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Cobra 18 WX ST II Operation Manual

Made by: Cobra
Type: Operation Manual
Category: Radio
Pages: 16
Size: 1.59 MB

 

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1

Contents

Features

   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .1

The CB Story

 .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . A1

    Licensing/Warning/Included Accessories   .  .  .  .  .  . A1

Controls and Indicators

 .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . A2

Our Thanks to You

 .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . A3

 

Customer Support   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . A3

Operating Your CB Mobile Radio 

Installation/Connection .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .2

Turning On .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .4

CB Antenna   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .4

Microphone Connector  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .5

Squelch   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .5

Setting Squelch   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .6

Channel Selection  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8

Channel 9/19 .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8

CB/Weather   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .8

Dual Watch .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .

Scan   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .9

Soundtracker System  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .10

Activating Soundtracker System   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .11

S/RF Power Meter   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .12

RX/TX Indicator LED   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .12

Antenna Connector   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .13

External Speaker   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .13

Power .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .13

Ignition Noise Interference   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .14

Temporary Mobile Operation  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .14

Operation to Receive/Transmit .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .15

Maintenance  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .16

Frequency Ranges .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .18

Specifications

 .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .19

Accessories .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 20, 21

Accessories Order Info .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .22

Warranty

   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .23

If You Think You Need Service

   .  .  .  .  .  .  .  .  .  . Back Cover

Features of This Product

•  40 CB Radio Channels
•  10 Weather Channels
• Soundtracker

®

 

System

•  Instant Channel 19 and 9
•  40 Channel Scan
•  Dual Watch
•  Front Firing Speaker
•  Channel Saver Circuitry
•  Dynamic Microphone
•  9 Foot Mic Cord
•   Front Panel Microphone 

Connector

How to Use Your  

Cobra 18WXST II

 


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3

Connect the red lead of DC power cord to an 

accessory 12 volt fuse .

Connect the orange lead to a constant 12v fuse 

(ie: cigarette lighter or direct to battery)

Connect the black lead to the negative side of 

the au to mo bile . This is usually the chassis . Any 

con ve nient location with good electrical contact 

(remove paint) may be used .

Mount the microphone bracket on right side of 

the transceiver or near it using two screws sup-

plied . When mount ing in an automobile, place 

the bracket under the dash so the microphone 

is readily accessible .

Attach the 4-pin microphone cable to recep-

tacle on front of unit and install unit in brack-

etsecurely .

Mounting and 

Connections

Note

 Before installing the CB radio, 
visually check the ve hi cle bat­
tery connections to determine 
which battery ter mi nal, posi­
tive or negative (positive is the 
larger of the two) is grounded 
to the engine block  
(or chassis).

 

Operation

2

Mounting and Connections

Select a location for the transceiver and micro-

phone bracket that is con ve nient for operation .  

In automobiles, the transceiver is usually mount-

ed to the underneath of the dash panel, with the 

microphone bracket beside it .

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 .

Drill necessary holes and secure mounting 

bracket  in  lo ca tion . 

Connect the antenna cable plug to the re cep ta-

cle marked “ANT” on the back of the unit .

Mounting and 

Connections

Note

The transceiver is held in the 
universal mounting bracket by 
two thumb screws, permitting 
adjustment at the most con ve­
nient angle.

A universal mounting bracket 
is supplied along with self tap­
ping screws and star washers.  
To mount the transceiver:

 

Operation

 

Installation

 

Installation

CB Tranceiver

EXT. SPKR.

POWER

13.8V DC

ANTENNA

SQUELCH

VOLUME

DW

SCAN S    1      3      5      9    +30

P   .5      1      2       3      4

CB / WEATHER

CH 9 / 19

18 WX ST II

CB Transceiver

 


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5

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 .

Squelch

This control is used to cut off or elim i nate receiver 

background noise in the absence of an incoming 

signal .  Adjust until the receiver noise disappears . 

This will require the incoming signal to be slight-

ly 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 maxi-

mum clockwise setting . 

