Cobra 25 LTD Classic How To Use Manual

How to Use Your

For Sales Information

Please Contact

RoadTrucker Inc

(www.RoadTrucker.com)

8312 Sidbury Rd.

Wilmington, NC 28411

[phone]
[phone]

For Sales Information Please Contact RoadTrucker Inc (www.RoadTrucker.com)

8312 Sidbury Rd.; Wilmington, NC 28411 - [phone] / [phone]

Contents

Features ..................................................................................................1

The CB Story .........................................................................................A1

FCC Regulations
FCC Warnings
Included Accessories

Controls & Indicators ........................................................................A2

Our Thanks to You..............................................................................A3

Customer Support

Installation

Location .............................................................................................2

Mounting and Connection .........................................................2

Antennas

CB Antenna.......................................................................................6

Marine Installation .........................................................................6

Ignition Noise Interference ............................................................7

Operating Your 25 LTD Classic

Turning On Your CB........................................................................8

Setting Channel Selector .............................................................9

To Receive..........................................................................................10

S-Meter ...............................................................................................11

NB/Off (Noise Blanker) Switch ...................................................12

Bright/Dim Switch ..........................................................................12

CB/WX Switch...................................................................................13

RF Gain Control................................................................................13

Setting Squelch ...............................................................................14

To Transmit........................................................................................16

Setting Dynamike® .........................................................................16

Transmit..............................................................................................17

RF Meter .............................................................................................17

External Speaker .............................................................................18

PA (Public Address) ........................................................................19

ANL (Automatic Noise Limiter) Switch ...................................21

Temporary Mobile Set-Up ...........................................................21

Home and Office Set-Up ..............................................................22

How Your CB Can Serve You...........................................................24

A Few Rules You Should Know ..................................................24

Channel 9 Emergency Messages ..............................................24

CB 10 Codes......................................................................................26

Frequency Ranges..............................................................................28

25 LTD Classic Specifications.........................................................29

Warranty Information.......................................................................30

Optional Accessories.........................................................................32

Accessory Order Info.........................................................................33

Trademark Acknowledgement.....................................................34

Cobra 25 LTD CLASSIC

Features of This Product

• 40 CB Radio Channels

• Heavy-Duty Dynamic
Microphone

• Full 4 Watts AM RF Power Output

• Instant Channel 9

• Front Panel 4-Pin Microphone
Connector

• Switchable Blanker

• Adjustable Dynamike Boost

• Tactile Controls

• 9 Ft Microphone Cord

• RF Gain

1

Installation

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Installation

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, 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 interfere with the driver 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.

3

Connect the antenna cable plug to the recep­tacle marked “ANT” on the back of the unit.

Note

Before installing the CB radio,
visually check the vehicle’s bat­tery connection to determine
which terminal, positive or
negative, is grounded (positive
is the larger of the two) to the
engine block (or chassis). A
negatively grounded vehicle
has its negative lead grounded
to the chassis.

Note

In positive ground vehicles the
red wire goes to the chassis and
the black wire is connected to
the ignition switch.

2

Drill the holes and secure the bracket.

continued

32

Installation

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Note

Connecting to an accessory fuse
prevents the unit from being left
on accidentally, and also per­mits operating the unit without
running the engine.

Note

In positive ground vehicles the
red wire goes to the chassis and
the black wire is connected to
the ignition switch.

4

In a negative grounded vehicle, connect the
red lead of the DC power cord to an accessory
12 volt fuse.

6

Plug power cable into back of unit marked
“Power”. Be sure to observe polarity markings.

7

Mount the microphone
bracket on the right side
of the unit (driver’s left)
using two screws sup­plied. Bracket should be
placed under the dash
so microphone is readily
accessible.

Installation

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.

Attach the 4-pin microphone cable to

8

receptacle on the front of the unit and
install unit in bracket securely.

54

Antennas

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Ignition Noise Interference

CB Antenna

Note

For optimum performance in
passenger cars the ideal anten­na location is on the center of
the roof. Second choice is on the
center of the trunk.

