Cobra 25 LTD User Manual

Cobra
®
, Nothing Comes Close to a Cobra
®
and the snake design are registered trademarks
of Cobra Electronics Corporation, USA. Cobra Electronics Corporation
™
is a trademark of
Cobra Electronics Corporation, USA.
Owner’s Manual
813-PK0639-001
© 2023 Cobra Electronics Corporation
For more information or to order any of our products, please visit our website: www.cobra.com
25 LTD AM/FM
Professional CB Radio
4W Power / 40 Channels
Thank you for purchasing the Cobra 25 LTD AM/FM CB Radio
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manual, we are here to help:
Service, Orders & Product Questions
For service, product questions and service hours call 800-543-1608 or go to www.cobra.com
For Assistance Outside the U.S.A.
Contact Your Local Dealer
Customer Support
Our Thanks, The CB Story,
and Customer Assistance
Citizens Band Radio History
Invented by Al Gross in 1945, the CB radio originally served as a method of communication for troops
during World War II. After the war, Gross worked to make two-way radios a way of communication
for personal use and the CB radio service was established by law in the U.S. in 1949. It wasn’t until
the 1970s that technology advanced and the CB market caught on as a method of communication
between drivers to report police speed traps and road hazards.
The Citizens Band Radio Service consists of 40 channel frequencies that are mostly 10 kHz apart.
Transmitter power is limited to 4 watts in the US, and range can vary depending on the terrain and
quality of the product.
Currently, the Citizens Band service does not require a license for operation, regardless of age, as
long as the rules of operation established by the Federal Communication Commission (FCC) are
followed.
Petition For FCC Part 65 Rule Changes
In 2016, Cobra petitioned the FCC to revise Part 95 rules to allow CB radios to use frequency
modulation (FM). Cobra contended that FM offers improved speech quality and lower noise
interference, which improves the standard of two-way radios and is a benefit to the customer.
Through the direct efforts of Cobra Electronics and the enthusiastic support from loyal customers and
the distribution network the FCC granted the request. In 2021, Part 95 officially was updated to
include FM as an option for two-way radio use.
Today, thanks to Cobra Electronics’ petitions to improve the quality of the Citizens Band Radio
Service, users can enjoy the benefits of CB radio communication in a range of industries.
A1

Cobra 25 LTD Specifications

General

Type	CB Radio
Channels	40
Modulation	AM
Power Output	4 Watts
Input Voltage	13.8 V DC
Frequency Range	26.965 MHz to 27.405 MHz

Summary

Introduction and Customer Assistance

Citizens Band Radio History

Background on CB radio's origins, evolution, and service standards.

FCC Part 65 Rule Changes

Cobra's role in enabling FM modulation for CB radios and its impact.

Customer Support and Contact

Information on obtaining help, product service, and contact details.

Product Features and FCC Regulations

Front Panel Controls Overview

Identification and explanation of all controls on the front panel.

Rear Panel Connections

Details of available ports for connecting accessories and power.

FCC Compliance Statement

Explains adherence to FCC rules for device operation.

Replacement Parts and Accessories

List of optional items and parts available for purchase.

Installation Guide

Location Selection

Advice on choosing a suitable and convenient mounting spot for the transceiver.

Mounting and Connection Steps

Detailed instructions for physically installing the unit and connecting power.

Antenna and Initial Operation

CB Antenna Selection and Mounting

Guidance on choosing the right antenna and recommended mounting locations.

Powering On and Basic Settings

Steps for turning on the radio and setting AM/FM modes and channels.

Core Operation Controls

Receiving Signals and S-Meter

How to listen to transmissions and interpret the signal strength meter.

Noise Filtering and Display Brightness

Using NB/OFF switch and adjusting the channel indicator brightness.

Adjusting RF Gain and Squelch

Optimizing reception by adjusting gain and setting the squelch threshold.

Transmitting Procedure

Steps for speaking into the microphone and transmitting.

Advanced Operation Features

Dynamike® Microphone Sensitivity

Adjusting the microphone sensitivity for optimal audio output level.

RF Output Meter Usage

Monitoring the radio's RF output level during transmission.

External Speaker and PA System

Connecting external speakers and using the Public Address feature.

Operation Modes and Usage

ANL Switch and Base/Mobile Operation

Using the Automatic Noise Limiter and setup for base or temporary mobile use.

CB Applications, Rules, and Emergencies

Benefits of CB, communication rules, and emergency procedures.

CB Communication Aids

Understanding CB 10-Codes

Common codes used for quick and efficient communication in noisy areas.

Technical Details

Frequency Ranges and Channels

List of frequencies for all 40 CB channels.

General and Transmitter Specifications

Key device parameters including power output and modulation type.

Receiver and PA System Specs

Details on receiver sensitivity, selectivity, and PA system output.

Warranty and Support

Limited 2-Year Warranty Details

Information on warranty coverage, exclusions, and general policy.

Getting Help and Product Support

How to contact Cobra for questions, service, and product support.

Regulatory Information

FCC and IC Compliance Statements

Statements regarding compliance with FCC and Industry Canada regulations.

RF Exposure Guidelines

Information and limits regarding radio frequency exposure.