Microphone 

Connector

 

Operation

OFF

OFF

Squelch

SHIELD

AUDIO

RX

TX

1

2

3

4

4

Turning on

Turn volume control clockwise to turn power on 

and set the desired listening volume .

CB Antenna

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 .

Turning on 

Your Radio

 

Operation

CB Antenna

OFF

Note

Cobra load ed­type antenna 
models HGA 1000, HGA 1500, 
and HGA 2000 are highly rec­
om mend ed for most instal­
lations.  Consult your Cobra 
dealer for further details (or see 
order form at the back of  
this book).
3­Way Combination Antennas 
are available which allow op er­
a tion of all three bands (AM­FM 
& CB), using a single antenna. 
However, use of this type of 
antenna usually results in less 
than normal transmit and 
receive range when com pared 
to a standard­type “Single 
Band” antenna designed for  
CB only.

 


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NOISE

WEAK SIGNALS

MEDIUM SIGNALS

STRONG SIGNALS

GA

TE CL

OSED

NOISE

WEAK SIGNALS

MEDIUM SIGNALS

STRONG SIGNALS

NOISE

WEAK SIGNALS

MEDIUM SIGNALS

STRONG SIGNALS

GA

TE 

OPEN

NOISE

WEAK SIGNALS

MEDIUM SIGNALS

STRONG SIGNALS

7

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 .

 

Operation

NOISE

WEAK SIGNALS

MEDIUM SIGNALS

STRONG SIGNALS

GA

TE 

Gate set to Desired  

Squelch Setting (DSS)

OFF

6

 

Operation

Gate open

Gate closed

Setting 

Squelch

Setting Squelch 

Squelch is the “control gate” for incoming sig-

nals .

 

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 . 

OFF

OFF

 


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9

Dual Watch

This features allows the user to scan between two 

selected channels .

1.  

Select first channel, CB mode .

2.  

Press and hold DW until LED begins flashing and 

beeps once .

3. 

 Select second channel . Press DW until LED lights 

steady and radio beeps twice .  Two channels are 

now stored in DW memory .

Scan

Press and release SCAN button to activate CB scan 

mode . If the radio is squelched, radio begins to 

scan .
When scan is interrupted by a signal, scan stops and 

holds until loss of signal . Press PTT on mic to stop 

scan function .  Press Scan to restart CB scan .

Channel 

Selection

 

Operation

8

Set CB or WX Mode

Set on CB mode .  Rotate channel knob clockwise 

until desired channel is displayed .

Channel 9/Channel 19

Press CH 9/19 to obtain instant access  to emergency 

channel 9 . Press again for information CH 19 . 

CB/Weather

CB mode is for normal CB operation . Press CB/

Weather again and select active Weather channel in 

your area .

 

Operation

OFF

OFF

PRESS AND RELEASE

OFF

Channel 9/ 

Channel 19

CB Weather

Dual Watch

Note

The radio needs to be 
squelched before DW can 
monitor both channels.

OFF

Scan

Note

On some channels squelch  
setting might have to be re­set.

PRESS AND HOLD

OFF

PRESS AND RELEASE

PRESS AND RELEASE

 


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11

Activating Soundtracker
1. 

Press the SoundTracker button on the upper 

left side of front panel . A red indicator will  

illuminate when the SoundTracker system is 

engaged .

Activating 

Soundtracker

 

Operation

10

The SoundTracker System reduces noise while 

leaving the signal intact in the reception mode . 

In the transmission mode, it strengthens the sig-

nal, providing you with a significant reduction in 

noise on reception and transmission .

How SoundTracker works
On Reception–

“Cuts Noise Coming In”

With a normal CB, distant signals fall below 

the squelch level and are unintelligible . 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”

A SoundTracker 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 .

Soundtracker 

System

 

Operation

OFF

PUSH AND RELEASE

USPat. No. 6,038,429

 


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13

Rear Panel
Antenna Connector. 

This female connector per-

mits connection of the transmission line cable 

male con nec tor to the transceiver .

External Speaker. 

The External Speaker Jack is 

used for an external speaker . The external speak-

er 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 .

