When i first realise i would need a preamp to get the microphone signal to line level for my interface (Behringer UCA202), I initially thought i would use a LM358. However upon more research i found that although this would be adequate a more appropriate intergrated circuit would be the NE 5532, which is a high performance low noise operational amplifier.
Low noise integrated circuit: http://www.onsemi.com/pub_link/Collateral/NE5532-D.PDF
Old Circuit Design -
New Circuit design with NE5532 8 pin DIL IC -
Consideration to the potential of need two preamps with phantom power to support condenser microphones:
-power supply- http://sound.westhost.com/project96.htm