Cobra Electronics Portable Radio 75 WX ST User Manual

Operating instructions for your  
75 WX ST  
COMPACT REMOTE MOUNT  
CB RADIO WITH  
“Cuts Noise Coming In... Strengthens Signals Going Out”  
COBRA ELECTRONICS CORPORATION  
6500 W. Cortland Street  
Chicago, Illinois 60707  
“Ingenious Products for  
Easier Communication.”  
Printed in Thailand  
Cobra Electronics Corp.© 1997  
Part no. 480-230-P-001  
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INTRODUCTION  
INTRODUCTION  
CONTROLS AND INDICATORS  
CONTROLS AND INDICATORS  
4
5
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  
5
4
6
7
3
13  
14  
2
8
15  
9
16  
1
12  
10  
11  
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INTRODUCTION  
INSTALLATION  
COMPONENTS INCLUDED  
CONNECTOR BOX LOCATION  
6
7
LOCATION  
Mount 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 THE FRONT  
SEAT INSTALLATION  
75 WX ST Transceiver  
Connector Box  
FIRE WALL  
INSTALLATION  
NOTE: Do not mount under  
the hood, near heat ducts or  
in direct line of the cars  
heater.  
Installation Hardware  
Operating Manual  
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INSTALLATION  
INSTALLATION  
CONNECTOR BOX  
CONNECTOR BOX  
8
9
MOUNTING  
CONNECTING WIRES  
CONNECTOR BOX  
1. Connect the antenna  
1. Hold Cobra 75 WX ST  
Connector Box in exact  
location desired for  
mounting.  
cable connector.  
2. Using it as a template,  
mark the location for  
the mounting screws  
(included).  
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.  
NOTE: Make certain that  
nothing will interfere with  
the installation of the  
mounting screws, before  
drilling holes.  
3. Mount Connector Box  
as shown.  
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.  
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INSTALLATION  
INSTALLATION  
MICROPHONE HANGER  
CB ANTENNA  
10  
11  
INSTALLING  
MICROPHONE  
HANGER  
1. Hold microphone hanger  
in location desired for  
mounting. Make certain  
that nothing will interfere  
with the hangers  
CB ANTENNA INSTALLATION  
For the most reliable operation and  
maximum range, Cobra recommends  
using a vertically polarized, quarter wave  
length whip antenna (illustration A).  
A
Shorter, loaded-type whips are adequate  
when maximum range is not required  
(illustration B).  
installation.  
NOTE: Mobile installations (cars, trucks,  
boats, etc) should be made only with a  
non-directional antenna system.  
2. Mark the location for the  
three mounting screws  
(screws included).  
• A standard antenna connector  
(Type SO-239) is provided on the  
Connector Box for easy connection to  
a standard PL-259 cable termination.  
3. Drill and mount  
• Cobra antenna models are  
microphone hanger.  
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.  
B
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INSTALLATION  
OPERATION  
SPEAKERS/NOISE INTERFERENCE  
HOW SOUNDTRACKER WORKS  
12  
13  
EXTERNAL SPEAKER INSTALLATION  
SOUNDTRACKER SYSTEM  
While 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 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.  
1. 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.  
IGNITION NOISE INTERFERENCE  
The 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.  
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.  
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OPERATION  
OPERATION  
TURNING CB ON  
SELECTING A CHANNEL  
15  
14  
TURNING YOUR  
CB ON  
SELECTING A  
CHANNEL  
1. Change channels by  
pressing either the  
1. Rotate the power ON-  
OFF Volume Control  
clockwise.  
channel up or channel  
down key .  
2. Turn the Squelch Control  
counterclockwise until  
noise is heard.  
2. To quick-advance  
channels, press and  
hold either key.  
3. Adjust volume to a  
comfortable level.  
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OPERATION  
OPERATION  
ACTIVAT