Cobra 29wx Stcb Tranciever Manual

							OPERATING INSTRUCTIONS FOR YOUR
40 CHANNEL
CITIZENS BAND 
2-WAY MOBILE RADIO
Model
29 WX ST
Cobra Electronics Corporation
6500 W. Cortland Street
Chicago, IL 60707
PRINTED IN HONG KONG ©COBRA ELECTRONICS CORP. 1997 480-113-P-001 
						

							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 ser-
vice was opened in 1959. (CB also includes a Class Acitizens band and Class C remote
control frequencies.)
FCC regulations permit only ÒtransmissionsÓ (one party to another) rather than
ÒbroadcastsÓ (to a wide audience). Thus, advertising is not allowed on CB Channels
because that is Òbroadcasting.Ó
What Is Weather Radio?
NOAAWEATHER RADIO (NWR) is a service of the National Oceanic and
Atmospheric Administration (NOAA), of the U.S. Department of Commerce. It pro-
vides continuous, around-the-clock broadcasts of the latest weather information
directly from National Weather Service Offices. The broadcasts are tailored to the
weather-information needs of people within the receiving area. For example, coastal
and Great LakesÕ stations provide specialized weather information for area boaters,
fishermen and others engaged in marine activities, as well as general weather infor-
mation for the public-at-large. Three hundred eighty (380) NWR stations are in oper-
ation by the U.S. Government in addition to several NWR stations that are main-
tained by private interest groups.
Under the January 1975 White House policy statement, NOAAWeather Radio was des-
ignated as the sole Government operated radio system to provide direct warnings into
private homes for both natural disasters and nuclear attack. The capability is to sup-
plement warnings by sirens and by commercial radio and television.
NWR Frequencies and Transmission Characters
NWR broadcasts have been allocated seven frequencies within the VHF radio spec-
trum reserved for Government use. Assigned frequencies are:
162.400 MHz162.475 MHz162.525 MHz
162.425 MHz162.500 MHz162.550 MHz
162.450 MHzReplacement 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.
Citizens Band (CB) Radio operators are no longer required to obtain an FCC license to
operate their CB equipment  or provide station identification.
Nevertheless, an operator of a CB radio station is still required to comply with the com-
munications act and with the rules of CB Radio Operation.
The CB Story
1
How To Use YourCitizens Band 
2-Way Mobile RadioModel 29 WX ST
ContentsPage
The CB Story............................................................................................1
SoundTracker System............................................................................1
What is Weather Radio?........................................................................1
Specifications........................................................................................2,3
Installation
Location..................................................................................................4
Mounting Connections....................................................................4, 5
CB Antenna..........................................................................................6
Ignition Noise Interference................................................................7
Operation
Controls and Indicators............................................................8, 9, 10
Operating Procedure to Receive......................................................11
Operating Procedure to Transmit....................................................11
Operating Procedure to Receive Weatherband..............................12
How SoundTracker Works................................................................13
Maintenance and Adjustment............................................................14
Appendix
Ten Code..............................................................................................15
AFew Rules That Should Be Obeyed............................................16
How Your CB Can Serve You..........................................................16
Warranty Service Instructions............................................................17
Limited Two Year Warranty................................................................18
Accessories..................................................................Inside Back Cover
“Cuts Static coming in, adds Punch going out!”
Cobra proudly introduces the first Patent Pending technology that dramatically
improves the transmission and reception of CB radio signals.
This revolutionary system reconfigures the transmission signal which allows it to be
transferred more effectively through cluttered airwaves. It literally ÒpunchesÓ your
message through the hundreds of thousands of signals that are in the air. At the same
time, SoundTracker system dynamically adjusts the relationship between the signal
and static commonly referred to as noise. This allows CobraÕs SoundTrackersystem to
significantly reduce the amount of static on all incoming CB signals. The system can be
further optimized when two SoundTracker CBÕs are used to talk to each other.
