Cobra 29 LX Professional CB Radio

Our Thanks, The History of CB Radio, and Customer Service

History of CB Radio (Citizens Band)
Invented by Al Gross in 1945, CB radio initially served as a communication method for soldiers during World War II. After the war, Gross strove to make two-way radios a personal communication medium, and the Citizens Band was established by law in the U.S. in 1949. It wasn't until the 1970s that technology evolved, and the CB radio market became popular as a communication method for drivers to signal police speed traps and road hazards.

The Citizens Band service consists of 40 frequency channels, mostly spaced 10 kHz apart. Transmitter power is limited to 4 watts in the U.S., and range can vary depending on terrain and product quality.

Currently, Citizens Band service does not require a license to operate, regardless of age, as long as usage regulations established by the Federal Communications Commission (FCC) in the U.S. are respected.

Petition to Amend FCC Section 95 Regulations
In 2016, Cobra petitioned the FCC to revise Section 95 regulations to allow CB radios to use Frequency Modulation (FM). Cobra argues that FM offers better voice quality and reduced noise interference, enhancing the quality of two-way radios and providing a customer benefit.

Through the direct efforts of Cobra Electronics and the enthusiastic support of its loyal customers and distribution network, the FCC granted the request. In 2021, Part 95 was officially updated to include FM as an option for two-way radio use.

Today, thanks to Cobra Electronics' petitions to improve Citizens Band quality, users can enjoy the benefits of CB radio communication across a wide range of sectors.

Customer Support
If you encounter problems with this product, do not understand its features, menu, or installation, please refer to the user manual. If you need additional assistance after reading this manual, we are here to help you:

Questions about Service, Orders, and Products
For repair, product questions, and service hours, call 1 800 543-1608 or visit www.cobra.com.

For Assistance Outside the United States
Contact your local dealer.

Features of the 29 LX AM/FM Radio

Front Panel Controls:

Top Row (Left to Right): NB/ANL Button, Signal Strength Meter, LCD Screen, Scan/Memory Button, CB/WX/PA Button, AM/FM/Channel 9/19 Button, DIMMER/DAY or NIGHT Modes.

Middle Row (Left to Right): S/RF/SWR/CAL Button, VOL-SQ (Volume/Squelch) Knob, DYNAMIKE® Knob, MENU PUSH ENTER Button, RF GAIN Knob, DELTA TUNE Knob, TALKBACK/SWR CAL Knob.

Bottom Row (Left to Right): 4-pin Microphone Jack, On/Off/Volume/Squelch Control, Dynamike®, Menu/Enter/Channel Selector, PA Jack, External Speaker Jack.

Rear Panel Connections:

Antenna Connector, Power Connector.

Microphone:

The microphone features a Push-To-Talk (PTT) button and a 4-pin connector.

FCC Remarks:
This device complies with Part 15 of the FCC Rules. Operation is subject to two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. The manufacturer is not responsible for any radio or television interference caused by unauthorized modifications to this equipment. Such modifications could void the user's authority to operate the equipment.

Installation

Location
Plan the location for the CB transceiver and microphone holder before installation. Choose a location that is convenient for use but does not obstruct the driver or passenger. The transceiver is typically mounted under the dashboard, with the microphone holder beside it. NOTE: The transceiver is held by a universal mounting bracket with wing screws for angle adjustment. The bracket includes two self-tapping screws and star washers. Mounting must be mechanically secure and the location convenient.

Mounting and Connection

1. Hold the radio with the mounting bracket in the desired location. If there is no interference, remove the bracket and use it as a template to mark the screw locations.
2. Drill holes and secure the bracket.
3. Connect the antenna cable plug to the "ANT" jack on the rear of the unit.
4. Connect the red DC power cord wire to a 12-volt accessory fuse or directly to the battery. NOTE: The transceiver is held by a universal mounting bracket...
5. Connect the black wire to the negative side of the vehicle's electrical system, usually the chassis. Any convenient location with good electrical contact (paint removed) can be used. NOTE: Before installing the CB radio, visually check vehicle battery connections to determine positive/negative terminals. A vehicle grounded by the negative terminal will have its negative wire grounded to the chassis.
6. Connect the power cable to the "POWER" jack on the rear of the unit. Observe polarity markings.
7. The microphone can be attached to either side of the radio using provided screws. It can also be mounted on the dashboard or other convenient location.
8. Secure the microphone to the front of the CB radio. NOTE: If the microphone is not connected, no sound will be heard through the speaker.

