> If I have a cap that it's value is '473' is it 0.047uf ?

Yes, 473 is the EIA code

It's an expression of the cap's value in picofarads, that
is, 47 followed by 3 zeroes = 47,000pF. An alternative
(which some folk don't like) is 47n. There was a little
chat about this probably a couple of months ago, as it
related to multipliers like "u" "n" "p" and bad handwriting

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