Strange resistor nomenclature
Electronics Forum Index Electronics
Circuits, theory, electrons and discussions.
 
 FAQFAQ   MemberlistMemberlist     RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
 
Google
 
Web ElectronicsHelp.net
Strange resistor nomenclature

 
Post new topic   Reply to topic    Electronics Forum Index -> Electronics General
Author Message
Jon Danniken
Guest
Posted: Tue Nov 08, 2005 9:35 am    Post subject: Strange resistor nomenclature Reply with quote
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

Back to top
Sean O'Byrne
Guest
Posted: Tue Nov 08, 2005 9:35 am    Post subject: Re: Strange resistor nomenclature Reply with quote
6k8 = 6800 Ohms (6.8 kOhms)
4k7 = 4700 Ohms (4.7 kOhms)
3M3 = 3300000 Ohms (3.3 MOhms)

Hope that helps,

Sean

Jon Danniken wrote:
Quote:
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
Back to top
Jon Danniken
Guest
Posted: Tue Nov 08, 2005 3:55 pm    Post subject: Re: Strange resistor nomenclature Reply with quote
Aha, thanks, Sean. Makes perfect sense now.

Jon

"Sean O'Byrne" wrote:
Quote:
6k8 = 6800 Ohms (6.8 kOhms)
4k7 = 4700 Ohms (4.7 kOhms)
3M3 = 3300000 Ohms (3.3 MOhms)


Jon Danniken wrote:
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.


Back to top
JeffM
Guest
Posted: Tue Nov 08, 2005 4:32 pm    Post subject: Re: Strange resistor nomenclature Reply with quote
Quote:
"6K8" or "4K7" ?
Jon Danniken

It started in Europe.
It caught on elsewhere for practical reasons.
http://groups.google.com/group/sci.electronics.design/browse_frm/thread/88afe9eb368a3426/dd51b14f560210e0?q=losing-*-decimal-point+8th-generation-photocopies
Back to top
Don Stauffer
Guest
Posted: Tue Nov 08, 2005 5:35 pm    Post subject: Re: Strange resistor nomenclature Reply with quote
Jon Danniken wrote:
Quote:
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

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.
Back to top
nospam
Guest
Posted: Wed Nov 09, 2005 1:35 am    Post subject: Re: Strange resistor nomenclature Reply with quote
"Jon Danniken" <jonREMOVETHISdanniken@yahoo.com> wrote:

Quote:
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.

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

http://civil.engr.siu.edu/labs/General_Topics/units.htm
Back to top
Tom MacIntyre
Guest
Posted: Thu Nov 10, 2005 1:35 am    Post subject: Re: Strange resistor nomenclature Reply with quote
On Wed, 9 Nov 2005 15:00:36 -0600, "James T. White"
<SPAMjtwhiteGUARD@hal-pc.org> wrote:

Quote:
"nospam" <nospam@nospam.invalid> wrote in message
news:o372n19tkbuntthldssttrig5fnkb79vqa@4ax.com...
"Jon Danniken" <jonREMOVETHISdanniken@yahoo.com> wrote:

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.

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

http://civil.engr.siu.edu/labs/General_Topics/units.htm

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?

A very small part of 7 of games that Nolan Ryan pitched? :-)

Tom
Back to top
3T39
Guest
Posted: Thu Nov 10, 2005 1:35 am    Post subject: Re: Strange resistor nomenclature Reply with quote
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: rubbishrat@hotmail.com
Back to top
James T. White
Guest
Posted: Thu Nov 10, 2005 1:35 am    Post subject: Re: Strange resistor nomenclature Reply with quote
"nospam" <nospam@nospam.invalid> wrote in message
news:o372n19tkbuntthldssttrig5fnkb79vqa@4ax.com...
Quote:
"Jon Danniken" <jonREMOVETHISdanniken@yahoo.com> wrote:

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.

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

http://civil.engr.siu.edu/labs/General_Topics/units.htm

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
Back to top
nospam
Guest
Posted: Thu Nov 10, 2005 1:35 am    Post subject: Re: Strange resistor nomenclature Reply with quote
"James T. White" <SPAMjtwhiteGUARD@hal-pc.org> wrote:

Quote:
You can find a list of SI prefix multipliers and symbols here

http://civil.engr.siu.edu/labs/General_Topics/units.htm

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
http://www.sengpielaudio.com/ConvPrefe.htm

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.
Back to top
CWatters
Guest
Posted: Fri Nov 11, 2005 5:35 pm    Post subject: Re: Strange resistor nomenclature Reply with quote
"Jon Danniken" <jonREMOVETHISdanniken@yahoo.com> wrote in message
news:3tbatpFrvl8kU1@individual.net...
Quote:
Aha, thanks, Sean. Makes perfect sense now.

Jon

"Sean O'Byrne" wrote:
6k8 = 6800 Ohms (6.8 kOhms)
4k7 = 4700 Ohms (4.7 kOhms)
3M3 = 3300000 Ohms (3.3 MOhms)

Its to make sure that the decimal point doesn't get lost when documents are
copied.
Back to top
Boris Mohar
Guest
Posted: Sat Nov 12, 2005 1:35 am    Post subject: Re: Strange resistor nomenclature Reply with quote
On Fri, 11 Nov 2005 17:33:49 GMT, "CWatters" <colin.watters@pandoraBOX.be>
wrote:

Quote:

"Jon Danniken" <jonREMOVETHISdanniken@yahoo.com> wrote in message
news:3tbatpFrvl8kU1@individual.net...
Aha, thanks, Sean. Makes perfect sense now.

Jon

"Sean O'Byrne" wrote:
6k8 = 6800 Ohms (6.8 kOhms)
4k7 = 4700 Ohms (4.7 kOhms)
3M3 = 3300000 Ohms (3.3 MOhms)

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
Back to top
Alan Holt
Guest
Posted: Fri Nov 18, 2005 1:35 am    Post subject: Re: Strange resistor nomenclature Reply with quote
It means 6.8k ohms and 4.7k ohms.
Back to top
 
Post new topic   Reply to topic    Electronics Forum Index -> Electronics General All times are GMT
Page 1 of 1

 
 You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



Home & Living New Topics
Contact Us
Powered by phpBB