Hello everyone,
I built a Der Buffer starting from PCB adding all the components. I double checked all of them, and they look fine in the right position (I opted for building the Germanium version - AC128.
The weird thing is when I engage the buffer (using a 3PDT switch) I notice a drop in high frequencies and a small drop in volume. Pretty much the opposite of what it is supposed to do 
Any idea?
Thanks in advance