How to make voltage for pre-amplifier front:
This is a voltage for a pre-amplifier. This is the best voltage regulator circuit diagram. can change the voltage as we want. here used tip41 and tip42. tip41 is a positive transistor and tip42 is a negative transistor. this is a positive and negative and ground voltage. the voltage will be according to the ziner diode. if used a 5-volt ziner then we can get 5 voltage. or if we want to use a 12-volt ziner diode then we get 12 voltage.
This is the diagram
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