<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">*citation required<div class=""><br class=""></div><div class="">rob.<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On 2 Aug 2022, at 16:46, Josh Nursing via Synth-diy <<a href="mailto:synth-diy@synth-diy.org" class="">synth-diy@synth-diy.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="">SMPS are the most polluting/noisy PSUs for audio purposes. Lots of high-frequency current spikes affect both downstream circuits and the mains they're connected to.</div><div class=""><br class=""></div><div class="">And before you start telling me about filtering the output of them, that does absolutely nothing for the mains-side noise.</div><div class=""><br class=""></div><div class="">Effects on audio are across the board - all audio frequencies suffer, and it's probably more noticeable in loss of bass frequencies.<br class=""></div></div><br class=""><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Aug 2, 2022 at 11:41 AM Mike Bryant <<a href="mailto:mbryant@futurehorizons.com" class="">mbryant@futurehorizons.com</a>> wrote:<br class=""></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<div class="gmail-m_5130049013457625315WordSection1"><p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)" class="">How can audio suffer from putting a PSU in with 100 times better performance ? No 50/100Hz at all and general noise almost zero. And it’s far less heat
so everything else runs cooler and better. I think too many people see the noise from their phone charger or whatever and assume a proper SMPS is like that.<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)" class=""><u class=""></u> <u class=""></u></span></p><p class="MsoNormal"><span style="font-size:11pt;font-family:"Calibri","sans-serif";color:rgb(31,73,125)" class=""><u class=""></u> <u class=""></u></span></p><p class="MsoNormal"><b class=""><span style="font-size:10pt;font-family:"Tahoma","sans-serif"" lang="EN-US" class="">From:</span></b><span style="font-size:10pt;font-family:"Tahoma","sans-serif"" lang="EN-US" class=""> Synth-diy [mailto:<a href="mailto:synth-diy-bounces@synth-diy.org" target="_blank" class="">synth-diy-bounces@synth-diy.org</a>]
<b class="">On Behalf Of </b>Josh Nursing via Synth-diy<br class="">
<b class="">Sent:</b> 02 August 2022 16:35<br class="">
<b class="">To:</b> Synth DIY<br class="">
<b class="">Subject:</b> Re: [sdiy] Help with Jupiter 8 clone<u class=""></u><u class=""></u></span></p><p class="MsoNormal"><u class=""></u> <u class=""></u></p>
<div class=""><p class="MsoNormal">I really don't like the idea of replacing the linear PSU in those vintage synths with a SMPS one. Audio suffers.<u class=""></u><u class=""></u></p>
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<div class=""><p class="MsoNormal">On Tue, Aug 2, 2022 at 7:45 AM Adam (synthDIY) <<a href="mailto:synthdiy@adambaby.com" target="_blank" class="">synthdiy@adambaby.com</a>> wrote:<u class=""></u><u class=""></u></p>
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<div class=""><p class="MsoNormal">Luís, I assume you’re aware of this<u class=""></u><u class=""></u></p>
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<div class=""><p class="MsoNormal"><a href="https://synthronics.de/roland-jupiter-8-new-psu/" target="_blank" class="">https://synthronics.de/roland-jupiter-8-new-psu/</a><u class=""></u><u class=""></u></p>
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<div class=""><p class="MsoNormal">and this guy, who has been ominously quiet of late<u class=""></u><u class=""></u></p>
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<div class=""><p class="MsoNormal"><a href="https://jup8restoration.wordpress.com/2019/10/22/new-power-supply-being-manufactured-for-a-jupiter-8/" target="_blank" class="">https://jup8restoration.wordpress.com/2019/10/22/new-power-supply-being-manufactured-for-a-jupiter-8/</a><u class=""></u><u class=""></u></p>
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<div class=""><p class="MsoNormal">A<u class=""></u><u class=""></u></p>
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<div class=""><p class="MsoNormal">On 2 Aug 2022, at 3:57 am, Luís Marka via Synth-diy <<a href="mailto:synth-diy@synth-diy.org" target="_blank" class="">synth-diy@synth-diy.org</a>> wrote:<u class=""></u><u class=""></u></p>
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<div class=""><p class="MsoNormal">Hi guys,<br class="">
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I am giving a serious thought about building a Jupiter 8 clone, and started to take a deeper look at the schematics (actually I already ordered some of the parts, so it looks like I will get it done eventually). In the PSU there are three GP-30G diodes tied
at the -15, +15 and +5V outputs, listed as "Hi-Fi Special" both in the schematics and in the parts list. I never heard anything about a "hi-fi special" diode, any idea what that means??<br class="">
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Cheers!<br class="">
<br class="">
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