PA (Public Address)

1. Connect an external PA speaker to the PA jack on the rear panel.
2. Press the CB/PA/WX button to change modes. NOTE: The PA speaker must have 8-ohm impedance and at least 4.0 watts nominal power. The speaker should be directed away from the microphone to prevent acoustic feedback. CB channel activity will be heard through the PA speaker. Adjust volume to a normal listening level.

CB Antenna
The transmitter's maximum output power is limited by the FCC, and the antenna plays a crucial role in transmission distance. Only a properly matched antenna system will allow for maximum output power. Cobra's loaded antenna models are highly recommended for most installations. Consult your Cobra dealer for more details or call 1 800 543-1608 to speak with a Cobra representative. A standard antenna connector is provided on the transceiver for easy connection.

For optimal performance in passenger cars, the ideal antenna location is the center of the roof. The second-best location is the center of the trunk. For trucks with fiberglass door panels, the exterior mirror should be grounded to the chassis using a ground strap when the antenna is mounted on the mirror bracket.

Three-way antennas are also available and allow the use of all three bands (AM-FM and CB) with a single antenna. However, this type of antenna generally has a lower-than-normal transmission and reception range compared to standard single-band CB antennas.

Cobra offers CB antennas and mounting solutions that can be purchased online. Please visit www.cobra.com, or if you wish to speak with an expert, please call 1 800 543-1608 and a member of our customer service team can assist you.

Operation

Powering On Your CB Radio
Ensure the power cord, antenna, and microphone are connected to their respective connectors before starting.

1. Turn the On/Off volume knob clockwise to power on the unit and set it to a normal listening level.
2. Press the CB/PA/WX button to change modes.

Setting AM/FM Modulation and Channels 9/19
The Cobra 29 LX radio allows communication in AM or FM mode. Each mode operates on channels 1 through 40. AM is the default mode.

To switch between AM and FM modes, briefly press the AM/FM button until the desired operating mode is displayed. Once selected, the chosen mode (AM or FM) appears to the right of the displayed channel on the LCD screen. To change and cycle between Channel 9, Channel 19, and the current channel, press and hold the AM/FM button.

Setting the Channel Selector
Select any of the forty channels and adjust the volume. The selected channel (1 to 40) is indicated by the display located directly above the channel selector knob.

SWR Calibration (Standing Wave Ratio)
SWR calibration allows for proper antenna length adjustment and monitoring of coaxial cable and all RF connections. This calibration is essential for achieving optimal performance.

1. Select Channel 20.
2. Press the SWR/CAL button to select CAL.
3. Press and hold the microphone button.
4. While holding the microphone button, adjust the SWR CAL knob so that the meter needle swings to the CAL mark on the meter (located on the right).
5. Release the PTT button, then press and release the S/RF-SWR CAL button to ROS. Then press the PTT button to read the SWR.
6. Repeat steps two through five on channels 1 and 40. This procedure verifies the SWR for all channels.

S/RF Meter
Oscillates proportionally to the RF output (outgoing signal) during transmission. The S/RF-SWR-CAL knob should be in the S/RF mode.

To Receive
Turn the On/Off volume knob clockwise. The RX icon displays.

Selecting a Channel
The unit must be in CB mode. Turn the channel selector knob clockwise or counter-clockwise to select the desired channel.

S-meter
Oscillates proportionally to the incoming signal strength during reception. The S/RF-SWR-CAL switch must be in the S/RF position to read the value.

Operation (Continued)

To Transmit

1. Select the desired channel.
2. Press and hold the microphone button to transmit. The transmitter is now active. During transmission, hold the microphone two inches from your mouth and speak clearly in a normal voice. Release the button to receive. NOTE: Ensure the antenna is properly connected to the radio before transmitting. Prolonged transmission without an antenna, or with an improperly matched antenna, can damage the transmitter.

Read the regulations and FCC regulations provided with this unit before transmitting.

Adjusting the Dynamike® Control
First, turn the knob fully clockwise to achieve maximum volume. In some conditions, it may be necessary to reduce the Dynamike control setting.

External Speaker
The external speaker jack is used for remote monitoring of the receiver. Connect an external speaker to the external speaker jack on the rear panel. NOTE: The external speaker must have an 8-ohm impedance and a nominal power rating of at least 4.0 watts. When the external speaker is connected, the internal speaker is automatically disconnected. Refer to the accessories page for details. NOTE: Cobra external speakers have a 10-watt power rating.

