Cobra GR 29 LTD ST User manual

GR 29 LTD ST
Cobra Electronics Corporation
6500 West Cortland Street
Chicago, IL 60707 USA
www.cobraelec.com
“Ingenious Products for Easier Communication.”
OperatingInstructionsforyour CobraGR 29 LTD ST CB Radio
Bedienungsanleitung für lhr Modell Cobra GR 29LTD ST CB-
Funkgerät
Instructivo de usode la radio debanda ciudadana (CB) Cobra
GR 29LTD ST
Instructions d’utilisationdu poste de radioCB GR 29 LTD ST
deCobra
Istruzioni per l’uso del modello Cobra GR 29LTD ST Radio CB
29 GR-English.qx 6/22/99 9:15 AM Page 36

How to Use Your
Cobra GR 29 LTD ST
Contents
Section A(English)
Features..................................................................................................1
Included Accessories ......................................................................A1
Controls & Indicators.......................................................................A2
Our Thanks to You.............................................................................A3
SoundTracker™
Installation
Location.............................................................................................2
Mounting and Connection.........................................................2
Antennas
CB Antenna.......................................................................................6
Marine Installation.........................................................................6
Ignition Noise Interference..........................................................7
OperatingYour GR 29 LTD ST
Turning On Your CB........................................................................8
Setting Channel Selector.............................................................9
Calibrating 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)
Bright/Dim Switch..........................................................................17
RF Gain Control................................................................................17
Setting Delta Control....................................................................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
Local Laws or Regulations...........................................................29
CB 10-Codes.....................................................................................30
Frequency Ranges.............................................................................32
GR 29 LTD ST Specifications.........................................................33
Accessories...........................................................................................34
Deutsch ................................................................................Abschnitt B
Español.....................................................................................Sección C
Français....................................................................................Section D
Italiano .....................................................................................Sezione E
Featuresof ThisProduct
• 2.75-metremicrophonecord
• 40EuropeanCEPT
40GermanFM
12AMChannels
• SoundTracker™System
• Heavy-DutyDynamic
MicrophoneWithChannel
Changer
• Full4WattsFMRFPowerOutput
• 1WattAMPowerOutput
• SWRCalibrationMeter
• InstantChannel19and9
• FrontPanel6-PinMicrophone
Connector
• SwitchableAutomaticNoise
Limiter&NoiseBlanker
• TactileControls
• ToneControl
• IlluminatedFrontPanel
• DimControl
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 !!
29 GR-English.qx 6/22/99 9:14 AM Page 1

InstallationInstallation
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 withthedriver or passenger.
The transceiver is usually mounted to the under-
side of the dash with the microphone bracket
beside it.
Note
Thetransceiverisheldinthe
universalmountingbracketby
twothumbscrewswhichallow
foradjustmentataconvenient
angle.
Thebracketincludestwoself-
tappingscrewsandstarwash-
ers.Themountingmustbe
mechanicallystrongandconve-
nientlylocated.
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
cb transceiver
29 GR-English.qx 6/22/99 9:14 AM Page 2

InstallationInstallation
54
Note
Beforeinstallingthe CBradio,
visuallycheckthe vehicle’s
batteryconnectionto deter-
minewhich terminal, positive
ornegative,isearthedto the
engineblock (orchassis). A
negativelyearthedvehicle
hasitsnegative leadearthed
tothechassis.
Note
Connectingtoafusecircuitcon-
trolledbytheignitionswitch
preventstheunitfrom beingleft
onaccidentally,andalsoper-
mitsoperatingtheunitwithout
runningtheengine.
Note
Inpositiveearthvehiclesthered
wiregoestothechassisandthe
blackwireisconnectedtothe
ignitionswitch.
In a negative earthed 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 (nearer the driver)
using two screws sup-
plied.Bracket should be
placed under the dash
so that microphone is
readily accessible.
6
7
Attach the 6-pin microphone cable to recepta-
cle on front of unit and Install unit in bracket
securely.
8
29 GR-English.qx 6/22/99 9:14 AM Page 4

