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So I need to figure out what a green 1H203KT is. How does a n00b figure this out?

Ok, I think it's a .02uf cap. If I have to replace it, would a .022uf do the same thing?

hazelwould wrote:So I need to figure out what a green 1H203KT is. How does a n00b figure this out?

The first two numbers are significant figures, with the third the base 10 multiplier (i.e, number of zeros to add to the end).

The value will be in picofarads (pF, 10^-12 Farads). You will often need to divide by one million (106) to get an answer in microfarads (uF), which is more common.

Your capacitor is marked "203":
So, 20 x 10^3 (or add 3 zeros)
=20,000 pF = 0.02 uF

I have no idea about the 1H or KT parts though

The critical part of all that code mumbo jump is 203k. As others have pointed out, that is a 0.02uf (or 20nf, if you prefer). The K is the tolerance code, which is 10%.

Here's a great resource for looking up cap codes:
http://www.electronics2000.co.uk/calc/c ... ulator.php

And here's a nice table with pf/nf/uf value conversions:
http://www.justradios.com/uFnFpF.html