Cobra UK25 LTD ST Operating Instructions Manual

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Downloaded from www.cbradio.nl
Cobra Electronics Corporation
6500 West Cortland Street
Chicago, IL 60707 USA
www.cobraelec.com
U K
25 LTD ST
O pe rating Instru ctions for your Co b ra UK 25 LTD ST CB Ra d i o
Bedienungsanleitung für lhr Modell Co b ra UK 25 LT D S T C B - Fu n kg e r ä t
I n s t ru ct i vo de uso de la radio de banda ciudadana (CB) Co b ra UK25 LT D S T
I n s t ru ctions d’ u t i l i s ation du po s te de radio CB UK 25 LT D S T de Co b ra
Cobra Electronics Corp.© 1999
“Ingenious Prod u cts for Easier Co m m u n i cat i o n .”
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Our Thanks to You
Thank you for purchasing the Cobra UK 25 LTD ST CB Radio.Properly used,this Cobra product will give you many years of reliable service.
SoundTracker
“Cuts noise coming in...strengthens signals going out.”
This patent-pending technology dramatically improves transmission and reception of CB signals.
The revolutionary SoundTrackerTMSystem recon­figures the transmission signal,allowing it to be transferred more efficiently through cluttered air­waves.
TM
Cobra on the World Wide Web: Frequently Asked Questions (FAQ) can be found on-line at: www.cobraelec.com
At the same time,it significantly reduces the amount of static on all incoming CB signals.
The end result is a cleaner,clearer reception of signals and a more powerful transmission which dramatically improve CB communications.
A3
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Controls and Indicators
1. 4 - Pin Mi c ro p h o n eCo n n e cto r
2. Power On/Off/Volume
3. Squelch
4. Tone Control
5. RF Gain
6. Band Selector
7. Channel Selector
8. LED Channel Display 9 Sound Tracker™ LED 1 0 . RX (Receive)/ TX (Transmit)
LED Indicator
11 . Sound Tracker™ On/Off 12 . Channel 19/Channel 9/
Normal Switch
13 . Dimmer Switch 1 4 . CB/PA Switch 1 5 . NB/ANL ANL/Off Switch 1 6 . Signal Strength Meter 1 7 . Microphone
1 6
1
1 7
1 2
1 5
1 31 4
1 0
2 4 536
1 1
Our Thanks to You
Thank you for purchasing the Cobra UK 25 LTD ST CB Radio.Properly used,this Cobra product will give you many years of reliable service.
SoundTracker
TM
“Cuts noise coming in...strengthens signals going out.”
This patent-pending technology dramatically improves transmission and reception of CB signals.
The revolutionary SoundTrackerTMSystem recon­figures the transmission signal,allowing it to be transferred more efficiently through cluttered air­waves.
9
8
At the same time,it significantly reduces the amount of static on all incoming CB signals.
The end result is a cleaner,clearer reception of signals and a more powerful transmission which
7
dramatically improve CB communications.
