Cobra 29 NW How to use your Operating Instructions Manual

How to Use Your

Cobra

®

29 NW

Contents

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

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

FCC Regulations
FCC Warnings
Included Accessories

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

Our Thanks to You ..............................................................................A3

Customer Support

Installation

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

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

Antennas

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

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

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

Operating Your 29 NW

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

NB-ANL/ANL/Off (Noise Blanker/Automatic.........................14

Noise Limiter Switch)

Tone Hi/Nor.......................................................................................15

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

Dimmer Switch................................................................................16

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

To Transmit........................................................................................18

Setting Dynamike ...........................................................................18

Transmit..............................................................................................19

RF Meter .............................................................................................20

External Speaker .............................................................................21

PA (Public Address) ........................................................................22

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

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

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

29 NW Specifications ........................................................................31

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

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

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

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

Features of This Product

• 40 CB Radio Channels

• 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

• Antenna Warning LED

• Switchable Automatic Noise
Limiter & Noise Blanker

• Adjustable Dynamike Boost

• Tactile Controls

• Illuminated Front Panel

• Dim Control

• RF Gain

• 9 ft. Mic Cord

1

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
interference, remove the bracket and use it as
a template to mark the location for the
mounting 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
underside 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
washers. The mounting
must be mechanically strong,
conveniently located.

continued

Drill the holes and secure the bracket.

2

1

Connect the antenna cable plug to the
receptacle 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 ELECTRONICS CORP. CHICAGO, ILL.60707

Installation

Installation

54

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.

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.

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
convenient 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
supplied. Bracket should
be placed under the dash
so microphone is readily
accessible.

6

7

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

8

ANT

PA.SP. EXT.SP.

+ POWER–

FCC ID:BBO3K229LTD

COBRA

MADE IN CHINA

SIG 1 3 5 7 9 +30dB

23 CAL

RF

SWR

RF

DYNAMIKE

RFGAIN

S

S/RF

SWR

CAL

NB/
ANL
ANL

OFF

C

P

MIN MAX MIN MAXOFF

VOL SQL



29 NW

T



Microphone
Connector

SHIELD

AUDI O

RX

TX

1

2

3

4

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
background noise does not present a serious
problem. Also, when extremely low level signals
are being received, the transceiver may be
operated with the vehicle’s engine turned off. The
unit requires very little current and therefore will
not significantly discharge the vehicle’s battery.

Even though the Cobra® 29 NW 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.

CB Antenna

Since the maximum allowable power output of
the transmitter is limited by the FCC, the antenna
is critical in affecting transmission distance. Only
a properly matched antenna system will allow
maximum power output. Cobra® loaded type
antenna models are highly recommended for
most installations. Consult your Cobra® dealer for
further details, or call 773.889.3087 and speak to
a Cobra® representative.

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.

CB Antenna

7

Note

For optimum performance
n 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
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.

6

1

A 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
microphone are connected to their proper
connectors before starting.

Setting Channel Selector

2

DYNAMIKE

RFGAIN

S

S/RF

SWR

CAL

NB/
ANL
ANL

OFF

CB

PA

C

MIN MAX MIN MAXOFF

VOL SQL

SIG 1 3 5 7 9 +30dB

23 CAL

SWR

RF



29 NW LTD C

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

DIMMER

HI

NOR

MIN MAX

RX/TX ANT

29 NW LTD CLASSIC

TONE

9+30dB

MIN MAX

R

DYNAMIKE

RFGAIN

S

S/RF

SWR

CAL

NB/
ANL
ANL

OFF

CB

PA

CH19

CH9

NOR

VOL SQL

DIMMER

HI

NOR

29 NW LTD CLASSIC

TONE

RFGAIN

SWR CAL

NB/
ANL
ANL

OFF

CB

PA

CH19

CH9

NOR

DIMMER

HI

NOR

MIN MAX

RX/TX ANT

29 NW LTD CLASSIC

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
higher on Channels 1 and 40
compared to Channel 20.

Note

ANT Warning indicator will
illuminate when SWR is above 3
on the scale (Check antenna
system).

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
optimum performance.

DYNAMIKE

RFGAIN

S

S/RF

SWR

CAL

NB/
ANL
ANL

OFF

CB

PA

C

MIN MAX MIN MAXOFF

VOL SQL

SIG 1 3 5 7 9 +30dB

23 CAL

SWR

RF

D

N



29 NW LTD

PUSH &
HOLD

Select channel 20.

