How to Use Your
Cobra 29 NW ST
Contents
Features..................................................................................................1
Controls & Indicators.......................................................................A1
Installation
Location .............................................................................................2
Mounting and Connection .........................................................2
Antennas
Features of This Product
CB Antenna.......................................................................................6
Marine Installation .........................................................................6
Ignition Noise Interference ..........................................................7
Operating Your 29 NW ST
•
•
•
40 CB Radio Channels
SoundTracker™ System
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
Heavy-Duty Dynamic
Microphone
•
•
•
•
Full 4 Watts AM RF Power Output
SWR Calibration Meter
™
SoundTracker System ................................................................14
™
Activating SoundTracker ..........................................................15
Instant Channel 19 and 9
NB-ANL/ANL/Off (Noise Blanker/Automatic.........................16
Noise Limiter Switch)
Front Panel 4-Pin Microphone
Connector
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
•
•
Delta -Tune
Switchable Automatic Noise
Limiter & Noise Blanker
•
•
Adjustable Dynamike Boost
Tactile Controls
• Illuminated Front Panel
• Dim Control
• RF Gain
• 9 ft. Mic Cord
CAUTION
RISK OF ELECTRIC SHOCK
!
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC
SHOCK DO NOT REMOVE COVER (OR BACK)
NO USER SERVICEABLE PARTS INSIDE
REFER SERVICING TO QUALIFIED SERVICE
PERSONNEL
!
1
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Installation
Installation
FCC ID:BBO3K229LTD
ANT
COBRA
PA.SP. EXT.SP.
+POWER–
MADE IN CHINA
CT OF
CAGO, ILL.60707
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.
6
Plug power cable into back of unit marked
“Power”. Be sure to observe polarity markings.
Note
In positive ground vehicles the
red wire goes to the chassis and
the black wire is connected to
the ignition switch.
7
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.
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.
4
5
In a negative grounded vehicle, connect the
red lead of the DC power cord to an accessory
12 volt fuse.
29 NW ST
SWR
2
3
CAL
S/RF
SWR
NB/
ANL
ANL
C
R
RF
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.
SIG 1
3
5
7
9
+30dB
P
CAL
OFF
VOL
SQL
DYNAMIKE
RFGA
OFF
MIN
MAX MIN
8
Attach the 4-pin microphone cable to recepta-
cle on front of unit and Install unit in bracket
securely.
4
5
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Antennas
Ignition Noise Interference
Use of a mobile receiver at low signal levels is
CB Antenna
CB Antenna
normally limited by the presence of electrical
noise. The primary source of noise in automobiles
is from the alternator and ignition system.
Typically, when signal level is adequate, the back-
ground noise does not present a serious problem.
Also, when extremely low level signals are being
received, the transceiver may be operated with
the vehicle’s engine turned off. The unit requires
very little current and therefore will not signifi-
cantly discharge the vehicle’s battery.
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.
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.
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.
DATE OF
FCC ID:BBO3K229LTD
MFG :JUNE 98
ANT
COBRA
PA.SP. EXT.SP.
+POWER–
MADE IN CHINA
SERIAL NO.:806135776
PRECISION ENGINEERED PRODUCT OF
COBRA ELECTRONICS CORP. CHICAGO, ILL.60707
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.
1
A standard antenna connector is provided
on the transceiver for easy connection.
Marine Installation
The transceiver will not operate at maximum effi-
ciency in a boat without a ground plate, (unless it
has a steel hull). Before attempting installation ,
consult your dealer for information regarding an
adequate grounding system and prevention of
electrolysis between fittings in the hull and water.
6
7
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Operation
Operation
Turning On
Setting Channel Selector
Turning On
Setting Channel
Selector
Make sure the power cord, antenna and micro-
phone are connected to their proper connectors
before starting.
29 NW ST
TONE
CH19
NB/
ANL
ANL
CB
HI
RX/TX
CH9
NOR
PA
NOR
OFF
29 NW ST
RFGAIN
DIMMER
SWR CAL
SWR
RF
2
3
CAL
S/RF
SWR
NB/
ANL
ANL
CB
SIG 1
3
5
7
9
+30dB
PA
CAL
OFF
VOL
SQL
DYNAMIKE
RFGAIN
AX MIN
MAX MIN
MAX
1
Select
one of forty channels and adjust
OFF
MIN
MAX MIN
MAX
volume. The selected channel is indicated by
the LED readout directly above the channel
selector knob
1
The CB/PA button should be in the
CB position.