Front Panel Controls

NB-ANL/OFF Button (Noise Blanker/Automatic Noise Limiter)
When set to ANL, the automatic noise limiter activates. This helps reduce noise created by the vehicle's electronics. In NB/ANL mode, the RF Noise Blanker is also active, which helps filter noise better. In OFF mode, noise filtration is completely deactivated. NOTE: The RF Noise Blanker is very effective in reducing repetitive noises such as ignition system interference.

RF Gain Control
RF Gain is used to optimize reception in areas where the signal is strong or weak. Turn the RF Gain knob counter-clockwise to reduce gain in strong signal areas. In weak signal areas, turn the knob clockwise to increase gain. NOTE: RF Gain is used to optimize reception in areas where the signal is weak.

Operation (Continued)

CB Channel Scan
To scan all 40 CB channels, the unit must be set to squelch. Press the Scan/Mem Scan button once, then release.

Memory Channel Scan
To scan memory channels, press the Scan/Mem Scan button twice, then release.

Dimmer Control
Press Dim to cycle between Day (Day) and Night (Night) brightness settings. Press and hold the Dim button to cycle between Day and Night modes. Refer to page 17 for Day (Day) and Night (Night) color and brightness adjustment instructions.

Squelch Adjustment
Squelch is the "gate control" for incoming signals.

1. A full clockwise rotation closes the "gate," allowing only very strong signals to enter.
2. A full counter-clockwise rotation opens the "gate," allowing all signals to enter.
3. To obtain the desired squelch setting (DSS), turn the squelch control counter-clockwise until you hear noise. Then, turn the control clockwise until the noise stops. This is the DSS setting.

Menu Mode
Allows setting of special functions. The Menu/Enter button is used to move the cursor to the function to be set. Turn the Menu/Enter knob clockwise to navigate through the menu levels. NOTE: To exit menu mode, you can select Exit in the menu, wait for the menu "timer" to expire, or press the PTT switch (from the microphone).

Menu Levels:

• Level 1: ►SET CLOCK, ALARM CLOCK, SET COUNT DOWN
• Level 2: ►KEY TONES, WX ALERT, WX ALERT SCAN
• Level 3: ►WX AUTO SCAN, DISPLAY COLOR, BRIGHTNESS
• Level 4: ►CONTRAST, RADIO CHECK, UTILITY
• Level 5: ►EXIT

Operation (Continued)

Setting the Clock
Use the clock, alarm, and countdown functions. To set the clock, press the Menu/Enter button and select Set Clock (Set Clock). NOTE: The normal display appears if the clock has not yet been set. 12:00 PM displays on the screen and the hours blink. Turn the Menu/Enter knob clockwise to select the desired hour, then press the button to set the hour. The minutes will then blink. Turn the Menu/Enter knob again to select the desired minutes, then press the button to set the minutes. Once the minutes are set, AM or PM blinks. Turn the Menu/Enter knob again to select AM or PM, then press and release the button to exit the SET CLOCK menu. NOTE: Use the PTT switch to exit any MENU level and return to CB standby mode.

Setting the Wake-Up Alarm
Your 29 LX radio can be used as a wake-up alarm. To set the wake-up alarm, press the Menu/Enter button and select Alarm Clock (Alarm Clock). Turn the Menu/Enter knob clockwise to select Set Alarm Time (Set Alarm Time). Follow the instructions above to set the alarm time and AM or PM. NOTE: The clock must be connected to a constant 12V supply to operate continuously.

Alarm Settings (Snooze, Length, Exit)
Once the wake-up alarm setting is complete, you can set the Set Snooze (Alarm Snooze), Alarm Length (Alarm Duration), and Exit functions. Enter the desired snooze time (from 1 to 60 minutes). Select Enter to exit and return to the alarm snooze or alarm duration setting. Select the Alarm Length function to set the alarm duration (from 10 to 300 seconds). By pressing the Menu/Enter button, the unit will return to Exit (Quit), Set Snooze (Alarm Snooze), or Alarm Length (Alarm Duration). NOTE: The default alarm snooze duration is 10 minutes. NOTE: Use the PTT switch to exit any MENU level and return to CB standby mode. NOTE: The default alarm duration is 60 seconds and is set in 10-second increments.

Setting the Countdown Timer
To set the countdown timer, press the Menu/Enter button and select Set Count Down (Set Countdown Timer). To use the countdown function, you must select Count Down (first menu option) and set it to ON by pressing and releasing the Menu button. Then, select Set Count Down (Set Countdown Timer) and set the hours and minutes by turning the Menu knob to the desired time, then press and release it to save your settings. NOTE: The clock must be connected to a constant 12V supply to operate continuously.