The end result is a clearer, cleaner sounding reception of signals and more powerful
transmissions which 
dramaticallyimprove CB Communications 
						

							Specifications (cont.)
GENERALChannels40 
Frequency Range26.965 to 27.405 MHz.
Frequency ControlPhase Lock Loop (PLL) synthesizer.
Frequency Tolerance0.005%.
Operating Temperature Range-30¡C to + 50¡C.
MicrophonePlug-in dynamic.
Input Voltage13.8VDC nom.(positive or negative ground).
Current DrainTransmit: AM full mod., 1.5A(maximum)
Receive: Squelched, 0.3A; full audio output, 1.2A
(nominal).
Size8 5
/
8Ó D  x 79
/
32Ó W  x 2 13
/
64Ó H .
Weight4 lbs.
Antenna ConnectorUHF, SO-239.
Semiconductors26 transistors, 26 diodes, 4 integrated  circuits.
Meter Illuminated; indicates relative power output and
received signal strength.TRANSMITTERPower Output4 watts. 
ModulationAM (Amplitude Modulation).
Frequency Response300 to 3000 Hz.
Output Impedance50 ohms, unbalanced.RECEIVERSensitivityLess than 1 µV for 10dB (S+N)/N.
Selectivity6dB @ 7 KHz, 60 dB @ 10 KHz. 
Image Rejection 80 dB, typical.
Adjacent-Channel Rejection60 dB, typical.
IF FrequenciesDouble 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 ControlAdjustable for optimum signal reception.
Noise BlankerRF type.
SquelchAdjustable; threshold less than 1µV.
Audio Output Power4 watts.
Frequency Response300 to 3000 Hz.
DistortionLess than 7% @ 3 watts @ 1000 Hz.
Built-in Speaker16 ohms, round.
External Speaker (Not Supplied)8 ohms; disables internal speaker when connected.PASYSTEMPower Output4 watts into external speaker.
External Speaker for PA8 ohms, when PA-CB switch is in PA, the PAspeak-
er also monitors the receiver; separate jack provid-
ed. 
(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE) (Not Supplied)
3
ChannelChannel Frequency 
in MHz
2127.215
2227.225
2327.255
2427.235
2527.245
2627.265
2727.275
2827.285
2927.295
3027.305
3127.315
3227.325
3327.335
3427.345
3527.355
3627.365
3727.375
3827.385
3927.395
4027.405
Specifications
FREQUENCYRANGE
The COBRA29 WX ST transceiver represents one of the most advanced AM
two-way radios ever designed for use 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 channels as shown below.
ChannelChannel Frequency 
in MHz
126.965
226.975
326.985
427.005
527.015
627.025
727.035
827.055
927.065
1027.075
1127.085
1227.105
1327.115
1427.125
1527.135
1627.155
1727.165
1827.175
1927.185
2027.205
The COBRA29 WX ST has a vastly superior receiver which includes noise blanker
circuitry and an automatic noise limiter. The receiver also features increased 
protection against cross modulation and strong adjacent channel signals.
To obtain maximum performance please read carefully the descriptions and
operating instructions in this manual. Fill out below; keep for your records.Serial No.
Date of Purchase
Dealer Name
Keep this manual for detailed information about your Cobra CB radio.
SAVE YOUR SALES RECEIPT, CARTON AND PACKING FOR POSSIBLE
FUTURE  USE.
2 
						

							5
Installation (Cont.)
3.
Connect the antenna cable plug to the standard receptacle on the unit. Most
CB antennas are terminated with a type PL-259 plug which mates with the
receptacle marked ANT.
4.
Connect the red lead of DC power cord to +13.8 VDC. In automobile instal-
lations, +13.8 VDC is usually obtained from the accessory contact in the
fuse box. This prevents the set being left on accidentally and also permits
operating the unit without the vehicles engine running.
Before installing the CB radio, visually check the vehicle battery connec-
tions to determine which battery terminal, positive or negative (positive
is the larger of the two) is grounded to the engine block (or chassis).
5.
