[sdiy] Walt Jung and Richard Marsh's Capacitors article

[harry]

Besides the distortion of the ceramic cap (which MAY not be so bad considering
that it is voltage dependant... and many apps are very low signal voltage)
there is
the often terrible value change with temperature...

OTOH if it is a guitar fuzzbox who cares ???

H^) harry

Theo wrote:

> Yep, Think your right and polyxxx are cheap enough to use everywhere where
> audio is.
>
> About the right cap in the right place.
> Did anybody try "bad" ceramic caps in a VCF,
> or is the distortion: not interesting / not audible enough / too damn ugly,
> for this application.
>
> Cheers,
> Theo
>
> > I can't agree...
> >
> > Polystyrene, Polypropylene, and Teflon caps come out
> > "on top" because they are physically superior dielectrics.
> > Caps made with them have less "parasitic" elements that you
> > do NOT want in a capacitor.
> >
> > OTOH... All other cap types have their places... some are much
> > smaller, some excel at high temperatures, most are less expensive.
> >
> > You have to make an informed choice.  Would you use a teflon cap
> > for a power supply filter ???   MAYBE... if you are building a spacecraft
> > and the nearest repair depot is 15 million miles away...
> > (obviously PRICE is no object...)
> >
> > But usually... no, I'll take the electrolytic. Thanks.
> >
> > H^) harry
> >
> >
> > >From: Neil Jendon <neil at newcontrol.com>
> > >To: Untitled <synth-diy at node12b53.a2000.nl>
> > >Subject: Re: [sdiy] Walt Jung and Richard Marsh's Capacitors article
> > >Date: Fri, 26 Jan 2001 11:04:02 -0800
> > >
> > >Hi,
> > >
> > >I should note that I realized after further poking around that the
> > >above-mentioned article was on a cap-manufacturer's website. They make
> > >polystyrene, teflon, and polyprop caps, so it's little wonder that those
> > >types came out on top.
> > >
> > >Also, the note about tantalum caps in Neve modules explains why I was
> never
> > >a fan of them.
> > >
> > >-neil
> > >
> >
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