Cobra on the World Wide Web: Frequently Asked Questions (FAQ) can be found on-line at: www.cobraelec.com
Rear Panel
1 8 . Public Address Speaker Jack 1 9 . External Speaker Jack 2 0 . Antenna Connector 2 1. Power Jack
A2
1 8 1 9
2 0 2 1
A3
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How to Use Your
Cobra UK 25 LTD ST
Contents English (Section A)
Features...........................................................................................1
Included Accessories.................................................................A1
Controls & Indicators................................................................A2
Our Thanks toYou......................................................................A3
SoundTracker
Installation
Location.......................................................................................2
Mounting and Connection...................................................2
Antennas
CB Antenna................................................................................6
Marine Installation...................................................................6
Ignition Noise Interference ...................................................7
Operating Your UK 25 LTD ST
Turning On Your CB.................................................................8
Setting Channel Selector.......................................................9
To Receive...................................................................................10
Selecting a Channel................................................................10
S-Meter.........................................................................................11
SoundTracker™System.........................................................12
Activating SoundTracker™..................................................13
NB,Off (Noise Blanker) Switch.............................................14
Bright/Dim Switch....................................................................15
RF Gain Control.........................................................................15
Setting Squelch.........................................................................16
ToTransmit.................................................................................18
Setting Tone Control...............................................................19
Transmit.......................................................................................20
RF Meter......................................................................................20
External Speaker.......................................................................21
PA (Public Address)..................................................................22
Temporary Mobile Set-Up.....................................................24
Home And Office Set-Up.......................................................25
HowYour CB Can Serve You...................................................26
A Few Rules You Should Know............................................26
Local Laws,or Regulations....................................................27
CB 10 Codes...............................................................................28
Frequency Ranges......................................................................30
UK 25 LTD ST Specifications..................................................31
Optional Accessories.................................................................32
Deutsch................................................................................Abschnitt B
Español.....................................................................................Sección C
Français....................................................................................Section D
Italiano.....................................................................................Sezione E
Features of This Product
• CEPT 40 Channels UK 40 Channels
• Complies with UK MPT 1382
• SoundTracker™System
• Heavy-Duty Dynamic Microphone
• Full 4 Watts RF Power Ou t p u t
• Instant Channel 19 and 9
• Front Panel 4-Pin Microphone Connector
• Switchable Noise Blanker­Automatic Noise Limiter
• RF Gain
• 2.75-metre Microphone Cord
NOTICE
A licence is required for use in the UK.CB licens­ing applications can be obtained from The Radio Licensing Centre,P.O. Box 885,Bristol,BS99 5LG,UK or contact your local CB dealer for additional information.
1
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InstallationInstallation
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 self­tapping screws and star wash­ers.The mounting must be mechanically strong and 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 inte rfe re with the dri ver 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.
cb transceiver
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
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Note Before installing the CB radio,
visually check the vehicle’s battery connection to deter­mine which terminal,positive or negative,is earthed to the engine block (or chassis).A negatively earthed vehicle has its negative lead earthed to the chassis.
Note
Connecting to a fuse circuit controlled by the ignition switch prevents the unit from being left on accidentally,and also permits operating the unit without running the engine.
Note
In positive earth vehicles the red wire goes to the chassis and the black wire is connected to the ignition switch.
4
In a negative earthed 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 the side of the unit (nearer the driver) using two screws sup­plied.Bracket should be placed under the dash so that microphone is readily accessible.
InstallationInstallation
8
Attach the 4-pin microphone cable to recepta­cle on front of unit and Install unit in bracket securely.
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Ignition Noise InterferenceAntennas
CB Antenna
Note
For optimum performance in passenger cars the ideal anten­na location is on the centre of the roof.Second choice is on the centre of the boot.
Note
Antenna bracket must be earth­ed to the chassis of the vehicle.
CB Antenna
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.
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 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.
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 signifi­cantly discharge the vehicle’s battery.
Even though the Cobra UK 25 LTD ST 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
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Operation
Turning On Setting Channel
Turning On
Make sure the power cord,antenna and micro-
phone are connected to their proper connectors
before starting.
1
The CB/PA button should be in the CB position.
Setting Channel Selector
1
Select one of forty channels and adjust volume.The selected channel is indicated by the LED readout directly above the channel selector knob
Operation
Selector
Setting Band Mode Selector
Setting Band Mode Selector
2
Ro t ate the On/Off Volume knob c l oc kw i s eto a normal listening level.
8
1
To operate in UK band,set control toUK, to operate in EU band,set to EU.
9
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Operation
To Receive
Selecting A Channel
Note
Switch to 9 or 19 (Information) for instant access to these channels.
To Receive
1
Rotate the On/Off Volume knob clockwise. The green RT/TX LED will be illuminated.
Selecting A Channel
S-Meter
Swings proportionately to strength of incoming signal when receiving.
Operation
S-Meter
1
Switchto NOR to select desired channel.
