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?
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.
It means 6.8k ohms and 4.7k ohms.
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