Cobra 29 Citizens Band Solid State 2-Way Radio

Instruction Manual

A Product of DYNASCAN CORPORATION

1801 WEST BELLE PLAINE AVENUE, CHICAGO, ILLINOIS 60613

Front view of the Cobra 29 CB radio with microphone.

Specifications

General

Channels: 23
Frequency Range: 26.965 to 27.255 MHz
Frequency Control: Crystal synthesizer
Frequency Tolerance: 0.005%
Operating Temperature Range: -20°C to +50°C
Microphone: Plug-in type; dynamic
Input Voltage: 13.8 VDC nom. (Positive or negative ground)
Current Drain: Transmit: AM full mod., 1.5A; Receive: Squelched, 0.3A; full audio output 1.2 A
Size: 8 1/2"L. x 6-7/8"W. x 2¼"H.
Weight: 5 1/2 pounds.
Antenna Connector: UHF, S0239
Semiconductors: 23 Transistors, 21 Diodes, 1 Integrated Circuit
Meter: Illuminated, indicates relative power output and received signal strength.

Transmitter

Power Input: 5 Watts
Modulation: High and low level Class B amplitude modulation
Modulation Capability: 100% - Adjustable with DYNAMIKE microphone gain control
Frequency Response: 300-2500 Hz
Output Impedance: 50 Ohms, unbalanced
Output Indicators: Meter shows relative RF output power, red lamp gives RF output indication, and green lamp shows modulation

Receiver

Sensitivity: Less than 1 μV for 10 dB (S+N)/N
Selectivity: 6 dB @ 4 kHz, 40 dB @ 20 kHz
Image Rejection: 30 dB
I.F. Frequencies: Double conversion, 1st: 11.275 MHz, 2nd: 455 kHz
Automatic Gain Control (AGC): Less than 10 dB change in audio output for inputs from 10 to 500,000 microvolts
RF Gain Control: Adjustable for optimum signal reception
Noise Blanker: RF type, with balanced diode gate
Delta Tune Range: ±1.5 kHz continuously adjustable
Squelch: Adjustable; threshold less than 1 μV
Audio Output Power: 2.5 Watts into 8 Ohms
Frequency Response: 300-3000 Hz
Distortion: Less than 10% @ 2.5 Watts @ 1000 Hz
Built-in Speaker: 8 Ohms, round
External Speaker: 8 Ohms; disables internal speaker when connected

PA System

Power Output: 3 Watts into external speaker
External Speaker for PA: 8 Ohms; when PA-CB switch is in PA, the PA speaker also monitors the receiver, separate jack provided

Introduction

The Cobra 29 has been designed to provide high level, trouble-free performance in the Citizens Radio Service. The service includes 23 channels with frequencies ranging from 26.965 to 27.255 MHz.

To ensure maximum performance, please read the following control descriptions and operating instructions carefully.

Note: These transceivers are designed for Class "D" operation in the 11-meter Citizens Radio Service and must comply with FCC regulations. Operators are required to understand Part 95 of the FCC regulations and obtain a license and call sign before operating.

Warning: Transmitter section adjustments must be performed by a qualified technician with a valid first or second class FCC radio telephone license.

Channel Frequencies
Channel	Frequency (MHz)	Channel	Frequency (MHz)
1	26.965	12	27.105
2	26.975	13	27.115
3	26.985	14	27.125
4	27.005	15	27.135
5	27.015	16	27.155
6	27.025	17	27.165
7	27.035	18	27.175
8	27.055	19	27.185
9	27.065	20	27.205
10	27.075	21	27.215
11	27.085	22	27.225
		23	27.255

Section I: Installation

Location

Choose a convenient location for the transceiver and microphone bracket, ensuring it does not interfere with vehicle operation. For automobiles, mounting under the dash is common.

Mounting and Connection

The Cobra 29 includes a universal mounting bracket. Secure the transceiver in the bracket with the provided bolts, allowing for angle adjustment. The bracket must be mounted securely and provide a good electrical connection to the vehicle's chassis.

Determine the mounting location. Use the bracket as a template to mark bolt hole positions. Ensure no obstructions exist before drilling.
Connect the antenna cable plug to the standard UHF (SO-239) receptacle on the rear panel.
Connect the DC power input wire (with fuse) to a +12 V DC source. For vehicles, this is typically the accessory contact on the ignition switch to prevent accidental battery drain.
Connect the black wire to -12 V DC (vehicle chassis). Ensure good electrical contact by removing any paint from the connection point.
Mount the microphone bracket within easy reach of the transceiver.