Connect he black lead to the negative side of the automobile. This is usual-
ly the chassis of the car. Any convenient location with good electrical con-
tact (remove paint) may be used. Plug power cable into jack on back of
transceiver.
In positive ground automobiles the red wire goes to the chassis and the
black wire is connected to the ignition switch.
6.
When 13.8 volts DC is initially applied to radio, the radio will turn on
(when power switch is in OFF position) for 1 second. This is the emergency
weather alert normal initialization procedure.
7.
Mount microphone bracket on right side of the transceiver, or near it using
two screws supplied. When mounting in an automobile, place the bracket
under the dash so the microphone is readily accessible.
Installation
Location
Plan the location of the transceiver and microphone bracket before starting the
installation. Select a location that is convenient for operation and does not inter-
fere with the driver or passengers in the vehicle. In automobiles, the transceiver
is usually mounted to the underneath of the dash panel, with the microphone
bracket beside it.
Mounting and Connection
The transceiver is held in the universal mounting bracket by two thumbscrews,
permitting adjustment at the most convenient angle.
Auniversal mounting bracket is supplied along with self tapping screws and
star washers. The mounting must be mechanically strong and also provide a
good electrical connection to the chassis of the vehicle. To mount the transceiv-
er:
1.
Determine the most convenient location in your vehicle, hold the COBRA
radio with mounting bracket in the exact location desired. If nothing will
interfere with mounting it in the desired position, remove the mounting
bracket and use it as a template to mark the location for the mounting
screws.
2.
Drill necessary holes and secure mounting bracket in location.
4 
						

							7
Installation (Cont.)
Ignition Noise Interference
Use of a mobile receiver at low signal levels is normally limited by the presence
of electrical noise. The primary source of noise in automobile installations is
from the alternator and ignition system in the vehicle. Under most operating
conditions, 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 vehicle engine turned off. The unit requires
very little current and therefore will not significantly discharge the vehicle bat-
tery.
Even though the COBRA29 WX ST has an automatic noise limiter, in some in-
stallations ignition interference may be high enough to make good communica-
tions impossible. The electrical noise may come from several sources. Many pos-
sibilities exist and variations between vehicles require different solutions to
reduce the noise. Consult your COBRAdealer or a 2-way radio technician for
help in locating and correcting the source of severe noise.
Base Station Operation (Operation from 120VAC, House Current)
To operate your transceiver from your home or office, using the regular house
current as the power source, you will require a 12 VDC power pack that has
been specially designed for the purpose. It is available as optional equipment
from your COBRAdealer. It consists of a 120-volt, 60 Hz AC to 12-volt DC
power converter that delivers the required power for the operation of the
transceiver. Simply connect the red (+) and black ( - ) leads of the transceiver to
the corresponding terminals of the power packs.
DO NOT ATTEMPT TO OPERATE THIS TRANSCEIVER BY
CONNECTING DIRECTLY TO 120 VAC.
Temporary Mobile Operation
To operate your COBRAtransceiver from a car on a temporary basis, you may
want to purchase an optional cigar lighter adapter from your COBRAdealer.
This adapter and a magnetic mount antenna allow you to quickly install your
transceiver for temporary use.
6
CB Antenna
Since the maximum allowable power output of the transmitter is limited by the
FCC, the antenna is one important factor  affecting transmission distance. Only
a properly matched antenna system will allow maximum power transfer from
the 50 ohm transmission line to the radiating element. In mobile installations
(cars, trucks, boats, etc.), an antenna system that is non-directional should be
used.
Avertically polarized, quarter-wavelength whip antenna provides the most reli-
able operation and greatest range. Shorter, loaded-type whip antennas are more
attractive, compact and adequate for applications where the maximum possible
distance is not required. Also, the loaded whips do not present the problems of
height imposed by a full quarter-wavelength whip.
Mobile whip antennas utilize the metal body of the vehicle as a ground plane.
