<div dir="ltr">Schottky diodes have a lower reverse peak voltage than silicon diodes, and the reverse leakage current increases with increasing reverse voltage. Once you exceed the maximum reverse voltage, the component is permanently damaged.<div><br></div><div>Not a good idea for a rectifier in a power supply.</div><div><br></div><div>MC</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jul 25, 2024 at 1:52 PM Oren Leavitt via Synth-diy <<a href="mailto:synth-diy@synth-diy.org">synth-diy@synth-diy.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><u></u>
<div>
<p>I'd go with standard 3 amp diodes. e.g. 1N540x, et al<br>
</p>
<p><br>
</p>
<p>- Oren</p>
<p><br>
</p>
<div>On 7/25/24 12:13 PM, Kevin Walsh via
Synth-diy wrote:<br>
</div>
<blockquote type="cite">
<div style="margin-top:1em;margin-bottom:1em;font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Hi all,</div>
<div style="margin-top:1em;margin-bottom:1em;font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
I have a Yamaha CS-30 in for repair that was dead on arrival. It
only needed the dual diodes (D1 & D2) on the PSU replaced to
get it working again.</div>
<div style="margin-top:1em;margin-bottom:1em;font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
I got it working by using two pairs of 1N4001's:</div>
<ul>
<li style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
One pair configured in common cathode</li>
<li style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
One pair configured in common anode</li>
</ul>
<div style="margin-top:1em;margin-bottom:1em;font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Both secondary fuses were replaced with 1.6A fast blow fuses as
per the service manual instructions. Given this, I figured any 2
or 3 amp diodes should work fine.</div>
<div style="margin-top:1em;margin-bottom:1em;font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Being such a nice synth, I'd prefer to have the best long-term
solution. Should I replace them with Schottky diodes for their
lower forward voltage drop and efficiency, or stick with regular
silicon diodes and opt for a higher current rating?</div>
<div style="margin-top:1em;margin-bottom:1em;font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Any tips or recommendations for specific diode models would be
most welcome.</div>
<div style="margin-top:1em;margin-bottom:1em;font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Thanks, </div>
<div style="margin-top:1em;margin-bottom:1em;font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
Kevin.</div>
<div style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<br>
</div>
<div style="font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color:rgb(0,0,0)">
<img style="max-width: 1365px; max-height: 463px;" src="cid:ii_190ec30c4f8465563351"></div>
<br>
<fieldset></fieldset>
<pre>________________________________________________________
This is the Synth-diy mailing list
Submit email to: <a href="mailto:Synth-diy@synth-diy.org" target="_blank">Synth-diy@synth-diy.org</a>
View archive at: <a href="https://synth-diy.org/pipermail/synth-diy/" target="_blank">https://synth-diy.org/pipermail/synth-diy/</a>
Check your settings at: <a href="https://synth-diy.org/mailman/listinfo/synth-diy" target="_blank">https://synth-diy.org/mailman/listinfo/synth-diy</a>
Selling or trading? Use <a href="mailto:marketplace@synth-diy.org" target="_blank">marketplace@synth-diy.org</a>
</pre>
</blockquote>
</div>
________________________________________________________<br>
This is the Synth-diy mailing list<br>
Submit email to: <a href="mailto:Synth-diy@synth-diy.org" target="_blank">Synth-diy@synth-diy.org</a><br>
View archive at: <a href="https://synth-diy.org/pipermail/synth-diy/" rel="noreferrer" target="_blank">https://synth-diy.org/pipermail/synth-diy/</a><br>
Check your settings at: <a href="https://synth-diy.org/mailman/listinfo/synth-diy" rel="noreferrer" target="_blank">https://synth-diy.org/mailman/listinfo/synth-diy</a><br>
Selling or trading? Use <a href="mailto:marketplace@synth-diy.org" target="_blank">marketplace@synth-diy.org</a><br>
</blockquote></div>