Note on Positive Ground Vehicles: In positive ground systems, connect the red wire to the chassis and the black wire to the ignition switch.

Ignition Noise Interference

Electrical noise from the vehicle's ignition and generator can interfere with reception, especially at low signal levels. While the Cobra 29 has noise blanking and limiting features, severe interference may require professional assistance to locate and correct the source.

Antenna

A properly matched antenna system is crucial for maximizing transmission distance. For mobile installations, a non-directional, vertically polarized quarter-wavelength whip antenna is recommended for reliable operation and range. Shorter loaded whips offer a more compact option for shorter distances.

Mobile whip antennas utilize the vehicle's metal body as a ground plane. A standard antenna connector (Type SO-239) is provided on the transceiver.

For installations not on a metal surface, a separate ground wire to a good metal electrical ground is necessary. For boats, a ground plate or a steel hull is required for efficient operation. Consult a dealer for proper grounding systems and electrolysis prevention.

Base Station Operation

For home or office use (110-120V AC), a separate power supply rated at 2 amps and 13.8 volts DC is required. Connect the transceiver's red (+) and black (-) leads to the corresponding terminals of the AC power supply.

Note: Do not connect the transceiver directly to 110V AC. Any standard Citizens Band antenna (beam, dipole, ground plane, or vertical) can be used for base station operation. A ground plane vertical antenna offers the most uniform horizontal coverage.

Remote Speaker

The external speaker jack (EXT. SPKR) on the rear panel allows for remote receiver monitoring. The external speaker should have 8 Ohms impedance and be rated for at least 3 watts. Connecting an external speaker automatically disconnects the internal speaker.

Public Address (PA)

To use the PA system, connect an external 8 Ohm, 3 watt speaker to the PA SPKR. jack on the rear panel. Position the speaker away from the microphone to prevent acoustic feedback, especially at high volume levels.

Section II: Operation

Controls and Indicators

The Cobra 29 features nine controls and three indicators on the front panel.

Front panel layout of the Cobra 29, showing controls and indicators.

A. Control Functions

DYNAMIKE: Adjusts modulation level during transmit. Functions as volume control in PA mode.
OFF/ON/VOLUME: Turns the unit on and sets the listening volume. Turn clockwise to power on.
SQUELCH: Eliminates receiver background noise. Adjust clockwise until noise disappears, then slightly further if needed. Avoid over-adjusting, which can block weak signals.
RF GAIN: Optimizes signal reception, especially in strong signal areas. Reduce gain by turning counterclockwise.
DELTA-TUNE: Fine-tunes received signals for clarity or to reduce adjacent channel interference. Adjust for the clearest audio or lowest interference.
CHANNEL SELECTOR: Selects one of the 23 available CB channels. Channel 9 is reserved for emergency communications.
ANL SWITCH: Activates the Automatic Noise Limiter in the audio circuits.
NB SWITCH: Activates the RF Noise Blanker, effective against repetitive impulse noise like ignition interference.
PA-CB SWITCH: Selects between Public Address (PA) and Citizens Band (CB) modes. The PA function requires an external speaker.

B. Indicators

PWR/S METER: Displays relative transmitter power during transmit and input signal strength during receive. Illuminated when power is on.
MOD LIGHT: A green light that flashes with modulation during transmit, indicating the modulation level.
TX LIGHT: A red light that activates when the transmitter is keyed, indicating RF output.

C. Press-to-Talk Microphone

The included low-impedance dynamic microphone controls the receiver and transmitter via the press-to-talk switch. Hold the microphone about two inches from your mouth and speak clearly in a normal voice when transmitting. The microphone connector is on the left side of the unit.

D. Operating Procedure to Receive

Set the PA-CB switch to the CB position and turn the RF GAIN control fully clockwise.
Turn the unit ON by rotating the VOLUME control clockwise until it clicks.
Set the VOLUME for a comfortable listening level.
Adjust the SQUELCH control clockwise until background noise just disappears.
Select the desired channel using the CHANNEL SELECTOR.

E. Operating Procedure to Transmit

Select the desired channel.
If the channel is clear, press the push-to-talk switch on the microphone and speak clearly. The TX light will indicate output power.

