Saturday 12 May 2018

Multi-use amplifier using discrete transistors – a simple project that a student in electronics can try


Used transistors: KSC340, TIP41C, TIP42C2N5551, BC558
Click on the schematic to magnify
All the components are easily available at most of the electronic spare part market.  The components are not costly too. When you select the mains transformer, go for a good quality one, which determines the quality of sound from the amplifier.  If you use a Torroidal type transformer, will be better.  Even though it will cost more, it will give good results.
Select a transformer having not less than 3Amps secondary current.
The power transistors should be fitted on suitable heat-sink to prevent overheating.  Use of heat-sink compound is highly recommended.
Keep all the inter-connection wires as short as possible.  Use a metal cabin to assemble this amplifier.
The amplifier can be used with multi signal inputs.  You can note it by its input board sockets.
It will be best to use a high-capacity main filter capacitor.  5000MFD 60V will be better.
Come on.  Go with the circuit first, and then start your first amplifier project.

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