Ignition Noise InterferenceAntennas
Use of a mobile receiver at low signal levels is
normally limited by the presence of electrical
noise.The primary source of noise in cars is from
the alternator and the 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 signifi-
cantly discharge the vehicle’s battery.
Even though the Cobra GR 29 LTD 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
The antenna is critical in affecting transmission
distance.Only a properly matched antenna sys-
tem will allow maximum power output. Cobra
loaded type antenna models are highly recom-
mended 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 an earth plate,(unless it
has a steel hull). Before attempting installation ,
consult your dealer for information regarding an
adequate earthing system and prevention of
electrolysis between fittings in the hull and water.
CB Antenna
7
Note
Foroptimumperformancein
passengercarstheidealanten-
nalocationisonthecentreof
theroof.Secondchoiceis onthe
centreofthe boot.
Note
Antennamustbeearthed tothe
chassisofthevehicle.
6
1A standard antenna connector is provided
on the transceiver for easy connection.
29 GR-English.qx 6/22/99 9:14 AM Page 6

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
1
Rotate theOn/Off Volume knob clockwiseto
a normal listening level.
The CH19/CH9/NOR switch should be in
the NOR position
Select one of forty channels and adjust
volume.The selected channel is indicated by
the LED readout directly above the channel
selector knob.
Select band Selector: EU-European 40
channels FM,DE-German 40 channels FM,
AM-German 12 channels AM.
1
2
Select channel on microphone by pressing chan-
nel up or down. Lock channel selected with lock
button.
3
29 GR-English.qx 6/22/99 9:14 AM Page 8

While holding micro-
phone button adjust
the SWR CAL knob so
that the meter needle
swings to the CAL ▼
mark on the meter (shown on the right).
OperationOperation
Calibrating For
SWR (Standing
Wave Ratio)
1110
continued
Note
Calibrationmustbemadeinan
openarea(neverinagarage).
Vehicledoorsmustbeclosed.No
oneshouldbestandingnearthe
antenna.(See your antenna
directionsformorecomplete
information).
Note
Thereadingwillbeslightlyhigh-
eronChannels1and40com-
paredtoChannel20.
Pushandhold microphone 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.
Select channel 20.
4
29 GR-English.qx 6/22/99 9:14 AM Page 10

Rotate the On/Off Volume knob clockwise.
The green RX/TX LED will be illuminated.
Repeat the same steps 2 to 5 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 microphone but-
ton,set the S/RF SWR CAL switch to the SWR
position,to read the SWR reading.
5
Operation
13
Operation
12
1
Note
WiththeS/RF-SWR-CALswitch
intheSWRpositionthemeter
needleshouldideallybeasfar
totheleftaspossible.
Anythingover3is notaccept-
able. Aslight antennaheight
adjustment(higherorlower)
mayberequired.Repeatrel-
calibrationsteps.
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
Switchto9 or19forinstant
accesstothesechannels.
To Receive
1
To Receive
29 GR-English.qx 6/22/99 9:14 AM Page 12

OperationOperation
1514
Activating
SoundTracker
™
Pushandrelease 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
OnReception-“Cutsnoisecomingin”
With a normal CB,distant signals fall below
the squelch level and are unintelligible.With a
SoundTrackerTM CB,the noise level is cut by up to
90%,which increases the signal-to-noise ratio
and dramatically improves signal clarity.This also
allows you to reduce the squelch level significant-
ly, which greatly expands your listening range.
OnTransmission-“Strengthenssignalsgoingout”
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™ givesyou
clearer,cleanerreceptionto
improveCBcommunications
whileontheair.
Activating SoundTracker™
29 GR-English.qx 6/22/99 9:15 AM Page 14

Whenswitched to ANL the Automatic Noise
Limiter is activated.This helps reduce noise
created by the vehicle’s electronics.
Whenswitched to NB/ANL position the RF
Noise Blanker is also activated,providing
increased noise filtration.
Whenswitched to OFF position all noise
filtration will be turned off.
OperationOperation
1716
NB-ANL/ANL/
OFF (Noise
Blanker/
Automatic
Noise Limiter)
Switch
Note
TheRFnoiseblankerisvery
effectiveinreducingrepetitive
noisessuchasignitioninterfer-
ence.
NB-ANL/ANL/OFF (Noise
Blanker/Automatic Noise Limiter) Switch
1
RF Gain Control
Dimmer Control
RF Gain Control
The RF Gain is used to optimize reception in
strong or weak signal areas.
Dimmer Control
Note
TheRFGainisusedtooptimize
receptioninweaksignal areas.
Rotate the RF Gain knob anticlockwise to
reduce gain in strong signal areas.In weak
signal areas turn clockwise to increase gain.
1
1Rotatethe Dimmer knobclockwiseformaxi-
mumbrightness;anticlockwiseforminimum.
Note
TheDimmercontrolsthe
brightnessofthefrontpanel,
signalstrengthmeterand
channeldisplay.
29 GR-English.qx 6/22/99 9:15 AM Page 16

