Our Thanks, The CB Story,
and Customer Assistance
Introduction
Thank you for purchasing the Cobra 19 DX IV CB Radio
Transceiver. Properly used, this Cobra product will give
you many years of reliable service.
The Citizens Band 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.)
Owner’s Manual
Customer Assistance
The Cobra line of quality products includes:
Customer Assistance
Should you encounter any problems with this product, or not understand
its many features, please refer to this owner’s manual. If you require further
assistance after reading this manual, Cobra Electronics offers the following
customer assistance services:
CB Radios
microTALK® Radios
For Assistance in the U.S.A.
Automated Help Desk English only.
Radar/Laser Detectors
Safety Alert® Traffic Warning Systems
Handheld GPS Receivers
Mobile GPS Navigation Systems
HighGear® Accessories
CobraMarine™ VHF Radios
Power Inverters
24 hours a day, 7 days a week 773-889-3087 (phone).
Customer Assistance Operators English and Spanish.
8:00 a.m. to 6:00 p.m. CT Mon. through Fri. (except holidays) 773-889-3087 (phone).
Questions English and Spanish.
Faxes can be received at 773-622-2269 (fax).
Technical Assistance English only.
English and Spanish. [email protected] (e-mail).
For Assistance Outside the U.S.A.
Contact Your Local Dealer
Accessories
For more information or to
order any of our products,
please visit our website:
MOBILE RADIO
Printed in China
Part No. 480-170-P
Version A
©2005 Cobra® Electronics Corporation
6500 West Cortland Street
Chicago, Illinois 60707 USA
19 DX IV
Nothing comes close to a Cobra®
Nothing comes close to a Cobra®
English
English
A1
English
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Contents
Introduction
Introduction
Our Thanks to You . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A1
The Citizens Band Story . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A1
Customer Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A1
Product Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A2
FCC Regulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A3
Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Included in this Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation and Start-Up
Mounting and Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Operating Your Mobile Radio
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Antenna Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
External Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Public Address (PA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Turning on Your Mobile Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CB Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Microphone Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Squelch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
RF Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Selecting a Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Channel 9/NOR/Channel 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
CB/PA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
S/RF Power Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
TX Indicator LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Ignition Noise Interference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Temporary Mobile Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Operating Procedure to Receive . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Operating Procedure to Transmit . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Maintenance/Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Frequency Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Warranty
Limited One-Year Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Customer Assistance
Product Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Order Form and Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . 17
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1
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Warnings and
Included in this Package
Mounting and Connections
Introduction
Installationand Start-Up
Warnings
Mounting and Connections
•
•
Select a location for the transceiver and microphone bracket that is convenient for
operation. In automobiles, the transceiver is usually mounted to the underneath of
the dash panel, with the microphone bracket beside it.
REPLACEMENT 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 those rules.
When making adjustments, be sure to re-read applicable portions of this instruction manual
to make certain you are following correct procedure and that the radio was properly installed.
A universal mounting bracket is supplied along with self
tapping screws and star washers. The transceiver is held
in the universal mounting bracket by two thumb screws,
permitting adjustment at the most convenient angle.
Transceiver Bracket
A FEW RULES THAT SHOULD BE OBEYED
1. You are not allowed to carry on a conversation with another station for more than five minutes
at a time without taking a one-minute break to give others a chance to use the channel.
2. You are not allowed to blast others off the air by overpowering them with illegally
amplified transmitter power or illegally high antennas.
3. You are not allowed to use CB to promote illegal activities.
4. You are not allowed to use profanity.
5. You may not play music in your CB.
To mount and connect your transceiver:
CB Tranceiver
1. Hold the radio with mounting bracket in the exact
location desired. 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.
3. Connect the antenna cable plug to the receptacle
marked “ANT” on the back of the unit.
4. Connect the red lead of the DC power cord
to an accessory 12 volt fuse.
Antenna Connector
6. You may not use your CB to sell merchandise or professional service.
CHANNEL 9 EMERGENCY MESSAGES
Use Channel 9 for emergency messages only. The FCC gives the following examples
of permitted and prohibited types of communications for use on Channel 9. These are
guidelines and are not intended to be all-inclusive.
Permitted: “A tornado sighted six miles of town.”
Not Permitted: “This is observation post number 10. No tornado sighted.”
Fuse Connection
5. Connect the black lead to the negative side
of the automobile. This is usually the chassis.
Any convenient location with good electrical
contact (remove paint) may be used.