Note

Because many newer trucks
feature fiberglass door skins,
the outside mirror must be
grounded to the chassis..

Note

3-way Combination Antennas
are also available which allow
operation of all three bands
(AM-FM & CB), using a single
antenna. However, this type of
antenna usually results in less
than normal transmit and
receive range when compared
to a standard-type “Single
Band” CB antenna. Call

773.889.3087 for further infor­mation.

CB Antenna

Since the maximum allowable power output of
the transmitter is limited by the FCC, 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. Consult your Cobra dealer for
further details, or call 773.889.3087 and speak to
a Cobra representative.

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 a ground plate, (unless it
has a steel hull). Before attempting installation ,
consult your dealer for information regarding an
adequate grounding system and prevention of
electrolysis between fittings in the hull and water.

Use of a mobile receiver at low signal levels is
normally limited by the presence of electrical
noise. The primary source of noise in automobiles
is from the alternator and ignition system.
Typically, when signal level is adequate, the 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 25 LTD Classic 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

7

Operation

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Operation

Turning On Setting Channel

Turning On

Make sure the power cord, antenna and micro­phone 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

Selector

2

Rotate the On/Off Volume knob clockwise to
a normal listening level.

8

9

Operation

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Operation

To Receive

Selecting A
Channel

Note

Switch to 9 (Emergency) for
instant access to these channel.

To Receive

1

Rotate the On/Off Volume knob clockwise
the green RT/TX LED and channel display will
be illuminated.

Selecting A Channel

S-Meter

Swings proportionately to strength of incoming
signal when receiving.

S-Meter

1

Switch to NORMAL to select desired channel.

10

11

Operation

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Operation

NB, OFF
(Noise Blanker)
Switch

Note

The RF noise blanker is very
effective in reducing repetitive
noises such as ignition interfer­ence.

NB, OFF (Noise Blanker) Switch

1

When switched to NB position the RF Noise
Blanker is activated, providing increased noise
filtration.

When switched to OFF position Noise
Blanking Filtration will be turned off.

Bright/Dim Switch

1

Switch to BRT or DIM to control brightness
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/Dim
Switch

RF Gain Control

Note

The RF Gain is used to optimize
reception in weak signal areas.
Turn counterclockwise to reduce
gain.

1

Rotate the RF Gain knob counterclockwise
to reduce gain in strong signal areas. In weak
signal areas turn clockwise to increase gain.

1312

Operation

NOISE

WEAK SIGNALS

MEDIUM SIGNALS

STRONG SIGNALS

G AT E C L O S E D

NOISE

WEAK SIGNALS

MEDIUM SIGNALS

STRONG SIGNALS

NOISE

WEAK SIGNALS

MEDIUM SIGNALS

STRONG SIGNALS

G AT E 

O P E N

NOISE

WEAK SIGNALS

MEDIUM SIGNALS

STRONG SIGNALS

NOISE

WEAK SIGNALS

MEDIUM SIGNALS

STRONG SIGNALS

G AT E

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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 counterclockwise rotation opens the
“gate” allowing all signals in.

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.

Gate set to Desired
Squelch Setting (DSS)

1514

Operation

PUSH &
HOLD

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Operation

To Transmit

Caution!

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.

Be sure to read the F.C.C. Rules
and Regulations included with
this unit before transmitting.

Setting
Dynamike

®

To Transmit

1

Select desired channel.

Setting Dynamike®

This controls the microphone sensitivity
(outgoing audio level).

Transmit

1

Push and hold mic 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.

Transmit

RF Meter

1

Initially, set fully clockwise so that maxi­mum voice volume is available. Dynamike®
may have to be reduced in some conditions.

16

17

Operation

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Operation

External Speaker

Note

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.

Note

Cobra external speakers are
rated at 10 watts.

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.

PA (Public Address)

1

Connect an external PA speaker to the PA jack
on the rear panel.

