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Article #1224Re: Tingles from power supply
From: StickThatInYourPipeAndSmokeIt
Date: Sat, 14 Mar 2009 00:45
Date: Sat, 14 Mar 2009 00:45
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2177 bytes
On Fri, 13 Mar 2009 02:05:02 -0800, Robert Baer <robertbaer@localnet.com> wrote: >Eeyore wrote: > >> >> Robert Baer wrote: >> >> >>> AFAIK wall warts never use line filters. >> >> >> Oh, they have to be filtered ( to meet EMC regs ) but may use some very simple >> ones at very low powers since that's all that's needed. >> >> Graham >> >> > I have never seen a transformer type wall wart with a filter; the >switchers are not so common and being newer kids on the block that tend >to generate EMC, would have some kind of filtering. Yes. Switchers are noisy, but I would venture that these small, barely capable types are even worse than OEM open frame or off-the-shelf types. They actually have a few design cycles in most of them. These El Cheapo mini-switchers are likely the biggest source of local noise around.
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X-Google-Thread: 112d1e,5985c699c60fb1f8 X-Google-Thread: 103407,5985c699c60fb1f8 X-Google-Attributes: gid112d1e,gid103407,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: arc1-ca.pugleaf.net!g2news1.google.com!news2.google.com!npeer03.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!post02.iad.highwinds-media.com!newsfe15.iad.POSTED!7564ea0f!not-for-mail From: StickThatInYourPipeAndSmokeIt <Zarathustra@thusspoke.org> Newsgroups: sci.electronics.design,aus.electronics Subject: Re: Tingles from power supply Organization: thusspoke.org Message-ID: <ievlr4pnutev2surrpfsuhjb0f8nitmlg2@4ax.com> References: <00b89736$0$7237$c3e8da3@news.astraweb.com> <l-mdnUMjnsFjjSrUnZ2dnUVZ_hGcnZ2d@posted.localnet> <2g4er4dpng75mfps0dhn3i4acoiccnivin@4ax.com> <ecCdnaCwHseXACXUnZ2dnUVZ_qvinZ2d@posted.localnet> <49B8AB99.DFD8E583@hotmail.com> <TsadnTMx4o1evCfUnZ2dnUVZ_rXinZ2d@posted.localnet> X-Newsreader: Forte Agent 4.2/32.1118 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Lines: 27 NNTP-Posting-Host: 72.197.142.200 X-Complaints-To: newsmaster@cox.net X-Trace: newsfe15.iad 1236991550 72.197.142.200 (Sat, 14 Mar 2009 00:45:50 UTC) NNTP-Posting-Date: Sat, 14 Mar 2009 00:45:50 UTC Date: Fri, 13 Mar 2009 17:45:40 -0700