F. Accessory Circuit Operation

ANL: Slide the ANL switch to the ANL position to activate noise reduction.
NB: For ignition noise, slide the NB switch to the NB position to activate the noise blanker.
RF GAIN: In strong signal areas, reduce RF gain by turning the control counterclockwise to improve reception quality. SQUELCH may need readjustment.
PUBLIC ADDRESS (PA) OPERATION: Connect an 8 Ohm, 3 watt speaker to the PA SPKR. jack. Ensure physical separation between the microphone and speaker to prevent acoustic feedback.

Section III: Maintenance and Adjustment

The transceiver is designed for reliability in mobile environments. Use only identical parts for replacements. Refer to the schematic and parts list.

Warning: FCC regulations prohibit unauthorized adjustments of the radio frequency section by operators. Only licensed technicians may tune the transmitter.

Adjustment

The transceiver is factory aligned. For optimum power transfer with a 50 Ohm antenna, adjustments to the transmitter output circuit may be necessary. These adjustments should only be performed by qualified personnel using an appropriate RF wattmeter.

Note: If performance issues persist after reviewing operating instructions, contact a qualified service technician or refer to the warranty service instructions.

Parts List for Cobra 29

Transistors, Diodes

CIRCUIT SYMBOL	DESCRIPTION	DYNASCAN PART NO.
TR-1,2	Transistor 2SC394 (Y)	176-042-9-001
TR-3,4,5,6,7,8,9	Transistor 2SC372 (0)	176-042-9-002
TR-17,21	Transistor 2SC373	176-025-9-001
TR-11,12	Transistor 2SC372 (Y)	176-042-9-003
TR-13,23	Transistor 2SC733 (Y)	176-042-9-004
TR-14,15	Transistor 2SC1096 (Y)	176-042-9-006
TR-18	Transistor 2SC735 (0)	176-042-9-005
TR-19	Transistor 2SC1226A (P)	172-014-9-002
TR-20	Transistor 2SC756-2-4	177-006-9-001
TR-22	Transistor 2SC495 (Y)	307-007-9-002
IC	Integrated Circuit TA7061 AP	151-040-9-002
D-1,3,4,9,15,21	Diode WG713	150-001-9-005
D-13,15	Diode CD-37	151-040-9-002
D-5,10,11,12,18,19,24	Diode 1N-60	150-001-9-005
D-6,7	Diode 1N60P	151-040-9-003
D-16,20	Diode SR1K-1	152-051-9-001
D-8	Diode 1S2688E (Variable)	152-051-9-001
D-17	Zener Diode CZ-092	152-051-9-001
D-14	Varistor MV-1

Coils, Transformers

CIRCUIT SYMBOL	DESCRIPTION	DYNASCAN PART NO.
L-1	Coil TC-71096 14 MHz Trap (LD-018)	041-056-9-001
L-2,6,9,14	Micro Inductor LF4-2R2K	041-061-9-001
L-3	Micro Inductor LF4-6R8K	041-061-9-002
L-4	Coil TC-71095 Power RF Choke (LD-017)	042-011-9-001
L-5	Coil 115C Line Filter Choke (TF-017)	044-028-9-006
L-7	Coil TC-71026 TX Pre-Driver (LC-020)	044-028-9-005
L-8	Coil TC-71023 TX Driver (LC-017)	044-028-9-004
L-10	Coil TC-71029 TX Final (LD-012)	044-028-9-003
L-11	Coil TC-71025 TX Matching (LC-019)	044-028-9-002
L-12	Coil NS-1344 Antenna Filter (LE-006)	044-028-9-001
L-13	Coil TC-71024 TVI Trap C (LC-018)	041-056-9-003
T-1	Coil TKXN-22160BU RX Antenna (LA-029)	066-017-9-001
T-2	Coil TKXC-22534BU RX RF Amp (LA-041)	066-017-9-002
T-3	Coil TKXC-23169F 23 MHz OSC (LA-046)	066-017-9-003
T-4,5	Coil TKXC-23170Z 38 MHz Filter (LA-047)	066-017-9-004
T-6	Coil TKXC-22535BM 38 MHz Filter (LA-042)	066-017-9-005
T-7	Coil TKAC-22536IE 1st IF (LA-043)	060-016-9-001
T-8	Coil TKAC-21165A 1st IF (LA-019)	060-016-9-002
T-9	Coil RLN-40479N 2nd IF (LA-078)	060-017-9-001
T-10	Coil RLN-40480N 2nd IF (LA-079)	060-017-9-002
T-11	Coil YMC-20845AC 2nd IF (LA-039)	060-016-9-004
T-12	Coil YMC-20846AC 2nd IF (LA-040)	060-016-9-005
T-13	Trans. 69 M AF Input (TF-011)	061-022-9-001
T-14	Trans. N28-7518BM AF Output (TF-038)	061-022-9-002
T-15,16	Coil KXN-13638HM TX 27 MHz Filter (LA-009)	066-017-9-006
T-17	Coil KXN-13636BM TX 27 MHz Filter (LA-008)	066-017-9-007
T-18	Trans. 14299A RF (LA-077)	066-018-9-001
T-19	Trans. 20979A RF Amo. (LA-060)	066-018-9-002

