How to Use Your
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
®
Cobra
29 NW
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
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
Location
Mounting and
Connection
Note
The transceiver is held in the
universal mounting bracket
by two thumbscrews which
allow for adjustment at a
convenient angle.
The bracket includes two
self-tapping screws and star
washers. The mounting
must be mechanically strong,
conveniently located.
Location
Plan location of transceiver and microphone
bracket before starting the installation.
Select a location that is convenient for operation,
yet does not interfere with the driver or passenger.
The transceiver is usually mounted to the
underside of the dash with the microphone
bracket beside it.
Mounting and Connection
1
Hold the radio with the mounting bracket in
the exact desired location. If there is no
interference, remove the bracket and use it as
a template to mark the location for the
mounting screws.
3
Connect the antenna cable plug to the
receptacle marked “ANT” on the back
of the unit.
2
Drill the holes and secure the bracket.
continued
32
Installation
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
SHIELD
AUD IO
RX
TX
1
2
3
4
Note
Connecting to an accessory fuse
prevents the unit from being left
on accidentally, and also
permits operating the unit
without running the engine.
Note
In positive ground vehicles the
red wire goes to the chassis and
the black wire is connected to
the ignition switch.
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.
4
In a negative grounded vehicle, connect the
red lead of the DC power cord to an accessory
12 volt fuse.
5
Connect the black lead to the negative side
of the vehicle. This is usually the chassis. Any
convenient location with a good electrical
contact (remove paint) may be used.
6
Plug power cable into back of unit marked
“Power”. Be sure to observe polarity markings.
7
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.
8
Attach the 4-pin microphone cable to
receptacle on front of unit and Install unit in
bracket securely.
Installation
Microphone
Connector
54
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
Antennas
Ignition Noise Interference
CB Antenna
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.
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.
1
A standard antenna connector is provided
on the transceiver for easy connection.
Marine Installation
The transceiver will not operate at maximum
efficiency in a boat without a ground plate,
(unless it has a steel hull). Before attempting
installation , consult your dealer for information
regarding an adequate grounding system and
prevention of electrolysis between fittings in the
hull and water.
Use of a mobile receiver at low signal levels is
normally limited by the presence of electrical
noise. The primary source of noise in automobiles
is from the alternator and ignition system.
Typically, when signal level is adequate, the
background noise does not present a serious
problem. Also, when extremely low level signals
are being received, the transceiver may be
operated with the vehicle’s engine turned off. The
unit requires very little current and therefore will
not significantly discharge the vehicle’s battery.
Even though the Cobra® 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.
6
7
Operation
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
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
Operation
Turning On Setting Channel
Turning On
Make sure the power cord, antenna and
Setting Channel Selector
Selector
microphone 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
1
The CB/PA button should be in the
selector knob
CB position.
2
Rotate the On/Off Volume knob clockwise to
a normal listening level.
8
9
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
Operation
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
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
Operation
Calibrate For
SWR (Standing
Wave Ratio)
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.
1
Select channel 20.
2
Switch to the CAL position.
3
Push and hold mic button.
4
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).
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).
continued
1110