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[Q] How to modify mic pre-amp to higher gain?

post #1 of 2
4/5/11 at 12:21pm
Thread Starter 
I'm currently trying to modify the input of a Velleman MK140 audio kit to accept an electret condenser style microphone (generic computer mic), because it is currently set up to handle a dynamic mic. I could get a preamp kit and feed it into the input, but I thought it might be easier/more compact if I just modded the current input circuit.

The audio quality does not have to be great, so the simplest solution is probably the best. *Yes, I realize this is head-fi, so this statement is ridiculous biggrin.gif. If you know of a forum that might be a better place for this, feel free to post a link.*

Does anyone have any pointers?

500
Mic pre-amp schematic

Manual/Full schematic

Thanks for any help!
Edited by zrbarnes - 4/5/11 at 12:49pm
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post #2 of 2
4/5/11 at 4:46pm

I've used something like this in the past

its very easy and provides power for the mic

 


simplepreamp.gif

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