Value of these Caps?

[Froste]

Can anyone tell me the value of these caps? Only way I can measure them is to remove them from the XO board. I'm just not sure if my guess is right.


This one is labeled 225K


This ine is labeled 335J


This one is labeled 275K

[bmaupin]

the marking 225 = 22x10^5 picofarads = 2.2 uF. picofarad = 10^-12 farad

so the other 2 are 3.3uF and 2.7uF

Those are good poly caps - no reason to not use them - I do.

- Brad

[Froste]

Thanks Brad,

So K = Picofarad and J = Picofarad, too?

[Eric.DeYoung]

I believe that the letter markings have more to do with the internal "workings" such as temperature coefficients, as well as materials such as polyester, polypropylene, mylar... any of those film types.

[bill]

Tolerances are upper case letters: M = 20%, K = 10%, J = 5%, H = 2.5% and F = ± 1pF.

(From http://www.twysted-pair.com/capidcds.htm)

HTH,
Bill

[depthsounder]

Brad and Bill are correct.

The last digit in the number is the multiplier. The preceding digits are the value.

The letter is the tolerance.

-David