Key Tone Mode
Press the Menu/Enter button and turn it clockwise until Key Tones (Key Tones) is displayed. Press the Menu/Enter button to select On/Off and exit the main menu.

Weather Information

What to Know About the Weather
In the event of threatening weather conditions, the National Weather Service may issue a 10-second alert tone. This tone will be heard by the CB radio, even if the CB/WX command is in CB mode or the unit is turned off.

This allows you to monitor CB frequencies while continuing to receive emergency alerts from the National Weather Service. When you hear the alert, press the CB/WX/PA button in WX mode. You will then be able to hear the weather alert bulletin.

Your 29 LX radio is equipped with a special automatic squelch circuit for weather transmissions that disables your squelch control.

NOTE: If you wish to receive a list of NOAA weather radio transmitter locations, contact your nearest National Weather Service office. Otherwise, write to: National Weather Service (Attn: W/0M11) NOAA Silver Springs (Maryland) 20910. For ideal weather reception, use a dual-band antenna (center-loaded/base-loaded).

Weather Channels
What is weather radio? NOAA Weather Radio (NWR in English) is a service of the National Oceanic and Atmospheric Administration (NOAA), part of the U.S. Department of Commerce. A total of 380 NWR stations are operated by the U.S. government, in addition to several NWR stations managed by private interest groups. The capability is to supplement warnings with sirens and commercial radio and television. The ten national weather channels offer complete coverage to keep you informed of weather conditions, 24 hours a day, 7 days a week.

NOTE: To exit menu mode, you can select Exit (Quit) in the menu, wait for the menu "timer" to expire, or press the PTT switch (from the microphone).

Operation (Continued)

Setting the Weather Alert Mode

1. Enable/disable (On/Off) WX alerts. The default value is Off (disabled). Press the Menu/Enter button to select Set WX Alert (Set WX Alert). If weather is active, the WX alert icon displays.
2. Press the Menu/Enter button to select On/Off and exit the main menu.

Setting Weather Alert Scan

1. Press the Menu/Enter button and turn it clockwise until WX Alert Scan (WX Alert Scan) is displayed. Press the Menu/Enter button to select On/Off.
2. Press the Menu/Enter button to select On/Off and exit the main menu. NOTE: If an alert is detected, the unit activates WX mode on the channel with the alert. Use the Menu/Enter button to select On/Off and press the button to set.

Automatic Weather Scan
Automatic weather scan searches for the weather station with the strongest signal in the background. Once the station is found, the scan stays on that active weather station, allowing you to instantly access weather information when needed.

Setting Automatic Weather Scan

1. Press the Menu/Enter button and turn it clockwise until WX Auto Scan (WX Auto Scan) is displayed. Press the Menu/Enter button to select On/Off.
2. Press the Menu/Enter button to select On/Off and exit the main menu.

Operation (Continued)

Setting Display Color

1. Select the Menu/Enter button and scroll down to select the display color options. Two color choices are possible: Day (Day) or Night (Night).
2. Select the Day (Day) or Night (Night) mode by turning the Menu/Enter knob. Press and release the Menu/Enter button to select.
3. Turning the Menu/Enter knob clockwise changes the display color (from green to blue, to amber, to red, and back to green).
4. Press the Menu/Enter button to select the color. Select Exit (Quit) to return to the main menu. NOTE: Use the PTT switch to return to CB standby mode. NOTE: To exit menu mode, you can select Exit (Quit) in the menu, wait for the menu "timer" to expire, or press the PTT switch (from the microphone).

Setting Brightness
Select the Menu/Enter button and scroll down, then select Brightness to adjust the level. Brightness can be adjusted for Day (Day) and Night (Night) modes.

1. To adjust, use the Menu/Enter button to select the Day (Day) or Night (Night) options. Press and release the button to select.
2. Select the Day 1 or Day 2 option by pressing the Menu/Enter button. Turn the knob to adjust the brightness level.
3. Select Exit (Quit) to return to the previous Day (Day) or Night (Night) options or press the PTT switch on the microphone to exit the menu completely. Once the day options are set, you can switch between brightness levels using the DIM switch located on the front panel. NOTE: If you attempt to exceed the highest or lowest brightness level, an error beep will be heard.

Setting Contrast

1. Press the Menu/Enter button and turn it clockwise to select Set Contrast (Set Contrast). Press the Menu/Enter button again and turn it clockwise to increase contrast and counter-clockwise to decrease it.
2. Press the Menu/Enter button to set the contrast. NOTE: If you attempt to exceed the highest or lowest contrast level, an error beep will be heard. NOTE: For an optimal view, the contrast level should be set for each color.