Full anticlockwise rotation opens the “gate”
allowing all signals in.
To achieve the Desired Squelch Setting (DSS),
turn the Squelch control anticlockwise until
you hear noise. Now turn the control clockwise
just until the noise just stops. This is the DSS
setting.
1918
Operation Operation
2
3
Gateopen
Gate setto Desired
Squelch Setting(DSS)
Full clockwise rotation closes the “gate”
allowing only very strong signals to enter.
Setting Delta Control
Delta Tone Control is used to set the desirable
level of received audio.
Setting Squelch
Squelch is the“control gate”for incoming signals.
Setting Delta
Control
1
2
1
Switch to Delta+ or Delta - to control tuning.
Rotate theTone Control to desired level.
Gateclosed
Setting Squelch
29 GR-English.qx 6/22/99 9:15 AM Page 18

Setting Dynamike
This controls the microphone sensitivity
(outgoing audio level).
ToTransmit
21
To Transmit Transmit
20
Setting
Dynamike
Caution!
Besuretheantennaisproperly
connectedtotheradio before
transmitting.Prolongedtrans-
mitting without an antenna,or
withapoorly-matched
antenna,cancausedamageto
thetransmitter.
Operation Operation
1
Select desired channel on display of
channel up/down on mic.
1
Initially,set fully clockwise so that maxi-
mum voice volume is available. Dynamike
may have to be reduced in some conditions.
Transmit
Pushandhold microphone 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
29 GR-English.qx 6/22/99 9:15 AM Page 20

OperationOperation
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
Theexternalspeakershould
have8-ohmimpedance andbe
ratedtohandleatleast4watts.
Whentheexternalspeakeris
plugged in,the internal speaker
isautomaticallydisconnected.
Note
Cobraexternalspeakersare
ratedat10 watts.Seeaccessory
page35.
Connect an external speaker to the external
speaker jack on the rear panel.
1
29 GR-English.qx 6/22/99 9:15 AM Page 22

OperationOperation
PA (Public
Address)
2524
PA (Public Address)
Connect an external PA speaker to the PA jack
on the rear panel.
Set CB/PAswitch toPAposition.
Pushandhold 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
Speakershouldhave8-ohm
impedanceandberatedto
handleatleast4watts.
Note
Thespeakershouldbedirected
awayfromthemicrophoneto
preventacousticfeedback.
Note
ActivityontheCBchannelwill
beheardthroughthePAspeaker.
Adjustvolumecontrolfornor-
mallisteninglevel.
1
2
3
4
29 GR-English.qx 6/22/99 9:15 AM Page 24

Temporary Mobile Set-Up
27
Base Station
Operation
(From 220/240V
ACDomestic
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“install”your
transceiver quickly for temporary use.
Base Station Operation
(From 220/240V 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!
Donotattemptto operatethis
transceiverbyconnectingit
directlyto220/240VAC.
1
Connect properly installed and matched base
station antenna.
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
29 GR-English.qx 6/22/99 9:15 AM Page 26

How Your CB Can Serve YouHow Your CB Can Serve You
2928
THE USE OF THIS CB PRODUCT
INVOLVES THE PUBLIC AIRWAYS AND
ITS USE MAY BE SUBJECTTO LOCAL
LAWS OR REGULATIONS.BEFORE USING
THE PRODUCT YOU SHOULD CHECK TO
SEE THAT THE CONTEMPLATED USE
DOES NOT VIOLATE ANY APPLICABLE
LOCAL LAW OR REGULATION.
Channel 9
Emergency
Messages
• Warn of traffic problems
• Provide weather and road data
• Provide help in an emergency
• Provide direct contact with home or office
• Get local information to find destination
• Communicate with family and friends
•Suggest spots to eat and sleep
• Keep you alert while travelling
A Few Rules You Should Know
A. Conversations should not last more than5 min-
utes with another station. A one-minute break
should be taken to let others use the channel.
B. You should not blast others off the air by use
of illegally amplified transmitters or illegally
high antennas.
C. You should not use CB to promote illegalactivities.
D. Bad language should not be used.
E. You should not transmit music with a CB.
F. You should not use your CB to sell merchandise
and/or professional services.
A Few Rules
You Should
Know
Local Laws or
Regulations
Local Laws or Regulations
29 GR-English.qx 6/22/99 9:15 AM Page 28