Crystals

CIRCUIT SYMBOL	DESCRIPTION	DYNASCAN PART NO.
X-1	Crystal 23290 MHz HC-25/U	133-004-9-001
X-2	Crystal 23340 MHz HC-25/U	133-004-9-002
X-3	Crystal 23390 MHz HC-25/U	133-004-9-003
X-4	Crystal 23440 MHz HC-25/U	133-004-9-004
X-5	Crystal 23490 MHz HC-25/U	133-004-9-005
X-6	Crystal 23540 MHz HC-25/U	133-004-9-006
X-7	Crystal 14950 MHz HC-25/U	133-004-9-007
X-8	Crystal 14960 MHz HC-25/U	133-004-9-008
X-9	Crystal 14970 MHz HC-25/U	133-004-9-009
X-10	Crystal 14990 MHz HC-25/U	133-004-9-010
X-11	Crystal 11275 MHz HC-25/U	133-004-9-011
X-12	Crystal 11730 MHz HC-25/U	133-004-9-012

Resistors, Controls

CIRCUIT SYMBOL	DESCRIPTION	DYNASCAN PART NO.
VR-1,5	Variable Resistor 50 K (B)	008-187-9-003
VR-3	Variable Resistor 20 K (B)	008-158-9-006
VR-7	Variable Resistor 10K (A) w/Switch	008-187-9-001
VR-12	Variable Resistor 10 K (A)	008-187-9-002
VR-2	Semi-fixed Resistor 50 K 3P 6BM	008-205-9-001
VR-4	Semi-fixed Resistor 50 K2P 6BM	008-187-9-004
VR-6	Semi-fixed Resistor 30 K 2P 6BM	008-187-9-005
VR-9,10	Semi-fixed Resistor 20 K 2P 6BM	008-187-9-006
R-81	Carbon 47 ohm ½W ELR
R-4,86,94,14	Carbon 56 ohm ¼W ELR	002-104-5-560
R-68,84,31	Carbon 68 ohm ¼W ELR	002-104-5-680
R-12,18,21,65,78	Carbon 100 ohm ¼W ELR	002-104-5-101
R-9,24,66	Carbon 150 ohm ¼W ELR	002-104-5-151
R-6,17,32,74,77,97	Carbon 220 ohm ¼W ELR	002-104-5-221
R-3,85	Carbon 330 ohm ¼W ELR	002-104-5-331
R-60	Carbon 470 ohm ¼W ELR
R-37,40	Carbon 680 ohm ¼W ELR	002-104-5-681
R-8,13,23,34,54,67	Carbon 1K ohm ¼W ELR	002-104-5-102
R-56	Carbon 1.5K ohm ¼W ELR	002-104-5-152
R-2	Carbon 2.2K ohm ¼W ELR	002-104-5-222
R-35,98	Carbon 2.7K ohm ¼W ELR
R-1,83,99	Carbon 3.3K ohm ¼W ELR
R-50,53	Carbon 3.9K ohm ¼W ELR	002-104-5-392
R-51,55,57	Carbon 4.7K ¼W ELR ohm	002-104-5-472
R-17,11,16,38,61,62,76,93	Carbon 5.6K ohm ¼W ELR	002-104-5-562
R-41	Carbon 6.8K ohm ¼W ELR	002-104-5-682
R-5,19,80,88,89	Carbon 10K ohm ¼W ELR	002-104-5-103
R-15,75	Carbon 15K ohm ¼W ELR	002-104-5-153
R-42,52,58,64,82	Carbon 22K ohm ¼W ELR	002-104-5-223
R-36	Carbon 27K ohm ¼W ELR	002-104-5-273
R-10,44,39	Carbon 33K ¼W ELR	002-104-5-333
R-43,29	Carbon 39K ¼W ELR	002-104-5-393
R-20,79,49	Carbon 47K ¼W ELR	002-104-5-473
R-25,90	Carbon 82K ohm ¼W ELR
R-30,45,46,48	Carbon 100K ¼W ELR	002-104-5-104
R-63	Carbon 220K ohm ¼W ELR	002-104-5-224
R-26,28,47	Carbon 470K ohm ¼W ELR	002-104-5-474
R-91	Carbon 820 ohm ¼W ELR
R-59	Carbon 220 ohm ¼W R
R-92	Carbon 120 ohm ¼W ELR
R-73	Carbon 1K ¼W R
R-22	Carbon 6.8K ¼W R
R-72	Solid 56 ohm ¼W
R-33	Solid 220 ohm ¼W
R-87	Solid 1K ohm ¼W	001-102-6-101
R-70	Solid 47 ohm 1/8W	044-123-9-001
R-69	Metalized 0.5 ohm ½W	004-138-9-001
R-71	Metalized 12 ohm 2W

