Actually, KA7OEI is on the right track. Be prepared to be disappointed with
regards to RFI from Chinese dc-dc converter modules. Extensive input and output
filtering MUST be added if you want to eliminate a significant amount of the
conducted emissions garbage. And no, there is no “progress” in the world of
these modules. I have detailed reviews of two such modules on my RFI page, with
modification and filtering recommendations.
http://wb9jps.com/Gary_Johnson/RFI.html
<http://wb9jps.com/Gary_Johnson/RFI.html> One uses an LM2596, the other a
MP1584EN. The latter is astoundingly bad for several reasons...
-Gary NA6O
>
> I haven't tried it, but KA7OEI has a page about suppressing RFI in these
>
> http://ka7oei.blogspot.com/2015/02/a-quiet-5-volt-usb-car-power-supply.html?m=1
>
> <http://ka7oei.blogspot.com/2015/02/a-quiet-5-volt-usb-car-power-supply.html?m=1>
>
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