This be pre mic circuit is easily. That use dynamic microphone well. It uses transistor 2SC828 numbers perform to enlarge a signal from mic. It give the power goes up for subsequently submit go to still power amplifier. In the circuit will think to use the a little equipment then builds good easy.
These are often found inside old 2way radio microphones
Notice how the transistor bias current flows through the microphone. A similar circuit can be used with an 8 ohm speaker but in that case you would put it in place of the emitter resistor. This circuit works as a carbon microphone replacement.
Link : http://www.members.shaw.ca/novotill/DynamicMicPreamp/index.htm
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This entry was posted on Monday, May 18th, 2009 at 9:47 am and is filed under Pre Amplifier - microphone preamp.
