I am planning on building a project I found on headwize.com. It is a headphone amp designed by Andrea Ciuffoli. Since this is the first time I will be useing the E182CC and 6SN7 Tubes I know nothing about them or more accurately their pins. I am looking for a data sheet or information on how I can identify which pin on the tube corresponds to which pin on the schematic. Is there some place online I might be able to order data sheets for these tubes from?