29 NW ST
TONE
S/RF
SWR
NB/
ANL
ANL
CH
CH
CB
HI
9
PA
NOR
CAL
OFF
NO
DIMMER
RFGAIN
VOL
SQL
DYNAMIKE
MIN
M
2
Rotate the On/Off Volume knob
a normal listening level.
clockwise to
8
9
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Operation
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 opti-
mum performance.
PUSH &
HOLD
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).
29 NW ST
TONE
CH19
CH9
NB/
ANL
ANL
CB
HI
RX/TX
PA
NOR
OFF
NOR
E
RFGAIN
DIMMER
SWR CAL
3
Push and hold mic button.
Note
AX MIN
MAX MIN
MAX
29 NW ST
The reading will be slightly high-
er on Channels 1 and 40 com-
pared to Channel 20.
TONE
NB/
ANL
ANL
CH19
CH9
CB
HI
RX/TX
1
Select
channel 20.
PA
NOR
OFF
NOR
E
RFGAIN
DIMMER
SWR CAL
29 NW ST
SWR
RF
2
3
CAL
S/RF
SWR
NB/
CB
ANL
ANL
MAX MIN
MAX
MIN
MAX
SIG 1
3
5
7
9
+30dB
PA
CAL
OFF
VOL
SQL
DYNAMIKE
RFGAIN
4
While holding mic
button adjust the
SWR CAL knob so the
meter needle swings
to the CAL ▼ mark on
SWR
RF
2
3
CAL
OFF
MIN
MAX MIN
MAX
SIG 1
3
5
7 9 +30dB
the meter (located on the right).
2
Switch to the CAL position.
continued
10
11
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Operation
Operation
Selecting A Channel
Selecting A
Channel
29 NW ST
SWR
RF
2
3
CAL
S/RF
SWR
NB/
ANL
ANL
CB
SIG 1
3
5
7
9
+30dB
PA
CAL
OFF
TONE
CH19
B
HI
Note
RFGAIN
VOL
SQL
DYNAMIKE
RX/TX
CH9
NOR
Note
Switch to 9 (Emergency) or 19
(Information) for instant access
to these channels.
A
NOR
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.
IN
DIMMER
SWR CAL
OFF
MIN
MAX MIN
MAX
MAX MIN
MAX
5
6
While still holding down the mic button, set
the S/RF SWR CAL switch to the SWR position,
to read the SWR reading.
1
Switch to NOR to select desired channel.
Repeat the same steps two through five on
Channel 1 and 40. This will check SWR for all
channels.
S-Meter
S-Meter
Swings proportionately to strength of incoming
signal when receiving.
To Receive
To Receive
29 N
NB/
ANL
ANL
29 NW ST
TONE
S/RF
SWR
NB/
ANL
ANL
CH19
CH9
SWR
RF
2
3
CAL
S/RF
SWR
CB
HI
9
PA
NOR
CAL
OFF
NOR
SIG 1
3
5
7 9 +30dB
VOL
SQL
DYNAMIKE
RFGAIN
DIMMER
OFF
CAL
VOL
SQL
DYNAMIKE
MIN
MA
1
The S/RF-SWR-CAL switch must be in the
S/RF position to read the meter.
1
Rotate the
On/Off Volume knob clockwise
the green RT/TX LED will be illuminated.
12
13
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Operation
Operation
TM
The SoundTracker System
Activating SoundTracker™
Activating
SoundTracker™
While previous systems only “blanket out” or limit
noise in higher sound frequencies, the revolution-
TM
ary new SoundTracker System actually reduces
TONE
Note
noise while leaving the signal intact in the recep-
tion mode. In the transmission mode, it actually
strengthens the signal, providing you with a
significant reduction in noise on reception
and transmission.
HI
RX/TX
SoundTracker™ gives you
clearer, cleaner reception to
improve CB communications
while on the air.
NOR
DIMMER
MIN
MAX
Sound clarity is measured by the ratio
of the signal level to the noise level.
The higher the signal-to-noise ratio,
the better the sound.
1
Push and release the
is illuminated when SoundTracker™ is
turned on.
ST button. Red LED
TM
How SoundTracker Works
On Reception - “Cuts noise coming in”
With a normal CB, distant signals fall below
the squelch level and are unintelligible. With a
TM
SoundTracker CB, the noise level is cut up to
90%, which increases the signal-to-noise ratio
and dramatically improves signal clarity. This also
allows you to significantly reduce the squelch
level, which greatly expands your listening range.
