[sdiy] SSI2144 filter caps

Matthias Herrmann Matthias.Herrmann at jeppesen.com
Tue Sep 12 11:01:00 CEST 2017


Bob Pease wrote about them in this article:
http://www.datasheetarchive.com/files/national/htm/nsc03883.htm

he mentions the NP0/C0G ceramics together with the polysterene, polypropylene and teflon in one breath.



> -----Original Message-----
> From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of Guy
> McCusker
> Sent: Tuesday, September 12, 2017 10:19 AM
> To: SYNTH DIY <synth-diy at synth-diy.org>
> Subject: Re: [sdiy] SSI2144 filter caps
> 
> Didn't Ian Fritz teach us that NP0 is just as good as polystyrene?
> (Provided you can obtain a cap of the correct value of course.)
> 
> Right now all I can find is this message in the archives:
> https://urldefense.proofpoint.com/v2/url?u=https-3A__synth-
> 2Ddiy.org_pipermail_synth-2Ddiy_2011-
> 2DApril_031915.html&d=DwICAg&c=P3aKjizb3qsxp0SERaL2sw&r=Wo0ERRj3
> NwEx1MVmRi7Tj3kJss6CkyI0BMe1OujCfok&m=SoME4Dm00woEmHOMt_1el
> Y92treq5myVZ7Ytw33OKcQ&s=g1benur1ArNww0lqHDQ_0yb9LU67t_FCKz5O
> eT3eubY&e=
> 
> If Ian has more to say I would love to hear it...
> 
> On Tue, Sep 12, 2017 at 8:28 AM, Roman Sowa <modular at go2.pl> wrote:
> > I used NPO 0603 ceramics, and it sounds great.
> > https://urldefense.proofpoint.com/v2/url?u=http-
> 3A__www.synthdiy.eu_fi
> >
> les_2144.jpg&d=DwICAg&c=P3aKjizb3qsxp0SERaL2sw&r=Wo0ERRj3NwEx1M
> VmRi7Tj
> >
> 3kJss6CkyI0BMe1OujCfok&m=SoME4Dm00woEmHOMt_1elY92treq5myVZ7Y
> tw33OKcQ&s
> > =N3mJJ-HNjKDQ1r2pYu7xdLSPf8TeAtUWFdizPROoIo0&e=
> >
> > There are also 3 audio examples in my Soundcloud if anybody is interested.
> >
> > Roman
> >
> > W dniu 2017-09-12 o 00:19, Tim Ressel pisze:
> >>
> >> Yo,
> >>
> >> So I am working on SSI2144 filter designs and I can't help but notice
> >> the polystyrene caps are biggish. Can I get away with poly film box caps?
> >>
> >> --tr
> >>
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