How Your CB Can Serve YouHow Your CB Can Serve You
3130
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 Breakdown truck needed at
10-38 Ambulance needed
10-39 Message delivered
10-41 Turn to channel
10-42 Traffic accident at
10-43 Traffic delay 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 microphone
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 air
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/road conditions
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 GR-English.qx 6/22/99 9:15 AM Page 30

GR 29 LTD ST SpecificationsFrequency Ranges
3332
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
The COBRAGR 29LTDST transceiverrepresents oneofthe most advancedtwo-wayradios
used.Thisunit features advanced PhaseLock Loop (PLL) circuitry providing completecoverage
ofall 40CEPT,40 German FM and12 GermanAM CBchannels.
41 26.565 61 26.765
42 26.575 62 26.775
43 26.585 63 26.785
44 26.595 64 26.795
45 26.605 65 26.805
46 26.615 66 26.815
47 26.625 67 26.825
48 26.635 68 26.835
49 26.645 69 26.845
50 26.655 70 26.855
51 26.665 71 26.865
52 26.675 72 26.875
53 26.685 73 26.885
54 26.695 74 26.895
55 26.705 75 26.905
56 26.715 76 26.915
57 26.725 77 26.925
58 26.735 78 26.935
59 26.745 79 26.945
60 26.755 80 26.955
Channel Channel
CB Freq. CB Freq.
Channel In MHz Channel In MHz
CEPT Frequencies (EU) German Frequencies (DE)
4 27.005 8 27.055 12 27.105
5 27.015 9 27.065 13 27.115
6 27.025 10 27.075 14 27.125
7 27.035 11 27.085 15 27.135
Channel Channel Channel
CB Freq. CB Freq. CB Freq.
Channel In MHz Channel In MHz Channel In MHz
AM
Frequencies
GENERAL
CHANNELS. . . . . . . . . . . . . . . . . . . . . . . 40 CH CEPT FM,GR FM 40,AND GR AM 12 CH.
FREQUENCY RANGE. . . . . . . . . . . . . . . European CEPT 26.965 TO 27.405 MHz
German FM. . . . . . . . . . . . . . . . . . . . . . . 26.656 TO 26.955 MHz
German AM Frequency Range. . . . . 27.005 TO 27.135 MHz
FREQUENCYTOLERANCE. . . . . . . . . . 0.005 %
FREQUENCY CONTROL . . . . . . . . . . . . PLL (PHASE LOCK LOOP) SYNTHESIZER
OPERATING TEMPERATURE
RANGE. . . . . . . . . . . . . . . . . . . . . . . . . . . -20° C TO + 55° C
MICROPHONE . . . . . . . . . . . . . . . . . . . . PLUG-IN DYNAMIC
INPUT VOLTAGE . . . . . . . . . . . . . . . . . . 13.2 V DC nom.(positive or negative earth)
CURRENT DRAIN TRANSMIT:AM FULL MOD.,1.5A (MAXIMUM)
RECEIVE:SQUELCHED,0.3A;
FULL AUDIO OUTPUT, 1.2A (NOMINAL)
SIZE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .219 mm x 185 mm x 56 mm
(8-5/8”D x 7-9/32”W x2-13/64”H)
WEIGHT . . . . . . . . . . . . . . . . . . . . . . . . . .1.8 kg.(4 Lbs.)
ANTENNA CONNECTOR . . . . . . . . . . . .UHF;SO-239
METER . . . . . . . . . . . . . . . . . . . . . . . . . . .ILLUMINATED;INDICATES RELATIVE
POWER OUTPUT, RECEIVED SIGNAL STRENGTH
andVSWR
TRANSMITTER
POWER OUTPUT . . . . . . . . . . . . . . . . . .4 WATTS FM - 1WATT AM
MODULATION . . . . . . . . . . . . . . . . . . . .AM (AMPLITUDE MODULATION) &
FM (FREQUENCY MODULATION)
FREQUENCY RESPONSE . . . . . . . . . . . .300 TO 3000 Hz
OUTPUT IMPEDANCE . . . . . . . . . . . . . .50 OHMS,UNBALANCED
RECEIVER
SENSITIVITY . . . . . . . . . . . . . . . . . . . . . . .LESS THAN 6 dB µV FOR 20 dB(SINAD)
SELECTIVITY . . . . . . . . . . . . . . . . . . . . . .6dB@ 7 kHz,60 dB@ 10 kHz
IMAGE REJECTION . . . . . . . . . . . . . . . . .80 dB,TYPICAL
ADJACENT-CHANNEL REJECTION . . .60 dB,TYPICAL
IF FREQUENCIES . . . . . . . . . . . . . . . . . .DOUBLE CONVERSION:1ST:10.695 MHz
2ND:455 kHz
AUTOMATIC GAIN CONTROL (AGC) .LESS THAN 10 dBCHANGE IN AUDIO
OUTPUT FOR INPUTS FROM 10 TO 50,000
MICROVOLTS
RF GAIN RANGE . . . . . . . . . . . . . . . . . . .40 dB
NOISE BLANKER . . . . . . . . . . . . . . . . . . .RF TYPE
SQUELCH . . . . . . . . . . . . . . . . . . . . . . . . .ADJUSTABLE;THRESHOLD LESSTHAN1µV
AUDIO OUTPUT POWER . . . . . . . . . . .4WATTS
FREQUENCY RESPONSE . . . . . . . . . . . .300 TO 3000 Hz
DISTORTION . . . . . . . . . . . . . . . . . . . . . .LESS THAN 7% @3 WATTS @ 1000 Hz
BUILT-IN SPEAKER . . . . . . . . . . . . . . . . .8 OHMS,5W
EXTERNALSPEAKER (NOT SUPPLIED) 8 OHMS;DISABLES INTERNAL SPEAKER
WHEN CONNECTED
PA SYSTEM
POWER OUTPUT . . . . . . . . . . . . . . . . . .4 WATTS INTO EXTERNAL SPEAKER
EXTERNAL SPEAKER FOR PA . . . . . . . .8 OHMS,4W MIN.
(NOT SUPPLIED) . . . . . . . . . . . . . . . . . .THE PA SPEAKER ALSO MONITORS THE
RECEIVER;SEPARATE JACK PROVIDED
(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)
29 GR-English.qx 6/22/99 9:15 AM Page 32

