DESIGN AND CONSTRUCTION OF 60 WATTS POWER AMPLIFIER
Abstract
The amplifier device increases the amplitude of a signal waveform without changing other
parameters of the waveform, such as frequency and wave shape. Audio amplifier amplifies an
electrical signal that has a frequency range corresponding to the range of human hearing,
which is 20 Hz to 20 KHz. This work seeks to design and construct a 60-watt class AB audio
amplifier using a D718 power transistor. The design is in four stages, which are the power
supply unit, signal processor unit (input stage), power amplifier unit (amplification stage),
and output unit (output stage). The calculated power for this audio amplifier was 59.9 watts.
The gain of the amplifier is 9.62 dB, which shows that the amplifier has a low signal-to-noise
ratio; the results obtained show that the developed amplifier worked satisfactorily. An input
frequency of 70 Hz given to the amplifier by the frequency generator yields an output
frequency of 166.6 Hz. It implies that the output signal is twice the input signal, meaning that
there is amplification with the amplifier that the amplifier works is satisfactory. Self-designed
and self-constructed amplifiers are safer, and they can give the required output. Based on the
power level this is cheap, more reliable and more effective to use. The transistors emit less
heat when the power amplifier is powered ON; this is because the heat sink was reasonably
thick enough to handle the power dissipated by the transistors.
Full-Text Access Notice
In accordance with the NERD Policy on promoting peer-reviewed publication, public access to the full text of a project, thesis or dissertation is restricted for three years, allowing the author and supervisors sufficient time to pursue peer-reviewed publication.
During this period, researchers with legitimate academic or research purposes may request authorisation directly from the author to enable NERD to release the indexed full texts of the work using the form below.