• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

help disigning 12AY7 based mic pre

Hi,

I recently purchased a 12AY7 based mic pre removed from an RCA BC-3C mixer. Follow this link for schematics, a picture, and BC-3C block diagram:
http://www.idealfreedistribution.com/preamp.html
I was looking for suggestions in building the input section and output section (especially transformers) and building (or purchasing) a power supply.
Any help would be appreciated.
Thanks,

Craig