Cobra 37STML Service Manual

37st manual layout.5 10/1/98 9:56 AM Page 1

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.

Part No. 480-270-P-001

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 .”

37 ST

The CB Story

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.”

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

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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

5 7

2 3

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.

SoundTracker

1 6

1 7

1 8

1 3

1 2

1 4

“Cuts noise coming in...strengthens signals going out.”

This Patent pending technology dramatically improves transmission and reception of CB signals.

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

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

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How to Use Your

Contents

Features...........................................................................1

The CB Story..................................................................A1

FCC Regulations FCCWarnings Included Accessories

Controls & Indicators.................................................A2

Our Thanks toYou.......................................................A3

SoundTracker Customer Support

Operating Your HH 37 ST

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

SoundTracker™System...........................................10

In Vehicle Use.............................................................14

Power Saver (HI/LOW)............................................14

External Speaker/Microphone.............................15

HowYour CB Can ServeYou....................................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

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

Microphone Jack

37 ST

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OperationOperation

Attach Antenna

Insert.

Turn clockwise.

Attach Belt Clip

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.

Install Batteries

Remove battery chamber cover.

Install batteries by polarity markings.

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.

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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.

Turn volume up louder than normal.

Fully clockwise closes the “gate”, allowing no incoming signals.

Fully counterclockwiseopens the “gate”and all signals enter.

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)

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