I have taken the shielding as far as I can for the time being. Along the way I have experimented a lot and ended up making quite a few changes. I am pretty happy with the result.
To summarise the changes I have retained:
1. Small squares of Laird screening stuck on the streamer RAM
2. Small square of Laird screening stuck on the DAC chip
3. Adhesive copper foil wrapped around the streamer AC/DC adaptor and cable (earthed)
4. Removed the Netgear GS108Tv3 switch and Friwo PS entirely, so the streamer connects via wall socket to the Router.
5. Moved the Hakai NAS and power supply downstairs and connected it to the Router. It is now on a different ring mains to the rest of the system, along with the Router.
The changes I tried but ultimately rejected:
1. Sheet of Laird in the streamer to separate the ATX powerboard and the cables from the motherboard
2. Sheet of Laird stuck to the outside of the SSD
3. Sheet of Laird placed but not stuck inside the SSD
4. Copper foil wrapped around the cables inside the streamer (earthed)
5. Copper foil stuck to the inside of the ESI Gigaport HD DAC (earthed, very fiddly!)
6. Adhesive copper foil wrapped around the NAS AC/DC adaptor and cable (earthed) while connected to the same power wall socket as the streamer.
Playground results here:
https://www.lejonklou.com/forum/viewtop ... 989#p54989