[sdiy] NPO caps in P08 and Andromeda

[Ian Fritz]

At 06:36 PM 12/10/2008, David G. Dixon wrote:

>Polystyrene caps are expensive and a pain to get, whereas silver mica and
>polypropylene caps are cheap and widely available.  If the capacitor doesn't
>have to hold a charge rock-constant for a significant period of time, then
>why bother with polystyrene?

1.) Low leakage is also important for accurate VCO tuning

2.) Negligible soakage, nonlinearity, etc.

That being said, I have found that NP0 (C0G) ceramic caps are very good in 
these areas, and I'm now usually using them in place of polystrene.


   Ian