PA (Public
Address)

Note

Speaker should have 8-ohm
impedance and be rated to
handle at least 4.0 watts.

Note

The speaker should be directed
away from the microphone to
prevent acoustic feedback.

Note

When the volume control is
rotated clockwise, activity on
the CB channel will be heard
through the PA speaker.

18

2

Set CB/ANL PA switch to PA position.

continued

19

Operation

PUSH &
HOLD

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3

Push and hold microphone button and speak
in a normal voice. Your voice will sound on the
PA speaker.

Temporary Mobile Set-Up

ANL (Automatic Noise Limiter) Switch

1

When switched to CB/ANL the Automatic
Noise Limiter is activated. This helps reduce
noise created by the vehicle’s electronics.

Temporary Mobile Operation

For temporary mobile operation you may want to
purchase an optional cigar 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 Set-Up

4

Adjust PA speaker volume with the

Dynamike control.

20

21

Home And Office Set-Up

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Home And Office Set-Up

Base Station
Operation
(From 120V AC
House Current)

Warning!

Do not attempt to operate this
transceiver by connecting it
directly to 120 vac.

Note

For further information call
Cobra Customer Service

1.773.889.3087.

Base Station Operation
(From 120V AC House Current)

To operate your transceiver from home or office
you will need a 13.8 volt DC Power Pack rated at a
minimum of 2 amps, and a properly installed
base station antenna.

1

Simply connect the red (+) and black (-)
leads of the transceiver to the corresponding
terminals of the power pack.

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.

22

23

How Your CB Can Serve You

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How Your CB Can Serve You

A Few Rules
You Should
Know

Channel 9
Emergency
Messages

Note

If no response on channel 9,
try channels 19 or 14.

• Warn of traffic problems

• Provide weather and road data

• Provide help in event of an emergency

• Provide direct contact with home or office

• Assist police by reporting erratic drivers

• Get “local information” to find destination

• Communicate with family and friends

• Suggest spots to eat and sleep

• Keep you alert while traveling

A Few Rules You Should Know

A. Conversations cannot last more than 5 minutes

with another station. A one minute break is
required to let others use the channel.

B. You cannot blast others off the air by use of

illegally amplified transmitters or illegally

high antennas.
C. You cannot use CB to promote illegal activities.
D. Profanity is not allowed.
E. You may not transmit music with a CB.
F. Selling of merchandise and/or services is

prohibited.

1. Set to channel 9 for emergencies

Be sure antenna is properly connected.

2. CB Distress Data

When transmitting an emergency, you should

request a “REACT BASE” and provide the CB

distress data (called CLIP):

C all Sign Identify yourself.

L ocation Be exact.

I njuries Number. Type. Trapped?

P roblem Give details and help needed.

Transmit CLIP repeatedly so any monitor can assist.

The FCC gives these examples of permitted and
prohibited messages for channel 9. These are
only guidelines and not all-inclusive:

Permitted Example Message

Yes “Tornado sighted six miles north

of town.”

No “Post number 10.

No tornado sighted.”

Yes “Out of gas on I-95 at mile

marker 211.”

No “Out of gas in my driveway.”

Yes “Four car accident on I-94 at

Exit 11. Send police and
ambulance.”

No “Traffic moving smoothly on I-94.”

Yes “Weather Bureau has issued

thunderstorm warning.
Bring sailboat into port.”

No “Attention motorists.

Weather Bureau advises snow
tomorrow will accumulate
4 to 6 inches.”

Yes “Fire in building at 539 Main,

Evanston.”

No “Halloween patrol number 3.

All quiet.”

2524

How Your CB Can Serve You

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How 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
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

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/roads
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

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 Wrecker needed at

10-38 Ambulance needed

10-39 Message delivered

10-41 Turn to channel

10-42 Traffic accident at

10-43 Traffic tie up 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

2726

25 LTD Classic SpecificationsFrequency Ranges

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The COBRA 25 LTD Classic transceiver represents
one of the most ad vanced AM two-way radios used
as a Class D station in the Citizens Radio Service.
This unit features advanced Phase Lock Loop (PLL)
circuitry providing complete cov er age of all 40 CB
chan nels.

