This is a design of circuit that is very rugged and reasonably power amplifier circuit that can be used for any audio applications. The circuit is designed such that most of the components are not critical and can be easily replaced by nearest values. This is makes it ideal to assemble from your electronics junk box. This is the figure of the circuit for the amplifier;
The operation of the amplifier is the amplifier produces 60W rms at 50V supply on a 8 Ohm load. The capacitor C1 controls low frequencies and capacitor C2 controls high frequencies. The circuit is basically a class B amplifier. The transistors 2N 3055 serves the function of driving the speaker. The other transistor functions as pre amplifiers for the driver stage. This is the basic scheme of the circuit. The maximum power level of amplifier can be set by adjusting the 500 Ohm POT connected with the BC107 transistor.
The are some notes for this circuit. The circuit can be powered using a 50 V DC power supply with 5A current rating. It is up to 60 V can be given to the circuit. Any way the power supply must be well regulated and filters to avoid noise. The amplifier is adjusts the 500 ohm POT to obtain optimum performance. Volume control can be attained by connecting a 10 K POT in series to the input of the amplifier.
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