Power: 

This cable is permanently attached to the 

radio . If you wish to remove the radio after instal-

lation, dis con nect at fuse holder and ground  

connector . 

Antenna 

Connector

 

Operation

12

S/RF Power Meter

Shows relative transmitter RF output power and 

input signal strength when receiving . The LED 

(Light Emitting Diode) segments glow green to 

amber to red . . .this indicates receive or transmit 

activity .

RX/TX Indicator LED

RX indicator will light when in the receive mode . 

TX indicator lights when in transmit mode . 

When weather channel is selected, WX indicator is 

illuminated,  and the channel is displayed .

S/RF 

PowerMeter

 

Operation

OFF

OFF

RX/TX 

Indicator LED

External 

Speaker

EXT. SPKR.

POWER

13.8V DC

ANTENNA

Power

Note

Cobra external speakers are 
rated 15 watts

 


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15

Operating Procedure to Receive
1. 

Be sure that power cord, antenna and microphone are connected to the 

proper connectors before proceeding further . The weather switch should 

be in the “CB” position .

2. 

Turn the radio ON by rotating the  VOLUME CONTROL clockwise .

3. 

Rotate SQUELCH CONTROL counterclockwise until incoming signal is 

heard .

4. 

Select the desired channel .

5. 

Set VOLUME CONTROL  to a comfortable listening level .

6. 

Engage the SoundTracker system by depressing the button labeled ST .

Listen to the background noise from the speaker . Turn the SQUELCH 

CONTROL slowly clockwise until the noise JUST disappears (no signal 

should be present) . Leave the control at this setting . The squelch is now 

properly adjusted . The receiver 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 . The revolutionary SoundTracker system allows you to 

reduce unwanted background noise (static) and increase the signal for bet-

ter reception .

Operating Procedure to Transmit
1. 

Select the desired channel .

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 micro-

phone two inches from the mouth and speak clearly in a normal voice .

Be sure the antenna is properly connected to the radio before transmit-

ting. Prolonged transmitting without an antenna, or a poorly matched 

antenna, could cause damage to the transmitter. 

 

Operation

14

Ignition Noise Interference

Use of a mobile receiver at low signal levels is nor-

mally 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 transceiv-

er 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 lim-

iter, in some installations ignition interference may 

be high enough to make good communications 

impossible . Consult your COBRA dealer or a 2-way 

radio technician for help in locating and correcting 

the source of severe noise .

Temporary Mobile Operation

For temporary mobile operation, you may want to 

purchase an additional cigarette lighter adapter 

from your COBRA dealer . This adapter and a mag-

netic mount antenna allow you to quickly “install” 

your transceiver for temporary use .

 

Operation

Ignition Noise 

Interference

Temporary 

Mobile 

Operation

Note

Red and Orange wires are  
connected to positive side of 
socket center tip. Black wire is 
connected to negative side  
contacts. 

Note

Radio resets to CH 9 when con­
nected to cigarette lighter plug.

EXT

ANT

13.8V DC

PA

Note

When using the unit with cig­
arette adapter, turn off when 
not in use to avoid draining  
the  battery.

 


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16

Maintenance/ 

Adjustment

 

Maintenance

Maintenance and Adjustment

Your COBRA CB transceiver is specifically 

designed for the environment encountered in 

mobile installations . The use of all solid state cir-

cuitry and its light weight result in high reliabil-

ity . Should a failure occur, however, review the 

following, then if necessary, replace parts only 

with identical parts . Do not substitute .

1. 

Check connections to the source of power and 

make sure it is the 13 .8 VDC required to oper-

ate your radio .

2. 

Check the fuses in the DC power cord . The 

main power lead (red & orange wire) has a 2 

amp 3AG type fuse in its holder . Use only the 

above specified type and size fuse for maxi-

mum 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 assem-

bled and connected .

If you are unable to correct the problem, refer 

to the  SERVICE INSTRUCTIONS at the end of this 

manual for the correct procedure for warranty 

and post-warranty service from COBRA . 

Permitted: 

“A tornado sighted six miles of town .”

Not Permitted : 

“This is observation post number 10 .   

No tornado sighted .”

