On 11/17/25 16:04, [email protected] wrote:

What mix of ferrite??

 

Should be a #31. See photo

 

I first tried a bunch of regular snap-ons which did very little. Then I found - must admit not sure what the specs are - a ferrite ring in my stash and tried that as well. So probably not the kind that it needs to be... I think it is just easier to find a quiet PS - but who knows!? 

Anyway, this device emits when it is just plugged in (no connection to computer).  So, the ferrites should be around the AC cord? It also radiates through the chassis as wrapping it in Al foil helped a bit. I think a hammer - as suggested earlier - is the best tool for this one.

But if anyone has suggestions for RF quiet 100W USB-C power supply, let me know (if there is any???).

Jussi (aa6kj)