Included in this Package
NOTE
•
Before installing the CB radio, visually check the
vehicle battery connections to determine which
battery terminal, positive or negative (positive is
the larger of the two) is grounded to the engine
block (or chassis).
You should find all of the following items in this package:
CB Transceiver
Microphone
Transceiver Bracket
Microphone Connector
6. Mount the 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.
Microphone Bracket
Operating Manual
7. Attach the four pin microphone cable to receptacle
on front of unit and install unit in bracket securely.
2
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Operation
Operation
Operating Your Mobile Radio
Operation
Operating Your Mobile Radio
Operation
•
•
Antenna Connector
Turning on Your Mobile Radio
Antenna Connector
On-Off/Volume Knob
This female Connector on the rear panel permits
connection of the transmission line cable male
connector to the transceiver.
Turn the On-Off/Volume knob clockwise to turn
the power on and set the desired listening volume.
CB Antenna
External Speaker
Only a properly matched Antenna system will
allow maximum power output. In mobile installations
(cars, trucks, boats, etc.), an Antenna system that is
non-directional should be used. When installed in a
boat, the transceiver will not operate at maximum
efficiency 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.
The external speaker jack on the rear panel is used
for an External Speaker. 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 internal speaker is automatically disconnected.
External Speaker Jack
PA Speaker Jack
Power Cable
NOTE
Cobra external speakers are rated 15 watts.
Public Address (PA)
NOTE
Cobra loaded-type antenna models HGA 1000,
An external PA speaker may be connected
to the PA speaker jack when 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 PA at high output levels.
HGA 1500 and HGA 2000 are highly recommended
for most installations. Consult your Cobra dealer
for further details (or see order form on page 17).
Three-way combination antennas are available
which allow operation of all three bands (AM-FM
and 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.
Power
These wires supply Power to the CB radio.
This cable is permanently attached to the radio.
If you wish to remove the radio after installation,
disconnect at fuse holder and ground connector.
Microphone Connector
Microphone Connector
Allows for convenient removal of the Microphone plug
when storage is required. The Microphone MUST be
connected to the unit at all times, when in use, for
proper operation.
4
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5
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Operation
Operation
Operating Your Mobile Radio
Operation
Squelch
Operating Your Mobile Radio
Operation
•
•
Selecting a Channel
Channel Selector Knob
This control is used to cut off or eliminate receiver background noise in the absence
of an incoming signal. Adjust until the receiver noise disappears. This will require the
incoming signal to be slightly stronger than 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.
Rotate the Channel knob clockwise
until desired channel is displayed.
Squelch is the “control gate” for incoming signals.
To squelch your radio:
1. Full clockwise rotation closes the gate,
allowing only very strong signals to enter.
2. Full counterclockwise rotation opens
the “gate,” allowing all signals in.
Adjust Squelch/RF Gain Knob
Channel 9/NOR/Channel 19
Set CH 9 to obtain instant access
to the emergency channel.
Set NOR position to use the channel knob
to choose any of the 40 channels.
Channel 9/NOR/Channel 19 Button
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.
Set CH 19 to obtain instant access to
the information and calling channel.
CB/PA Button
CB/PA
In the CB position, the PA function is disabled
and the unit will transmit and receive on the
selected channel. The PA function should not
be used unless a PA speaker is connected. In the
PA position, the transmit function is disabled and
the microphone output will go only to the PA speaker.
Gate Open
Desired Squelch Setting (DSS)
Gate Closed
Strong Signals
Medium Signals
Weak Signals
Noise
Strong Signals
Medium Signals
Weak Signals
Noise
Strong Signals
Medium Signals
Weak Signals
Noise
S/RF Power Meter
S/RF Power Meter
RF Gain
Shows relative transmitter RF output power
and input signal strength when receiving.
The Liquid Crystal Display (LCD) segments
increase with signal strength.
This control is used to adjust receiver sensitivity. Maximum sensitivity allows
weak signals to be received. However, very strong signals (such as from a nearby
transmitter) can cause distortion at that setting. Adjust until the distortion disappears.
Reducing the receiver’s RF Gain eliminates distortion from very strong incoming signals.
To set RF Gain:
1. Full counterclockwise rotation minimizes
gain for maximum distortion control.
2. To achieve the desired level of distortion control,
turn the RF Gain knob counterclockwise until
the distortion is eliminated.
Adjust Squelch/RF Gain Knob
TX Indicator
TX Indicator
The TX Indicator will light when in the
transmit mode. “Busy” will appear when
there is an incoming signal.
