jmz
Member
The surface of the aluminum case of Chinese products is electrically insulated by an anodized coating.
And the aluminum case and the ground of the PC board are not connected. Therefore, the shielding effect is low against high frequencies.
In addition, Intel's NUC started to use more plastic for the case from the NUC8ix series, and the shielding effect became worse.
Thank you for the answer.
Is 3mm brass plate which I used good enough? What about stainless steel? I saw on internet that some people are covering inside side of this DAC with self adhesive copper film. Dose it make sense? From my point of view the problem is solved... but I'm happy to learn more for the future. As I said before... in the future I will separate them more. But for today it will have to stay this way.