Cobra Electronics Corporation
6500 West Cortland Street
Chicago, IL60707
IfYou Think You Need Service
For te c h n i cal assistance,please call our A u to m ated Help Desk which can assist
you by answe ring the most fr e q u e ntly asked questions about C o b ra prod u ct s.
A Consumer Service Representative can be reached through this same number 8:00 am - 8:00 pm, Monday
Technical assistance is also a vailable on-line in the F requently Asked Questions (F AQ) section at
If you think you need service call 1.773.889.3087
“If your product should require factory service please call Cobra first before sending your unit in.
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 follo wing 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 or 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.
www.cobraelec.com or by e-mail to pr oductinfo@cobraelec.com
(773) 889-3087
24 hours a da y, 7 days a week.
through Friday,CST.
O pe rating Instru ctions
for your Co b ra HH 37 ST
Citizens Band
2-Way Handheld
CB Radio
“Ingenious Prod u cts for Easier Co m m u n i cat i o n .”
HH
37 ST
The CB Story
The Citizens Band lies between the shortwave
broadcast and 10-meter Amateur radio bands and
1
2
3
4
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.”
FCCWarnings
Replacement or substitution of transistors,regular
diodes or other parts of a unique nature,with
parts other than those recommended by Cobra,
m ay cause a violation of the te c h n i cal re g u l at i o n s
of Part 95 of the FCC Rules, or violation of Ty pe
Acceptance requirements of Part 2 of the Rules.
Citizens Band (CB) Radio operators are not
required to obtain an FCC license to operate their
CB equipment or provide station identification.
Nevertheless,an operator of a CB radio station
is still required to comply with the communications act and with the rules of CB Radio Operation.
What’s Included with Your HH 37 ST
1. High Efficiency Antenna
2. Removable Belt Clip
3. Wrist Strap
4. 12 Volt Cigarette Lighter Plug
A1
Page 2
37st manual layout.5 10/1/98 9:56 AM Page 4
Controls and Indicators
1. BNCAntennaConnector
2. Squelch Control
3. On/Off Volume Control
4. Removable Belt Clip
5. External Speaker Jack
6. External Microphone Jack
7. 12 Volt DC Power Jack
8. NiCad Battery Charge Jack
9. Channel Up/Down Key
1 0 . PTT (Push ToTalk ) Key
11 . Battery Chamber
12 . LED Channel Display
13 . SoundTracker™ Key
14 . Power Save Key
1 5 . Microphone
16 . SoundTracker™ LED
17 . TX (transmit)/
Batt (battery low) LED
1 8 . Battery Charge/
Power Save LED
1
5
7
6
8
23
4
1 1
1 0
Our Thanks to You
Thank you for purchasing the Cobra HH 37 ST
handheld CB. Properly used, this Cobra product
will give you many years of reliable service.
This Patent pending technology dramatically
improves transmission and reception of CB
signals.
TM
The revolutionary SoundTrackerTMSystem reconfigures the transmission signal which allows it to
be transferred more efficiently through cluttered
airwaves.
1 5
At the same time,it significantly reduces the
amount of static on all incoming CB signals.
The end result is a cleaner,clearer sounding
9
reception of signals and a more powerful
transmission which dramatically improves CB
communications.
Customer Support
Should you encounter any problems with the
product or not understand its many features,
please refer to this owner’s manual. If,after
referring to the manual, you still need help,
call Cobra Customer Service at 773.889.3087.
Cobra Customer Service
Live operators are available
M-F 8:00 am - 8:00 pm CST at:
773.889.3087
Automated Technical Assistance
available 24 hours a day,seven
days a week.E-mail questions to:
productinfo@cobraelec.com
Cobra on the World Wide Web:
Frequently Asked Questions (FAQ)
can be found on-line at:
www.cobraelec.com
Order Form.....................................................................24
IfYou Think You Need Service...............Back Cover
™
Cobra
Features of This Product
• SoundTracker™System
• 40 CB Channels
• Full 4 Watt RF Power
• Power Saver (HI/LOW)
• LED Channel Di s p l ay
• High Efficiency Flexible Antenna
• External Speaker/
• NiCad Battery Charge Jack
• TX Transmit Indicator
• Omni Directional Microphone
HH
Microphone Jack
37 ST
1
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37st manual layout.5 10/1/98 9:56 AM Page 8
OperationOperation
Attach Antenna
Attach Antenna
1
Insert.
2
Turn clockwise.
Attach Belt Clip
12
Slide belt clip up on
rails of base until
tab locks.
To remove belt clip,
lift tab out and slide
belt clip down.
Install Batteries
1
Remove battery chamber cover.
2
Install batteries by polarity markings.
3
Replacecover.
