<html><body><font face="Helvetica">Right! I tested C0G vs polystyrene in a hi-performance VCO some time ago and they behaved identically, as far as I could tell. More recently, I tested both in my low-leakage S/H experiments and was able to verify leakage down into the low fA region for both types.<br><br>Ian<br><br><br>Sent from XFINITY Connect Mobile App<br><br><br>------ Original Message ------<br><br>From: Guy McCusker<br>To: SYNTH DIY<br>Sent: September 12, 2017 at 2:22 AM<br>Subject: Re: [sdiy] SSI2144 filter caps<br><br>Didn't Ian Fritz teach us that NP0 is just as good as polystyrene?<br>(Provided you can obtain a cap of the correct value of course.)<br><br>Right now all I can find is this message in the archives:<br>https://synth-diy.org/pipermail/synth-diy/2011-April/031915.html<br><br>If Ian has more to say I would love to hear it...<br><br>On Tue, Sep 12, 2017 at 8:28 AM, Roman Sowa <modular@go2.pl> wrote:<br>> I used NPO 0603 ceramics, and it sounds great.<br>> http://www.synthdiy.eu/files/2144.jpg<br>><br>> There are also 3 audio examples in my Soundcloud if anybody is interested.<br>><br>> Roman<br>><br>> W dniu 2017-09-12 o 00:19, Tim Ressel pisze:<br>>><br>>> Yo,<br>>><br>>> So I am working on SSI2144 filter designs and I can't help but notice<br>>> the polystyrene caps are biggish. Can I get away with poly film box caps?<br>>><br>>> --tr<br>>><br>> _______________________________________________<br>> Synth-diy mailing list<br>> Synth-diy@synth-diy.org<br>> http://synth-diy.org/mailman/listinfo/synth-diy<br>_______________________________________________<br>Synth-diy mailing list<br>Synth-diy@synth-diy.org<br>http://synth-diy.org/mailman/listinfo/synth-diy<br></font></body></html>