When mounted at a corner of the vehicle they are slightly directional, in the di-
rection of the body of the vehicle. For all practical purposes, however, the radia-
tion pattern is nondirectional. The slight directional characteristic will be
observed only at extreme distances. Astandard antenna connector (type SO-239)
is provided on the transceiver for easy connection to a standard PL259 cable
termination. 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 customer representative.
WX Antenna
For best reception of weather channels, we recommend dual band antennas
which provide optimum CB and WX reception. If you want more information
about models and prices, call our consumer hotline 773-889-3087.
When installed in a boat, the transceiver will not operate at maximum efficien-
cy without a ground plate, unless the vessel has a steel hull. Before installing the
transceiver in a boat, consult your dealer for information regarding an adequate
grounding system and prevention of electrolysis between fittings in the hull and
water.
3-Way Combination Antennas are available which allow operation of all three
bands (AM-FM & CB), using a single antenna. However, use of this type of
antenna usually results in less than normal transmit and receive range when
compared to a standard-type Single Band antenna designed for CB only. The
quality of reception of radio signals is highly dependent on the antenna sys-
tem. Typical CB antennas may not be very efficient when used for WX recep-
tion. Call 773-889-3087 for further information.
Installation (Cont.) 
						

							Operation (Cont.)
9
6.
DELTA-TUNE.For normal operation, set this control to the center posi-
tion. This feature has several uses and can greatly enhance receiver oper-
ation. If a received signal is slightly off frequency, the Delta-Tune control
can be used to Òfine-tuneÓ your receiver. Fine tuning is accomplished by
listening for a more readable signal at the speaker or by noting the S-
meter reading when the Delta-Tune control is operated.
Another use of this control is eliminating adjacent interference. If an
exceptionally high level signal from an adjacent channel is creating inter-
ference on the channel being used, the Delta-Tune can be used to mini-
mize or eliminate the interference. Rotate the control until you obtain
minimum adjacent channel interference. NOTE:Delta-Tune is operable
only in the receivemode.
7.WEATHER CHANNELSELECTOR. This switch selects any one of the
seven U.S. NOAAWeatherband broadcast stations (see p. 1). Always keep
set to local NOAAFrequency. See enclosed brochure and card for NOAA
travel information. NOTE: The Weather Alert Tone can be turned off by
positioning this selector in the off location.8.SWR CAL. Used to calibrate the meter for SWR (standing wave ratio)
measurements. Simply switch to CAL, press the PTT switch on the
microphone and calibrate the meter.9.CHANNELSELECTOR SWITCH.This switch selects any one of forty
Citizens Band channels desired. The selected channel is indicated by the
LED readout (17), directly above the channel selector knob.10
.S/RF/SWR/CALSWITCH.When in the S/RF position, the meter swings
proportionally to the strength of the received signal. When transmitting,
the meter indicates relative RF output power.
When in the CAL position, the SWR meter can be calibrated by adjust-
ing the SWR CAL control to the CAL mark on the meter face.
When in the SWR position, the standing wave ratio is measured.
11
.NB-ANL/ANL/ OFFSWITCH:When this switch is in the ANLposition,
only the automatic noise limiter in the audio circuits is activated. When it
is in the NB/ANLposition, the RF noise blanker also is activated. The RF
noise blanker is very effective for repetitive impulse noise, such as igni-
tion interference.
12
.PA/CBSWITCH:.Selects the mode of operation. In the CB position, the
PAfunction is disabled and the unit will transmit and receive on the
selected frequency. The PAfunction should not be used unless a PAspeaker is
connected. In the PAmode, incoming CB transmissions will be heard
through the PAspeaker. This allows you to monitor messages when you
are not inside your vehicle.
13.
CB/WX SWITCH. Used for selection between receiving Weatherband
broadcasts or normal CB operation. The radio will not transmit in the
Weatherband mode. Controls and Indicators
Refer to controls, indicators and connectors as illustrated below:
A. Front Panel
1.
MICROPHONE CONNECTOR.Front panel microphone connector.