3. After moving away from the strong signal,
turn the RF Gain knob fully clockwise to
receive all possible signals.
6
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Operation
Operation
Operating Your Mobile Radio
Operating Your Mobile Radio
Operation
Operation
•
•
Ignition Noise Interference
Operating Procedure to Receive
On-Off/Volume Knob
Use of a mobile receiver at low signal levels is normally limited by the presence
of electrical noise. 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 battery.
Even though this radio has an automatic noise limiter, in some installations
ignition interference may be high enough to make good communications
impossible. Consult your authorized Cobra dealer or a two-way radio technician
for help in locating and correcting the source of severe noise.
Be sure that power cord, antenna and microphone
are connected to the proper connectors before
proceeding further. The CB/PA switch should be
in the CB position.
To receive:
1. Turn the radio on by rotating the
On-Off/Volume knob clockwise.
2. Rotate the Squelch/RF Gain knob
counterclockwise until incoming
signal is heard.
Adjust Squelch/RF Gain Knob
3. Select the desired channel.
Temporary Mobile Operation
4. Set the On-Off/Volume knob and the
Squelch/RF Gain knob to a comfortable
listening level.
For Temporary Mobile Operation, you may want to purchase an additional cigarette
lighter adapter from your Cobra dealer. This adapter and a magnetic mount antenna
allow you to quickly “install” your transceiver for temporary use.
Temporary Mobile Operation
NOTE
Operating Procedure to Transmit
Red Wire is connected to positive side
Be sure the antenna is properly connected to the radio before transmitting.
Prolonged transmitting without an antenna, or with a poorly matched
antenna, could cause damage to the transmitter.
PA
EXT
ANT
of socket center tip. Black Wire is connected
to negative side contacts.
13.8V DC
Radio resets to CH 9 when connected to
cigarette lighter plug.
When using the unit with cigarette adapter,
turn off when not in use to avoid draining
the battery.
To transmit:
1. Select the desired channel.
Press-to-Talk Switch
2. The receiver and transmitter are controlled by
the Press-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.
8
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9
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Maintenance/Adjustment
Frequency Ranges
Operating Your Mobile Radio
Operating Your MobileRadio
Maintenance/Adjustment
Frequency Ranges
•
•
Your Cobra CB transceiver is specifically designed for the environment encountered
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.
The Cobra 19 DX IV transceiver represents one of the most advanced AM
two-way radios 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 CB channels.
1. Check connections to the source of power
Check Power Source
and make sure it is the 13.8 VDC required
to operate your radio.
CB
Channel
Channel Frequency
in MHz
CB
Channel
Channel Frequency
in MHz
2. Check the fuses in the DC power cord.
The main power lead (red) has a two amp
3AG type fuse in its holder. Use only the
above specified type and size fuse for
maximum protection. Failure to do so
1
2
26.965
26.975
26.985
27.005
27.015
27.025
27.035
27.055
27.065
27.075
27.085
27.105
27.115
27.125
27.135
27.155
27.165
27.175
27.185
27.205
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
27.215
27.225
27.255
27.235
27.245
27.265
27.275
27.285
27.295
27.305
27.315
27.325
27.335
27.345
27.355
27.365
27.375
27.385
27.395
27.405
3
4
Check Fuses in DC Power Cord
will void the warranty.
5
3. Make certain the microphone is properly
plugged in.
4. Make certain the antenna is properly
assembled and connected.
If you are unable to correct the problem,
refer to product service on page 14 for
the correct procedure for warranty and
post-warranty service from Cobra.
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Check Microphone Connection
Check Antenna Connection
10
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Warranty and Trademark
Acknowledgement
Specifications
Operating Your Mobile Radio
Warranty
Specifications
Limited One-Year Warranty
•
•
For Products Purchased in the U.S.A.
General
Channels
Cobra Electronics Corporation warrants that its Cobra CB radios, and the component
parts thereof, will be free of defects in workmanship and materials for a period of
one year from the date of first consumer purchase. This warranty may be enforced
by the first consumer purchaser, provided that the product is utilized within the U.S.A.
Cobra will, without charge, repair or replace, at its option, defective CB radios,
products or component parts upon delivery to the Cobra Factory Service department,
accompanied by proof of the date of first consumer purchase, such as a duplicated
copy of a sales receipt.
