<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=""><br class="">
<div><br class=""><blockquote type="cite" class=""><div class="">On 8 Jan 2021, at 16:02, ColinMuirDorward <<a href="mailto:colindorward@gmail.com" class="">colindorward@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Yesterday I did some very non-scientific testing of 3320 4pole BPF built using C0G vs polypropylenes. The test may have been more about the tolerances of the caps rather than the dielectric, since my polys are 2.5% vs the C0Gs at 5%. I noticed that at lower frequencies, the polypropylene version would go into oscillation before the C0G version. Any thoughts on this?</span></div></blockquote></div><br class=""><div class="">Yes, I think you’re right. That seems more likely to be an effect of the tolerance to me.</div><div class=""><br class=""></div><div class="">Tom</div><div class=""><br class=""></div><div class=""><div>==================<br class=""> Electric Druid<br class="">Synth & Stompbox DIY<br class="">==================</div><div class=""><br class=""></div></div></body></html>