37st manual layout.5 10/1/98 9:56 AM Page 1
HH
37 ST
The CB Story
Cobra Electronics Corporation
6500 West Cortland Street
Chicago, IL60707
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 communications service was opened in 1959.
1
Operating Instructions
for your Cobra HH 37 ST
If You Think You Need Service
FCC Regulations
Fortechnicalassistance,pleasecallourA utomated HelpDeskwhich canassist
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.”
Citizens Band
2-Way Handheld
CB Radio
you byansw eringthemost fr equentlyaskedquestionsabout C obraproducts.
(773) 889-3087
24 hours a da y, 7 days a week.
A Consumer Service Representative can be reached through this same number 8:00 am - 8:00 pm, Monday
through F riday, CST.
Technical assistance is also a vailable on-line in the F requently Asked Questions (F AQ) section a t
FCC Warnings
Replacement or substitution of transistors, regular
diodes or other parts of a unique nature, with
parts other than those recommended by Cobra,
may cause a violation of the technical regulations
of Part 95 of the FCC Rules, or violation of Type
Acceptance requirements of Part 2 of the Rules.
2
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 repa.”ir
You may be asked to send your unit to the Cobra factory. It will be necessary to furnish the follo w-
ing 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.
3
Citizens Band (CB) Radio operators are not
required to obtain an FCC license to operate their
CB equipment or provide station identification.
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.
Nevertheless, an operator of a CB radio station
is still required to comply with the communica-
tions act and with the rules of CB Radio Operation.
4. Pack unit securely to prevent damage in transit. If possible, use the original packing ma terial.
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.
What’s Included with Your HH 37 ST
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.
1. High Efficiency Antenna
2. Removable Belt Clip
3. Wrist Strap
4
4. 12 Volt Cigarette Lighter Plug
Cobra Electronics Corp.© 1998
Printed in Thailand
Part No. 480-270-P-001
“Ingenious Products for Easier Communication.”
A1
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37st manual layout.5 10/1/98 9:56 AM Page 7
How to Use Your
Cobra HH37 ST
Contents
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
Features ofThis Product
•
•
•
•
•
•
•
SoundTracker™ System
™
40 CB Channels
Full 4 Watt RF Power
Power Saver (HI/LOW)
LED Channel Display
High Efficiency Flexible Antenna
Antenna........................................................................2
Belt Clip........................................................................3
Battery Installation...................................................3
Turning on Your CB..................................................4
Setting Squelch.........................................................4
Selecting a Channel.................................................6
LED Display.................................................................7
Transmit/Receive ......................................................8
External Speaker/
Microphone Jack
™
•
•
•
NiCad Battery Charge Jack
TX Transmit Indicator
SoundTracker System...........................................10
In Vehicle Use.............................................................14
Power Saver (HI/LOW) ............................................14
External Speaker/Microphone.............................15
How Your CB Can Serve You....................................16
A Few Rules You Should Know............................16
Channel 9 Emergency Messages........................16
CB 10 Codes...............................................................18
Frequency Ranges ......................................................20
HH 37 ST Specifications............................................21
Warranty Information................................................22
Optional Accessories .................................................23
Order Form.....................................................................24
If You Think You Need Service...............Back Cover
Omni Directional Microphone
1
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37st manual layout.5 10/1/98 9:56 AM Page 8
Operation
Operation
Attach Antenna
Attach Belt Clip
Attach Antenna
Attach Belt Clip
1
Insert.
Note
Clip slides up to attach and slides
down to remove.
1
2
Slide belt clip up on
rails of base until
tab locks.
To remove belt clip,
lift tab out and slide
belt clip down.
2
Turn clockwise.
Install Batteries
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.
1
Remove battery chamber cover.
Install batteries by polarity markings.
Replace cover.
2
3
2
3
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37st manual layout.5 10/1/98 9:56 AM Page 10
Operation
Operation
Gate open
Turning On
Rotate ON - OFF Volume Control
Turning On
clockwise.
3
Fully
counterclockwise opens the
“gate”and all signals enter.
Setting Squelch
Squelch is the “control gate”for incoming signals.
Setting Squelch
Gate set to Desired
Squelch Setting (DSS)
Gate closed
2
1
Turn volume up
louder than normal.
Fully
closes the “gate”,
allowing no
clockwise
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 en ter.
incoming signals.
4
5
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37st manual layout.5 10/1/98 9:56 AM Page 12
Operation
Operation
Select Channel
LED Display
All needed information is displayed.
