I'm following a schematic that calls for 330nF, 120nF and 100nF caps. I can't find a source for nanofarad caps in the US. Are they common? Even converting to pF/uF I still can't find a match.
Does anyone know where I can get them from?
You should be able to get the 330 and the 100 from any of the major distributors. Not sure about the 120 though. Try places like
Oops, you're right - I goofed in my conversion. They're more common than I thought...
0.33 uF and 0.1 uF are common here. 0.12 uF may be less so, but would 0.1 uF substitute for it?
330nF is just another way of saying 0.33uF and so on.
Its use is encouraged in order to avoid using the decimal point in component values. The idea is that photocopying cannot reliably reproduce a decimal point and also a speck of dust might look like a decimal point so it's best to avoid them.
Even so, you should be able to find nF values very easily.
Graham
p.s. values like 0.0047uF always drove me nuts. I never could be sure what size it was meant to be (it's 4.7nF or preferably 4n7), humans do not instinctively respond well to number values several zeroes beyond the decimal point. Research shows IIRC that we intuitively 'grasp' number values in the 1-1000 range best.
What drives me nuts is catalogs that express 0.1 uF as 100000 pF, with no commas for the thousands separator, and in small print. Counting teeny tiny zeroes all next to each other is a pain! There seems to be a real aversion, on the part of some people, to using nF.
Mark
point
avoid
size
instinctively
Research
best.
It's aeons since I saw that kind of thing. It's equally daft.
It's purely an American thing.
Compare with Farnell for example.
Graham
On Sat, 17 Nov 2007 03:49:35 +0000, Eeyore wrote: ...
Easy. It's 4700 pF. ;-)
Cheers! Rich
In that case, I'd look at the manufacturer's part number, or other order number - there's probably a "104" in it somewhere for an 0.1uF.
-- Peter Bennett, VE7CEI peterbb4 (at) interchange.ubc.ca
That is at least slightly more comprehensible but it get crazy when you get to
47000pF.Graham
-- I can\'t imagine why. What do you think \'473\' written on the body of a capacitor means?
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