No, SOME switched mode supplies are noisy and need external filters. Many of the are very good. The problem is you never know what you will get if you buy stuff on eBay. Even if it says "Genuine Acme Brand" it may not be. There are MANY fake products sold.
What I do is buy and test out one and if it works out buy more Remember the woman in China who was electrocuted by the fake Apple iPhone charger? It looked real but inside the manufacture did not have even basic safety design. No isolation from 220 volt mains. The name brand part is very good, no noise and safe even after a fault but cost 10X the price of the fake. On Thu, Dec 29, 2016 at 3:09 AM, Nicklas Karlsson <nicklas.karlsso...@gmail.com> wrote: > Switched power electronics are horrible noise sources. Common mode chokes > in the form ferrite cores usually dampen the noise. -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