 

Warning

17

Channel 9 

Emergency 

Mes sag es

Replacement Warning

Replacement or substitution of certain parts with 

re place ments 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, be sure to re-read 

applicable portions of this instruction manual to 

make certain you are following correct procedure 

and that the radio was prop er ly installed, etc .

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 with-

out 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 over-

powering them with illegally amplified transmitter power 

or illegally high antennas .

3. 

You can’t use CB to promote illegal activities .

4. 

You are not allowed to use profanity .

5. 

You may not play music in your CB .

6. 

You may not use your CB to sell merchandise or pro fes-

sion al  service .

Use Channel 9 For Emergency Mes sag es Only

The FCC gives the following examples of permit-

ted and pro hib it ed types of communications for 

use on Channel 9 . These are guidelines and are 

not intended to be all-inclusive .

A Few Rules 

You Should 

Know

 


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19

Accessories

18

Specifications

 

Specifications

GENERAL

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

                                                                 WEATHER – 10CH

FREQUENCY RANGE   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .CB - 26 .965 TO 27 .405 MHZ

                                                                 WEATHER – 161 .650 TO 163 .275

FREQUENCY TOLERANCE   .  .  .  .  .  .  .  .  .  .  .0 .005 %

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

OPERATING TEMPERATURE 

RANGE  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .-30° C TO + 65° C

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

INPUT VOLTAGE    .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 13 .8VDC nom . (negative ground) 

CURRENT DRAIN 

TRANSMIT: AM FULL MOD ., 1 .4A  (MAXIMUM) 

                                                                 RECEIVE: SQUELCHED, 0 .9 A;

                                                                 FULL AUDIO OUTPUT, 1 .2A (NOMINAL)

SIZE     .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 6-7/8” D X 6-3/4” W X 1-7/8” H

WEIGHT   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 4 .25 LBS .

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

METER  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . LED; INDICATES RELATIVE POWER 

                                                                OUTPUT AND RECEIVED SIGNAL STRENGTH

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) 

SELECTIVITY   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 6 dB @ 7 KHZ, 60 DB @ 10KHZ

IMAGE REJECTION  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 60 dB, TYPICAL

ADJACENT-CHANNEL REJECTION  .  . 50 dB, TYPICAL

ATOMATIC NOISE LIMITER  .  .  .  .  .  .  .  .  . BUILT-IN

WEATHER

SENSITIVITY   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . LESS THAN 1 ΜV FOR 12 dB SINAD

IF-FREQUENCY   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . DUAL CONVERSION

AUDIO OUTPUT   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . MAXIMUM 1 W AT 10% DISTORTION

FREQUENCY RESPONSE    .  .  .  .  .  .  .  .  .  .  . 300 – 3000 HZ AT -6 dB

 

Frequency Ranges

The COBRA 18 WX ST II 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 pro-

viding complete cov er age of all 40 CB chan nels and all 

10 weather channels as shown below .

 

1  

26 .965  21 

27 .215 

2  

26 .975  22 

27 .225 

3  

26 .985  23 

27 .255 

4   27 .005 24 

27 .235  

 

 

5  

27 .015  25 

27 .245 

6  

27 .025  26 

27 .265 

7  

27 .035  27 

27 .275 

8  

27 .055  28 

27 .285 

9  

27 .065  29 

27 .295 

10  

27 .075  30 

27 .305

11  

27 .085  31 

27 .315

12  

27 .105  32 

27 .325

13  

27 .115  33 

27 .335

14  

27 .125  34 

27 .345

15  

27 .135  35 

27 .355

16  

27 .155  36 

27 .365

17  

27 .165  37 

27 .375

18  

27 .175  38 

27 .385

19  

27 .185  39 

27 .395

20  

27 .205  40 

27 .405

  

Channel    

Channel

CB 

Freq. 

CB  

Freq. 

Channel  In MHz  Channel  In MHz 

 Weather

Weather  

Freq. 