Capacitors

CIRCUIT SYMBOL	DESCRIPTION	DYNASCAN PART NO.
C-12	Ceramic 1 pF 50 V	020-109-9-001
C-22,24,78	Ceramic 2pF 50 V	020-109-9-007
C-5,25,38,84	Ceramic 3pF 50 V	020-109-9-003
C-15,87,109	Ceramic 5pF 50 V	020-109-9-010
C-35,136	Ceramic 10 pF 50 V	020-109-9-012
C-83	Ceramic 25 pF 50 V	020-109-9-015
C-1,104	Ceramic 33pF 50 V	020-125-9-001
C-114, 200	Ceramic 40pF 50 V	020-125-9-002
C-21,82,90,110	Ceramic 47pF 50 V	020-109-9-011
C-34	Ceramic 90pF 50 V	020-125-9-003
C-14,33	Ceramic 91pF 50 V	020-125-9-003
C-43,85,91,101	Ceramic 100pF 50 V	020-109-9-008
C-9,88,94	Ceramic 150pF 50 V	020-109-9-004
C-18,80,108	Ceramic 220pF 50 V	020-109-9-013
C-102	Ceramic 250pF 50 V	020-125-9-005
C-17,79,121,122	Ceramic 470pF 50 V	020-109-9-014
C-2	Ceramic 0.001 μF 50 V	020-125-9-006
C-132	Ceramic 8pF 50 V	020-125-9-007
C-45	Ceramic 0.002 μF 50 V	020-125-9-007
C-31,32,52,60,70,118	Ceramic 0.005 μF 50 V	020-109-9-009
C-77	Ceramic 0.1μF 50 V	020-109-9-016
C-3,4,6,7,10,13,19,20,23,36,44,59,73,75,76,81,86,89,92,93,103,106,134,137,140	Ceramic 0.01 F 50 V	020-109-9-002
C-11,29,39,93,96,98,99,100,105,107,112	Ceramic 0.04 F 50 V	020-109-9-005
C-135	Ceramic 0.0047 μF 50 V	020-125-9-008
C-28,30	Ceramic 0.001 μF 50 V - 16 V	022-120-9-001
C-138	Electrolytic 2.2μF 25V
C-47,48,49,51,129,130	Electrolytic 1μF 16V	022-099-9-003
C-46,50,54,56	Electrolytic 10μF 10V	022-099-9-002
C-42	Electrolytic 47μF 10V	022-120-9-002
C-119	Electrolytic 47μF 16V	022-120-9-003
C-53,63,58	Electrolytic 100μF +100-10%. 10V	022-099-9-004
C-64	Electrolytic 100μF 16V	022-120-9-004
C-74	Electrolytic 470μF 16V	022-099-9-006
C-57	Mylar 0.0022 μF 50V	025-087-9-001
C-8,26,27,40	Mylar 0.01μF 50V	025-087-9-002
C-120,65,66	Mylar 0.02μF 50V	025-074-9-001
C-37,41	Mylar 0.1μF 50V	025-074-9-002
C-55,61,58	Mylar 0.47μF 50V	025-074-9-002
C-71,72

Switches

CIRCUIT SYMBOL	DESCRIPTION	DYNASCAN PART NO.
S-4,5	Slide Switch SL-2-2-2-14	084-031-9-001
S-2	Rotary Switch 1-2-24 (4S32C000-A)	083-143-9-001
S-3	Slide Switch SL-3-3-2-03

