Also I did not build the SMPS. I built a PSU that uses an SMPS, which is an off the shelf component.
I assumed this much. I was just making a passing comment as to try and start on the least confrontational path. Anyway, as I have run into so many times before, people are too sensitive to deal with this level online.
I will remind you of this. There are two types of EMI, radiated and induced. Shielding helps with radiated, but induced (induction) EMI is another beast. This is where the noise enters into the conductors. SMPS emit higher frequency EMI. Electro Magnetism can be an elusive mistress.