Channel  In MHz

1 162 .550 

2 162 .400

3 162 .475

4 162 .425

5 162 .450

6 162 .500

7 162 .525

8 161 .650

9 161 .775

 


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20

 

Accessories

Replacement Mounting 

Bracket

251­199­9­001 $4.50

Replacement Thumb Screws

634­081­9­001 $0.60

Replacement Microphone 

Bracket

741­080­9­001 $0.45

38” Base Loaded Magnet 

Mount Antenna

HG A1500 

$46.95

21” Base Loaded Magnet 

Mount Antenna

HG A1000 

$28.95

Dynamic External Speaker

HG S100 

$21.95

Noise Canceling External 

Speaker

HG S300 

$28.95

Dynamic Noise Canceling With 

Talk Back External Speaker

HG S500 

$32.95

 

Accessories

21

4-Pin Power Microphone 

HG M75 

 $25.95

4-Pin Noise Canceling 

Microphone

HG M77 

$30.95

4-Pin Replacement Dynamic 

Microphone

HG M73 

 $19.95

4 Pin Premium Noise-

Cancelling Microphone

HG M84 

$74.95

4 Pin Premium Noise-

Cancelling Microphone

Wood Grain

HG M84W 

$74.95

5 Pin Premium Noise-

Cancelling Microphone

HG M85 

$74.95

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 22.

 


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23

 

Limited Two Year Warranty

Limited Warranty

COBRA ELECTRONICS CORPORATION 

warrants that its COBRA 

CB Transceiver, and the component parts thereof, will be free 
of defects in material and workmanship for a period of two (2) 
years from the date of 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, a 
defective CB Transceiver upon delivery to the COBRA factory 
Service Department, accompanied by proof of the date of first 
consumer purchase, such a duplicated sales receipt .
You must pay initial shipping charges required to ship the prod-
uct for warranty service, but the return charges will be at COBRA’S 
expense, if the product is repaired or replaced under warranty .

Exclusions: 

This limited warranty does not apply; 1) to any prod-

uct 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 merchantabil-
ity 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 result-
ing 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 limita-
tions may not apply to you.

Cobra Electronics 
Corporation

6500 West Cortland Street
Chicago, Illinois 60707 USA

 

Accessories Order Info 

22

251-199-9-001  Replacement Mounting Bracket 

       

634-081-9-001  Replacement Thumb Screws 

      

741-080-9-001  Replacement Microphone Bracket         
HG A1000 

21” Base Loaded Magnetic Mount Antenna            

HG A1500 

38” Base Loaded Magnetic Mount Antenna

      

HG M84 

4 Pin Premium Noise-Cancelling Microphone

    

HG M84W 

4 Pin Premium Noise-Cancelling Mic Wood gr  

  

HG M85 

5 Pin Premium Noise-Cancelling Microphone

    

HG M73 

Replacement Dynamic Microphone     

HG M75                Power Microphone                                    
HG M77 

Noise Canceling/Power Microphone     

HG S100 

Dynamic External Speaker 

    

HG S300 

Noise Canceling External Speaker     

HG S500 

Dynamic Noise Canceling  

 

With Talk Back External Speaker 

   

Item # 

         Description

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

Cobra®, HighGear®, SoundTracker®, 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 .

 


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Notes           

The Cobra line of quality products  

also includes:

• 

CB Radios

• 

microTALK® Radios

• 

Radar/Laser Detectors

• 

Safety Alert® Traffic Warning Systems

• 

HighGear® Accessories

• 

CobraMarine® VHF Radios

• 

Power Inverters

• Accessories

Nothing Comes Close to a Cobra

®

 


background image

Cobra Electronics Corporation 

6500 West Cortland Street 

Chicago, IL 60707 USA

©2009 Cobra Electronics Corporation
Printed in China
Part No. 480-315-P-001     Version B

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.

A Consumer Service Representative can be reached through this same number  

8:00 am - 5:30 pm, Monday through Friday, Central Time.

Technical assistance is also available on-line in the Frequently Asked Questions (FAQ)  

section at www.cobra.com or by e-mail to productinfo@cobra.com

 If you think you need service call 1.773.889.3087

If your product should require factory service please call Cobra first before sending in your unit.  

This will ensure the fastest turn-around time on your repair.  