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

GENERAL

CHANNELS . . . . . . . . . . . . . . . . . . . . . . . . CB - 40 CH

FREQUENCY RANGE. . . . . . . . . . . . . . . . CB - 26.965 TO 27.405 MHz

FREQUENCY TOLERANCE . . . . . . . . . . . 0.005 %

FREQUENCY CONTROL . . . . . . . . . . . . PLL (PHASE LOCK LOOP) SYNTHESIZER

OPERATING TEMPERATURE

RANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30° C TO + 50° C

MICROPHONE . . . . . . . . . . . . . . . . . . . . . PLUG-IN DYNAMIC

INPUT VOLTAGE . . . . . . . . . . . . . . . . . . . 13.8VDC nom. (positive or negative ground)

CURRENT DRAIN TRANSMIT: AM FULL MOD., 1.5A

SIZE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8-5/8” D X 6-3/8” W X 2-13/64” H

WEIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 lbs.

ANTENNA CONNECTOR . . . . . . . . . . . .UHF; SO -239

SEMICONDUCTORS . . . . . . . . . . . . . . . .33 TRANSISTORS, 28 DIODES,

METER . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ILLUMINATED; INDICATES RELATIVE

TRANSMITTER

POWER OUTPUT . . . . . . . . . . . . . . . . . . .4 WATTS

MODULATION . . . . . . . . . . . . . . . . . . . . . .AM (AMPLITUDE MODULATION)

FREQUENCY RESPONSE . . . . . . . . . . . .300 TO 3000 Hz

OUTPUT IMPEDANCE . . . . . . . . . . . . . . .50 OHMS, UNBALANCED

RECEIVER

SENSITIVITY . . . . . . . . . . . . . . . . . . . . . . . .LESS THAN 1 µV FOR 10dB (S+N) /N

SELECTIVITY . . . . . . . . . . . . . . . . . . . . . . .6 dB @ 7 kHz, 60 dB @ 10kHz

IMAGE REJECTION . . . . . . . . . . . . . . . . .80 dB, TYPICAL

ADJACENT-CHANNEL REJECTION . . .60 dB, TYPICAL

IF FREQUENCIES . . . . . . . . . . . . . . . . . . .DOUBLE CONVERSION: 1st: 10.695 MHz

AUTOMATIC GAIN CONTROL (AGC) .LESS THAN 10 dB CHANGE IN AUDIO

RF GAIN CONTROL . . . . . . . . . . . . . . . . .ADJUSTABLE FOR OPTIMUM SIGNAL

NOISE BLANKER . . . . . . . . . . . . . . . . . . . .RF TYPE

SQUELCH . . . . . . . . . . . . . . . . . . . . . . . . . .ADJUSTABLE; THRESHOLD LESS THAN 1µV

AUDIO OUTPUT POWER . . . . . . . . . . . .4 WATTS

FREQUENCY RESPONSE . . . . . . . . . . . .300 TO 3000 Hz

DISTORTION . . . . . . . . . . . . . . . . . . . . . . .LESS THAN 7% @3 WATTS @ 1000 Hz

BUILT-IN SPEAKER . . . . . . . . . . . . . . . . . .8 OHMS, 5W

EXTERNAL SPEAKER (NOT SUPPLIED) .8 OHMS; DISABLES INTERNAL SPEAKER

PA SYSTEM

POWER OUTPUT . . . . . . . . . . . . . . . . . . .4 WATTS INTO EXTERNAL SPEAKER

EXTERNAL SPEAKER FOR PA . . . . . . . .8 OHMS, WHEN PA-CB SWITCH IS IN PA,

(NOT SUPPLIED) . . . . . . . . . . . . . . . . . . .THE PA SPEAKER ALSO MONITORS THE

(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)

