Capacitor markings...?

[Joel Govostes]

I'd appreciate some clarification on capacitor markings and values.

I thought that, for instance, a marking like "102" would mean 10 x 10^2 pf,
or 1000 pf.

Now, yesterday I went to a local shop to pick up three capacitors I needed.

One was 100pf, disk ceramic.  When I got home I looked at the marking, and
it read "100".

A second was also 100 pf, and read "100J".

The other was a silver mica, supposed to be .0022 mf, and it read "222J".

SO, this gets somewhat confusing.  Wouldn't a marking of "100" mean
10 x 10^0, = 10 pf?  And would the "222" mean 22 x 10^2 pf = .0022 mf?  I'm
missing something on the convention here.

Thanks!
JG

--- --- --- --- --- --- --- --- --- --- --- --- --- --
To subscribe: listserv at listserv.tempe.gov
and in body: subscribe BOATANCHORS yourfirstname yourlastname
To unsubscribe:  listserv at listserv.tempe.gov
and in body: signoff BOATANCHORS
Archives for BOATANCHORS: http://www.tempe.gov/archives
--- --- --- --- --- --- --- --- --- --- --- --- --- --