SubscribeHigh gain microphone preamplifier electronic project
A very simple high gain microphone preamplifier electronic project can be constructed using this circuit diagram .
This microphone preamplifier electronic project is based on transistors and is capable of about 70dB or more gain at audio frequencies . Gain of this circuit is approximately equal to the product of the hfe of the both transistors times in the ratio of the load resistance to the input resistance of the preamp . As an approximation , these resistance are usually similar in value (2 to 5k) for most applications , so this ratio can be taken as unity .
As you can see in the circuit diagram , this electronic project use some common electronic parts and it must be powered from a 12 volt DC power supply .
Circuit Diagram:
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