On Transmission - “Strengthens signals going out”
TM
A SoundTracker CB strengthens the transmit
signal by more effectively using the available RF
power output of the CB. The result is improved
transmission signal clarity and an expanded
transmission range.
14
15
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Operation
Operation
NB-ANL/ANL/OFF (Noise
Blanker/Automatic Noise Limiter) Switch
Tone Hi/Nor
This switch is used to shape the Audio Response
to the operators preference.
NB-ANL/ANL/
OFF (Noise
Blanker/
Tone Hi/Nor
Automatic
Noise Limiter)
Switch
29 NW ST
SWR
RF
2
3
CAL
S/RF
SWR
NB/
ANL
ANL
CB
TONE
CH19
B
HI
RX/TX
SIG 1
3
5
7
9
+30dB
CH9
NOR
PA
CAL
OFF
A
NOR
RFGAIN
VOL
SQL
DYNAMIKE
IN
DIMMER
SWR CAL
OFF
MIN
MAX MIN
MAX
MAX
MIN
MAX
Note
The RF noise blanker is very
effective in reducing repetitive
noises such as ignition interfer-
ence.
1
When switched to ANL the Automatic Noise
Limiter is activated. This helps reduce noise
created by the vehicle’s electronics.
1
When set in HI the treble is increased.
RF Gain Control
RF Gain Control
When switched to NB/ANL position the RF
Noise Blanker is also activated, providing
increased noise filtration.
The RF Gain is used to optimize reception in
strong or weak signal areas.
When switched to OFF position all noise
filtration will be turned off.
29 NW ST
TONE
CH19
SWR
2
3
CAL
S/RF
SWR
NB/
ANL
ANL
HI
CB
CH9
NOR
SIG 1
3
5
7
9
+30dB
NOR
CAL
OFF
Note
DIMMER
VOL
SQL
DYNAMIKE
RFGAIN
The RF Gain is used to optimize
reception in weak signal areas.
MIN
MA
OFF
MIN
MAX MIN
MAX
1
Rotate the
RF Gain knob counterclockwise
to reduce gain in strong signal areas. In weak
signal areas turn clockwise to increase gain.
16
17
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Operation
Operation
Gate open
Dimmer Switch
Dimmer Switch
29 NW ST
TONE
HI
STRONG SIGNALS
MEDIUM SIGNALS
WEAK SIGNALS
NOISE
NOR
DIMMER
29 NW ST
TONE
Note
HI
R
MIN
MA
The Dimmer controls the
brightness of the front panel,
signal strength meter and
channel display.
DIMMER
DYNAMIKE
RFGAIN
2
Full
counterclockwise rotation opens the
“gate” allowing all signals in.
MIN
MAX
29 NW ST
TONE
HI
1
Rotate the
Dimmer knob clockwise for maxi-
mum brightness; counter-clockwise for minimum.
NOR
DIMMER
Gate set to Desired
Setting Squelch
Squelch is the “control gate” for incoming signals.
Setting Squelch
Squelch Setting (DSS)
MIN
MA
STRONG SIGNALS
MEDIUM SIGNALS
WEAK SIGNALS
NOISE
Gate closed
29 NW ST
TONE
HI
STRONG SIGNALS
3
To achieve the Desired Squelch Setting (DSS),
turn the Squelch control counterclockwise
until you hear noise. Now turn the control
clockwise just until the noise stops. This is the
DSS setting.
NOR
DIMMER
MEDIUM SIGNALS
WEAK SIGNALS
NOISE
MIN
M
1
Full
clockwise rotation closes the gate
allowing only very strong signals to enter.
18
19
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Operation
Operation
To Transmit
Transmit
To Transmit
Transmit
29 NW ST
TONE
CH19
NB/
ANL
ANL
Caution!
CB
HI
PUSH &
HOLD
RX/TX
CH9
NOR
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.
PA
NOR
OFF
RFGAIN
DIMMER
SWR CAL
AX MIN
MAX MIN
MAX
1
Select desired
channel.
1
Setting Dynamike
This controls the microphone sensitivity
(outgoing audio level).
Push and hold mic button to transmit.
Setting
Dynamike
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.
29 NW ST
TONE
SWR
RF
2
3
CAL
S/RF
SWR
NB/
ANL
ANL
CH19
CH9
CB
HI
SIG 1
3
5
7
9
+30dB
PA
NOR
CAL
OFF
NOR
VOL
SQL
DYNAMIKE
RFGAIN
DIMMER
OFF
MIN
MAX MIN
MAX MIN
MA
1
Initially, set fully
clockwise so that maxi-
mum voice volume is available. Dynamike
may have to be reduced in some conditions.
