Even though the Cobra 29 NW ST has an auto-
matic 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.
CB Antenna
Since the maximum allowable power output of
the transmitter is limited by the IC/FCC, the
antenna is critical in affecting transmission dis-
tance. Only a properly matched antenna system
will allow maximum power output. Cobra loaded
type antenna models are highly recommended
for most installations. Consult your Cobra dealer
for further details.
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.
CB Antenna
7
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
Because many newer trucks
feature fiberglass door skins, the
outside mirror must be ground-
ed to the chassis via 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.
6
1A standard antenna connector is provided
on the transceiver for easy connection.

The CB/PA button should be in the
CB position.
Operation
9
Operation
Turning On Setting Channel
Selector
8
Turning On
Make sure the power cord, antenna and micro-
phone are connected to their proper connectors
before starting.
Setting Channel Selector
2
DYNAMIKE RFGAIN
S/RF
SWR
CAL
NB/
ANL
ANL
OFF
CB
PA
MIN MAX MIN MAXOFF
VOL SQL
SIG 1 3 5 7 9 +30dB
23 CAL
SWR
RF
29 NW ST
1
Rotate the On/Off Volume knob clockwise to
a normal listening level.
Select one of forty channels and adjust
volume.The selected channel is indicated by
the LED readout directly above the channel
selector knob
1
RFGAIN SWR CAL
NB/
ANL
ANL
OFF
CB
PA
CH19
CH9
NOR
AX MIN MAX
DIMMER
HI
NOR
MIN MAX
RX/TX
29 NW ST
TONE
9 +30dB
MIN M
DYNAMIKE RFGAIN
S/RF
SWR
CAL
NB/
ANL
ANL
OFF
CB
PA
CH
CH
NO
VOL SQL DIMMER
HI
NOR
29 NW ST
TONE

ERFGAIN SWR CAL
NB/
ANL
ANL
OFF
CB
PA
CH19
CH9
NOR
AX MIN MAX
DIMMER
HI
NOR
MIN MAX
RX/TX
29 NW ST
TONE
While holding mic
button adjust the
SWR CAL knob so the
meter needle swings
to the CAL ▼mark on
the meter (located on the right).
Operation
Operation
Calibrate For
SWR (Standing
Wave Ratio)
1110
continued
Note
Calibration must be made in an
open area (never in a garage).
Vehicle doors must be closed. No
one should be standing near the
antenna. (See your antenna
directions for more complete
information).
Note
The reading will be slightly high-
er on Channels 1 and 40 com-
pared to Channel 20.
Push and hold mic button.
Switch to the CAL position.
2
1
3
Calibrate for SWR (Standing Wave Ratio)
SWR calibration is done to properly adjust the
length of the antenna and to monitor the quality
of the coaxial cable and all RF connections.
This calibration is critical in order to achieve opti-
mum performance.
DYNAMIKE RFGAIN
S/RF
SWR
CAL
NB/
ANL
ANL
OFF
CB
PA
MIN MAX MIN MAXOFF
VOL SQL
SIG 1 3 5 7 9 +30dB
23 CAL
SWR
RF
29 NW ST
PUSH &
HOLD
Select channel 20.
4
ERFGAIN SWR CAL
NB/
ANL
ANL
OFF
CB
PA
CH19
CH9
NOR
MAX MIN MAX
DIMMER
HI
NOR
MIN MAX
RX/TX
29 NW ST
TONE
SIG 1 3 5 7 9 +30dB
23 CALSWR
RF

Rotate the On/Off Volume knob clockwise
the green RT/TX LED will be illuminated.
Repeat the same steps two through five on
Channel 1 and 40. This will check SWR for all
channels.
The S/RF-SWR-CAL switch must be in the
S/RF position to read the meter.
6
While still holding down the mic button, set
the S/RF SWR CAL switch to the SWR position,
to read the SWR reading.
5
Operation
13
Operation
12
1
Note
When switched to SWR posi-
tion the meter needle should
ideally be as far to the left as
possible. Anything over 3 is
not acceptable. A slight
antenna height adjustment
(higher or lower) may be
required. Repeat relcalibration
steps.
S-Meter
S-Meter
Swings proportionately to strength of incoming
signal when receiving.
Switch to NOR to select desired channel.
1
Selecting A
Channel
Selecting A Channel
Note
Switch to 9 (Emergency) or 19
(Information) for instant access
to these channels.
IN SWR CAL
B
A
CH19
CH9
NOR
MAX
DIMMER
HI
NOR
MIN MAX
RX/TX
TONE
To Receive
1
To Receive
DYNAMIKE RFGAIN
S/RF
SWR
CAL
NB/
ANL
ANL
OFF
CB
PA
MIN MAX MIN MAXOFF
VOL SQL
SIG 1 3 5 7 9 +30dB
23 CAL
SWR
RF
29 NW ST
9 +30dB
MIN MA
DYNAMIKE RFGAIN
S/RF
SWR
CAL
NB/
ANL
ANL
OFF
CB
PA
CH19
CH9
NOR
VOL SQL DIMMER
HI
NOR
29 NW ST
TONE
DYNAMIKE
S/RF
SWR
CAL
NB/
ANL
ANL
OFF
VOL SQL
SIG 1 3 5 7 9 +30dB
23 CALSWR
RF
29 N

