What's the simplest mic preamp I can build?

CFC · 31st December 2005, 12:54 AM

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

ScottG · 31st December 2005, 05:43 AM

Quote:

Originally posted by CFC
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

this is another relativly low-cost approach:

https://securewsch01.websitecomplete...t.asp?dept=629

rjb · 31st December 2005, 05:53 AM

See also Elliot Sound Products, (ESP) at http://sound.westhost.com for a simple 3 transistor mic amp- PCB available.

Etacovda · 31st December 2005, 09:22 AM

same boat here myself, would like a schem to a simple, affordable pre-amp/jig

Vikash · 31st December 2005, 10:14 AM

Quote:

I've seen a preamp from Eric Wallin's site here , but it seems a little too intricate.

PCB based on Wallin v2 schematic is available.

Roger Hill · 31st December 2005, 06:13 PM

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

CFC · 31st December 2005, 08:31 PM

Quote:

Originally posted by Roger Hill
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

Roger,
You're a gentleman and a scholar

This is exactly what I've been looking for.
Thanks a bunch,
I'll give an update on my setup.

CFC

catapult · 1st January 2006, 10:25 PM

Quote:

Originally posted by Roger Hill
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

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

-_nando-_ · 2nd December 2006, 01:31 PM

Must read:

http://sound.westhost.com/project93.htm

Geek · 2nd December 2006, 10:08 PM

We've been here

DIY microphone

31st December 2005, 12:54 AM	#1
CFC diyAudio Member Join Date: Dec 2005 Location: H-Town	What's the simplest mic preamp I can build? 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

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31st December 2005, 05:53 AM	#3
rjb diyAudio Member Join Date: Jun 2004 Location: Piha	See also Elliot Sound Products, (ESP) at http://sound.westhost.com for a simple 3 transistor mic amp- PCB available.

31st December 2005, 09:22 AM	#4
Etacovda diyAudio Member Join Date: Jan 2005 Location: Wellington	same boat here myself, would like a schem to a simple, affordable pre-amp/jig

31st December 2005, 06:13 PM	#6
Roger Hill diyAudio Member Join Date: Jan 2004 Location: Colorado Springs	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

2nd December 2006, 01:31 PM	#9
-_nando-_ diyAudio Member Join Date: Dec 2005 Location: Sao Paulo	Must read: http://sound.westhost.com/project93.htm

2nd December 2006, 10:08 PM	#10
Geek diyAudio Member Join Date: Sep 2004	We've been here DIY microphone

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