2.
OFF/ON/VOLUME.Turn clockwise to turn power on and set the
desired listening volume.
3.
SQUELCH.This control is used to cut off or eliminate receiver back-
ground noise in the absence of an incoming signal. For maximum receiv-
er sensitivity it is desired that the control be adjusted only to the point
where the receiver background noise or ambient background noise is
eliminated. Adjust until the receiver noise disappears. This will require
the incoming signal to be slightly stronger than the average receiver
noise. Further clockwise rotation will increase the threshold level which
a signal must overcome in order to be heard. Only strong signals will be
heard at a maximum clockwise setting.
4.
DYNAMIKE.Adjusts the microphone gain in the transmit and PA
modes. This controls the gain to the extent that full talk power is avail-
able several inches away from the microphone. In the Public Address
(PA) mode, the control functions as the volume control.
5.
RF GAIN.Adjust as required to optimize signal. This control is used pri-
marily to optimize reception in strong signal areas. Gain is reduced by
counterclockwise rotation of the control. 
Operation
8
11
12
14
18
19
16
17
15
13
1
2
3
4
5
6
8
9
10
7 
						

							Operation (Cont.)
11
C. Rear Panel1.
PUBLIC ADDRESS:An external 8-ohm 4.0 watt PAspeaker may be connect-
ed to the PASpeaker Jack when this unit is used as a public address system.
The speaker should be directed away from the microphone to prevent acoustic
feed-back. Physical separation or isolation of the microphone and speaker
must be employed when operating the PAat high output levels.
2.
EXTERNALSPEAKER:The External Speaker Jack is used for remote receiver
monitoring. 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 inter-
nal speaker is automatically disconnected.
3.
ANTENNACONNECTOR:This SO-239 connector permits connection of the
transmission line cable PL-259 connector to the transceiver.
4.
POWER. This jack permits connection of the DC power to the transceiver. A
power cord with polarized plug is supplied with the radio. The polarized plug
ensures that the power will always be connected properly.
Operating Procedure to Receive CB Broadcasts
1.
Be sure that the power cord, antenna and microphone  are connected to the
proper connectors before proceeding further. The PA/CB  should be in the CB
position.
2.
Turn the radio ON by rotating the VOLUME CONTROLclockwise.
3.
Set the RF GAIN CONTROLfully clockwise.
4.
Rotate SQUELCH CONTROLcounterclockwise until incoming signal is heard.
5.
Set the Channel Selector Switch to the desired channel.
6.
Set VOLUME CONTROLto a comfortable listening level.
7.
Engage the SoundTracker system by depressing the buttons labeled ST.
SoundTracker system allows you to reduce unwanted background noise (stat-
ic) and increase the signal for better reception.
Listen to the background noise from the speaker. Turn the SQUELCH CONTROL
slowly clockwise until the noise JUSTdisappears (no signal should be present).
Leave the control at this setting. The squelch is now properly adjusted. The receiv-
er will remain quiet until a signal is actually received. Do not advance the control
too far, or some of the weaker signals will not be heard.
1
2
3
4
14.
CH.19/CH.9/NORMALSWITCH. Used for instant selection of emer-
gency Channel 9 (CH. 9 position) or information Channel 19. In NOR-
MALposition, all 40 CB channels are selected by the CHANNELSELEC-
TOR switch (9).
15.
S-METER. Swings proportionally to the strength of the incoming signal
during receiving. The S/RF-SWR-CALswitch must be in the S/RF position.
RF-METER.Swings proportionally to the RF output power while trans-
mitting. The S/RF-SWR-CALswitch must be in the S/RF position.
SWR METER.Measures standing wave ratio of the antenna system.
Used to properly adjust the length of the antenna and to monitor the
quality of the coaxial cable and all RF electrical connections. If there is any
degradation whatsoever in any of the foregoing, due to humidity, salt
spray, vibration or corrosion, the SWR meter reading will rise, thereby
indicating that a problem exists.