4

E

RFGAIN

SWR CAL

NB/
ANL
ANL

OFF

CB

PA

CH19

CH9

NOR

DIMMER

HI

NOR

MIN MAX

RX/TX ANT

29 NW LTD CLASSIC

TONE

SIG 1 3 5 7 9 +30dB

23 CALSWR

RF

Rotate the On/Off Volume knob clockwise
the green RX/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
position 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.

SWR CAL

A

CH19

CH9

NOR

DIMMER

HI

NOR

MIN MAX

RX/TX ANT

TONE

To Receive

1

To Receive

DYNAMIKE

RFGAIN

D

S/RF

SWR

CAL

NB/
ANL
ANL

OFF

CB

PA

C

MIN MAX MIN MAXOFF

VOL SQL

SIG 1 3 5 7 9 +30dB

2 3CAL

SWR

RF



29 NW LTD

9+30dB

MIN MAX

R

DYNAMIKE

RFGAIN

S

S/RF

SWR

CAL

NB/
ANL
ANL

OFF

CB

PA

CH19

CH9

NOR

VOL SQL

DIMMER

HI

NOR

29 NW LTD CLASSIC

TONE

DYNAMIKE

R

S/RF

SWR

CAL

NB/
ANL
ANL

OFF

C

VOL SQL

SIG 1 3 5 7 9 +30dB

23 CAL

SWR

RF

D

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

1514

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
interference.

DYNAMIKE

RFGAIN

S

S/RF

SWR

CAL

NB/
ANL
ANL

OFF

CB

PA

C

MIN MAX MIN MAXOFF

VOL SQL

SIG 1 3 5 7 9 +30dB

23 CAL

SWR

RF

D

N



29 NW LTD C

When set in HI the treble is increased.

IN

SWR CAL

A

CH19

CH9

NOR

DIMMER

HI

NOR

MIN MAX

ANTRX/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

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 MAX

R

29 NW LTD CLASSIC

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.

17

Dimmer Switch

16

Operation

Operation

1

2

1

3

Rotate the Dimmer knob clockwise

for maximum brightness; counter-clockwise

for minimum.

CH9

HI

NOR

MIN MAX

DYNAMIKE

RFGAIN

TONE

29 NW LTD CLASSIC

R

DIMMER

NOISE

WEAK SIGNALS

MEDIUM SIGNALS

STRONG SIGNALS

G AT E C L OS E D

NOISE

WEAK SIGNALS

MEDIUM SIGNALS

STRONG SIGNALS

NOISE

WEAK SIGNALS

MEDIUM SIGNALS

STRONG SIGNALS

G AT E 

O P E N

NOISE

WEAK SIGNALS

MEDIUM SIGNALS

STRONG SIGNALS

NOISE

WEAK SIGNALS

MEDIUM SIGNALS

STRONG SIGNALS

G AT E

Gate open

Gate set to Desired
Squelch Setting (DSS)

Gate closed

DIMMER

HI

NOR

MIN MAX

RX/TX ANT

29 NW LTD CLASSIC

TONE

DIMMER

HI

NOR

MIN MAX

RX/TX ANT

29 NW LTD CLASSIC

TONE

Setting Squelch

DIMMER

HI

NOR

MIN MAX

RX/TX ANT

29 NW LTD CLASSIC

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

19

To Transmit Transmit

18

Setting
Dynamike

Caution!

Be sure the antenna is properly
connected to the radio before
transmitting. Prolonged
transmitting without an
antenna, or a poorly matched
antenna, could cause damage
to the transmitter.

Be sure to read the F.C.C. Rules
and Regulations included with
this unit before transmitting.

Operation

Operation

1

Select desired channel.

1

RFGAIN

SWR CAL

NB/
ANL
ANL

OFF

CB

PA

CH19

CH9

NOR

DIMMER

HI

NOR

MIN MAX

RX/TX ANT

29 NW LTD CLASSIC

TONE

Initially, set fully clockwise so that
maximum voice volume is available.
Dynamike may have to be reduced in
some conditions.

DYNAMIKE

RFGAIN

SWR CAL

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 MAX

RX/TX ANT

29 NW LTD CLASSIC

TONE

Transmit

Push and hold mic button to transmit.
Transmitter is now activated. When
transmitting, 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

21

20

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 speaker is plugged in,
the internal speaker is
automatically disconnected.

Note

Cobra® external speakers are
rated at 15 watts. See
accessories page 34.

ANT

PA.SP. EXT.SP.

+ POWER –

Connect an external speaker to the external

speaker jack on the rear panel.