Operation (Continued)

Radio Check Mode
Allows testing of important radio functions.

Test 1 - Battery Voltage: Confirms that the battery voltage is between 10.8 V and 15.8 V. If it is within this range, the message "PASS" (Success) is displayed. Outside this range, the message "FAIL LOW" (Failure - Low) or "FAIL HIGH" (Failure - High) is displayed. Press the Menu/Enter button to proceed to the next test. NOTE: Use the PTT switch to return to CB standby mode. The unit proceeds to the second test after 10 seconds or if you press the Enter button.

Test 2 - RF Output Power: Confirms an output power of 3.3 to 4 watts. When you press the "Push-to-Talk" button (instant talk), the message "PASS" (Success) or "FAIL" (Failure) is displayed if the power level is outside the limits. NOTE: Press the Push-To-Talk button within 10 seconds, otherwise the unit will proceed to the next test. Press the Dim/Escape button to return to CB standby mode. The unit proceeds to the third test after 10 seconds or if you press the Enter button.

Test 3 - Antenna Mismatch Warning: Press the "Push-to-Talk" button (instant talk) to check if the antenna/radio is properly matched. NOTE: Use the PTT switch to return to CB standby mode. The test ends after 10 seconds or if you press the Enter button. The unit then returns to CB standby mode.

Operation (Continued)

Utility Mode (Software Version and Reset)
Utility menu options allow you to display the current software version or reset the unit to its original factory settings. To display the software version, turn the Menu/Enter knob clockwise to select Settings, then Software Version (Software Version).

1. To reset to default settings, press the Menu/Enter button again. Turn the Menu/Enter knob clockwise to select Settings, then Go To Default (Go to default settings).
2. Press the Menu/Enter button to reset to default settings. Choose NO (NON) to keep the current setting without change. NOTE: The default display color is green.

Operation (Continued)

Base Station Operation (from 120 VAC Household Power)
To operate the transceiver from home or office, you will need a 13.8-volt DC power supply with a minimum capacity of 2 amperes and a properly installed base station antenna.

WARNING: Do not attempt to operate this transceiver by connecting it directly to a 120V AC supply.

1. Simply connect the red (+) and black (-) wires of the transceiver to the corresponding terminals of the power supply.
2. Connect the power cable to the "POWER" jack on the rear of the unit. Be sure to observe the polarity markings.
3. Connect a properly installed and matched base station antenna.

Temporary Mobile Use
For temporary mobile use, you can purchase an optional 12V power adapter and a magnetic mount antenna to allow you to quickly install your transceiver for temporary use.

To purchase accessories for mobile operations, visit cobra.com. Do you have questions? Call customer service at 1 800 543-1608.

Cobra offers mobile solutions that can be purchased online. Please visit www.cobra.com, or if you wish to speak with an expert, please call 1 800 543-1608 and a member of our customer service team can assist you.

How Your CB Radio Can Serve You

Your CB radio can:

• Warn you of traffic problems
• Provide weather and road data
• Provide emergency assistance
• Provide direct contact with home or office
• Help police services by reporting erratic drivers
• Obtain "local information" to find friends
• Communicate with family and friends
• Suggest places to eat and sleep
• Help you stay alert while traveling

Some Rules to Know:

A. Conversations cannot last more than five minutes with another station. A one-minute pause is necessary to allow other people to use the channel.

B. You cannot block others' transmissions by using illegally amplified transmitters or illegally high antennas.

C. You cannot use the CB radio to promote illegal activities.

D. Profanity is not allowed.

E. Transmitting music with a CB radio is prohibited.

F. The sale of merchandise and/or services is prohibited.

Setting Channel 9 for Emergencies
Ensure the antenna is properly connected.

CB Distress Data
When transmitting an emergency, you must request "REACT BASE" and provide the CB distress data (called CLIP):

• C: Call Sign (Identify yourself.)
• L: Location (Be precise.)
• I: Injuries (Number. Type. Are you trapped?)
• P: Problem (Provide details and state the assistance needed.)

Transmit the CLIP data multiple times so that anyone monitoring can assist.

NOTE: If there is no response on Channel 9, try Channels 19 or 14.