(MAXIMUM) RECEIVE: SQUELCHED, 0.3A;
FULL AUDIO OUTPUT, 1.2A (NOMINAL)

3 INTEGRATED CIRCUITS

POWER OUTPUT AND RECEIVED
SIGNAL STRENGTH

2nd: 455 kHz

OUTPUT FOR INPUTS FROM 10 TO 50,000
MICROVOLTS

RECEPTION

WHEN CONNECTED

RECEIVER; SEPARATE JACK PROVIDED

2928

Limited Two Year Warranty

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Optional Accessories

Cobra Electronics
Corporation

6500 West Cortland Street
Chicago, Illinois 60707

For Products Purchased In The U.S.A.

Cobra Electronics Corporation warrants that its Citizens
Band radio, and the component parts thereof, will be free
of defects in workmanship and materials for a period of
two (2) years 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 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.

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 mer-

chantability 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.

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.

For Products Purchased Outside The U.S.A.

Please contact your local dealer for warranty information.
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.

Replacement DC Power Cord

For in vehicle use
426-002-N-001

Replacement Microphone
Bracket

For in vehicle use
741-080-9-001

Replacement Dynamic
Microphone

For in vehicle use
CA 73

Replacement Mounting
Bracket

For in vehicle use
251-199-9-001

21” Base Loaded Magnet
Mount Antenna

HG A1000

Replacement Thumb Screws

For in vehicle use
634-081-9-001

38” Base Loaded Magnet
Mount Antenna

HG A1500

30

31

4 Pin Replacement Dynamic

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Microphone

HG M73

Dynamic External Speaker

HG S100

Power Microphone

HG M75

Noise Canceling External
Speaker

HG S300

4 Pin Noise Canceling
Microphone

HG M77

Noise Canceling With Talk
Back External Speaker

HG S500

Accessory Order InfoOptionalAccessories

Ordering From U.S.A.

Call 773-889-3087 for pricing or
visit www.cobra.com.

For Credit Card Orders

Call 773-889-3087 [Press one from
the main menu] 8:00 a.m. to
5:30 p.m. Central Time, Monday
through Friday.

Make Check or Money Order
Payable To

Cobra Electronics, Attn: Accessories
Dept., 6500 West Cortland Street,
Chicago, IL 60707 U.S.A.

To Order Online

Please visit our website:
www.cobra.com

Item # Description

426-002-N-001 Replacement DC Power Cord

251-353-9-001 Replacement Mounting Bracket

634-081-9-001 Replacement Thumb Screws

741-080-9-001 Replacement Microphone Bracket

HG A1000 21” Base Loaded,

HG A1500 38” Base Loaded,

HG M84 4 Pin Premium Noise-Cancelling

HG M84W 4 Pin Premium Noise-Cancelling

HG M73 4 Pin Replacement Dynamic

HG M77 4 Pin Noise-Cancelling

HG M75 Power Microphone

HG S100 Dynamic External Speaker

HG S300 Noise-Cancelling External Speaker

HG S500 Noise-Cancelling with Talk Back

Magnetic Mount Antenna

Magnetic Mount Antenna

Microphone

Microphone (Wood Grain)

Microphone

Microphone

External Speaker

Optional Accessories

You can find quality Cobra products and
accessories at your local Cobra dealer, or in the
U.S.A., you can order directly from Cobra.
See ordering info on page 33.

3332

Trademark Acknowledgement

For Sales Information Please Contact RoadTrucker Inc (www.RoadTrucker.com)

8312 Sidbury Rd.; Wilmington, NC 28411 - [phone] / [phone]

Cobra®, Dynamike®, 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.