You Can Find These High-quality Accessories At Your
Local Cobra CB Dealer
Optional AccessoriesOptional Accessories
3534
DynamicExternalSpeaker
Forin-vehicle use
CS100
NoiseCancelling External
Speaker
Forin-vehicleuse
CS300
DynamicNoise Cancelling
With Talk Back External
Speaker
Forin-vehicleuse
CS500
ReplacementDCPowerCord
Forin-vehicleuse
ReplacementMounting
Bracket
Forin-vehicleuse
ReplacementThumb Screws
Forin-vehicleuse
ReplacementMicrophone
Bracket
Forin-vehicleuse
70cm (28”) Full RangeCentre
Load,MagneticMount
Antenna
Forin-vehicleuse AT-35
65cm (25”) Glass Mount
Antenna
Forin-vehicle use AT-55
100cm (39”) Full RangeBase
Load,Magnetic Mount
Antenna
Forinvehicle use AT-70
112cm (44”) Full Range,
CenterLoad, DualBand
CB/WXAntenna
Allowsgreater transmission
rangewhilein amovingvehicle.
ATW-400
29 GR-English.qx 6/22/99 9:15 AM Page 34

What’s Included with Your GR 29 LTD ST
1. CB transceiver 6. DC power cord
2. Microphone (not shown)
3. Transceiver bracket
4. Microphone bracket
5. Operating Manual
Included Accessories
A1
3
2
4
5
1
29 GR-English.qx 6/22/99 9:15 AM Page 38