[sdiy] precision/matched capacitors??

[Jim Patchell]

    In general, 1% tolerance is about the best you will find, and even at
that, 1% is difficult to locate at your convenient parts suppliers.  Also,
when you are talking precision caps, you are talking about caps that use the
better dialectrics.  I remember on one job I did I used 1% polystyrene caps.
They were not cheap.

    If you need matched caps, get a good capacitance meter, purchase a bunch
of 5% polystyrene caps (mouser sells these), and measure away.  Polystryrene
caps are pretty stable, so once you know the value, it isn't going to change,
much....

    Now, if somebody could suggest a capacitance meter....

    -Jim

media at mail1.nai.net wrote:

> You can buy precision resistors, you can buy matched semicinductors, but
> can you buy precision caps, or number of matched caps built into the same
> package??
>
> THANX!!