CB – 40 CH
Frequency Range
Frequency Tolerance
Frequency Control
Operating Temperature Range
Microphone
CB – 26.965 to 27.405 MHZ
0.005 %
PLL (Phase Lock Loop) Synthesizer
-30° C TO + 65° C
Plug-in dynamic
Input Voltage
13.8VDC nom. (negative ground)
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.
This warranty gives you specific legal rights, and you may also have other rights
which may vary from state to state.
Exclusions: This limited warranty does not apply: 1) To any product damaged
by accident; 2) In the event of misuse or abuse of the product or as a result of
unauthorized alterations or repairs; 3) If the serial number has been altered,
defaced or removed; 4) If the owner of the product resides outside the U.S.A.
All implied warranties, including warranties of merchantability and fitness for a
particular purpose are limited in duration to the length of this warranty. Cobra
shall not be liable for any incidental, consequential or other damages; including,
without limitation, damages resulting from loss of use or cost of installation.
Current Drain
Transmit: AM full mod., 1.4A (maximum)
Receive: Squelched, 0.9 A;
full audio output, 1.2A (nominal)
7
3
7
Size
6 ⁄8" D x 6 ⁄4" W x 1 ⁄8" H
3.25 lbs.
Weight
Antenna Connector
Meter
UHF; SO-239
LCD’s; indicates relative power
output and received signal strength
Transmitter
Power Output
4 watts
Modulation
AM (Amplitude Modulation)
300 to 3000 Hz
Some states do not allow limitations on how long an implied warranty lasts and/or
do not allow the exclusion or limitation of incidental or consequential damages,
so the above limitations may not apply to you.
Frequency Response
Output Impedance
50 ohms, unbalanced
For Products Purchased Outside the U.S.A.
Please contact your local dealer for warranty information.
Receiver
Sensitivity
Less than 1 µV for 10dB (S+N)
6 dB @ 7 KHz, 60 dB @ 10KHz
60 dB, typical
Selectivity
Trademark Acknowledgement
•
Cobra®, Nothing comes close to a Cobra® and the snake design are registered
trademarks of Cobra Electronics Corporation, USA. Cobra Electronics Corporation™
is a trademark of Cobra Electronics Corporation, USA.
Image Rejection
Adjacent-Channel Rejection
Automatic Noise Limiter
50 dB, typical
Built-in
12
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Product Service
Product Service
Customer Assistance
Customer Assistance
Product Service
For Products Purchased in Canada
•
For out of warranty service, ship prepaid this product to: AVS Technologies Inc.,
2100 Trans Canada Hwy S., Montreal, Quebec, H9P 2N4. We reserve the right to
repair or replace the radio with an equivalent product. Please include the following
information: Date of Purchase, Model Number, Dealer Purchased From,
Dealer Address, Dealer Phone Number.
If you have any questions about operation or installing your new
Cobra product, or if you are missing parts…
Please call Cobra first! DO NOT RETURN THIS PRODUCT TO THE STORE!
See customer assistance on page A1.
For Products Purchased in the U.S.A.
For Products Used in Canada
Industry Canada Notice
Operation is subject to the following two conditions: 1) this device may not cause
interference, and 2) this device must accept any interference, including interference
that may cause undesired operation of this device.
If your product should require factory service, please call Cobra first before sending
your radio. This will ensure the fastest turn-around time on your repair. You may be
asked to send your radio to the Cobra factory. It will be necessary to furnish the
following to have the product serviced and returned.
1. For warranty repair include some form of proof-of-purchase, such as a mechanical
reproduction or carbon of a sales receipt. If you send the original receipt, it cannot
be returned.
For Products Purchased Outside the U.S.A. or Canada
Please contact your local dealer for product service information.
2. Send the entire product.
3. Enclose a description of what is happening with the radio. Include a typed
or clearly printed name and address of where the radio is to be returned.
4. Pack radio securely to prevent damage in transit. If possible, use the original
packing material.
5. Ship prepaid and insured by way of a traceable carrier such as
United Parcel Service (UPS) or Priority Mail to avoid loss in
transit to Cobra Factory Service, Cobra Electronics Corporation,
6500 West Cortland Street, Chicago, Illinois 60707 U.S.A.
6. If the radio is in warranty, upon receipt of your radio it will either be
repaired or exchanged depending on the model.
Please allow approximately three to four weeks before contacting Cobra
for status. If the radio is out of warranty, a letter will automatically be sent informing
you of the repair charge or replacement charge. If you have any questions, please
call 773-889-3087 for assistance.
14
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