How Your CB Radio Can Serve You (Continued)

The FCC provides these examples of authorized and prohibited messages for Channel 9. These examples are guidelines only and do not constitute an exhaustive list:

Authorized	Example Message
Yes	"Tornado sighted six kilometers north of town."
No	"Station number 10. No tornado sighted."
Yes	"Out of gas on highway I-95 at kilometer 211."
No	"I am out of gas in my driveway."
Yes	"Accident involving four cars on highway I-94 at exit 11. Send police and ambulance."
No	"Traffic is flowing on highway I-94."
Yes	"Weather service issued a storm warning. Bring the sailboat to port."
No	"Attention motorists. Weather service forecasts four to six inches of snow for tomorrow."
Yes	"Fire in a building at 539 Main, Evanston."
No	"Halloween patrol number 3. Nothing to report."

10 CB Codes

Citizen Band radio users have adopted "10 CODES" for standard questions and answers. These codes allow for quick and easy communication, especially in noisy environments. Here are some of the most common codes and their meanings:

Code	Signification	Code	Signification
10-1	Poor reception	10-34	Trouble at this station
10-2	Good reception	10-35	Confidential information
10-3	Stop transmitting	10-36	Correct time is
10-4	OK, message received	10-37	Need tow truck at
10-5	Relay message	10-38	Need ambulance
10-6	Busy, stand by	10-39	Message delivered
10-7	Out of service, leaving	10-41	Tune to channel
10-8	In service, can receive call	10-42	Traffic accident at
10-9	Repeat message	10-43	Pile-up at
10-10	Transmission complete, standing by	10-44	Message for
10-11	Talk too fast	10-45	All units within range, please report
10-12	Visitors present	10-50	Break channel
10-13	Weather/road conditions advisory	10-60	What is the next message number?
10-16	Pick up at	10-62	Cannot understand. Use phone
10-17	Urgent situation	10-63	Destination directed to
10-18	Anything for us?	10-64	Clear channel
10-19	Return to base	10-65	Awaiting your next message/traffic
10-20	My location is	10-67	All units comply
10-21	Call by phone	10-70	Fire at
10-22	Report in person at	10-71	Proceed, single transmission
10-23	Stand by	10-77	Negative contact
10-24	Completed last tour of duty	10-81	Reserve hotel room for
10-25	Can you contact	10-82	Reserve room for
10-26	Disregard last information	10-85	My address is
10-27	Change channel to	10-91	Talk closer to the mic
10-28	Identify your station	10-93	Check my frequency on this channel
10-29	Time is expired for contact	10-94	Give long count
10-30	Does not conform to FCC regulations	10-99	Mission completed, all units secure
10-33	Emergency traffic	10-200	Police needed at

Frequency Ranges

The Cobra 29 LX transceiver is part of the most advanced AM/FM two-way radios used as a Class D station in the Citizens Band public radio service. These units are equipped with an advanced Phase Lock Loop (PLL) circuit providing complete coverage of the 40 CB channels.

Channel CB	Frequency, MHz	Channel CB	Frequency, MHz
1	26.965	21	27.215
2	26.975	22	27.225
3	26.985	23	27.255
4	27.005	24	27.235
5	27.015	25	27.245
6	27.025	26	27.265
7	27.035	27	27.275
8	27.055	28	27.285
9	27.065	29	27.295
10	27.075	30	27.305
11	27.085	31	27.315
12	27.105	32	27.325
13	27.115	33	27.335
14	27.125	34	27.345
15	27.135	35	27.355
16	27.155	36	27.365
17	27.165	37	27.375
18	27.175	38	27.385
19	27.185	39	27.395
20	27.205	40	27.405

29 LX Radio Specifications

GENERAL
CHANNELS: CB - 40 CHANNELS
FREQUENCY RANGE: CB – 26.965 to 27.405 MHz, WX - 162.400 to 162.775 MHz
FREQUENCY TOLERANCE: 0.005%
FREQUENCY CONTROL: PLL SYNTHESIZER (PHASE LOCK LOOP)
OPERATING TEMPERATURE RANGE: -30°C to 50°C
MICROPHONE: Dynamic, plug-in
INPUT VOLTAGE: 13.2 VDC nom. (positive or negative ground)
CURRENT CONSUMPTION: Transmit: Full modulation AM, 1.5 A (maximum); Receive: Full squelch, 0.3 A; Full audio, 1.2 A (nominal)
DIMENSIONS: 25.5 cm W x 18.5 cm D x 6.4 cm H (10.04 in W x 7.28 in D x 2.52 in H)
WEIGHT: 1.52 kg (3.36 lb)
ANTENNA CONNECTOR: UHF; SO-239 meter indicates relative output power, received signal strength, and SWR.