Operation
Operation
1514
Activating
SoundTracker™
Push and release the ST button. Red LED
is illuminated when SoundTracker™ is
turned on.
1
The SoundTrackerTM System
While previous systems only “blanket out” or limit
noise in higher sound frequencies, the revolution-
ary new SoundTrackerTM System actually reduces
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.
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 SoundTrackerTM Works
On Reception - “Cuts noise coming in”
With a normal CB, distant signals fall below
the squelch level and are unintelligible. With a
SoundTrackerTM 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”
A SoundTrackerTM 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.
Note
SoundTracker™ gives you
clearer, cleaner reception to
improve CB communications
while on the air.
Activating SoundTracker™
DIMMER
HI
NOR
MIN MAX
RX/TX
TONE

When switched to ANL the Automatic Noise
Limiter is activated.This helps reduce noise
created by the vehicle’s electronics.
When switched to NB/ANL position the RF
Noise Blanker is also activated, providing
increased noise filtration.
When switched to OFF position all noise
filtration will be turned off.
Operation
Operation
1716
NB-ANL/ANL/
OFF (Noise
Blanker/
Automatic
Noise Limiter)
Switch
RF Gain Control
Tone Hi/Nor
RF Gain Control
The RF Gain is used to optimize reception in
strong or weak signal areas.
Tone Hi/Nor
This switch is used to shape the Audio Response
to the operators preference.
Note
The RF Gain is used to optimize
reception in weak signal areas.
Note
The RF noise blanker is very
effective in reducing repetitive
noises such as ignition interfer-
ence.
DYNAMIKE RFGAIN
S/RF
SWR
CAL
NB/
ANL
ANL
OFF
CB
PA
MIN MAX MIN MAXOFF
VOL SQL
SIG 1 3 5 7 9 +30dB
23 CAL
SWR
RF
29 NW ST
When set in HI the treble is increased.
IN SWR CAL
B
A
CH19
CH9
NOR
MAX
DIMMER
HI
NOR
MIN MAX
RX/TX
TONE
Rotate the RF Gain knob counterclockwise
to reduce gain in strong signal areas. In weak
signal areas turn clockwise to increase gain.
DYNAMIKE RFGAIN
S/RF
SWR
CAL
NB/
ANL
ANL
OFF
CB
PA
CH19
CH9
NOR
MIN MAX MIN MAXOFF
VOL SQL
SIG 1 3 5 7 9 +30dB
23 CAL
SWR
DIMMER
HI
NOR
MIN MA
29 NW ST
TONE
1
NB-ANL/ANL/OFF (Noise
Blanker/Automatic Noise Limiter) Switch
1
1

Full clockwise rotation closes the gate
allowing only very strong signals to enter.
Full counterclockwise rotation opens the
“gate” allowing all signals in.
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.
Dimmer Switch
Setting Squelch
Squelch is the “control gate” for incoming signals.
19
Dimmer Switch
18
Operation Operation
1
2
1
3
Rotate the Dimmer knob clockwise for maxi-
mum brightness; counter-clockwise for minimum.
CH9
HI
NOR
MIN MAX
DYNAMIKE RFGAIN
TONE
29 NW ST
R
DIMMER
NOISE
WEAK SIGNALS
MEDIUM SIGNALS
STRONG SIGNALS
GATE CLOSED
NOISE
WEAK SIGNALS
MEDIUM SIGNALS
STRONG SIGNALS
NOISE
WEAK SIGNALS
MEDIUM SIGNALS
STRONG SIGNALS
GATE OPEN
NOISE
WEAK SIGNALS
MEDIUM SIGNALS
STRONG SIGNALS
NOISE
WEAK SIGNALS
MEDIUM SIGNALS
STRONG SIGNALS
GATE
Gate open
Gate set to Desired
Squelch Setting (DSS)
Gate closed
DIMMER
HI
NOR
MIN MA
29 NW ST
TONE
DIMMER
HI
NOR
MIN MA
29 NW ST
TONE
Setting Squelch
DIMMER
HI
NOR
MIN M
29 NW ST
TONE
Note
The Dimmer controls the
brightness of the front panel,
signal strength meter and
channel display.