Miscellaneous

CIRCUIT SYMBOL	DESCRIPTION	DYNASCAN PART NO.
Crystal Socket	S-D0105	749-709-9-001
M-R type	Antenna Connector	772-025-9-001
Microphone Plug	SM-144 (4-P)	775-022-9-001
Microphone Jack	SM-144 (4-P)	773-045-9-001
Speaker	10P03S 8 ohm 2-W	580-013-9-001
M-	Meter type A-39 S31EA563	320-051-9-001
MIKE	Microphone 22-115-45	562-006-9-001
	Microphone Hanger 12-42438-01	741-074-9-001
	Fuse Holder RF-104	742-018-9-001
	Fuse 1.5 Amp	191-002-9-001
Cord Stopper	BU-3270	380-205-9-001
TP-3,4	Check Terminal T-41	757-011-9-001
TP-3,4	Check Terminal N-60	757-011-9-002
TR-1,2,5	Pin Terminal 1.5 mm	757-014-9-001
J-3,4	Jack SJ-296 3.5mm	773-045-9-002
PL-1	Pilot Lamp 14V/50mA (red)	400-032-9-001
PL-2	Pilot Lamp 14V/50mA (white)	400-032-9-002
PL-3	Pilot Lamp 14V/50mA (clear)	400-032-9-003
PL-4	Pilot Lamp 4.6V/30mA (clear)	400-032-9-004
CF	Ceramic Filter LF-B6	140-009-9-001
	Metal Chassis M2-02286	257-056-9-001
	Metal Cabinet (top) M2-02287	253-033-9-001
	Metal Cabinet (bottom) M2-02288	252-012-9-001
	Mounting Bracket M3-02289	250-044-9-001
	Heat Sink (aluminum) M4-00844 (Audio)	747-026-9-001
	Heat Sink (aluminum) M4-00344 (Transmitter)	747-026-9-002
	Front Panel (ABS) M2-02285	255-113-9-001
	Channel Knob (ABS) M4-01727	751-095-9-001
	Volume Knob (ABS) M4-01958	751-106-9-002
	Channel Dial (acryl) M4-01957	380-176-9-002
	Lamp Grille (acryl) M4-01308 red	750-007-9-002
	Lamp Grille (acryl) M4-01497 green	750-007-9-001
	Screw for Bracket M4-00238	634-044-9-001
	Front Plate M4-02290	260-044-9-001
	Microphone Plate M4-01960	600-018-9-001
	FCC Plate	600-018-9-002
	Lighting Board M4-00840	769-073-9-001
	Lamp Holder (rubber) M4-00601	381-055-9-001
	Instruction Booklet	480-140-9-001
	Schematic & Parts List (Composite)	499-057-9-001
	FCC Application Form	492-041-9-001
	Styrofoam Box	503-069-9-001
	Display Box	500-226-9-001
	P.C. Board	302-151-9-001

Circuit Diagram for Cobra 29.

Warranty Service Instructions

Refer to the instruction manual for applicable adjustments.
Check common electrical parts. Ensure manual adjustments are made after replacement.
Defective parts within the warranty period should be returned to the factory, prepaid, with product model, serial number, and purchase date. These parts will be exchanged at no charge.
If issues persist, securely pack the product with a detailed list of troubles, your name, and address. Forward prepaid to the nearest authorized Dynascan communication service agency.

Contact your local Dynascan Distributor for service agency information or write to:

Service Department
DYNASCAN CORPORATION
2815 W. Irving Park Rd.
Chicago, Illinois 60618

Limited 90-Day Warranty

DYNASCAN warrants products against defects in material and workmanship for ninety (90) days from the purchase date. DYNASCAN will, at its option, repair or replace non-conforming products returned transportation prepaid to their factory or authorized service contractor. DYNASCAN is not liable for consequential damages. No other express warranties are made. Implied warranties, including merchantability, are limited to ninety (90) days. This warranty does not cover damage from alterations, misuse, negligence, accident, or improper installation/adjustment. The warranty is void if the serial number is altered or removed. Dynascan reserves the right to discontinue models or change specifications without notice. To register, complete and mail the warranty registration card within five (5) days of purchase to DYNASCAN, 1801 W. Belle Plaine Avenue, Chicago, Illinois 60613.

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	Cobra 29 LX Professional CB Radio User Manual User manual for the Cobra 29 LX Professional CB Radio, covering installation, operation, features, and specifications. Learn how to use your CB radio for communication, weather alerts, and emergency situations.
	Cobra 19 ULTRA II CB Radio User Manual This user manual provides comprehensive instructions for the Cobra 19 ULTRA II 40-channel Citizens Band (CB) 2-way mobile radio, covering its features, installation, operation, maintenance, and warranty information.