[RFI] Power Over Ethernet from Switch Mode Power supplies

[Richard Battles]

I have used type 43 and 31 half inch s snap on cores.   Wind at least 3
turns into the core.   I used stranded cat 5e winds better.   Fixed the
carriers on the wire.

On Sun, Jul 7, 2019, 21:24 Jim Brown <jim at audiosystemsgroup.com> wrote:

> On 7/7/2019 4:26 PM, Chuck Gooden wrote:
> > Is there any steps that I can take with this power supply to reduce
> > the radiated and conductive emissions if any?  Like mounting it in a
> > metal EMI case, Torrids on both the input and output leads, more
> > capacitance on the output, etc.
>
> See my advice on killing RX noise. k9yc.com/publish.htm  It starts with
> replacing all SMPS with linear. How much current do you need? Does it
> need to be regulated? What frequencies are you concerned with? Certainly
> choke both ends of every ethernet cable, and every cable connected to
> that system, including AC cables. I've found moderately priced
> un-regulated linear supplies at one of the major electronics
> distributors. Don't recall which one.
>
> 73, Jim K9YC
>
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