To calibrate, switch to the CAL position, transmit by pressing the mike
switch, and adjust the SWR control to the CAL mark on the meter; then
switch to SWR position for the SWR measurement.
16
.RX/TX/WX LEDINDICATOR.When your radio is in the CB receive
mode, the LED will be green. When in transmit mode, the LED will be red
and in Weatherband mode, the LED will be orange.
17.
LED CHANNELDISPLAY.The selected channel will be displayed.
Display will be off when radio is in Weatherband mode.
18.
SOUNDTRACKER™ SWITCH.Depressing this button turns on the
SoundTracker system in your CB.
19.
SOUNDTRACKER™ INDICATOR.Ared LED will illuminate when the
SoundTracker system is engaged on your CB.
B. PRESS-TO-TALK MICROPHONE.Both the receiver and transmitter are
controlled by the Press-to-Talk switch on the microphone. Press the switch and
the transmitter is activated; release the switch to receive. When transmitting,
hold the microphone two inches from the mouth and speak clearly in a nor-
mal voice. The microphone provided with your radio is a detachable low-
impedance dynamic type. The  radio will not transmit in the Weatherband
mode even though pressing the microphone switch will cause the red TX LED
to illuminate.
Operation (Cont.)
10 
						

							13 12
Operation (Cont.)Operating Procedure to Transmit
1.
Be sure the operator has read and understands part 95, F.C.C. Rules and
Regulations prior to operating the transmitter.
2.
Select the desired channel.
3.
Set the DYNAMIKE control fully clockwise.
4.
The receiver and transmitter are controlled by the pr
ess-to-talk switch
on the
microphone. Press the switch and the transmitter is activated; release switch
to receive. When transmitting (on a clear channel), hold the microphone two
inches from the mouth and speak clearly in a normal voice.
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. 
Operating Procedure for Public Address
1.
Connect a PAspeaker to the PAjack provided on the rear panel.
2.
Place PA/CB/ANLswitch into the PAposition.
3.
Depress push-to-talk switch on micÑspeak in normal voice.
4.
Adjust PAspeaker volume with front panel DYNAMIKE control.
When the Volume control is rotated clockwise, activity on the CB channel
will be heard through the PAspeaker.
Operating Procedure to Receive Weather Band
1.
Place CB/WX Switch in the WX position
2.
Turn the Weather Channel Selector (1-7) until you find the Weather Channel
with the clearest reception. Sometimes more than one channel can be
received depending on your location in the broadcast area; however, the
closest broadcast to you will be the one with the clearest signal (the least sta-
tic or background noise).
3.
If threatening weather is nearby, the National Weather Service may broad-
cast a 10 second alert tone. This tone will be heard through the CB, even if
the CB/WX Switch is in the CB mode or the unit is turned off if desired (see
NOTE below). This enables you to monitor CB frequencies and still be
warned by the National Weather Service Emergency Alert. When you hear
the alert, place the CB/WX switch in the WX position. You will then be able
to hear the Weather Warning Broadcast.
NOTE: If you are using the CB mode, remember to change the CB/WX
Switch from CB to WX every so often to make sure you are continually
tuned to the clearest/closest weather band channel in case an alert is
broadcast.
4.
You can completely disable the Emergency Weather Alert feature by turning
the Weather Channel Selector to the OFF position.
How SoundTracker Works
SOUNDTRACKER SYSTEMWhile previous systems only Òblanked outÓ or limited noise in higher sound
frequencies, the revolutionary new SoundTracker System actually reduces noise
while leaving the signal intact in the reception 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 SOUNDTRACKER WORKSOn Reception–
“Cuts Noise Coming In”
With a normal CB, distant signals fall below the squelch level and are unintelli-
gible. With a SoundTracker 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 significantly reduce the squelch level, which greatly expands
your listening range.On Transmission–
“Strengthens Signals Going Out”
ASoundTracker 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. 