Attach Belt Clip
Note
Clip slides up to attach and slides
down to remove.
Battery
Installation
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 the TX/Batt LED will
remain on. Replace alkaline
batteries or recharge NiCad
batteries.
32
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37st manual layout.5 10/1/98 9:56 AM Page 10
OperationOperation
Turning On
Setting Squelch
Gate closed
Turning On
Rotate ON - OFF Volume Control clockwise.
Setting Squelch
Squelch is the “control gate”for incoming signals.
1
Turn volume up
louder than normal.
2
Fully clockwise
closes the “gate”,
allowing no
incoming signals.
3
Fully counterclockwiseopens the
“gate”and all signals enter.
4
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 and only strong signals will enter.
Gate open
Gate set to Desired
Squelch Setting (DSS)
4
5
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37st manual layout.5 10/1/98 9:56 AM Page 12
OperationOperation
Select Channel
Note
For quick advance,push and hold
arrow key(s).
Note
When switching from one channel to another,squelch will need
to be reset.See Setting Squelch
on page 4.
Select Channel
1
Turn power ON.
2
For higher channel,
pushUP arrow key.
3
For lower Channel,
pushDOWN
arrow key.
LED Display
All needed information is displayed.
LED Display
NoteTX/Batt Indicator
This LED will illuminate red when
the PTT button is pushed andheld (this means your unit istransmitting) or batteries arelow and need recharging or
replacement.
Charge/Pwr Save Button
The Charge/Pwr Save LED will
illuminate red when Power Save
button is pushed or when charging NiCad batteries with charger
plugged in.
6
7
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37st manual layout.5 10/1/98 9:56 AM Page 14
OperationOperation
Transmit/Receive
Note
While PTT button is pressed you
cannot receive transmissions.
Transmit/Receive
1
To transmit,push and hold PTT button.
2
TX/Batt (transmit) will illuminate red.
3
Hold mic about
2 inches from
mouth. Speak
in a normal
voice.
4
ReleasePTT button to receive incoming
transmissions.
Note
Your HH 37 ST is always ready to
receive incoming signals when
the PTT button is released.
8
9
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37st manual layout.5 10/1/98 9:56 AM Page 16
OperationOperation
Note
SoundTracker™ gives you
clearer,cleaner reception to
improve CB communications
while on the air.
The SoundTrackerTMSystem
While previous systems only “blanket out”or limit
noise in higher sound frequencies, the revolutionary new SoundTrackerTMSystem 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 SoundTrackerTMWorks
On Reception - “Cuts noise coming in”
With a normal CB, distant signals fall below
the squelch level and are unintelligible.With a
SoundTrackerTMCB,the noise level is cut 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.
OnTransmission - “Strengthens signals going out”
A SoundTrackerTMCB 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.
Activating SoundTracker
1
Pushand release the ST key.
2
The SoundTracker™ LED will illuminate red.
TM
Activating
SoundTracker
Note
This engages the SoundTracker™
system and reduces the noise level.
™
1110
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37st manual layout.5 10/1/98 9:56 AM Page 18
Operation
Testing
SoundTracker
Testing SoundTracker
™
1
Select any unused channel on your CB.
2
Fully counterclockwiseopens the “gate”and
all signals enter. Turn the knob until
it stops.
Operation
TM
Note
At times you may experience
different levels of noise
reduction.Different terrains
and environments will effect
the SoundTracker™ System’s
performance.
3
Turnthe volume up louder than your normal
listening level.
4
Pushand release the ST button.
The SOUNDTracker™ LED will illuminate red.
Notice the significant reduction in noise.
*
5
To disengage SoundTracker™ push and release
ST button again.
12
13
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37st manual layout.5 10/1/98 9:56 AM Page 20
OperationOperation
In Vehicle UseExternal Speaker/
Note
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.
Power SaverHI/LOW
In Vehicle Use
The HH 37 ST can be
connected to your
cigarette lighter with
the provided car cord.
This power connection does NOT charge
the batteries.
Power Saver-HI/LOW
Reduces the power to 1 watt. This does not
decrease the unit’s ability to receive but does
reduce the transmitting range.
1
Push and
Note
Battery life is increased approximately 50% while in Battery
Save LOW Mode.This reduces
power output to 1 watt.
2
Power Save LED will
release
PWR Save
button.
illuminate.
External Speaker/Microphone Jack
Your HH 37 ST can be fitted with an external
speaker/microphone,(not included) freeing your
hands for other tasks (like driving!).
1
Locate SPK/MIC jack on side of unit and
insert plug.
2
Hold mic about
2 inches from
mouth. Speak
Microphone Jack
Note
External speaker/microphone is
not included with this unit. See
accessories on page 23 for available options.
in a normal
voice.
