I designed and ordered 3 different PCBs. two of them are conversion boards from DIP to Tssop-16 and So-8 packages. The last one is what I'll build the preamp on. It has a guard ring around the input node, which minimizes leakage currents. I have 10 copies of each board so I don't have to worry about breaking them.
What I do have to worry about is breaking components. For many of them, such as the DAC and OPA129 i do not have any extras, so when I solder them in place I gotta be carefull not to overheat them. The good thing is that I should now have all I need to complete the project. Since I said that I will probably end up needing more parts anyway, but they will hopefully have a shorter delivery time than these boards.
