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Cobra 148 GTL ST User Manual

Cobra 148 GTL ST
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PRINTED IN THAILAND ©COBRA ELECTRONICS CORPORATION 1997 480-241-P-001
Cobra Electronics Corporation
6500 W. Cortland Street
Chicago, IL 60707
OPERATING INSTRUCTIONS FOR YOUR
40 CHANNEL
CITIZENS BAND
SSB/AM 2-WAY
MOBILE RADIO
Model 148 GTL ST
148.GTL.ST.MANUAL 10/1/98 10:56 AM Page 1
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Cobra 148 GTL ST Specifications

General IconGeneral
TypeMobile CB Radio
Channels40
Weight4.5 lbs
SpeakerBuilt-in
Microphone Connector4-pin
Antenna Impedance50 Ohms
Power Supply13.8V DC
Frequency Range26.965 MHz - 27.405 MHz
ModesAM, SSB
RF Output Power4 Watts (AM), 12 Watts (SSB)
MicrophoneDynamic Microphone

Summary

Introduction to CB Radio and SoundTracker

The CB Story

Overview of the Citizens Band radio service and its history.

SoundTracker Technology Introduction

Introduction to Cobra's SoundTracker system for signal enhancement.

Cobra 148 GTL ST: Technical Specifications

Introduction and Frequency Range

Overview of the radio's capabilities and frequency range.

General and Transmitter Specifications

Details on general radio parameters and transmitter performance.

Receiver and PA System Specifications

In-depth specifications for receiver sensitivity, selectivity, and PA system.

Physical Dimensions and Internal Components

Information on the radio's size, weight, and internal circuitry.

Installation Guide for Cobra 148 GTL ST

Vehicle Mounting and Connection

Guidance on choosing a location and connecting the transceiver.

Antenna Installation and Tuning

Steps to tune antennas with adjustable screws or cut-to-length.

Operating the Cobra 148 GTL ST

External Speaker and Public Address Setup

How to connect external speakers and use the Public Address feature.

Front Panel Controls Overview

Explanation of controls like Volume, Squelch, and RF Gain.

Detailed Operation Controls

Using SWR Cal, Dynamike, Voicelock, and Dimmer controls.

Channel Selection and Noise Limiting

Using Channel Selector, ANL/NB, and mode switches.

Receiving and Transmitting Procedures

Step-by-step guide for receiving signals and transmitting.

Receiving SSB Signals Guide

Guidance on tuning and understanding SSB transmissions.

Microphone and SoundTracker System

SSB Signal Translation and Tuning

How to correctly translate and tune SSB signals.

Alternate Microphone Installation and Wiring

Instructions for installing and wiring alternative microphones.

SoundTracker System Operation

Explanation of how SoundTracker improves reception and transmission.

Maintenance and Appendix

Maintenance and Adjustment Notes

Guidance on maintaining the transceiver and troubleshooting.

Activating and Testing SoundTracker

Steps to activate and test the SoundTracker feature for noise reduction.

CB Radio 10-Codes

List of common 10-codes used in CB radio communications.

Essential CB Operation Rules

Key rules that should be obeyed during CB radio use.

Using Channel 9 for Emergency Messages

Guidelines for permitted and prohibited communications on Channel 9.

Service and Warranty Information

How to Obtain Service

Instructions for sending the unit for warranty or repair service.

Limited Two-Year Warranty Details

Information on the product's limited warranty coverage and exclusions.

Cobra CB Radio Accessories

Available Accessories and Ordering

List of accessories with part numbers, costs, and ordering information.

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