Schematic DIY KitAmplifier for microphone for electret, crystal or Dynamic Microphones
Microphones give very low voltages, which must be Amplified noise as possible. There are various possibilities. Here you will find links to various circuit alternatives

Here you will find Schematic Circuit Diagram for DIY and further information on Amplifier for microphone
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Simple single-stage Transistorverstaerker with PCB Layout www.loetstelle.net/projekte/micpre/micpre.php
Mikrofonverstaerker with JFET Operationsverstaerker, including board layout www.minidisc.org/mic_preamp/Simple%20Stereo%20Electret%20Mic%20Preamp.htm

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