[sdiy] cap question

[Ian Fritz]

At 05:31 AM 8/6/2009, mailing gigaspeeds wrote:
>hey guys, I need some polystyrene caps but the place where I order stuff 
>doesn't have them.
>
>I was thinking of substituting with the same value with silver mica's.
>It's to be used in a filter design, more precisely the mankato filter
>
>is that OK ?

It's OK.  But your best bet nowadays is to use NP0 or C0G ceramics.  I've 
tested them in some of my super-stable VCO designs and so far they have 
worked just as well as PS.

   Ian