[RFI] Power Over Ethernet from Switch Mode Power supplies

[Jim Brown]

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