34

25 LTD Classic

©2009 Cobra Electronics Corporation
Printed in China
Part No. 545-023-N-001 Version C

CB Radio

Operating Instructions
for your Cobra 25 LTD Classic

DYNAMIKE

RX / TX

RF GAIN

MIN

MIN

MAX

25 LTD

CLASSIC

CH9

BRT

NB

PA

OFF

DIM

NORMAL

CB/
ANL

Nothin g Co mes Cl ose to a C obr a®

The Cobra Electronics Corporation

For Sales Information Please Contact RoadTrucker Inc (www.RoadTrucker.com)

8312 Sidbury Rd.; Wilmington, NC 28411 - [phone] / [phone]

For Sales Information Please Contact RoadTrucker Inc (www.RoadTrucker.com)

8312 Sidbury Rd.; Wilmington, NC 28411 - [phone] / [phone]

™

line of quality products includes:

CB Radios

®

microTALK

Radar/Laser Detectors

Safety Alert

HighGear

CobraMarine

Power Inverters

Accessories

For more information or to
order any of our products,
please visit our website:

www.cobra.com

Cobra Electronics Corporation
6500 West Cortland Street
Chicago, IL 60707

Radios

®

Traffic Warning Systems

®

Accessories

®

VHF Radios

25 LTD Classic

Operating Instructions
for your Cobra 25 LTD Classic

CB Radio

©2010 Cobra Electronics Corporation
Printed in China
Part No. 545-023-N-001 Version F

Nothing Comes Close to a Cobra®

The CB Story

The Citizens Band lies between the shortwave
broadcast and 10-meter Amateur radio bands,
and was established by law in 1949. The Class D
two-way communications service was opened in

1959. (CB also includes a Class A citizens band

2

1

3

4

5

and Class C remote control frequencies.)

FCC Regulations

FCC regulations permit only “transmissions”
(one party to another) rather than “broadcasts”
(to a wide audience). Thus, advertising is not
allowed on CB Channels because that is “broad­casting.”

FCC Warnings

All transmitter adjustments other than those
supplied by the manufacturer as front panel
operating controls, must be made by, or under
the supervision of, the holder of an FCC-issued
general Radio-Telephone Operator’s License.

Replacement 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.

You should read and understand Part 95 (included
with this unit) of the FCC Rules and Regulations,
before operating your Cobra radio, even though
the FCC no longer requires you to obtain an oper­ator’s license.

What’s Included with Your 25 LTD Classic

1. CB transceiver 6. DC power cord

2. Microphone 7. FCC rules

3. Transceiver bracket 1. (not shown)

4. Microphone bracket

5. Operating Manual

A1

Controls and Indicators Our Thanks to You

For Sales Information Please Contact

RoadTrucker Inc (www.RoadTrucker.com)

8312 Sidbury Rd.

Wilmington, NC 28411

[phone] / [phone]

For Sales Information Please Contact RoadTrucker Inc (www.RoadTrucker.com)

8312 Sidbury Rd.; Wilmington, NC 28411 - [phone] / [phone]

Thank you for purchasing the Cobra 25 LTD Classic
CB Radio. Properly used, this Cobra product will give

1. 4-Pin Microphone Connector

2. Power On/Off/Volume/

Squelch

3. Dynamike

4. RF Gain

5. Channel Selector

6. LED Channel Display

7. RX (Receive)/ TX (Transmit)

LED Indicator

8. Channel 9/ Normal Switch

9. Dimmer Switch

10. NB/Off Switch

11. CB/ANL PA Switch

12. Signal Strength Meter

13. Microphone

Back Side

14. Public Address Jack

15. External Speaker Jack

16. Antenna Connector

17. Power Jack

12

13

8

9

10

11

7

6

1

2 3 4 5

you many years of reliable service.

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:

For Assistance in the U.S.A.

Automated Help Desk English only, 24 hours a day,
seven (7) days a week 773-889-3087 (phone).

Customer Assistance Operators English
and Spanish.

8:00 a.m. to 5:30 p.m. Central Time 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.

www.cobra.com (online: Frequently Asked Questions).
English and Spanish. [e-mail] (e-mail).

Notes

14 15

16

17

A2

For Assistance Outside the U.S.A.

Contact Your Local Dealer

A3

35