20
21
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Operation
Operation
External Speaker
Note
RF Meter
External Speaker
The external speaker jack is used for remote
receiver monitoring.
RF Meter
This meter swings proportionately to the RF
output (outgoing signal) while transmitting.
29 N
NB/
ANL
ANL
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.
SWR
RF
2
3
CAL
S/RF
SWR
D
ANT
PA.SP. EXT.
+POWER–
A
SIG 1
3
5
7 9 +30dB
OFF
CAL
VOL
SQL
DYNAMIKE
Note
1
1
The S/RF-SWR-CAL switch must be in the
S/RF position.
Connect an external speaker to the external
speaker jack on the rear panel.
Cobra external speakers are
rated at 15 watts.
23
22
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Operation
Operation
PA (Public Address)
PA (Public
Address)
PUSH &
HOLD
Note
Speaker should have 8-ohm
impedance and be rated to
handle at least 4.0 watts.
TD
ANT
A
SP. EXT.SP.
+POWER–
A
7
Note
The speaker should be directed
away from the microphone to
prevent acoustic feedback.
1
Connect an external PA speaker to the PA jack
on the rear panel.
3
Push and hold microphone button and speak
in a normal voice.Your voice will now transmit
on the PA speaker.
Note
Activity on the CB channel
will be heard through the PA
speaker. Adjust Volume Control
for normal listening level.
29 NW ST
SWR
RF
2
3
CAL
S/RF
SWR
NB/
ANL
ANL
CB
29 NW ST
SIG 1
3
5
7
9
+30dB
TONE
N
PA
SWR
RF
2
3
CAL
CAL
OFF
S/RF
SWR
NB/
ANL
ANL
CH19
CH9
CB
HI
RFGAIN
VOL
SQL
DYNAMIKE
SIG 1
3
5
7
9
+30dB
PA
NOR
CAL
OFF
NOR
VOL
SQL
DYNAMIKE
RFGAIN
DIMMER
OFF
MIN
MAX MIN
MAX
OFF
MIN
MAX MIN
MAX MIN
M
2
Set CB/PA switch to PA position.
4
Adjust PA speaker volume with the
Dynamike control.
24
25
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Home And Office Set-Up
Temporary Mobile Set-Up
Base Station Operation
(From 120V AC House Current)
To operate your transceiver from home or office
you will need a 13.8 volt DC Power Pack rated at a
minimum of 2 amps, and a properly installed base
station antenna.
Base Station
Operation
(From 120V AC
House Current)
FCC ID:BBO3K229LTD
ANT
COBRA
PA.SP. EXT.SP.
+POWER–
MADE IN CHINA
ODUCT OF
P. CHICAGO, ILL.60707
2
Plug power cable into back of unit marked
“Power”. Be sure to observe polarity markings.
+
—
Warning!
3
Connect properly installed and matched base
station antenna.
Do not attempt to operate this
transceiver by connecting it
directly to 120 vac.
Temporary Mobile Operation
For temporary mobile operation you may want to Mobile Set-Up
Temporary
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.
DATE OF
MFG :JUNE 98
FCC ID:BBO3K229LTD
ANT
COBRA
MADE IN CHINA
PA.SP. EXT.SP.
+POWER–
SERIAL NO.:806135776
PRECISION ENGINEERED PRODUCT OF
COBRA ELECTRONICS CORP CHICAGO, ILL.60707
1
Simply connect the red (+) and black (-)
leads of the transceiver to the corresponding
terminals of the power pack.
.
26
27
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How Your CB Can Serve You
How Your CB Can Serve You
• Warn of traffic problems
• Provide weather and road data
The FCC gives these examples of permitted and
prohibited messages for channel 9. These are
only guidelines and not all-inclusive:
• Provide help in event of an emergency
• Provide direct contact with home or office
• Assist police by reporting erratic drivers
• Get “local information” to find destination
• Communicate with family and friends
• Suggest spots to eat and sleep
Permitted Example Message
Yes
“Tornado sighted six miles north
of town.”
• Keep you alert while traveling
No
“Post number 10.
A Few Rules You Should Know
No tornado sighted.”
A Few Rules
You Should
Know
A. Conversations cannot last more than 5 minutes
with another station. A one minute break is
required to let others use the channel.
