polystyrene pf value caps

Started by arfy, March 30, 2005, 12:00:02 PM

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arfy

Anyone tried the caps like this from Mouser yet?
23PS110     Xicon Polystyrene Fi  STYRENE 50V 100P  
I've only seen ceramic or mica in 100 pf before.
I'm wondering if they sound better than ceramic or mica, since those two types seem to have issues for a lot of people.

bwanasonic

There aren't too many circuits I know of where a 100pf is in a *tone critical* position. If it's just a bleed to ground, I doubt you would notice much difference. Across the legs of a transistor in a fuzz type circuit - maybe. I have found silver-mica to work fine in this function.

Kerry M

mojotron

I use the 470pf polystyrene cap in the Gov'nor design. I think the ceramic caps are a little more variable in value, and the polystyrene do sound a little smoother

trjones1

I think at Fuzzcentral they recommend the polystyrene caps for the .01uf position on the McCoy wah.  I got a pair to use for when I put my wah back together.

scottosan

Quote from: arfyAnyone tried the caps like this from Mouser yet?
23PS110     Xicon Polystyrene Fi  STYRENE 50V 100P  
I've only seen ceramic or mica in 100 pf before.
I'm wondering if they sound better than ceramic or mica, since those two types seem to have issues for a lot of people.
I have used them in a BSIAB2 build. I likem.  I've also used WIMA's in the smaller sizes

toneman

polystyrene caps are much more temperature stable.
they are used as the integrating cap on many synth VCOs.
they havel 5% & 10% tolerances, but are stable.
I used them in my McMeat instead of polyproplene.
staycapped
tone
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DiyFreaque

I always use polystyrene as timing caps for VCO's and filters for the same reasons Toneman gives.

I did use the 100 pf value polystyrenes mentioned above for the timing of the clocks in the Dim C project.   IIRC, the same value is used in the Polyfusion VCLPF and VCHPF filters, much prized amongst synth enthusisasts.

Cheers,
Scott