Cobra 75wxst Tranciever Remote Mount Manual

							Operating instructions for your
COBRA ELECTRONICS CORPORATION
6500 W. Cortland Street
Chicago, Illinois 60707
Printed in Thailand              Cobra Electronics Corp.© 1997            Part no. 480-230-P-001
COMPACT REMOTE MOUNT
CB RADIO WITH
75 WX ST“Ingenious Products for 
Easier Communication.”
“Cuts Noise Coming In... Strengthens Signals Going Out” 
						

							INTRODUCTION
3
CITIZENS BAND RADIO 
WITHSOUNDTRACKERCONTENTS:Introduction
..........................................3
Features............................................3
Technical Support and service..........3
Controls and Indicators..................4/5
Included with your 75WX....................6
Installation............................................7
Connector Box Location....................7
Mounting Connector Box..............8/9
Microphone Hanger........................10
Antenna..........................................11
Speakers..........................................12
Noise Interference..........................12
SoundTracker System......................13
Operation............................................13
Turning your CB On........................14
Selecting a Channel........................15
Activating SoundTracker..................16
Testing SoundTracker........................17
Setting the Squelch......................18/19
LCD Readout..................................20Operation (continued)
Receive / Transmit............................21
One Touch Channel 9 & 19........22/23
Key Lock..........................................24
Frequency Display..........................25
All Channel Scan............................26
Weather Channel............................27
Channel Saver..................................28
Memory Channels......................28/29
Dual Watch................................30/31
If you think you need service..............32
How your CB can serve you................33
A few rules you should know..........33
Weather Channel Messages..............34
Channel 9 Emergency Messages......35
CB 10 Codes....................................36
Frequency Ranges................................37
Specifications......................................38
Warranty Information..........................39
Optional Accessories..........................40
75WX ST
INTRODUCTIONThe Cobra 75 WX ST is the ultimate in remote mount CB transceivers and
features the SoundTracker system which dramatically eliminates annoying
static to deliver crisp, clear sound quality. The 75’s compact, state-of-the-
art design provides consistent, outstanding performance in almost all
conditions or situations. For ultimate satisfaction and performance from
your Cobra 75 WX ST, please review these operating instructions fully,
prior to use.FEATURES• SoundTracker System
• 40 CB Radio Channels
• 10 Weather Channels 
• One-touch Emergency Channel 9 
• One-touch Information Channel 19
• Remote Mount Installation System
• Full Featured LCD Display Panel
• Squelch Control
• Key Lock
• Channel Saver Circuitry
• Dual Watch Channel Monitor
• Full Channel Scan 
• Four Memory Locations
• 10-Foot Flexible Cord
• Quick DisconnectTECHNICAL SUPPORT How to use your
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 - 8:00 pm, Monday through Friday, CST.
Technical assistance is also available on-line in the Frequently Asked
Question (FAQ) section at www.cobraelec.com or by e-mail 
to [email protected] 
						

							1. SoundTracker Key
2. Memory Key
3. Channel 9 / 19 / Memory Location 1 Key
4. LCD Display Panel
5. Dual Watch / Memory Location 2 Key
6. Scan / Memory Location 3 Key
7. CB / Weather Channel / 
Memory Location 4 Key
8. On / Off / Volume Control
9. Lock Key
10. Squelch Control
11. Microphone
12. Speaker
13. Channel Up
14. Channel Down
15. PTT (Push-To-Talk)Key
16. Quick Disconnect Connector
INTRODUCTIONCONTROLSANDINDICATORS
5
INTRODUCTIONCONTROLSANDINDICATORS4
12345
6
78910
13
12
14
15
11
16 
						

							INSTALLATION
CONNECTORBOX LOCATION
7
INTRODUCTIONCOMPONENTSINCLUDED6
LOCATIONMount your Cobra 75 WX ST Connector Box in a
convenient location, away from moisture and direct
sunlight, in a location that will not interfere with driving. 
Cobra suggests mounting it either under the front seat or
on the fire wall.UNDER THEFRONT
SEATINSTALLATION
FIRE WALL 
INSTALLATIONNOTE: Do not mount under
the hood, near heat ducts or
in direct line of the car’s
heater.
75 WX ST Transceiver
Connector Box
Installation Hardware
Operating ManualOperating instructions for your
COMPACT REMOTE MOUNT
CBRADIO WITH
75WXST“Ingenious Products for 
Easier Communication.”
“Cuts Noise Coming In... Strengthens Signals Going Out” 
						

							INSTALLATION
CONNECTORBOX
9
INSTALLATIONCONNECTORBOX8MOUNTING
CONNECTORBOX1.Hold Cobra 75 WX ST
Connector Box in exact
location desired for
mounting. 
2.
Using it as a template,
mark the location 
for 
the mounting screws
(included). 
NOTE: Make certain that
nothing will interfere with
the installation of the
mounting screws, before
drilling holes. 
3. Mount Connector Box 
as shown.
CONNECTING WIRES1.Connect the antenna
cable connector.
2.Connect the red wire
marked “BATT” (+)
directly to the positive
side of the battery or to a
connection on the fuse
box that is always on. 
3.Connect the black wire
marked “Ground” (-) to
the negative side of the
car, usually the chassis.
Any other location with
good electrical contact
(paint removed) will 
also work. 
CAUTION:Leaving the 75 WX ST on after your car is turned off can
drain your car battery when connected to a constant 12
volt source. When connected to accessory 12 volt source
unit will turn off. 
						