Select Channel
LED Display
1
Turn power ON.
3
2
For higher channel,
push UP arrow key.
For lower Channel,
push DOWN
arrow key.
Note
For quick advance, push and hold
arrow key(s).
hen
replacement.
Note
When switching from one chan-
nel to another, squelch will need
to be reset. See Setting Squelch
on page 4.
Charge/Pwr Save Button
The Charge/Pwr Save LED will
illuminate red when Power Save
button is pushed or when charg-
ing NiCad batteries with charger
plugged in.
6
7
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37st manual layout.5 10/1/98 9:56 AM Page 14
Operation
Operation
Transmit/Receive
Transmit/Receive
Note
While PTT button is pressed you
cannot receive transmissions.
1
To transmit,push and hold PTT button.
Note
Your HH 37 ST is always ready to
receive incoming signals when
the PTT button is released.
4
Release PTT button to receive incoming
transmissions.
2
TX/Batt (transmit) will illuminate red.
3
Hold mic about
2 inches from
mouth. Speak
in a normal
voice.
8
9
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37st manual layout.5 10/1/98 9:56 AM Page 16
Operation
Operation
TM
TM
The SoundTracker System
Activating SoundTracker
Activating
SoundTracker™
While previous systems only “blanket out”or limit
noise in higher sound frequencies, the revolution-
TM
Note
ary new SoundTracker 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.
SoundTracker™ gives you
clearer, cleaner reception to
improve CB communications
while on the air.
Note
This engages the SoundTracker™
system and reduces the noise level.
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.
1
Pushand release the
ST key.
TM
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
TM
SoundTracker CB, 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.
2
The SoundTracker™ LED will illuminate red.
On Transmission - “Strengthens signals going out”
TM
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.
10
11
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37st manual layout.5 10/1/98 9:56 AM Page 18
Operation
Operation
TM
Testing SoundTracker
Testing
SoundTracker™
Note
At times you may experience
different levels of noise
reduction.Different terrains
and environments will effect
the SoundTracker™ System’s
performance.
1
Select any unused channel on your CB.
3
Turn the volume up louder than your normal
listening level.
2
4
Fully
counterclockwise opens the “gate” and
Pushand release the
ST button.
all signals enter. Turn the knob until
it stops.
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
Operation
Operation
External Speaker/Microphone Jack
In Vehicle Use
In Vehicle Use
Note
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!).
The HH 37 ST can b e
connected to your
cigarette lighter with
the provided car cord.
This power connec-
tion does NOT charge
the batteries.
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
Power Saver-HI/LOW
Power Saver-
HI/LOW
External speaker/microphone is
not included with this unit. See
accessories on page 23 for avail-
able options.
Reduces the power to 1 watt. This does not
decrease the unit’s ability to receive but does
reduce the transmitting range.
1
Locate SPK/MIC jack on side of unit and
insert plug.
1
Push and
release
PWR Save
button.
Note
Battery life is increased approxi-
mately 50% while in Battery
Save LOW Mode.This reduces
power output to 1 watt.
2
Hold mic about
2
Power Save LED will
illuminate.
2 inches from
mouth. Speak
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 You
How Your CB Can Serve You
• Warn of traffic problems
The FCC gives these examples of permitted and
prohibited messages for channel 9. These are
only guidelines and not all-inclusive:
• 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
Permitted Example Message
Yes
“Tornado sighted six miles north
of town.”
• Keep you alert while traveling
No
“Post number 10.
A Few Rules You Should Know
No tornado sighted.”
A Few Rules
You Should
Know
A. Conversations cannot last more than 5 minutes
with another station. A one minute break is
required to let others use the channel.
Yes
“Out of gas on I-95 at mile
marker 211.”
B. You cannot blast others off the air by use of
illegally amplified transmitters or illegally
high an tennas.
C. You cannot use CB to promote illegal activities.
D. Profanity is not allowed.
No
“Out of gas in my driveway.”
Yes
“Four car accident on I-94 at
Exit 11. Send police and
ambulance.”
E. You may not transmit music with a CB.
No
“Traffic moving smoothly on I-94.”
F. Selling of merchandise and/or services is
prohibited.
Yes
“Weather Bureau has issued
thunderstorm warning.
Bring sailboat into port.”
1. Set to channel 9 for emergencies
Channel 9
Emergency
Messages
Be sure antenna is properly connected.
No
“Attention motorists.
Weather Bureau advises snow
tomorrow will accumulate
4 to 6 inches.”