Setting Dynamike
This controls the microphone sensitivity
(outgoing audio level).
To Transmit
21
To Transmit Transmit
20
Setting
Dynamike
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.
Operation Operation
1
Select desired channel.
1
RFGAIN SWR CAL
NB/
ANL
ANL
OFF
CB
PA
CH19
CH9
NOR
AX MIN MAX
DIMMER
HI
NOR
MIN MAX
RX/TX
29 NW ST
TONE
Initially, set fully clockwise so that maxi-
mum voice volume is available. Dynamike
may have to be reduced in some conditions.
DYNAMIKE RFGAIN
S/RF
SWR
CAL
NB/
ANL
ANL
OFF
CB
PA
CH19
CH9
NOR
MIN MAX MIN MAXOFF
VOL SQL
SIG 1 3 5 7 9 +30dB
23 CAL
SWR
RF
DIMMER
HI
NOR
MIN MA
29 NW ST
TONE
Transmit
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.
1
PUSH &
HOLD

Operation
Operation
RF Meter
23
22
External Speaker
RF Meter
This meter swings proportionately to the RF
output (outgoing signal) while transmitting.
External Speaker
The external speaker jack is used for remote
receiver monitoring.
The S/RF-SWR-CAL switch must be in the
S/RF position.
1
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 15 watts.
ANT PA.SP. EXT.SP.
+POWER–
D
A
Connect an external speaker to the external
speaker jack on the rear panel.
1
DYNAMIKE
S/RF
SWR
CAL
NB/
ANL
ANL
OFF
VOL SQL
SIG 1 3 5 7 9 +30dB
23 CALSWR
RF
29 N

Operation
Operation
PA (Public
Address)
2524
PA (Public Address)
Connect an external PA speaker to the PA jack
on the rear panel.
Set CB/PA switch to PA position.
Push and hold microphone button and speak
in a normal voice.Your voice will now transmit
on the PA speaker.
Adjust PA speaker volume with the
Dynamike control.
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.
1
2
3
4
DYNAMIKE RFGAIN
S/RF
SWR
CAL
NB/
ANL
ANL
OFF
CB
PA
CH19
CH9
NOR
MIN MAX MIN MAXOFF
VOL SQL
SIG 1 3 5 7 9 +30dB
23 CAL
SWR
RF
DIMMER
HI
NOR
MIN M
29 NW ST
TONE
PUSH &
HOLD
DYNAMIKE RFGAIN
S/RF
SWR
CAL
NB/
ANL
ANL
OFF
CB
PA
MIN MAX MIN MAXOFF
VOL SQL
SIG 1 3 5 7 9 +30dB
23 CAL
SWR
RF
N
29 NW ST
ANT PA.SP. EXT.SP.
+POWER–
TD
AA
7

Temporary Mobile Set-Up
27
Base Station
Operation
(From 120V AC
House Current)
Temporary
Mobile Set-Up
Temporary 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.
ANT PA.S P. EXT.SP.
+POWER–
DATEOF
MFG :JUNE 98 FCCID:BBO3K229LTD
COBRA
MADEIN CHINA
SERIALNO.:806135776
PRECISIONENGINEERED PRODUCT OF
COBRA ELECTRONICS CORP. CHICAGO, ILL.60707
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.
Home And Office Set-Up
26
Warning!
Do not attempt to operate this
transceiver by connecting it
directly to 120 vac.
1
Connect properly installed and matched base
station antenna.
Simply connect the red (+) and black (-)
leads of the transceiver to the corresponding
terminals of the power pack.
Plug power cable into back of unit marked
“Power”.Be sure to observe polarity markings.
2
3
ANT PA.SP. EXT.SP.
+POWER–
FCC ID:BBO3K229LTD
COBRA
MADE IN CHINA
ODUCT OF
P. CHICAGO, ILL.60707
+—

How Your CB Can Serve You
How Your CB Can Serve You
2928
The 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 Rte 15 at km
marker 211.”
No “Out of gas in my driveway.”
Yes“Four car accident on 401 at
Exit 11. Send police and
ambulance.”
No “Traffic moving smoothly on 401.”
Yes“Weather Bureau has issued
thunderstorm warning.
Bring sailboat into port.”
No “Attention motorists.
Weather Bureau advises snow
tomorrow will accumulate
4 to 6 cm.”
Yes“Fire in building at 539 Main,
Calgary.”
No “Halloween patrol number 3.
All quiet.”
1. 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 Sign Identify yourself.
Location Be exact.
Injuries Number.Type.Trapped?
Problem Give details and help needed.
Transmit CLIP repeatedly so any monitor can assist.
Channel 9
Emergency
Messages
Note
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. Conversations cannot last more than 5 minutes
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
Yo u Should
Know