10
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OperationOperation
Note
SoundTracker™ gives you clearer,cleaner reception to improve CB communications while on the air.
The SoundTrackerTMSystem
While previous systems only “blanket out”or limit noise in higher sound frequencies,the revolution­ary new SoundTrackerTMSystem 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 SoundTrackerTMWorks
On Reception - “Cuts noise coming in”
With a normal CB,distant signals fall below the squelch level and are unintelligible.With a SoundTrackerTMCB,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 significant­ly,which greatly expands your listening range.
OnTransmission - “Strengthens signals going out”
A SoundTrackerTMCB 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.
Activating SoundTracker™
1
Push and release the ST button.Red LED is illuminated when SoundTracker™ is turned on.
Activating SoundTracker
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OperationOperation
NB/ANL, ANL, OFF (Noise B l a n k e r, Automatic Noise Limiter Switch
Note
The RF noise blanker is very effective in reducing repetitive noises such as ignition interfer­ence.
NB/ANL,ANL,Off Switch
1
When switched to NB/ANL position the RF Noise Blanker and Automatic Noise Limiter is activated,providing increased noise filtration.
2
When switched to the ANL the Automatic Noise Limiter is activated.This helps reduce noise created by the vehicle’s electronics.
When switched to OFF position Noise Blanking and the Automatic Noise Limiting Filtration will be turned off.
Bright/Mid/Dim Switch
1
Switch to BRT,MID or DIM to control bright- ness of the channel indicator and multi-func­tion meter for day or nighttime driving.
RF Gain Control
The RF Gain is used to optimize reception in strong or weak signal areas.
Bright/Mid/Dim Switch
RF Gain Control
Note
The RF Gain is used to optimize reception in weak signal areas.
1
Rotate the RF Gain knob anticlockwise to reduce gain in strong signal areas.In weak signal areas turn clockwiseto increase gain.
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Operation Operation
Setting Squelch
Gate closed
Gate open
Setting Squelch
Squelch is the “control gate”for incoming signals.
1
Full clockwise rotation closes the “gate” allowing only very strong signals to enter.
2
Full anticlockwise rotation opens the “gate” allowing all signals in.
3
To achieve the Desired Squelch Setting (DSS), turn the Squelch control anticlockwise until you hear noise. Now turn the control clockwise until the noise just stops. This is the DSS set­ting.
Gate set to Desired Squelch Setting (DSS)
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Operation Operation
To Transmit
Caution!
Be sure the antenna is properly connected to the radio before transmitting.Prolonged trans­mitting without an antenna,or with a poorly matched antenna, can cause damage to the trans­mitter.
1
Select desired channel.
Setting Tone ControlToTransmit
1
Tone Control is used to set the desirable tone level of received audio signals.
Setting Tone Control
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Operation Operation
Transmit
RF Meter
Transmit
1
Push and hold microphone button to transmit. Transmitter is now activated.When transmit­ting,hold the microphone two inches from your mouth and speak in a clear,normal voice. Release to receive.
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.
1
Connect an external speaker to the external speaker jack on the rear panel.
External Speaker
Note
The external speaker should have 8-ohm impedance and be rated to handle at least 4 watts. When the external speaker is plugged in,the internal speaker is automatically disconnected.
Note
Cobra external speakers are rated at 10 watts.
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OperationOperation
PA (Public Address)
Note
Speaker should have 8-ohm impedance and be rated to handle at least 4 watts.
Note
The speaker should be directed away from the microphone to prevent acoustic feedback.
Note
Adjust volume control to nor­mal listening level.Activity on the CB channel will be heard through the PA speaker.
PA (Public Address)
1
Connect an external PA speaker to the PA jack on the rear panel.
2
Set CB/PA switch to PA position.
3
Push and hold microphone button and speak in a normal voice.Your voice will sound on the PA speaker.
