This is what I have working so far. It is good enough to do the voice recording that is on my plate.
I removed the cap and change R4 to 150K. I removed the audio taper on the output.
For now it is in a plastic box. Need to find a metal one that will also hold the 9V battery. Or maybe use a plastic one and wrap the preamp in grounded alu foil.
The attachment is short zipped wave file recorded with it.
I removed the cap and change R4 to 150K. I removed the audio taper on the output.
For now it is in a plastic box. Need to find a metal one that will also hold the 9V battery. Or maybe use a plastic one and wrap the preamp in grounded alu foil.
The attachment is short zipped wave file recorded with it.