Ceramic capacitor codes

[Kevin]

hey guys,

i picked up a bag of cool-looking old ceramic caps at the local surplus place, but i'm a little unsure of the numbering system.

i understand that the first two digits are the significant figures, the third is the multiplier, and the unit is picofarads. so, a "221" cap is 220pf. when a cap has zero as the multiplier, does this really mean no zeros? ie, is a "220" cap really just 22pf, or a "470" cap just 47pf? or are these 220pf and 470pf?

thanks for any responses, and sorry for the banal question.

kevin

[Bluesgeetar]

Download this program and use. It is a wonderful little time saver.

http://www.electronics2000.co.uk/download.htm#assistant

[novosibir]

... so, a "221" cap is 220pf. when a cap has zero as the multiplier, does this really mean no zeros? ie, is a "220" cap really just 22pf, or a "470" cap just 47pf? or are these 220pf and 470pf?

470 & 471 means the same -> 470p, as well as 220 & 221, what's 220p

When the last number increases, then it's the number of 'zeros' to add

472 = 4700p = 4.7n
473 = 47000p = 47n
aso.

Larry