							11
INSTALLING
MICROPHONE
HANGER1.Hold microphone hanger
in location desired for
mounting. Make certain
that nothing will interfere
with the hanger’s
installation.
2.Mark the location for the
three mounting screws
(screws included).
3.Drill and mount
microphone hanger.INSTALLATIONMICROPHONEHANGER10
INSTALLATION
CBANTENNA
CB ANTENNA INSTALLATIONFor the most reliable operation and
maximum range, Cobra recommends
using a vertically polarized, quarter wave
length whip antenna (illustration A). 
Shorter, loaded-type whips are adequate
when maximum range is not required
(illustration B).
NOTE: Mobile installations (cars, trucks,
boats, etc) should be made only with a
non-directional antenna system. 
• A standard antenna connector 
(Type SO-239) is provided on the
Connector Box for easy connection to 
a standard PL-259 cable termination. 
• Cobra antenna models are
recommended; see your local CB dealer 
or order directly from Cobra. See order
form on page 40.
• For maximum efficiency in boat
installations, a ground plate is required,
unless the vessel has a steel hull. Consult
your CB dealer for information regarding
an adequate grounding system.
A
B 
						

							13
12INSTALLATIONSPEAKERS/NOISEINTERFERENCE1.Mount external speaker in desired location.
2.Plug jack into the back of the Connector Box labled EXT.
*The external speaker should have 4-8 ohms impedance and be able to
handle at least 4 watts. IGNITIONNOISEINTERFERENCEThe alternator and ignition system in your vehicle may limit your ability 
to receive low signal levels. Other noise interference can be the result 
of several different installation variables. Consult your Cobra dealer or 
a 2-way radio technician to help locate and correct the source of severe
noise interference.EXTERNAL SPEAKER INSTALLATION
OPERATION
HOW SOUNDTRACKER WORKS
SOUNDTRACKER SYSTEMWhile previous systems only “blanked out” or limited noise in higher
sound frequencies, the revolutionary new SoundTracker System actually
reduces noise while leaving the signal intact in the reception mode. In 
the transmission mode, it actually strengthens the signal, providing you
with a significant reduction in noise on reception and transmission.Sound clarity is measured by the ratio of the signal
level to the noise level. The higher the signal-to-noise
ratio, the better the sound.HOW SOUNDTRACKER WORKSOn Reception
– 
“Cuts Noise Coming In”
With a normal CB, distant signals fall below the squelch level and
are 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. 
						

							14OPERATIONTURNING CB ON
15
1.Rotate the power ON-
OFF Volume Control
clockwise.
2.Turn the Squelch Control
counterclockwise until
noise is heard.
3.Adjust volume to a
comfortable level. 
OUND
T
RACKER
TM
TURNING YOUR
CB ON
OPERATION
SELECTINGACHANNEL
SELECTING A
CHANNEL1.Change channels by
pressing either the
channel 
s up or channel
t down key .
2.To quick-advance
channels, press and 
hold either key. 
						

							40
1359+30  SIG
0.51234  PWR
AMRX
TESTING
SOUNDTRACKER1.Select any unused
channel on your CB.
2.Open the squelch control
fully by turning the knob
counterclock-wise until 
it stops.
3.Turn the volume up 
louder than your normal
listening level.
4.Depress the
SoundTracker key. Notice
the significant reduction
in noise.
SOUND
TRACKER
TM
17
OPERATION
TESTING SOUNDTRACKER
16OPERATIONACTIVATINGSOUNDTRACKER2.will be displayed on
the LCD readout.
ST
ACTIVATING
SOUNDTRACKER1.Depress the Sound-
Tracker key.
40
1359+30  SIG
0.51234  PWR 
						

							SOUND
TRACKER
TM
5.If you turn the squelch
control fully counter-
clockwise, it lowers the
“squelch gate” so low
that everything gets
through
- noise,
weak
signals
and
strong
signals. 
6.To set the “squelch gate”
to the DSS-Desired
Squelch Setting, turn the
squelch control
counterclockwise until
you hear noise. Then turn
the squelch control back
clockwise
just until
the noise
stops.
Now only
strong
signals
get through. 
The Desired Squelch
Setting,(DSS)only allows
actual transmissions to
come through. This
effectively blocks out
unwanted noise. 
19
OPERATION
SETTINGTHESQUELCH
18OPERATIONSETTINGTHESQUELCH
SOUND
TRACKER
TM
SETTING THE
SQUELCH1.Turn CB on by turning 
the volume control
clockwise. Adjust 
the volume to a
comfortable level.
2.Before setting the squelch
control on your radio,
you must select a channel
that is not in use.
3.Turn on SoundTracker.
To achieve the Desired
Squelch Setting (DSS):
4.Think of your Squelch
Control as a gate for
incoming signals. If you
turn the Squelch Control
fully clockwise, it raises
the “squelch
gate” so
high that 
no signals 
get through.
SOUND
TRACKER
TM