Comments on: Reducing Kickback Noise in Soundcraft Spirit E6 Mixer Switching Power Supply http://www.neufeld.newton.ks.us/electronics/?p=519 Wed, 25 Mar 2026 22:26:27 -0600 hourly 1 http://wordpress.org/?v=3.1.3 By: Keith Neufeld http://www.neufeld.newton.ks.us/electronics/?p=519&cpage=1#comment-32202 Keith Neufeld Wed, 29 Apr 2015 14:29:28 +0000 http://www.neufeld.newton.ks.us/electronics/?p=519#comment-32202 The 230 VAC at the mains input is the rating printed on the capacitor, not a measurement I took. Sorry for the confusing notation! The 230 VAC at the mains input is the rating printed on the capacitor, not a measurement I took. Sorry for the confusing notation!

]]> By: Soeren Erik Poulsen (Denmark) http://www.neufeld.newton.ks.us/electronics/?p=519&cpage=1#comment-32201 Soeren Erik Poulsen (Denmark) Wed, 29 Apr 2015 13:49:45 +0000 http://www.neufeld.newton.ks.us/electronics/?p=519#comment-32201 Looking at Your very nice schematic of the powersupply, I notise, that You write 230 Volt ac at the mains inlet, but You write 170 Volt dc on the large 100 uF/400 V C18! Could one of Your diodes in the bridge be open circuit? I am right now sitting with a defect PSU. All pins on the ic is active, exept the drive for the FET. Luckily I can buy a new PSU, but these PSU's tends to go faulty. - thought of making an oldfashioned linear PSU, as Rod Elliot makes them. the high voltage for the phantom voltage, could be made by voltage doubling of the 18-0-18 voltage from the transformer. Great blog. Looking at Your very nice schematic of the powersupply, I notise, that You write 230 Volt ac at the mains inlet, but You write 170 Volt dc on the large 100 uF/400 V C18! Could one of Your diodes in the bridge be open circuit? I am right now sitting with a defect PSU. All pins on the ic is active, exept the drive for the FET. Luckily I can buy a new PSU, but these PSU’s tends to go faulty. – thought of making an oldfashioned linear PSU, as Rod Elliot makes them. the high voltage for the phantom voltage, could be made by voltage doubling of the 18-0-18 voltage from the transformer. Great blog.

]]> By: Dave McEwen http://www.neufeld.newton.ks.us/electronics/?p=519&cpage=1#comment-28275 Dave McEwen Fri, 02 Sep 2011 20:26:15 +0000 http://www.neufeld.newton.ks.us/electronics/?p=519#comment-28275 Keith - I relly should have read all related articles before posting on the original repair article...oops. Another good article here, by the way - thanks. Keith – I relly should have read all related articles before posting on the original repair article…oops. Another good article here, by the way – thanks.

]]> By: Keith Neufeld http://www.neufeld.newton.ks.us/electronics/?p=519&cpage=1#comment-23096 Keith Neufeld Mon, 27 Apr 2009 16:22:27 +0000 http://www.neufeld.newton.ks.us/electronics/?p=519#comment-23096 Kai, thanks for pointing out the broken link. I had been careless pasting it into the form, and it's fixed now. Regarding the links -- yeah, they're fantastic! And I doubt I could have found them even if I'd tried searching for them. It's really great having people who know where the good stuff is and interested enough and willing to help others out. Kai, thanks for pointing out the broken link. I had been careless pasting it into the form, and it’s fixed now.

Regarding the links — yeah, they’re fantastic! And I doubt I could have found them even if I’d tried searching for them. It’s really great having people who know where the good stuff is and interested enough and willing to help others out.

]]> By: Kai Backman http://www.neufeld.newton.ks.us/electronics/?p=519&cpage=1#comment-23095 Kai Backman Mon, 27 Apr 2009 15:40:37 +0000 http://www.neufeld.newton.ks.us/electronics/?p=519#comment-23095 The Snubber wikipedia link is broken. Great article again, thanks for summarizing everything. The EMI and scope probe links were worth their weight in gold! :-) The Snubber wikipedia link is broken. Great article again, thanks for summarizing everything. The EMI and scope probe links were worth their weight in gold! :-)

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