Yes
“Out of gas on Rte 15 at km
marker 211.”
B. You cannot blast others off the air by use of
illegally amplified transmitters or illegally
high antennas.
No
“Out of gas in my driveway.”
Yes
“Four car accident on 401 at
Exit 11. Send police and
ambulance.”
C. You cannot use CB to promote illegal activities.
D. Profanity is not allowed.
E. You may not transmit music with a CB.
No
“Traffic moving smoothly on 401.”
F. Selling of merchandise and/or services is
prohibited.
Yes
“Weather Bureau has issued
thunderstorm warning.
Bring sailboat into port.”
1. Set to channel 9 for emergencies
Channel 9
Emergency
Messages
Be sure antenna is properly connected.
No
“Attention motorists.
Weather Bureau advises snow
tomorrow will accumulate
4 to 6 cm.”
2. CB Distress Data
When transmitting an emergency, you should
request a “REACT BASE” and provide the CB
distress data (called CLIP):
Note
Yes
No
“Fire in building at 539 Main,
Calgary.”
C all Sign Identify yourself.
L ocation Be exact.
I njuries Number. Type. Trapped?
P roblem Give details and help needed.
If no response on channel 9,
try channels 19 or 14.
“Halloween patrol number 3.
All quiet.”
Transmit CLIP repeatedly so any monitor can assist.
28
29
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How Your CB Can Serve You
How Your CB Can Serve You
Code Meaning
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:
CB 10-Codes
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
Code Meaning
10-37 Wrecker needed at
10-38 Ambulance needed
10-39 Message delivered
10-1
10-2
10-3
10-4
10-5
10-6
10-7
10-8
10-9
Receiving poorly
Receiving well
Stop transmitting
OK, message received
Relay message
10-41 Turn to channel
10-42 Traffic accident at
10-43 Traffic tie up at
Busy, stand by
10-44 Have a message for
10-45 All units within range please report
10-50 Break channel
Out of service, leaving
In service, subject to call
Repeat message
10-60 What is next message number?
10-62 Unable to copy. Use phone
10-63 Net directed to
10-10 Transmission completed standing by
10-11 Talking too rapidly
10-12 Visitors present
10-64 Net clear
10-13 Advise weather/roads
10-16 Make pick up at
10-65 Awaiting your next message/assignment
10-67 All units comply
10-17 Urgent business
10-18 Anything for us?
10-19 Return to base
10-70 Fire at
10-71 Proceed, transmission in sequence
10-77 Negative contact
10-20 My location is
10-81 Reserve hotel room for
10-82 Reserve room for
10-21 Call by phone
10-22 Report in person to
10-23 Stand by
10-85 My address is
10-91 Talk closer to mic
10-24 Completed last assignment
10-25 Can you contact
10-26 Disregard last info
10-27 Moving to channel
10-28 Identify your station
10-93 Check my frequency on this channel
10-94 Give me a long count
10-99 Mission completed, all units secure
10-200 Police needed at
30
31
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Frequency Ranges
29 NW ST Specifications
GENERAL
The COBRA 29 NW ST transceiver represents one of
CHANNELS . . . . . . . . . . . . . . . . . . . . . . . CB - 40 CH
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.
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;
Channel
Freq.
Channel
Freq.
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
CB
CB
Channel In MHz Channel In MHz
1
2
3
4
5
26.965 21
26.975 22
26.985 23
27.005 24
27.015 25
27.215
27.225
27.255
27.235
27.245
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
6
7
8
9
27.025 26
27.035 27
27.055 28
27.065 29
27.075 30
27.265
27.275
27.285
27.295
27.305
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
10
AUTOMATIC GAIN CONTROL (AGC) .LESS THAN 10 dB CHANGE IN AUDIO
OUTPUT FOR INPUTS FROM 10 TO 50,000
MICROVOLTS
11
12
13
14
15
27.085 31
27.105 32
27.115 33
27.125 34
27.135 35
27.315
27.325
27.335
27.345
27.355
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
16
17
18
19
20
27.155 36
27.165 37
27.175 38
27.185 39
27.205 40
27.365
27.375
27.385
27.395
27.405
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)
32
33
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Limited Two Year Warranty
Optional Accessories
COBRA ELECTRONICS CORPORATION warrants that its
COBRA CB Radios, and the component parts thereof, will
be free of defects in workmanship and materials for period
of two (2) years from the date of first consumer purchase.
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.