TRANSMITTER
OUTPUT POWER: 4 watts
MODULATION: AM (amplitude modulation) and FM (frequency modulation)
FREQUENCY RESPONSE: 300 to 3,000 Hz
OUTPUT IMPEDANCE: 50 ohms, unbalanced

RECEIVER
SENSITIVITY: AM less than 1uV for 10 dB (S+N)/N; FM -116 dBm @ 12 dB SINAD typical
SELECTIVITY: 6 dB @ 7 KHz, 60 dB @ 10KHz
IMAGE REJECTION: 80 dB, typical
ADJACENT CHANNEL REJECTION: 60 dB, typical
IF FREQUENCIES: Double conversion: 1st: 10.695 MHz, 2nd: 455 KHz
AUTOMATIC GAIN CONTROL (AGC): Less than 10 dB variation in audio output for 10 to 50,000 microvolts input.
RF GAIN RANGE: 40 db
NOISE BLANKER: Type RF
SQUELCH: Adjustable; threshold below 1µV
AUDIO OUTPUT POWER: 4 watts
FREQUENCY RESPONSE: 300 to 3,000 Hz
DISTORTION: Less than 7% @ 3 watts @ 1,000 Hz
BUILT-IN SPEAKER: 8 ohms, 5 w
EXTERNAL SPEAKER (not supplied): 8 ohms; disconnects internal speaker when connected.

PA SYSTEM (PUBLIC ADDRESS)
OUTPUT POWER: 4 watts into an external speaker.
EXTERNAL SPEAKER FOR PA (not supplied): 8 ohms, 4 watts min. The PA speaker also controls the receiver; a separate jack is provided for this purpose.
(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)

Two-Year Limited Warranty

Warranty Conditions:
Cobra warrants your product against defects in materials and workmanship for a period of two (2) years from the original date of purchase. Cobra, at its sole discretion, will repair or replace your product (with an identical or comparable product) free of charge. Cobra will not pay for shipping costs incurred to send us your product. Collect-on-delivery products will be refused.

To make a warranty claim, we will require proof of purchase in the form of an invoice or receipt. No proof of purchase is required for purchases made directly from the factory.

Warranty Exclusions: The warranty does not apply to your product in the following situations: 1. The serial number has been removed or altered. 2. Your product has been subjected to misuse or damage (including water damage, physical abuse, and/or improper installation). 3. Your product has been modified in any way. 4. Your receipt or proof of purchase is from an unauthorized reseller or an Internet auction site, including E-bay, U-bid, or other unauthorized resellers.

WARRANTY LIMITATION: EXCEPT AS EXPRESSLY PROVIDED HEREIN, YOU ACQUIRE THE PRODUCT "AS IS" AND "WHERE IS," WITHOUT REPRESENTATION OR WARRANTY. COBRA EXPRESSLY DISCLAIMS ALL REPRESENTATIONS OR WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THOSE CONCERNING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. COBRA SHALL NOT BE LIABLE FOR CONSEQUENTIAL, SPECIAL, OR INCIDENTAL DAMAGES, INCLUDING, BUT NOT LIMITED TO, DAMAGES RESULTING FROM THE USE, MISUSE, OR ASSEMBLY OF THE PRODUCT.

The limitations or exclusions above will be limited to the extent they violate the laws of a particular country, state, or province. Cobra is not responsible for products lost in shipping between the owner and our service center.

General Warranty Information:
Every product we manufacture is covered by our factory warranty. While each product may have unique components and policies, the general directive below will apply to most Cobra products. All Cobra products purchased directly from the factory or from our authorized dealers will come with a full one- to three- (1-3) year warranty from the date of original retail purchase (see policy statement above for full warranty details and exclusions). Standard accessories packaged with each model will have a one-year factory warranty. Accessories have a one-year factory warranty. Shipping to our center is not covered by our warranty. Return shipping is included in the United States. This warranty is non-transferable. For clarity, "repair or replace the defective product or its part" does not include removal or reinstallation labor, costs, or expenses that include, but are not limited to, labor costs or expenses. Cobra is not responsible for lost shipments.

FCC Declaration

FCC Section 15.19 Warning Statement
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.

FCC Section 15.21 Warning Statement
NOTE: THE LICENSEE IS NOT RESPONSIBLE FOR ANY CHANGES OR MODIFICATIONS NOT EXPRESSLY APPROVED BY THE PARTY RESPONSIBLE FOR COMPLIANCE. SUCH MODIFICATIONS MAY VOID THE USER'S AUTHORITY TO OPERATE THE EQUIPMENT.