						

							15 14
Maintenance and Adjustment
The COBRACB transceiver is specifically designed for the environment encoun-
tered in mobile installations. The use of all solid state circuitry and its light weight
result in high reliability. Should a failure occur, however, review the following,
then if necessary, replace parts only with identical parts. Do not substitute. Refer
to the schematic diagram and parts. 
1.Check connections to the source of power and make sure it is the 13.8 VDC
required to operate your radio.
2.Check the fuse in the DC power cord. The main power lead (red wire) has
a 2 Amp 3AG type fuse in its holder. Use only the above specified type and
size fuse for maximum protection. Failure to do so, will void the warranty.
3.Make certain the microphone is properly plugged in.
4.Make certain the antenna is properly connected and tuned for minimum
SWR. NOTE:COBRAantennas include full instructions as to how to tune
your antenna. If youre still in doubt about the procedure, contact the
COBRAdealer from whom you purchased your radio and antenna, for
advice. If you hired an installer to install your radio and antenna, contact
the installer.
If you are unable to correct the problem, refer the WARRANTYSERVICE
INSTRUCTIONS at the end of this manual for the correct procedure for warran-
ty and post-warranty service from COBRA.
Adjustment Warning
Replacement or substitution of certain parts with replacements other than those
recommended by COBRA, may be a violation of the technical regulations of Part
95 of the FCC Rules, or of Type Acceptance requirements of Part 2 of said rules.
When making adjustments other than transmitter adjustments, be sure to re-
read applicable portions of this instruction manual to make certain you are fol-
lowing correct procedure and that the radio was properly installed, etc.
For technical assistance, please call our Automated Help Desk 
which can assist you by answering the most 
frequently asked questions about Cobra products.
(773) 889-3087
24 hours a day, 7 days a week.
AConsumer Service Representative can be reached through this same
number 8:00 am - 8:00 pm, Monday through Friday, CST.
Technical assistance is also available on-line in the Frequently Asked
Question (FAQ) section at www.cobraelec.com or by e-mail 
to [email protected]
10-35Confidential information
10-36Correct time is
10-37Wrecker needed at
10-38Ambulance needed at
10-39Your message delivered
10-41Please turn to channel
10-42Traffic accident at
10-43Traffic Tie up at
10-44I have a message for you
10-45All units within range 
please report
10-50Break channel
10-60What is next message number?
10-62Unable to copy, use phone
10-63Net directed to
10-64Net clear
10-65Awaiting your next 
message/assignment
10-67All units copy
10-70Fire at
10-71Proceed with transmission
in sequence
10-77Negative contact
10-81Reserve hotel room for
10-82Reserve room for
10-84My telephone number is
10-85My address is
10-91Talk closer to mike
10-93Check my frequency on 
this channel
10-94Please give me a long count
10-99Mission completed, all 
units secure
10-200Police needed at
Appendix
Citizens Band radio operators have largely adopted the Ò10-codeÓ for standard
questions and answers. Its use permits faster communications and better under-
standing in noisy areas. The following table lists some of the more common
codes and their meanings:
CodeMeaningCodeMeaning
10-1Receiving poorly
10-2Receiving well
10-3Stop transmitting
10-4OK, message received
10-5Relay message
10-6Busy, stand by
10-7Out of service, leaving air
10-8In service, subject to call
10-9Repeat message
10-10Transmission completed, 
standing by
10-11Talking too rapidly
10-12Visitors present
10-13Advise Weather/Road 
conditions
10-16Make pick up at
10-17Urgent business
10-18Anything for us?
10-19Nothing for you, return 
to base
10-20My location is
10-21Call by telephone
10-22Report in person to
10-23Stand by
10-24Completed last assignment
10-25Can you contact
10-26Disregard last information
10-27I am moving to channel
10-28Identify your station
10-29Time is up for contact
10-30Does not conform to FCC rules
10-32I will give you a radio check
10-33EMERGENCYTRAFFIC
10-34Trouble at this station 
						

							Appendix (Cont.)If You Think  You Need Service