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 car’s
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 hanger’s
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 |