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</o:shapelayout></xml><![endif]--></head><body lang=FR-CA link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>I wonder if Vishay caps (MKT370 Polyester metallized series)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'><a href="https://www.vishay.com/docs/28108/mkt370.pdf">https://www.vishay.com/docs/28108/mkt370.pdf</a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>that I used in my Moog clone Low pass filter M104A<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'><a href="http://www.arcenson.com/projects/Modular/M104A_Lowpass_Filter_Moog_904A_clone/Module_pictures/">http://www.arcenson.com/projects/Modular/M104A_Lowpass_Filter_Moog_904A_clone/Module_pictures/</a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>are similar to WIMA caps.. There casing looks pretty much similar..<br>These Vishay caps sound really great anyway.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>Hmmm…<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=FR style='font-size:11.0pt;font-family:"Calibri",sans-serif'>De :</span></b><span lang=FR style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Synth-diy <synth-diy-bounces@synth-diy.org> <b>De la part de</b> Mike Bryant<br><b>Envoyé :</b> 25 septembre 2022 13:13<br><b>À :</b> ColinMuirDorward <colindorward@gmail.com>; pata@ieee.org<br><b>Cc :</b> synth-diy@synth-diy.org<br><b>Objet :</b> Re: [sdiy] The best types of capacitors to use when designing a VCF<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p><div><div><p class=MsoNormal><span lang=EN-GB>------->Technically, what are the known differences between C0G and polypropylene caps? <o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'>>> </span><span lang=EN-GB>Hopefully someone else can shed light here. The best I could do would provide silly descriptors like the WIMAs sounded more buttery while the c0g sounded more crisp. I feel like I can hear that crisp quality in my Spectra console <span style='color:#1F497D'>>> </span>EQ... but this could be pure fantasy!<span style='color:#1F497D'><o:p></o:p></span></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>My first thought would be were they really polypropylene and not the polyester ones that look the same but are generally smaller for unit capacitance ? <o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-GB>-------> I've always wondered in such blind tests to what extent I'm truly listening to component quality. In many cases component tolerances (parameter spread) could yield audible differences, e.g. making the cutoff frequencies in 4 subsequent stages of a VCF much less aligned, softening the filter response. <o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-GB style='color:#1F497D'>>> </span><span lang=EN-GB>Definitely agree here. In my case I chose WIMA vs c0g with the same tolerance, but I wouldn't have measured each cap so maybe I got lucky and grabbed two WIMAs of *exactly* the same value, or maybe they were *perfectly* <span style='color:#1F497D'>>> </span>imbalanced values which spread the poles in a nice way. <span style='color:#1F497D'><o:p></o:p></span></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>If from the same batch then usually they are pretty closer. Tolerance is more usually a batch to batch issue.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-GB>--------->Of course distortion may be what you are after of course in making something ‘sound good’ :-)<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-GB>Polyester film for ms20 VCF all the way!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Try X7Rs :-)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p></div></div><div><div><div><div><div><div><div><p class=MsoNormal><span lang=EN-GB><o:p> </o:p></span></p></div></div></div></div></div></div></div></div></div></body></html>