1

DYNAMIKE

RFGAIN

SWR CAL

S/RF

SWR

CAL

NB/
ANL
ANL

OFF

CB

PA

CH19

CH9

NOR

VOL SQL

SIG 1 3 5 7 9 +30dB

23 CALSWR

RF

DIMMER

HI

NOR

RX/TX ANT

29 NW LTD CLASSIC

TONE

Operation

Operation

PA (Public
Address)

2322

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

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

SWR CAL

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 MAX

RX/TX ANT

29 NW LTD CLASSIC

TONE

PUSH &
HOLD

DYNAMIKE

RFGAIN

SWR CAL

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 MAX

RX/TX

29 NW LTD CLASSIC

ANT

PA.SP. EXT.SP.

+ POWER –

Temporary Mobile Set-Up

25

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
magnetic mount antenna allow you to quickly
“install” your transceiver for temporary use.

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

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

24

Warning!

Do not attempt to operate this
transceiver by connecting it
directly to 120 vac.

Note

For further information call
Cobra® Customer Service

773.889.3087.

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

+—

How Your CB Can Serve You

How Your CB Can Serve You

2726

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 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.”

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):

C all Sign Identify yourself.

L ocation Be exact.

I njuries Number. Type. Trapped?
P roblem 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
You Should
Know

How Your CB Can Serve You

How Your CB Can Serve You

2928

Code Meaning

10-29 Time is up for contact

10-30 Does not conform to 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 Reser ve hotel room for

10-82 Reser ve 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 SpecificationsFrequency Ranges

3130

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 transceiver represents
one of the most ad vanced 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 cov er age of
all 40 CB chan nels.

1 26.965 21 27.215
2 26.975 22 27.225
3 26.985 23 27.255
4 27.005 24 27.235
5 27.015 25 27.245

6 27.025 26 27.265
7 27.035 27 27.275
8 27.055 28 27.285
9 27.065 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

3332

COBRA® ELECTRONICS CORPORATION warrants that

its COBRA® CB Radios, and the com po nent 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 war ran ty may be enforced by the first
consumer pur chas er, pro vid ed that the product is utilized
within the U.S.A.

COBRA® will, without charge, repair or replace, at its
option, de fec tive CB radios, products or com po nent parts
upon de liv ery to the COBRA® factory Service Department,
ac com pa nied by proof of the date of first consumer
pur chase, such as a du pli cat ed 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.

This warranty gives you specific legal rights, and you may
also have other rights which vary from state to state.

Exclusions: This limited warranty does not apply;

1) to any product dam aged by accident; 2) in the event
of misuse or abuse of the product or as a result of
un au tho rized alterations or repairs; 3) if the serial
number has been altered, defaced or re moved;

4) if the owner of the product resides outside the U.S.A.

All implied warranties, including war ran ties of
mer chant abil i ty and fitness for a par tic u lar purpose
are limited in duration to the length of this warranty.
COBRA® shall not be liable for any incidental,
con se quen tial or oth er dam ag es; including, without lim ­i ta tion, damages re sult ing from loss of use or
cost of in stal la tion.

Some states do not allow limitations on how
long an implied warranty lasts and/or do not
allow the ex clu sion or limitation of incidental
or con se quen tial dam ag es, so the above lim i ta tions may
not apply to you.

Cobra® Electronics
Corporation

6500 West Cortland Street
Chicago, Illinois 60707 USA

Optional Accessories

Replacement DC Power Cord

For in vehicle use
426-002-N-001

Replacement Mounting
Bracket

For in vehicle use
251-199-9-001

Replacement Thumb Screws

For in vehicle use
634-081-9-001

Replacement Microphone
Bracket

For in vehicle use
741-080-9-001

Replacement Dynamic
Microphone

For in vehicle use
CA 73

21” Base Loaded Magnet
Mount Antenna

HG A1000

38” Base Loaded Magnet
Mount Antenna

HG A1500

3534

Optional Accessories

Accessory Order Info

Optional Accessories

You can find quality Cobra products and
accessories at your local Cobra dealer, or in the
U.S.A., you can order directly from Cobra.
See ordering info on page 35.

Ordering From U.S.A.

Call 773-889-3087 for pricing or
visit www.cobra.com.

For Credit Card Orders

Call 773-889-3087 [Press one from
the main menu] 8:00 a.m. to
5:30 p.m. Central Time, Monday
through Friday.

Make Check or Money Order
Payable To

Cobra Electronics, Attn: Accessories
Dept., 6500 West Cortland Street,
Chicago, IL 60707 U.S.A.