14
15
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37st manual layout.5 10/1/98 9:56 AM Page 22
How Your CB Can Serve YouHow Your CB Can Serve You
A Few Rules
You Should
Know
Channel 9
Emergency
Messages
Note
If no response on channel 9,
try channels 19 or 14.
• Warn of traffic problems
• Provide weather and road data
• Provide help in event of an emergency
• Provide direct contact with home or office
• Assist police by reporting erratic drivers
• Get “local information”to find destination
• Communicate with family and friends
• Suggest spots to eat and sleep
• Keep you alert while traveling
A Few Rules You Should Know
A. Co nve r s ations cannot last more than 5 minute s
with another station. A one minute break is
required to let others use the channel.
B. You cannot blast others off the air by use of
illegally amplified transmitters or illegally
high antennas.
C. You cannot use CB to promote illegal activities.
D. Profanity is not allowed.
E. You may not transmit music with a CB.
F. Selling of merchandise and/or services is
prohibited.
1. Set to channel 9 for emergencies
Be sure antenna is properly connected.
2. CB Distress Data
When transmitting an emergency,you should
request a “REACT BASE”and provide the CB
distress data (called CLIP):
C all SignIdentify yourself.
L ocation Be exact.
I njuriesNumber.Type.Trapped?
P roblemGive details and help needed.
Transmit C L I Pre pe atedly so any monitor can assist.
The FCC gives these examples of permitted and
prohibited messages for channel 9. These are
only guidelines and not all-inclusive:
Permitted Example Message
Yes“Tornado sighted six miles north
of town.”
No“Post number 10.
No tornado sighted.”
Yes“Out of gas on I-95 at mile
marker 211.”
No“Out of gas in my driveway.”
Yes“Four car accident on I-94 at
Exit 11. Send police and
ambulance.”
No“Traffic moving smoothly on I-94.”
Yes“Weather Bureau has issued
thunderstorm warning.
Bring sailboat into port.”
No“Attention motorists.
Weather Bureau advises snow
tomorrow will accumulate
4 to 6 inches.”
Yes“Fire in building at 539 Main,
Evanston.”
No“Halloween patrol number 3.
All quiet.”
1716
Page 12
37st manual layout.5 10/1/98 9:56 AM Page 24
How Your CB Can Serve YouHow Your CB Can Serve You
CB 10-Codes
CB 10-Codes
Citizen Bands have adopted the “10-CODES”for
standard questions and answers. These codes
p rovide quick and easy co m m u n i cat i o n ,e s pe c i a l l y
in noisy areas. Following are some of the more
common codes and meanings:
Code Meaning
10-1 Receiving poorly
10-2 Receiving well
10-3 Stop transmitting
10-4 OK,message received
10-5 Relay message
10-6 Busy,stand by
10-7 Out of service,leaving
10-8 In service,subject to call
10-9 Repeat message
10-10 Transmission completed standing by
10-11 Talking too rapidly
10-12 Visitors present
10-13 Advise weather/roads
10-16 Make pick up at
10-17 Urgent business
10-18 Anything for us?
10-19 Return to base
10-20 My location is
10-21 Call by phone
10-22 Report in person to
10-23 Stand by
10-24 Completed last assignment
10-25 Can you contact
10-26 Disregard last info
10-27 Moving to channel
10-28 Identify your station
Code Meaning
10-29 Time is up for contact
10-30 Does not conform to FCC rules
10-33 Emergency traffic
10-34 Trouble at this station
10-35 Confidential information
10-36 Correct time is
10-37 Wrecker needed at
10-38 Ambulance needed
10-39 Message delivered
10-41 Turn to channel
10-42 Traffic accident at
10-43 Traffic tie up at
10-44 Have a message for
10-45 All units within range please report
10-50 Break channel
10-60 What is next message number?
10-62 Unable to copy.Use phone
10-63 Net directed to
10-64 Net clear
10-65 Awaiting your next message/assignment
10-67 All units comply
10-70 Fire at
10-71 Proceed, transmission in sequence
10-77 Negative contact
10-81 Reserve hotel room for
10-82 Reserve room for
10-85 My address is
10-91 Talk closer to mic
10-93 Check my frequency on this channel
10-94 Give me a long count
10-99 Mission completed, all units secure
10-200 Police needed at
1918
Page 13
37st manual layout.5 10/1/98 9:56 AM Page 26
HH
37 ST SpecificationsFrequency Ranges
The COBRA HH37 ST transceiver represents one of
the most advanced AM two-way radios used as a
Class D station in the Citizens Radio Service.This
unit features advanced Phase Lock Loop (PLL)
circuitry providing complete coverage of all 40 CB
channels.
Channel Channel
CBFreq.CB Freq.
