[sdiy] Capacitor substitution

Bob Weigel sounddoctorin at imt.net
Tue Apr 3 00:32:28 CEST 2007


Jeff's link is for 51pf, and up.  That at least gets you one value you 
need and again you can put those in series combinations..eg. two of the 
62pf or whatever to make close enough toa 33pf.   3 of them to make 
close enough to a 20pf unit.  Those...62pf 5% ones...why are they more 
expensive...?  Well I'd..steer away from those.  Maybe they are .5% ya 
think? They're all 2.5% otherwise but that's of course initial value 
tolerence not drift I'm sure :-).  -Bob

mrmike wrote:

> Having failed in my search for small value (<100pF) polystyrene caps, 
> I was looking at a quality substitution. I can't find any 
> polycarbonate either. Or polypropylene.
>
> Would a good mica (rated at +/- 1pF tolerance) be a good substitute?
>
> mrmike
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