21” Base Loaded Magnet
Mount Antenna
38” Base Loaded Magnet
Mount Antenna
HG A1000
HG A1500
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.
$39.95
$59.95
Applicable taxes apply.
Shipping and handling: $6.00
34
35
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Optional Accessories
4 Pin Premium Noise-
Cancelling Microphone
Wood Grain
HG M84W
$89.95
4 Pin Replacement Dynamic
Microphone
HG M73
$24.95
Dynamic External Speaker
Power Microphone
HG M75
4 Pin Noise Canceling
Microphone
HG S100
HG M77
$34.95
$34.95
$39.95
Noise Canceling External
Speaker
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.
HG S300
$39.95
Order by phone:
Call 514.683.1779 x 2264
Order by fax:
514.683.5307
Order by email:
Send to [email protected]
36
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29 NW ST
The CB Story
The Citizens Band lies between the shortwave
broadcast and 10-meter Amateur radio bands,
and was established by law in 1949. The Class D
two-way communications service was opened in
1959. (CB also includes a Class A citizens band
and Class C remote control frequencies.)
Operating Instructions
for your Cobra 29 NW ST
2
IC/FCC Regulations
1
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.”
CB Radio
29 NW ST
TONE
SWR
2
3
CAL
S/RF
SWR
NB/
CH19
CH9
CB
HI
ANL
ANL
R
R
F
F
RX/TX
SIG
1
3
5
7
9
+30dB
PA
NOR
CAL
OFF
NOR
VOL
SQL
DYNAMIKE
RFGAIN
DIMMER
SWR CAL
OFF
MIN
MAX MIN
MAX MIN
MAX
3
4
cb tranceiver
2
9
N
W
S
T
TON
E
HI
NOR
NOR
RF GAIN
DIM
MER
29 NW ST
Operating Instructions
for your Cobra 29 NW ST
CB Radio
What’s Included with Your 29 NW ST
1. CB transceiver
2. Microphone
6. DC power cord
5
29 NW ST
TONE
HI
NOR
NOR
RF GA
IN
DIMM
ER
3. Transceiver bracket
4. Microphone bracket
5. Operating Manual
1.
“Ingenious Products for Easier Communication.”
A1
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Controls and Indicators
Our Thanks to You
Thank you for purchasing the Cobra 29 NW ST CB
Radio. Properly used, this Cobra product will give
you many years of reliable service.
1. 4-Pin Microphone
Connector
19
2. Power On/Off, Volume
3. Squelch
TM
SoundTracker
“Cuts noise coming in...strengthens signals
going out.”
4. Dynamike
5. RF Gain
This Patent pending technology dramatically
improves transmission and reception of CB
signals.
6. Dimmer
7. SWR CAL
8. Channel Selector
9. LED Channel Display
10. Sound Tracker™ LED
11 . RX (Receive)/ TX (Transmit)
TM
The revolutionary SoundTracker System recon-
figures the transmission signal which allows it to
be transferred more efficiently through cluttered
airwaves.
13
14
11
15
17 16
29 NW ST
LED Indicator
10
12
TONE
12 . Sound Tracker™ On/Off
SWR
2
3
CAL
S/RF
SWR
NB/
ANL
ANL
CH19
CB
HI
9
At the same time, it significantly reduces the
amount of static on all incoming CB signals.
R
R
F
F
RX/TX
18
CH9
NOR
SIG
1
3
5
7
9
+30dB
PA
NOR
CAL
OFF
13 . Channel 19/Channel 9/
VOL
SQL
DYNAMIKE
RFGAIN
DIMMER
SWR CAL
Normal Switch
14. Tone Hi/Nor
The end result is a cleaner, clearer sounding
reception of signals and a more powerful
transmission which dramatically improves
CB communications.
OFF
MIN
MAX MIN
MAX MIN
MAX
15. CB/PA Switch
1
2
3
4
5
6
7
8
16 . NB/ANL ANL Off Switch
17. S/RF SWR CAL Switch
18. Signal Strength Meter
19. Microphone
20 21
Back Side
DATE OF
MFG :JUNE 98
FCC ID:BBO3K229LTD
ANT
COBRA
PA.SP. EXT.SP.
+POWER–
MADE IN CHINA
20. Public Address Speaker
SERIAL NO.:806135776
PRECISION ENGINEERED PRODUCT OF
COBRA ELECTRONICS CORP. CHICAGO, ILL.60707
Jack
21. External Speaker Jack
22. Antenna Connector
23. Power Jack
22
23
A1
A2
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