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DEDICATION
This project is dedicated to Almighty God for his protection, kindness, strength over my life throughout the period and also to my --- for his financial support and moral care towards me.Also to my mentor --- for her academic advice she often gives to me. May Almighty God shield them from the peril of this world and bless their entire endeavour Amen.
ACKNOWLEDGEMENT
The successful completion of this project work could not have been a reality without the encouragement of my --- and other people. My immensely appreciation goes to my humble and able supervisor mr. --- for his kindness in supervising this project.
My warmest gratitude goes to my parents for their moral, spiritual and financial support throughout my study in this institution.
My appreciation goes to some of my lecturers among whom are Mr. ---, and Dr. ---. I also recognize the support of some of the staff of --- among whom are: The General Manager, Deputy General manager, the internal Auditor Mr. --- and the ---. Finally, my appreciation goes to my elder sister ---, my lovely friends mercy ---, ---, --- and many others who were quite helpful.
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This work is on a building a simple valve tester using discrete components such as transistors and diodes. The main aim of having tube tester on hand is to make sure that all valves are working properly. The tester was built with a 30V 2A transformer. It drives a 4X or 6X voltage multiplier via a "HI/LO" switch to generate 90, 125, 180 and 250 volts for supplying the test voltages for the valve under test. The HI/LO switch feeds the voltage multiplier from either the full 30V from the transformer or from the 15V tap to halve the output voltages.
TABLE OF CONTENTS
COVER PAGE
TITLE PAGE
APPROVAL PAGE
DEDICATION
ACKNOWLEDGEMENT
ABSTRACT
CHAPTER ONE
- INTRODUCTION
- BACKGROUND OF THE PROJECT
- AIM AND OBJECTIVE OF THE PROJECT
- SIGNIFICANCE OF THE PROJECT
- APPLICATION OF THE PROJECT
- SCOPE OF THE PROJECT
- PROJECT ORGANISATION
CHAPTER TWO
LITERATURE REVIEW
- OVERVIEW OF TUBE TESTERS
- TYPES OF VALVE TESTER
- REVIEW OF VACUUM TUBE
- CLASSIFICATIONS OF VACUUM TUBES
- FAILURE MODES OF VACUUM TUBE
CHAPTER THREE
METHODOLOGY
- SYSTEM BLOCK DIAGRAM
- SYSTEM DESCRIPTION
- CIRCUIT DIAGRAM
- CIRCUIT DESCRIPTION
- CIRCUIT PARTS
CHAPTER FOUR
4.0 TEST AND RESULT ANALYSIS
- CONSTRUCTION PROCEDURE AND TESTING ANALYSIS
- ASSEMBLING OF SECTIONS
- TESTING OF SYSTEM OPERATION
- RESULT
CHAPTER FIVE
- CONCLUSION
- RECOMMENDATION
- REFERENCES
CHAPTER ONE
1.0 INTRODUCTION
1.1 BACKGROUND OF THE STUDY
A vacuum tube which is also known as a valve or tube is defined as a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied.
The type known as a thermionic tube or thermionic valve utilizes thermionic emission of electrons from a hot cathode for fundamental electronic functions such as signal amplification and current rectification. Non-thermionic types such as a vacuum phototube, however, achieve electron emission through the photoelectric effect, and are used for such purposes as the detection of light intensities. In both types, the electrons are accelerated from the cathode to the anode by the electric field in the tube.
A tube tester is an electronic instrument designed to test certain characteristics of vacuum tubes (thermionic valves). Tube testers evolved along with the vacuum tube to satisfy the demands of the time, and their evolution ended with the tube era. The first tube testers were simple units designed for specific tubes to be used in the battlefields of World War I by radio operators, so they could easily test the tubes of their communication equipment.
1.2 AIM AND OBJECTIVES OF THE STUDY
A valve tester is nothing more than a set of adjustable calibrated power supplies, a meter to measure to current and a set of sockets into which the valve under test can be inserted which is the main aim of the study. The objectives of the study are:
- To build the system prototype
- To provide emission readings at the recommended data book operating conditions
- Provide mutual conductance readings, directly or indirectly
- Test valves for internal shorts
The scope of this study covers building a simple valve tester using discrete components such as transistors and diodes. the tester is quite straightforward with a 30V 2A transformer. It drives a 4X or 6X voltage multiplier via a "HI/LO" switch to generate 90, 125, 180 and 250 volts for supplying the test voltages for the valve under test. The HI/LO switch feeds the voltage multiplier from either the full 30V from the transformer or from the 15V tap to halve the output voltages.
1.4 SIGNIFICANCE OF THE STUDY
This study shall provide a means of understanding how valve works and also how their test can be carried out on different types of valves. To the student involve, this study will provide a technological knowledge on how a simple valve tester can be built.
1.5 APPLICATION OF THE STUDY
This device can be used:
- In electronics laboratory
- By electronics hobbyist
The work is organized as follows: chapter one discuses the introductory part of the work, chapter two presents the literature review of the study, chapter three describes the methods applied, chapter four discusses the results of the work, chapter five summarizes the research outcomes and the recommendations.
CHAPTER TWO: The chapter one of this work has been displayed above. The complete chapter two of "design and implementation of valve tester" is also available. Order full work to download. Chapter two of "design and implementation of valve tester" consists of the literature review. In this chapter all the related works on "design and implementation of valve tester" were reviewed.
CHAPTER THREE: The complete chapter three of "design and implementation of valve tester" is available. Order full work to download. Chapter three of "design and implementation of valve tester" consists of the methodology. In this chapter all the method used in carrying out this work was discussed.
CHAPTER FOUR: The complete chapter four of "design and implementation of valve tester" is available. Order full work to download. Chapter four of "design and implementation of valve tester" consists of all the test conducted during the work and the result gotten after the whole work
CHAPTER FIVE: The complete chapter five of "design and implementation of valve tester" is available. Order full work to download. Chapter five of "design and implementation of valve tester" consist of conclusion, recommendation and references.
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