I have a Devolo dLAN Magic 2 and, according to the devolo Cockpit, achieve values of 125 to 300 mbit/s between the 4 installed adapters (one of which is on the router, 2x with wifi, 1x only LAN over 3 floors). Everything was installed correctly without plug connectors in front of the Devolo adapters, but also without worrying about the phases etc. So far so good - happy. So far so good - happy. Now I have built an external power supply unit for a PC (using https://www.digitec.ch/de/s1/product/intertech-netzteil-extern-anschluss-extern-120-w-pc-netzteil-13914783 and https://www.digitec.ch/de/s1/product/intertech-mini-itx-psu-rev2-pc-netzteil-14979465 ) - and as soon as I switch on this PC, the dLAN goes down with constant disconnections, etc...). And it doesn't matter whether I plug the power supply unit into a socket somewhere (where the power supply unit "intoxicates" the devolo dLAN) or behind one of the devolo adapters (which should have an interference suppression filter...). Can a ferrite core clipped around the power cable of the new power supply unit solve this problem or do I have to use a "proper" mains interference suppression filter? I found the following frequency information at the world's largest online retailer The performance of the dLAN adapters from DEVOLO has improved drastically by 50% to 100% after I connected the "Universal broadband mains filter, adapter plug (3 A, 9 k - 100 MHz without overvoltage protection)" from AUTH NachrichtenTechnik upstream of all other devices. It is important to select the lowest possible ampere rating and to omit the overvoltage protection. Then the filter blocks the passage of high-frequency interference most effectively and no varistor short-circuits the dLAN signals. The dLAN signals of the latest standard (Magic II) have a frequency of 2 MHz to 86 MHz. - However, I don't want an EU plug and, depending on where the mains filter is to be installed, there may be more than 750 watts behind it: Thank you very much

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