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Home And Office Set-UpTemporary Mobile Set-Up
Temporary Mobile Set-Up
Temporary Mobile Operation
For temporary mobile operation you may want to purchase an optional cigarette lighter adapter from your COBRA dealer.This adapter and a mag­netic mount antenna allow you to“install”your transceiver quickly for temporary use.
Base Station Operation (From 220/240V AC Domestic 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.
1
Connect the red (+) and black (-) leads of the transceiver to the corresponding terminals of the power pack.
Base Station Operation (From 220/240V AC Domestic Current)
Warning!
Do not attempt to operate this transceiver by connecting it directly to 220/240 V AC.
24
2
Plug power cable into back of unit marked “Power”. Be sure to observe polarity markings.
3
Connect properly installed and matched base station antenna.
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How Your CB Can Serve YouHow Your CB Can Serve You
A Few Rules You Should Know
• Warn of traffic delays ahead
• Provide weather and road information
• Provide help in an emergency
• Provide direct contact (subject to conditions) with home or office
• Get local information to find destination
• Let you communicate with family and friends
• Suggest spots to eat and sleep
• Keep you alert while travelling
A Few Rules You Should Know
A. Co nve r s ations should not last more than 5 min-
u te s 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 the CB to promote illegal
activities.
D. Bad language should not be used.
Local Laws or Regulations
The use of this CB product involves the pub­lic airways and its use may be subject to 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.
Local Laws or Regulations
E. You should not transmit music with a CB. F. You should not use your CB to sell
merchandise or professional services.
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How Your CB Can Serve YouHow Your CB Can Serve You
CB 10-Codes
CB 10-Codes
Citizen Bands have adopted the “10-CODES”for standard questions and answers. These codes p rovide quick and easy co m m u n i cat i o n ,e s pe c i a l l y 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 information 10-27 Moving to channel 10-28 Identify your station
Code Meaning
10-29 Time is up for contact 10-30 Does not conform 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 mic 10-93 Check my frequency on this channel 10-94 Give me a long count 10-99 Mission completed,all units secure 10-200 Police needed at
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UK 25 LTD ST SpecificationsFrequency Ranges
The CO B RA UK 25 LTD ST tra n s ce i ver re p re s e nts one of the most adva n ced FM two ­way ra d i o s.This unit fe at u res adva n ced Phase Lock Loop (PLL) circ u i t ry prov i d i n g co m p l e te cove rage of all 40 CEPT and UK FM CB channels.
CEPT Frequencies UK Frequencies
Channel Channel CB Freq. CB Freq. Channel In MHz Channel In MHz
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
CB Freq. CB Freq. Channel In MHz Channel In MHz
1 27.60125 21 27.80125 2 27.61125 22 27.81125 3 27.62125 23 27.82125 4 27.63125 24 27.83125 5 27.64125 25 27.84125
6 27.65125 26 27.85125 7 27.66125 27 27.86125 8 27.67125 28 27.87125 9 27.68125 29 27.88125 10 27.69125 30 27.89125
11 27.70125 31 27.90125 12 27.71125 32 27.91125 13 27.72125 33 27.92125 14 27.73125 34 27.93125 15 27.74125 35 27.94125
16 27.75125 36 27.95125 17 27.76125 37 27.96125 18 27.77125 38 27.97125 19 27.78125 39 27.98125 20 27.79125 40 27.99125
Channel Channel
GENERAL
CHANNELS . . . . . . . . . . . . . . . . . . . . . . . CB - 40 CH
FREQUENCY RANGE (CEPT FM). . . . . 26.965 TO 27.405 MHz
FREQUENCY RANGE (UK FM). . . . . . . 27.60125 TO 27.99125 MHz
FREQUENCY TOLERANCE. . . . . . . . . . 0.005 %
FREQUENCY CONTROL . . . . . . . . . . . . PLL (PHASE LOCK LOOP) SYNTHESIZER
OPERATING TEMPERATURE
RANGE. . . . . . . . . . . . . . . . . . . . . . . . . . . -20° C TO + 55° C
MICROPHONE . . . . . . . . . . . . . . . . . . . . PLUG-IN DYNAMIC
INPUT VOLTAGE . . . . . . . . . . . . . . . . . . 13.2VDC nom.(positive or negative earth)
CURRENT DRAIN TRANSMIT:AM FULL MOD.,1.5A (MAXIMUM)
SIZE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .219 mmX 162 mmX 56 mm
WEIGHT . . . . . . . . . . . . . . . . . . . . . . . . . .1.8 kg.(4 LBS.)