FCC Section 15.105 Warning Statement
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and the receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

IC CNR-GEN, Section 8.4
ENGLISH: This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.
FRANÇAIS: Cet appareil est conforme aux normes CNR exemptes de licence d'Industrie Canada. Le fonctionnement est soumis aux deux conditions suivantes: (1) cet appareil ne doit pas causer d'interférences, et (2) cet appareil doit accepter toute interférence, y compris celles pouvant entraîner un fonctionnement indésirable de l'appareil.

FCC Declaration (Continued)

IC CNR-GEN, Section 8.3
ENGLISH: This radio transmitter (identify the device by certification number, or model number if Category II) has been approved by Industry Canada to operate with the antenna types listed below with the maximum permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this device. Immediately following the above notice, the manufacturer shall provide a list of all antenna types approved for use with the transmitter, indicating the maximum permissible antenna gain (in dBi) and required impedance for each.
FRANÇAIS : Cet émetteur radio (identifiez l'appareil par numéro de certification, ou numéro de modèle si la catégorie II) a été approuvé par Industrie Canada pour fonctionner avec les types d'antennes énumérés ci-dessous avec le gain maximal admissible et l'impédance d'antenne requise pour chaque type d'antenne indiqué. Les types d'antennes non inclus dans cette liste, ayant un gain supérieur au gain maximal indiqué pour ce type, sont strictement interdits pour une utilisation avec ce dispositif. Immédiatement après l'avis ci-dessus, le fabricant doit fournir une liste de tous les types d'antennes approuvés pour utilisation avec l'émetteur, indiquant le gain d'antenne maximal admissible (en dBi) et l'impédance requise pour chacun d'eux.

IC CNR-GEN, Section 8.3 (RF Exposure)
ENGLISH: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 40cm between the radiator & your body. The device is in compliance with RF exposure guidelines, users can obtain Canadian information on RF exposure and compliance. The minimum distance from body to use the device is 40cm.
FRANÇAIS : Cet équipement est conforme aux limites d'exposition aux rayonnements de la FCC établies pour un environnement non contrôlé. Cet équipement doit être installé et utilisé avec une distance minimale de 40 cm entre le radiateur et votre corps. L'appareil est conforme aux lignes directrices sur l'exposition aux RF, les utilisateurs peuvent obtenir des renseignements canadiens sur l'exposition aux RF et la conformité. La distance minimale du corps pour utiliser l'appareil est de 40 cm.

Need Help?

If you have questions about using or installing your new Cobra product, CONTACT COBRA FIRST... do not return this product to the store. Cobra contact information varies by country where the product was purchased and used. For the most current contact information, please visit the website www.cobra.com/support.

For products purchased in the United States, call 1 800 543-1608.

For problems with this product or for more information on its features, please visit www.cobra.com for help and to consult frequently asked questions, compliance statements, and complete manuals.

For products purchased outside the U.S. or Canada
Please contact your local dealer for product repair information.

Replacement Parts and Accessories

For replacement parts and accessories, visit www.cobra.com. Have questions or need help? Please call Cobra customer service at 1 800 543-1608.

PART/MODEL NO.	DESCRIPTION
251-353-9-001	CB MOUNTING BRACKET
741-001	MICROPHONE SUPPORT
426-002-N-001	122 cm (48 in) 12 V POWER CORD
634-081-9-001	WING SCREWS FOR MOUNTING BRACKET
29LXMIC	4-PIN REPLACEMENT MICROPHONE FOR 29 LX AM/FM RADIO
HG M75	HIGH-END 4-PIN POWER MICROPHONE
HG M73	HIGH-END 4-PIN REPLACEMENT DYNAMIC MICROPHONE
HG M77	4-PIN REPLACEMENT NOISE-CANCELING MICROPHONE
HG S500	DYNAMIC EXTERNAL SPEAKER WITH NOISE FILTER AND RESPONSE FUNCTION
HG S300	DYNAMIC EXTERNAL SPEAKER WITH NOISE FILTER
HG S100	DYNAMIC EXTERNAL SPEAKER

Product Information

For more information or to order any of our products, please visit our website: www.cobra.com

©2025 Cobra Electronics Corporation

Cobra®, Dynamike®, Nothing Comes Close to a Cobra® and the serpent design are registered trademarks of Cobra Electronics Corporation, USA. Cobra Electronics Corporation™ is a trademark of Cobra Electronics Corporation, USA.

Patent: www.cobra.com/patent