Re: Calculating unequal cap strings.

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Terry Fritz" <twftesla-at-uswest-dot-net>

HI Jonathan,

You want to add them in "parallel" not "series".

For caps in parallel:

Ctotal = c1 + c2 + c3...

For caps in series:

Ctotal = 1 / (1 / c1 + 1 / c2 + 1 / c3...)

In your series case:

1 / ( 1 / 0.025 + 1 / 0.0018 ) = 0.00168

put them in parallel:

0.025 + 0.0018 = 0.0268


Cheers,

	Terry


At 06:58 AM 5/6/2001 -0700, you wrote:
>Howdy All,
>
>I am having difficulties calculating cap strings. For example, I have a
>.025uf cap, and if I add a .0018 cap to it (actually 2 * .00097) in
>paralell, I get .0268 like I would expect. But when I do them in series, I
>get .0017??!! Can anybody enlighten me? I can calc cap strings with
>identical values easily, but I can't figure this out. Any info or source of
>info will be great.
>
>Thanks All,
>
>Jonathan Peakall
>