ANTENNA CONNECTOR . . . . . . . . . . . .UHF;SO-239
METER . . . . . . . . . . . . . . . . . . . . . . . . . . .ILLUMINATED;INDICATES RELATIVE
TRANSMITTER
POWER OUTPUT . . . . . . . . . . . . . . . . . .4WATTS
MODULATION . . . . . . . . . . . . . . . . . . . .FM (FREQUENCY MODULATION)
FREQUENCY RESPONSE . . . . . . . . . . . .300 TO 3000 Hz
OUTPUT IMPEDANCE . . . . . . . . . . . . . .50 OHMS,UNBALANCED
RECEIVER
SENSITIVITY . . . . . . . . . . . . . . . . . . . . . . .LESS THAN 6dB µV FOR 20dB SINAD
SELECTIVITY . . . . . . . . . . . . . . . . . . . . . .6 dB @ 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
AUTOMATIC GAIN CONTROL (AGC) .LESS THAN 10 dB CHANGE IN AUDIO
RF GAIN RANGE . . . . . . . . . . . . . . . . . . .40 dB
NOISE BLANKER . . . . . . . . . . . . . . . . . . .RF TYPE
SQUELCH . . . . . . . . . . . . . . . . . . . . . . . . .A D J U S TA B L E ;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
E XTERNAL SPEAKER (NOT SUPPLIED) 8 OHMS;DISABLES INTERNAL SPEAKER
PA SYSTEM
POWER OUTPUT . . . . . . . . . . . . . . . . . .4 WATTS INTO EXTERNAL SPEAKER
EXTERNAL SPEAKER FOR PA . . . . . . . .8 OHMS,4 WATTS MINIMUM,
(NOT SUPPLIED) (SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)
RECEIVE:SQUELCHED,0.3A;FULL AUDIO OUTPUT,1.2A (NOMINAL)
(8-5/8”D X 6-3/8”W X 2-13/64”H)
POWER OUTPUT AND RECEIVED SIGNAL STRENGTH
2ND:455 kHz OUTPUT FOR INPUTS FROM 10 TO 50,000
MICROVOLTS
WHEN CONNECTED
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Optional AccessoriesOptional Accessories
Replacement DC Power Cord
For in-vehicle use
Replacement Microphone Bracket
For in-vehicle use
39”Full Range Base Load, Magnetic Mount Antenna
For in-vehicle use AT 70
Replacement Mounting Bracket
For in-vehicle use
28”Full Range Centre Load, Magnetic Mount Antenna
For in-vehicle use AT 35
44”Full Range,Centre Load, Dual Band CB/WX Antenna
Allows greater transmission range from a moving vehicle. ATW- 4 0 0
Replacement Thumb Screws
For in-vehicle use
25”Glass Mount Antenna
For in-vehicle use AT 55
Replacement Dynamic Microphone
For in-vehicle use CA 73
Power Microphone
For in-vehicle use CA 75
Dynamic External Speaker
For in-vehicle use CS 100
Noise Cancelling/Power Microphone
For in-vehicle use CA 77
Noise Cancelling External Speaker
For in-vehicle use CS 300
Echo/Noise Cancelling Microphone
For in-vehicle use CA 79
Dynamic Noise Cancelling With Talk Back External Speaker
For in-vehicle use CS 500
You Can Find These High-quality Accessories AtYour Local Cobra CB Dealer
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Notes
Notes
34
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