Channel In MHzChannel In MHz
AUDIO OUTPUT. . . . . . . . . . . . . . 500 mW MAXIMUM AT 10 % DISTO RT I O N
FREQUENCY RESPONSE. . . . . . . 300 - 3000 HZ AT -6 DB
2ND IF IMAGE REJECTION. . . . . GREATER THAN 60 DB
ADJACENT CH.REJECTION. . . . 50 DB MIN.
AUTOMATIC NOISE LIMITER. . . BUILT- IN
FREQUENCY CONTROL . . . . . . . PLL (PHASE LOCK LOOP)
MAX.SIGNAL TO NOISE RATIO. 58 DB WITH ST ON
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 DB WITH ST OFF
13.8 VDC,EXTERNAL
4.0 W AT 13.8 VDC - HIGH,1.0 IN LOW
1 ST - 10.690 MHZ,2ND - 455 KHZ
2120
Page 14
37st manual layout.5 10/1/98 9:56 AM Page 28
Optional AccessoriesLimited Two Year Warranty
Cobra Electronics
Corporation
6500 West Cortland Street
Chicago,Illinois 60707
COBRA ELECTRONICS CORPORATIONwarrants that its
COBRA CB Radios,and the component parts thereof, will
be free of defects in workmanship and materials for period
of two (2) years from the date of first 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,
defective CB radios,products or component parts upon
delivery to the COBRA factory Service Department,accompanied by proof of the date of first consumer purchase,
such as a duplicated copy of a sales receipt.
You must pay any initial shipping charges required to ship
the product 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
product 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
merchantability 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 resulting from loss of use or cost of installat i o n .
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 limitations may not apply to you.
Ear Bud Mic with PTT
I n te g ra ted spe a ker/mic adapter that
fits in your ear.Includes shirt clip.
M A- E B M$ 2 9 . 9 5
Vox Mic
VOX (Vo i ce Ope ra ted Tra n s m i t te r )
a d a p ter allows you hands-free ope ra t i o n .
M A- VOX$ 4 9 . 9 5
(1) High Pe rfo r m a n c eNi-Cad
Rechargeable Battery Cell
2 1 2 - 0 0 1 - N - 0 0 1$3.95 ea.
Replacement Belt Clip
H A- B C$ 4 . 9 5
120 Volt A/C Wall Ch a rger
with Pl u g
Ch a rges 9 N i - Cad batte ry cells in 24
hours right in the unit.
CA- 2 5$ 1 0 . 0 0
Doubles the range
of your HH 37 ST.
CA- 4 1$ 2 5 . 9 5
Magnetic Mount
Weather Antenna
Allows greater
transmission range
while in a moving
vehicle.
ATW- 4 0 0$ 2 9 . 9 5
BNC/SO239 Antenna Adapter
Al l ows co n n e ction of the 45 WX ST
to standard ante n n a s.
CA- 4 3$ 5 . 9 5
You Can Find These Fine
Accessories AtYour Local
Cobra CB Dealer
If you wish, you can order
directly from Cobra.
Order by phone
Call 1.773.889.3087
(Press 1 from the main menu)
8 a.m.-8 p.m. M-F CST.
Order by mail or fax
Please fill out order form
on next page,and mail/fax
directly to Cobra.
2322
Page 15
37st manual layout.5 10/1/98 9:56 AM Page 30
Accessory Order Form
Item #DescriptionCost Ea. Qty. Amount
M A - E B M Ear Bud Mi c$ 2 9 . 9 5
M A - VOX Vox Mi c$ 4 9 . 9 5
2 1 2 - 0 0 1 - N - 0 0 1 (1) Ni-Cad Re c h a rgeable Bat te ry Cell $3.95
HA-BC Replacement Belt Clip$4.95
CA-25 120 V A/C Wall Ch a rger with Pl u g$ 1 0 . 0 0
CA-40 Lapel Microphone $25.95
CA-41 Long Range Antenna $25.95
ATW-400 Magnetic MountWeather Antenna $29.95
CA-43 BNC/S0239 Antenna Adapter $5.95
For credit card orders fill out order
form and fax to:1.773.622.2269
or call 1.773.889.3087
(Press 1 from the main menu)
8:00 am - 8:00 pm,M-F,CST.
Please print clearly
Name
Address (No P.O.Box)
CityState
Zip
Telephone ( )
Credit Card No.Exp.Date
Customer Signature
Circle One: Visa MasterCard Discover
Allow 4 to 6 weeks for delivery.Offer valid in Continental U.S.only.
Subtotal
(Tax if applicable)
Shipping/handling
Total
Ma ke check or money order (no stamps)
payable to:
Cobra Accessories Dept.
6500 West Co rtland St.Ch i ca g o,IL 60707
$4.00
24
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