To Order Online

Please visit our website:
www.cobra.com

Item # Description

426-002-N-001 Replacement DC Power Cord

251-353-9-001 Replacement Mounting Bracket

634-081-9-001 Replacement Thumb Screws

741-080-9-001 Replacement Microphone Bracket

HG A1000 21” Base Loaded,

Magnetic Mount Antenna

HG A1500 38” Base Loaded,

Magnetic Mount Antenna

HG M84 4 Pin Premium Noise-Cancelling

Microphone

HG M84W 4 Pin Premium Noise-Cancelling

Microphone (Wood Grain)

HG M73 4 Pin Replacement Dynamic

Microphone

HG M77 4 Pin Noise-Cancelling

Microphone

HG M75 Power Microphone

HG S100 Dynamic External Speaker

HG S300 Noise-Cancelling External Speaker

HG S500 Noise-Cancelling with Talk Back

External Speaker

Dynamic External Speaker

HG S100

Noise Canceling External
Speaker

HG S300

Noise Canceling With Talk
Back External Speaker

HG S500

4 Pin Replacement Dynamic
Microphone

HG M73

4 Pin Noise Canceling
Microphone

HG M77

Power Microphone

HG M75

SIG1 3 5 7 9 +30dB

2 3 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

ANT

29 NW LTD CLASSIC

TONE

The Citizens Band lies between the shor twave
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.)

FCC Regulations

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
“broadcasting.”

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 Operator’s License.

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 operator’s license.

What’s Included with Your 29 NW

1. CB transceiver 6. DC power cord

2. Microphone 7. FCC rules

3. Transceiver bracket 1. (not shown)

4. Microphone bracket

5. Operating Manual

29 NW LTD

CLASSIC

DIMMER

RF GAIN

TONE

HI

NOR

ANT

NOR

29 NW LTD CLASSIC

Cobra® Electronics Corporation
6500 West Cortland Street
Chicago, IL 60707 USA

© 2010 Cobra® Electronics Corporation
Printed in China

Part No. 480-682-P Version C

CB Radio

Operating Instructions
for your Cobra® 29 NW LTD CLASSIC

The CB Story

A1

For technical assistance, please call our Automated Help Desk which can assist

you by answering the most frequently asked questions about Cobra® products.

[phone]

24 hours a day, 7 days a week.

A Consumer Service Representative can be reached at 773.889.3087

8:00 am - 5:30 pm,Monday through Friday, Central Time.

Technical assistance is also available on-line in the Frequently Asked Questions (FAQ)

section at www.cobra.com or by e-mail to [e-mail]

If you think you need service call 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
following 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 West Cortland Street, Chicago, IL 60707 USA.

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

773.889.3087 for assistance.

If You Think You Need Service

3

2

4

5

1

cb tranceiver

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

Thank you for purchasing the Cobra® 29 NW CB
Radio. Properly used, this Cobra® product will
give you many years of reliable service.

Customer Support

Should you encounter any problems with the
product or not understand its many features,
please refer to this owner’s manual. If , af ter
referring to the manual, you still need help,
call Cobra® Customer Service at 773.889.3087.

Controls and Indicators

Cobra® Customer Service

Live operators are available
M-F 8:00 am - 5:30 pm Central
Time at: 773.889.3087

Automated Technical
Assistance available 24 hours a
day, seven days a week. E-mail
questions to:
[e-mail]

Cobra® on the Web:
Frequently Asked Questions
(FAQ) can be found on-line at:
www.cobra.com

Our Thanks to You

A3

A2

1. 4-Pin Microphone

Connector

2. Power On/Off, Volume

3. Squelch

4. Dynamike

5. RF Gain

6. Dimmer

7. SWR CAL

8. Channel Selector

9. LED Channel Display

10. ANT Warning LED

11. RX (Receive)/ TX (Transmit)

LED Indicator

12. Channel 19/Channel 9/

Normal Switch

13. Tone Hi/Nor

14. CB/PA Switch

15. NB/ANL ANL Off Switch

16. S/RF SWR CAL Switch

17. Signal Strength Meter

18. Microphone

Back Side

19. Public Address Speaker

Jack

20. External Speaker Jack

21. Antenna Connector

22. Power Jack

1

2 4 5

3

SIG1 3 5 7 9 +30dB

23 CALRFSWR

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

ANT

29 NW LTD CLASSIC

TONE

6 7 8

21 22

17

9

10

11

19 20

12

13

14

15

16

18

Cobra Electronics Corporation
6500 West Cortland Street
Chicago, IL 60707

For more information or to
order any of our products,
please visit our website:

www.cobra.com

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The Cobra Electronics Corporation

™

line of quality products includes: