The design and construction of mini radio broadcast transmitter and audio console using frequency modulation (fm) with power rating of 1 watt
Table Of Contents
- Title pageApproval pageDeclaration DedicationAcknowledgementAbstractTable of contentList of diagram/figuresIntroductionCHAPTER 1 TRANSMITTER FUNDAMENTALS AND TYPES OF MODULATION1.1 Transmitters fundamental1.2 Modulations (analog and digital)
- 1.3Amplitude modulation1.4 Frequency modulation1.5 Method of fm1.6 Modulation overview1.61 Basic reactance modulator1.62 Theory of reactance modulator
- 1.70Types of reactance modulator1.
- 7.1Varacto diode modulatorCHAPTER 2 AMPLIFIER EXPLANATIONS2.10 Amplifier explanations2.20 Class of amplifier2.21 Class of amplifier2.22 Class B amplifier
- 2.23Class AB amplifier2.24 Class c amplifier2.30 Oscillators2.31 Types of oscillators
Chapter THREE
SYSTEM DESIGN AND IMPLEMENTATION
- .0 TRANSMISSION LINE3.10 FUNDAMENTALS3.30 Types of transmission lines3.31 Rectangular wave guide3.32 Circular wave guide
- 3.33Ridge Wave guide3.34 Optical fiberCHAPTER 4 POWER SUPPLY4.1 Stages of power supply4.2 Audio console power supply4.3 Transmitter power supply designCHAPTER 5 AUDIO CONSOLE UNIT5.1 Audio console transducer5.2 Audio console pre-amp stage5.3 Audio console power amp stage5.4 Audio console control/mixer5.5 The operation of the audio consoleCHAPTER 6 TRANSMITTER AND ANTENNA DESIGN6.1 Oscillator stage design for transmitter6.2 Buffer/power amplifier design6.3 Tank circuit design6.4 Antenna design6.41 Types of antenna and application6.42 Antenna matching network6.43 Antenna designCHAPTER 7 COMPONENT DESCRIPTION AND CONSTRUCTION
- 7.10 LM 386-power amplifier7.11 Capacitor7.12 Transistor7.2 Specification7.3 Construction and soldering7.4 Precautions taken during soldering7.5 Troubleshooting7.6 Transmitter strip board7.7 Audio console strip boardRECOMMENDATIONCONCLUSIONREFERENCE:LIST OF FIGURES AND DIAGRAMFig
- 1.4 Information signalFig
- 1.62 Reactance modulator circuitFig
- 1.7 Reactance modulator elementsFig
- 1.7Diagram of transistor reactance modulatorFig
- 1.8Varactor diode modulatorFig
- 2.1 Amplifier configurationFig
- 2.21Class a wave form representationFig
- 2.22Voltage current characteristic of class b ampFig
- 2.3Block diagram of an oscillatorFig
- 3.2Balanced lineFig
- 3.22Unbalanced wire – lineFig
- 3.3 Method of wave propagation in a waveguideFig
- 3.31Te10 mode in a rectangular waveguideFig
- 3.32 Circular waveguideFig
- 3.33 Rectangular waveguide/ ridgeFig
- 3.4Optical fiber cableFig
- 4.1Power supply block diagramFig
- 4.2Audio console power supply regulatorFig
- 4.3Transmitter power supply Fig
- 5.2 Audio console pre-ampFig
- 5.3Audio console power ampFig
- 5.4Audio console control/ mixerFig
- 6.1Oscillator stageFig
- 6.2Buffer amp/power ampFig
- 6.3Tank circuitFig
- 6.42Antenna matching networkFig
- 7.1LM 386 (power amp)Fig
- 7.11CapacitorFig
- 7.12TransistorBill of quantity Block diagram of audio consoleBlock diagram of transmitterAudio console schematicTransmitter schematicTransmitter casing Audio console casing
Thesis Abstract
The early transmitter for radio broadcasting is so big and bulky that they do occupy numerous spaces. The circuitries are mainly designed with valves, which are big in sizes.
With the advent of semiconductor materials such as transistors electronic equipment are now becoming miniaturized such that small transmitters are now becoming handy and compact.
In line with this we choose to design a complete radio broadcasting equipment tat is compact and existence of semiconductor materials.
The system units are of two categories namely audio console for the processing and mixing of musicals is basically a condenser microphone.
The transmitter unit is where the center frequency is provided. All these were designed to be in compact and small manner. This project is aimed at serving a community using a small and compact radio broadcasting equipment with a power watt of 1 watt a community of 1 kilometer in radius should be covered comfortable and the audio production very clear unlike the common noisy FM microphone project.
Thesis Overview
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