2. CB Distress Data
When transmitting an emergency, you should
request a “REACT BASE”and provide the CB
distress data (called CLIP):
Note
Yes
No
“Fire in building at 539 Main,
Evanston.”
C all Sign Identify yourself.
L ocation Be exact.
I njuries Number.Type.Trapped?
P roblem Give details and help needed.
If no response on channel 9,
try channels 19 or 14.
“Halloween patrol number 3.
All quiet.”
Transmit CLIP repeatedly so any monitor can assist.
16
17
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37st manual layout.5 10/1/98 9:56 AM Page 24
How Your CB Can Serve You
How Your CB Can Serve You
Code Meaning
CB 10-Codes
CB 10-Codes
10-29 Time is up for contact
10-30 Does not conform to FCC rules
10-33 Emergency traffic
Citizen Bands have adopted the “10-CODES”for
standard questions and answers. These codes
provide quick and easy communication,especially
in noisy areas. Following are some of the more
common codes and meanings:
10-34 Trouble at this station
10-35 Confidential information
10-36 Correct time is
Code Meaning
10-37 Wrecker needed at
10-38 Ambulance needed
10-39 Message delivered
10-41 Turn to channel
10-1
10-2
10-3
10-4
10-5
10-6
10-7
10-8
10-9
Receiving poorly
Receiving well
Stop transmitting
OK,message received
Relay message
10-42 Traffic accident at
10-43 Traffic tie up at
Busy, stand by
10-44 Have a message for
10-45 All units within range please report
10-50 Break channel
Out of service, leaving
In service, subject to call
Repeat message
10-60 What is next message number?
10-62 Unable to copy. Use phone
10-63 Net directed to
10-10 Transmission completed standing by
10-11 Talking too rapidly
10-12 Visitors present
10-64 Net clear
10-13 Advise weather/roads
10-16 Make pick up at
10-65 Awaiting your next message/assignment
10-67 All units comply
10-17 Urgent business
10-18 Anything for us?
10-19 Return to base
10-70 Fire at
10-71 Proceed, transmission in sequence
10-77 Negative contact
10-20 My location is
10-81 Reserve hotel room for
10-82 Reserve room for
10-21 Call by phone
10-22 Report in person to
10-23 Stand by
10-85 My address is
10-91 Talk closer to mic
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
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
18
19
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37st manual layout.5 10/1/98 9:56 AM Page 26
Frequency Ranges
HH37 ST Specifications
GENERAL
The COBRA HH37 ST transceiver represents one of
CHANNELS . . . . . . . . . . . . . . . . . . CB - 40 CH
FREQUENCY RANGE. . . . . . . . . . CB - 26.965 TO 27.405 MHZ
FREQUENCY TOLERANCE . . . . . 0.005 %
FREQUENCY CONTROL . . . . . . . PLL (PHASE LOCK LOOP) SYNTHESIZER
OPERATING TEMPERATURE
RANGE. . . . . . . . . . . . . . . . . . . . . . -30° C TO + 50° C
MICROPHONE. . . . . . . . . . . . . . . . ELECTRET, PUSH-TO-TALK
INPUT VOLTAGE . . . . . . . . . . . . . 13.0V DC,INTERNAL BATTERIES
13.8 VDC,EXTERNAL
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
Freq.
Channel
Freq.
ANTENNA CONNECTOR. . . . . . . TYPE BNC
CB
CB
Channel In MHz Channel In MHz
TRANSMITTER
POWER OUTPUT . . . . . . . . . . . . . 3.5 W AT 12 VDC - HIGH,0.8 W IN LOW
4.0 W AT 13.8 VDC - HIGH,1.0 IN LOW
MODULATION . . . . . . . . . . . . . . . AM
FREQUENCY RESPONSE. . . . . . . 300 - 3000 HZ AT -6 DB
OUTPUT IMPEDANCE. . . . . . . . . 50 OHMS,UNBALANCED
1
2
3
4
5
26.965 21
26.975 22
26.985 23
27.005 24
27.015 25
27.215
27.225
27.255
27.235
27.245
RECEIVER
CB
SENSITIVITY. . . . . . . . . . . . . . . . . . LESS THAN 1 uV FOR 10 DB S/N
IF FREQUENCY. . . . . . . . . . . . . . . DUAL CONVERSION
1 ST - 10.690 MHZ,2ND - 455 KHZ
AUDIO OUTPUT. . . . . . . . . . . . . . 500 mW MAXIMUM AT 10 % DISTORTION
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
6
7
8
9
27.025 26
27.035 27
27.055 28
27.065 29
27.075 30
27.265
27.275
27.285
27.295
27.305
10
FREQUENCY CONTROL . . . . . . . PLL (PHASE LOCK LOOP)
MAX.SIGNAL TO NOISE RATIO. 58 DB WITH ST ON
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 DB WITH ST OFF
11
12
13
14
15
27.085 31
27.105 32
27.115 33
27.125 34
27.135 35
27.315
27.325
27.335
27.345
27.355
16
17
18
19
20
27.155 36
27.165 37
27.175 38
27.185 39
27.205 40
27.365
27.375
27.385
27.395
27.405
20
21
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37st manual layout.5 10/1/98 9:56 AM Page 28
Limited Two Year Warranty
Optional Accessories
COBRA ELECTRONICS CORPORATION warrants that its
Magnetic Mount
Weather Antenna
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.
