Cobra Hh37stml Handheld Tranciever Manual

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 co m m u n i cations serv i ce was opened in 1959.
FCC Regulations
FCC regulations permit only “transmissions”
(one party to another) rather than “broadcasts”
(to a wide audience).Advertising is not allowed
on CB Channels because it is considered 
“broadcasting.”
FCC Warnings 
Replacement or substitution of transistors, regular
diodes or other parts of a unique...

Thank you for purchasing the Cobra HH 37 ST
handheld CB. Properly used,this Cobra product
will give you many years of reliable service.
SoundTrackerTM
“Cuts noise coming in...strengthens signals 
going out.”
This Patent pending technology dramatically
improves transmission and reception of CB 
signals.
The revolutionary SoundTrackerTM
System recon-
figures the transmission signal which allows it to
be transferred more efficiently through cluttered
airwaves.
At the same time,it significantly reduces the...

How to Use Your 
Cobra 
HH37 STContents
Features...........................................................................1
The CB Story..................................................................A1
FCC Regulations
FCC Warnings
Included Accessories
Controls & Indicators.................................................A2
Our Thanks to You.......................................................A3
SoundTracker™
Customer Support
Operating Your HH 37 ST...

To remove belt clip,
lifttab out and slide
belt clip down.Operation Operation
Attach Antenna32Attach Antenna
Insert.1
Turn clockwise.2
Removebattery chamber cover.
Install batteries by polarity markings.
Replacecover.
Battery
Installation Attach Belt ClipInstall Batteries12312Attach Belt Clip
Note
Ignoring polarity markings can
cause damage to both the unit
and the batteries.
The HH 37 ST requires  9 “AA”
alkaline or NiCad batteries 
(not included with the unit).
When batteries are low or need
charging...

Operation OperationFully       counterclockwiseopens the 
“gate”and all signals enter. Turning On
Rotate ON - OFF Volume Control clockwise.5
Turning On4Setting Squelch
Squelch is the “control gate” for incoming signals.
To achieve the Desired Squelch Setting (DSS),
turn the Squelch control       counterclockwise
until you hear noise. Now turn the control
clockwisejust until the noise stops. This is the
DSS setting and only strong signals will enter.34 Turn volume up
louder than normal.1
Fully...

Operation OperationLED Display
All needed information is displayed. Select Channel 
Turn power ON.
LED Display7 Note
For quick advance,push and hold
arrow key(s).
Note
When switching from one chan-
nel to another,squelch will need
to be reset. See Setting Squelch 
on page 4.Note
TX/Batt Indicator
This LED will illuminate red when
the PTT button is pushed and
held (this means your unit is
transmitting) or batteries are
low and need recharging or
replacement.
Charge/Pwr Save Button
The Charge/Pwr Save LED...

Operation OperationTransmit/Receive
ReleasePTT button to receive incoming 
transmissions.9
Transmit/Receive8Hold mic about
2 inches from
mouth.Speak
in a normal
voice. To transmit,push and hold      PTT button.134
TX/Batt (transmit) will illuminate red.2 Note
While PTT button is pressed you
cannot receive transmissions.
Note
Your HH 37 ST is always ready to
receive incoming signals when
the PTT button is released.37st manual layout.5  10/1/98 9:56 AM  Page 14 

The SoundTrackerTM
System
While previous systems only “blanket out”or limit
noise in higher sound frequencies,the revolution-
ary new SoundTrackerTM
System actually reduces
noise while leaving the signal intact in the recep-
tion 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...

Turnthe volume up louder than your normal
listening level. Selectany unused channel on your CB.Operation13Operation
Testing
SoundTracker™12Testing SoundTrackerTM13
Fully       counterclockwiseopens the “gate”and
all signals enter. Turn the knob until 
it stops.2Note
At times you may experience
different levels of noise 
reduction.Different terrains 
and environments will effect
the SoundTracker™ System’s
performance.Pushand releasethe         ST button.
The SOUNDTracker™ LED will illuminate red.
*Notice...

Power Save LED will
illuminate.In Vehicle Use15In Vehicle UseExternal Speaker/
Microphone Jack14Note
Due to the characteristics of 
CB transmissions,it is neccesary
to use an external car roof
antenna and a BNC adapter 
to receive optimal performance
while in your vehicle. See
Accessories section on page 23.
Note
DC/Power Cord is provided.
Note
External speaker/microphone is
not included with this unit. See
accessories on page 23 for avail-
able options.
OperationOperationPower Saver-HI/LOW
Reduces the...