Hello,
I've seen in a few schematics lately a resistor nomenclature that is new to me, such as "6K8" or "4K7". In such a designation, what do the "8" and "7" refer to? If it weren't for the added eight and seven, I would assume six kilo-ohms and four kilo-ohms, but the added designators are confusing.
Thanks,
Jon
Hope that helps,
Sean
J> Hello,
Aha, thanks, Sean. Makes perfect sense now.
J> 6k8 = 6800 Ohms (6.8 kOhms)
to
"7"
six
It started in Europe. It caught on elsewhere for practical reasons.
I have seen even stranger nomenclature on capacitors. These were in Nuts and Volts schematics. I forget now the exact format, but I was never sure what those meant.
The SI system decimal multiplier prefix symbol is used in place of a decimal point. Very sensible as decimal points are easily lost (or gained) in poor quality print.
Where a multipler of 1 is needed the symbol representing the unit of measurement is used instead.
0R47 would represent a 0.47 ohm resistor for example.You can find a list of SI prefix multipliers and symbols here
Careful with this list.
m used for both milli and micro. n for nono? I know what a nano-second is, but what the heck is is a nono-second?
-- James T. White
Accepted, I didn't check this page it was just the first web reference I found.
This one looks better
Now I know what a nonillionvigintillion is. There's a word that doesn't get many Google hits and all point to copies of the same page.
A very small part of 7 of games that Nolan Ryan pitched? :-)
Tom
Hello, James! You wrote on Wed, 9 Nov 2005 15:00:36 -0600:
JTW> Careful with this list.
JTW> m used for both milli and micro. JTW> n for nono? I know what a nano-second is, but what the heck is is a JTW> nono-second?
Obviously thats no time at all
With best regards, 3T39. E-mail: snipped-for-privacy@hotmail.com
Its to make sure that the decimal point doesn't get lost when documents are copied.
It also saves one character space. Comes handy in crowded schematics.
--
Boris Mohar
It means 6.8k ohms and 4.7k ohms.
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