You may be asked to send your unit to the Cobra factory . It will be necessary to furnish the follow-

ing in order 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 .

2 .  Send the entire product .
3 .    Enclose a description of what is happening with the unit . Include a typed or clearly print name 

and address of where the unit is to be returned .

4 .  Pack unit 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 First 

Class Mail to avoid loss in transit to:  Cobra Factory Service, Cobra Electronics Corporation, 6500 

W . Cortland St ., Chicago, IL 60707 .

6 .   If the unit is in warranty, upon receipt of your unit it will either be repaired or exchanged 

depending on the model . Please allow approximately 3 to 4 weeks before contacting us for  

status . If the unit 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 1 .773 .889 .3087  

for assistance .

If You Think You Need Service

 

 

   18 WX ST II 

 Mobile Radio 

with 

 

   System

Operating Instructions for your 

18 WX ST II

Nothing Comes Close to a Cobra

®

 


background image

CB Tranceiver

“Ingenious Products for Easier Communication.”

18 WX ST II

Mobile Radio 

with 

System

Operating Instructions for your 

18 WX ST II

18 WX ST II

OFF

OFF

A1

 

The Citizens Band Story

4

5

2

1

3

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 .)

FCC Regulations

FCC regulations permit only “transmissions” (one-party 

to another) rather than” broadcast” (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 hold-

er of an FCC-issued general Radio-Telephone Operator’s 

License .
Replacement or substitution of transistors, regular 

di odes or other parts of a unique nature, with parts 

other than those recommended by Cobra, may cause 

violation of the tech ni cal 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 oper-

ating your Cobra radio, even though the FCC no longer 

requires you to obtain an operator’s license .

What’s included with your CB Radio:

 1 .

   CB transceiver 

 6 .

   FCC rules

 2 .

   Microphone 

 .

     (not pictured)

 3 . 

Transceiver bracket 

 1 .

   

 4 .

   Microphone bracket

 5 .

  Operating Manual

 


background image

18 WX ST II

OFF

OFF

EXT. SPKR.

POWER

13.8V DC

ANTENNA

A2

 

Controls and Indicators

Thank you for purchasing the Cobra 18 WX ST II 

CB Radio Transceiver . Properly used, this Cobra 

product will give you many years of reliable service .

“Cuts Static coming in, adds Punch going out!”

Technology that dramatically improves the 

transmission and reception of CB radio signals .
The revolutionary SoundTracker

TM

 System recon-

figures the transmission signal which allows it to 

be transferred more effectively through cluttered 

airwaves .
At the same time, it significantly reduces the 

amount of static on all incoming CB signals .
The end result is a clearer, cleaner sounding 

reception of signals and a more powerful  

transmission which dramatically improve 

CB communications .

Customer Support

Should you encounter any problems with this 

product, or not understand its many features, 

please refer to this owner’s manual . If, after refer-

ring to the manual, you still need help, call Cobra 

Customer Service at 773 .889 .3087 . 

C

obra Customer Service

Live operators are  

available M­F 8:00 am – 

5:30 pm Central Time at 

773.889.3087

Automated Technical 

Assistance available 24 

hours a day, seven days a 

week. E­mail questions to: 

productinfo@cobra.com

Cobra on the World Wide 

Web: Frequently Asked 

Questions (FAQ) can be 

found at: www.cobra.com

A3

1

7

12

6

2

3 4 5

 

Our Thanks to You

13

14

8

11

15

1. 

Microphone Connector.  

2. 

Off/On/Volume. 

3. 

Squelch. 

4. 

Channel 9/Channel 19

5. 

CB/Weather

6. 

Channel Selector Button. 

7. 

LED Channel Display. 

8. 

S/RF Power Meter. 

9. 

WX Indicator LED.

10. 

TX Indicator LED. 

11. 

RX Indicator LED.

12. 

Scan Button. 

13. 

SoundTracker™ Button.

14. 

Dual Watch Button. 

15. 

Microphone

Back Side

16. 

Antenna Connector

17.

  External Speaker Connector

18.

  Power Cord

9

10

16

17

18