cap question

[List, Christopher]

This cap is the integrator for the VCO. Best bet for a VCO is
Poly"styrene" - can be found in the Mouser catalog, and they only come
in small values (I keep hearing rumors that they aren't being made
anymore - why is that?). Tolerance isn't too much of an issue - temp.
coefficients being more important.

- CList

> -----Original Message-----
> From:	Reverend bluE [SMTP:djblue at asu.edu]
> Sent:	Monday, December 28, 1998 6:46 PM
> To:	DIY
> Subject:	cap question
> 
> 
> okay, I finally found a VCO design that I like (read:  I can find the
> parts
> for it.)
> 
> It is the Maxx2 Master VCO  (VCO-4B)
> http://www.mindspring.com/~vco/maxx2/page_007.html
> 
> the only problem that I have is the word "POLY" printed in red on the
> schematics under the 2N4392 trans.  It would appear that this word
> refers to
> the Cap that it is printed by.  "POLY .002"  
> 
> does this mean I need a Polyester Cap?  I find them, but the tolerance
> is
> poor (+-20%)  the other Polys I find are the Metalized Polypropylene
> Film
> ones, but these are physically big (32mm), and it would be the most
> expensive
> part of the circuit (just about)...
> 
> beyond that, I can't find a .002uf CAP anywhere.  it jumps from 1 to
> 2.2uf.
> So what is the deal here?  
> 
> I guess I have two questions.  The one about the word "POLY" and one
> about
> .002uf CAPs.  yeah.  I think that's all.
> 
> thanks for your time.
> -ben