How Your CB Can Serve You
How Your CB Can Serve You
3130
Code Meaning
10-29 Time is up for contact
10-30 Does not conform to IC/FCC rules
10-33 Emergency traffic
10-34 Trouble 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
10-81 Reserve hotel room for
10-82 Reserve room for
10-85 My address is
10-91 Talk closer to mic
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
CB 10-Codes
Citizen Bands have adopted the “10-CODES”for
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:
Code Meaning
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-Codes

29 NW ST SpecificationsFrequency Ranges
3332
GENERAL
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 DRAIN TRANSMIT: AM FULL MOD., 1.5A (MAXIMUM)
RECEIVE: SQUELCHED, 0.3A;
FULL AUDIO OUTPUT, 1.2A (NOMINAL)
SIZE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-5/8” D X 7-9/32”W X 2-13/63” H
WEIGHT . . . . . . . . . . . . . . . . . . . . . . . . . .4 LBS.
ANTENNA CONNECTOR . . . . . . . . . . . .UHF; SO-239
METER . . . . . . . . . . . . . . . . . . . . . . . . . . .ILLUMINATED; INDICATES RELATIVE
POWER OUTPUT, RECEIVED
SIGNAL STRENGTH AND VSWR
TRANSMITTER
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 10dB (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
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 . . . . . . . . . . . . . . . . . . . . . . . . .ADJUSTABLE; 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
EXTERNAL 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)
The COBRA 29 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.
126.965 21 27.215
226.975 22 27.225
326.985 23 27.255
427.005 24 27.235
527.015 25 27.245
627.025 26 27.265
727.035 27 27.275
827.055 28 27.285
927.065 29 27.295
10 27.075 30 27.305
11 27.085 31 27.315
12 27.105 32 27.325
13 27.115 33 27.335
14 27.125 34 27.345
15 27.135 35 27.355
16 27.155 36 27.365
17 27.165 37 27.375
18 27.175 38 27.385
19 27.185 39 27.395
20 27.205 40 27.405
Channel Channel
CB Freq. CB Freq.
Channel In MHz Channel In MHz

Limited Two Year Warranty
3534
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.
COBRA will, without charge, repair or replace, at its option,
defective CB radios, products or component parts upon
delivery to a 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 Cobra's expense, if the product is repaired or
replaced under warranty.
Optional Accessories
21” Base Loaded Magnet
Mount Antenna
HG A1000
$39.95
38” Base Loaded Magnet
Mount Antenna
HG A1500
$59.95
Applicable taxes apply.
Shipping and handling: $6.00

36
Optional Accessories
You Can Find These Fine Accessories At Your Local
Cobra® CB Dealer
If you wish, you can order directly from Cobra®. Send order, your
name, address and method of payment.
Order by phone:
Call 514.683.1779 x 2264
Order by fax:
514.683.5307
Order by email:
Send to [email protected]
4 Pin Premium Noise-
Cancelling Microphone
Wood Grain
HG M84W
$89.95
4 Pin Replacement Dynamic
Microphone
HG M73
$24.95
4 Pin Noise Canceling
Microphone
HG M77
$39.95
Dynamic External Speaker
HG S100
$34.95
Noise Canceling External
Speaker
HG S300
$39.95
Power Microphone
HG M75
$34.95

SIG 1 3 5 7 9 +30dB
23 CAL
RF
SWR
RF
DYNAMIKE RFGAIN SWR CAL
S/RF
SWR
CAL
NB/
ANL
ANL
OFF
CB
PA
CH19
CH9
NOR
MIN MAX MIN MAXOFF
VOL SQL DIMMER
HI
NOR
MIN MAX
RX/TX
29 NW ST
TONE
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.)
IC/FCC Regulations
IC/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.”
What’s Included with Your 29 NW ST
1. CB transceiver 6. DC power cord
2. Microphone
3. Transceiver bracket 1.
4. Microphone bracket
5. Operating Manual
29NWST
DIMMER
RF GAIN
TONE
HI
NOR NOR
29 NW ST
CB Radio
Operating Instructions
for your Cobra 29 NW ST
The CB Story
A1
3
2
4
5
1
cb tranceiver
29NW ST
DIMMER
RFGAIN
TONE
HI
NORNOR
29 NW ST
CB Radio
“IngeniousProducts for Easier Communication.”
Operating Instructions
for your Cobra 29 NW ST