Allows greater
transmission range
while in a moving
120 Volt A/C Wall Charger
with Plug
vehicle.
Ear Bud Mic with PTT
ATW-400
$29.95
Integratedspeaker/micadapterthat
fitsinyourear. Includesshirt clip.
MA-EBM
Charges 9Ni-Cadbatterycells in24
hoursrightintheunit.
COBRA will,without charge, repair or replace, at its option,
defective CB radios, products or component parts upon
delivery to the COBRA factory Service Departmen t, accom-
panied by proof of the date of first consumer purchase,
such as a duplicated copy of a sales receipt .
$29.95
CA-25
$10.00
Cobra Electronics
Corporation
6500 West Cortland Street
Chicago,Illinois 60707
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.
Vox Mic
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 alter-
ations 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.
Lapel Microphone
VOX (VoiceOperatedTransmitter)
adapetrallowsyouhands-freeoperation.
MA-VOX
BNC/SO239 Antenna Adapter
Remote microphone/speaker
connection.
CA-40
Allows connection of the45WX ST
to standard antennas.
$49.95
$25.95
CA-43
$5.95
You Can Find These Fine
Accessories At Your Local
Cobra CB Dealer
All implied warranties, including warranties of
(1) High Performance Ni-Cad
Rechargeable Battery Cell
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, consequen-
tial or other damages;including, without limitation,
damages resulting from loss of use or cost of installation.
212-001-N-001
$3.95ea.
If you wish, you can order
directly from Cobra.
Long Range Antenna
Order by phone
Call 1.773.889.3087
(Press 1 from the main menu)
8 a.m.-8 p.m. M-F CST.
Doubles the range
of your HH37 ST.
Some states do not allow limitations on how long an
implied warranty lasts and/or do not allow the e xclusion
or limitation of incidental or consequential damages, so
the above limitations may not apply to you.
CA-41
$25.95
Order by mail or fax
Please fill out order form
on next page, and mail/fax
directly to Cobra.
Replacement Belt Clip
HA-BC
$4.95
22
23
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37st manual layout.5 10/1/98 9:56 AM Page 30
Accessory Order Form
Item #
Description
Cost Ea. Qty. Amount
MA-EBM Ear Bud Mic
MA-VOX Vox Mic
$29.95
$49.95
$3.95
212-001-N-001 (1) Ni-CadRechargeable BatteryCell
HA-BC Replacement Belt Clip
CA-25 120V A/CWallCharger with Plug
CA-40 Lapel Microphone
CA-41 Long Range Antenna
ATW-400 Magnetic Mount Weather Antenna
CA-43 BNC/S0239 Antenna Adapter
$4.95
$10.00
$25.95
$25.95
$29.95
$5.95
Prices subject to change without notice.
Subtotal
(Tax if applicable)
Shipping/handling
Total
Tax Table
Illinois residents add 7%
Cook Co.residents add .75% (7.75% total)
Chicago residents add 1% (8.75% total)
$4.00
Indiana residents add 5%
Michigan residents add 4 %
Minnesota residents add 6%
Ohio residents add 6%
Wisconsin residents add 5%
For credit card orders fill out order
form and fax to:1.773.622.2269
or call 1.773.889.3087
Make checkor money order (no stamps)
payable to:
Cobra Accessories Dept.
(Press 1 from the main menu)
8:00 am - 8:00 pm,M-F,CST.
6500West Cortland St.Chicago,IL 60707
Please print clearly
Name
Address (No P.O. Box)
City
Zip
State
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.
24
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