What's the simplest mic preamp I can build?

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CFC

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Joined 2005
#1
Hey guys,

I'll be getting a couple of Panasonic WM-61A from Digikey so that I can build a mic/preamp setup for frequency response testing. I've seen a preamp from Eric Wallin's site here , but it seems a little too intricate.
Is there any basic, crude preamp I can build that will do the trick? I will be using Speaker Workshop for the readings.

Thanks,
CFC
 
#2
CFC said:
Hey guys,

I'll be getting a couple of Panasonic WM-61A from Digikey so that I can build a mic/preamp setup for frequency response testing. I've seen a preamp from Eric Wallin's site here , but it seems a little too intricate.
Is there any basic, crude preamp I can build that will do the trick? I will be using Speaker Workshop for the readings.

Thanks,
CFC
Click to expand...


this is another relativly low-cost approach:

https://securewsch01.websitecomplete.com/sharrongrp/shop/showDept.asp?dept=629
 
#8
Roger Hill said:
Quick, easy and cheap. I've used it for a while and it does everything I need. One transistor circuit..........


http://www.tkk.fi/Misc/Electronics/circuits/micamp.html

Roger Hill
Click to expand...

This is a bit worrisome: "Because of the simplicity of the design the distortion performance is not very good. At signal levels typically used by electret microphones the distortion is about 2-3%."

Here's an easy design with better performance:

http://www.linkwitzlab.com/sys_test.htm#Mic
 
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