single transistor preamp circuit

what is a preamp?

do you know what is a preamp and why using a preamp? the preamp is a series of electronics used to amplify the microphone signal before it is finally amplified by the amplifier. The simple preamp can be make using single transistor

Do you know why using a preamp?

The preamp is used because considering the signal generated by the microphone is very small then if using the amplifier is not enough and not yet able to vibrate the loudspeaker

In this article, admin will discuss how to make a single transistor preamp circuit

Therefore before the microphone signal goes to the amplifier then first the signal must be amplified by using preamp

after you know what is a preamp the next you need to explain how to make a simple transistor preamp circuit using components that are easily available on the market

the single transistor preamp circuit is very simple and easy to make

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how to make simple transistor preamp circuit?

the following preamp circuit is very simple and works on a 12VDC voltage and uses an NPN C828 transistor as the main amplifier. If you do not find the transistor C828 you can replace it with C945 transistor

these 2 types preamp mic that can be made. as for the type of preamp are as follows

  1. Single transistor preamp circuit for condenser microphone
  2. Single transistor preamp circuit for dynamic microphone

The complete list of components needed to make a simple transistor preamp circuit above is as follows

component list

  • R1 ………………. 10K
  • R2 ………………. 220K
  • R3 ………………. 5.6K
  • R4 ………………. 560R
  • C1 ………………. 100nF
  • C2 ………………. 47uf / 16V
  • C3 ………………. 4.7uF / 16V
  • T1 ………………. C828 / C945
  • Vr ………………. 10K-100K

single transistor preamp circuit schematic (for condenser microphone)

what is a preamp, single transistor preamp circuit for condenser microphone

The above circuit can be used for condenser type mic. The physical shape of the condenser mic is a tiny little different from a spool mic that looks quite large

To adjust the mic volume you can set it to VR or potentiometer

If you want the above circuit can be used to strengthen the mic type dynamism (spell) then R1 is worth 5k6 can be removed so the circuit becomes as follows

simple preamp circuit for the dynamic microphone

simple transistor preamp circuit for dinamic microphone

By using the simple transistor preamp circuit above then the sound coming out of the loudspeaker will be more loudness

To increase the sound echo effect you can use the echo circuit. The echo circuit is often used in karaoke, studio, mosque places so that the sound produced is more professional

Similarly an article about how to make a simple transistor preamp circuit. Please also read my article about preamp circuit 2 transistors

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