Inductor marking 8R2K

[David Harmon]

Once again the component marking question.
Some little dipped inductors marked "8R2K"
Is it possible to tell the inductance from that?
Or any other properties?
Photo: http://tinypic.com/ixrzwz.jpg

 

[Mike Harrison]

On Wed, 21 Dec 2005 18:14:10 GMT, David Harmon <source@netcom.com> wrote:

Once again the component marking question.
Some little dipped inductors marked "8R2K"
Is it possible to tell the inductance from that?
Or any other properties?
Photo: http://tinypic.com/ixrzwz.jpg

Probably 8.2 microhenries

 

[David Harmon]

On Wed, 21 Dec 2005 18:17:47 GMT in sci.electronics.components, Mike
Harrison <mike@whitewing.co.uk> wrote,

On Wed, 21 Dec 2005 18:14:10 GMT, David Harmon <source@netcom.com> wrote:

Once again the component marking question.
Some little dipped inductors marked "8R2K"
Is it possible to tell the inductance from that?
Or any other properties?
Photo: http://tinypic.com/ixrzwz.jpg

Probably 8.2 microhenries

Thanks. Does the 'R' or the 'K' mean anything?

 

[Fred Abse]

On Wed, 21 Dec 2005 18:53:54 +0000, David Harmon wrote:

On Wed, 21 Dec 2005 18:17:47 GMT in sci.electronics.components, Mike
Harrison <mike@whitewing.co.uk> wrote,
On Wed, 21 Dec 2005 18:14:10 GMT, David Harmon <source@netcom.com> wrote:

Once again the component marking question. Some little dipped inductors
marked "8R2K" Is it possible to tell the inductance from that? Or any
other properties?
Photo: http://tinypic.com/ixrzwz.jpg

Probably 8.2 microhenries

Thanks. Does the 'R' or the 'K' mean anything?

The "R" is the decimal point:

8R2 = 8,2
R82 = 0.82

Resistors quoted in ohms, inductors in microhenries, capacitors in
picofarads

The "K" is tolerance;

F - +/-1%
G = +/-2%
J = +/-5%
K = +/-10%
M = +/-20%

Pretty standard component marking these days.

Watch out for things like "R82K". At a first glance you think "82K ohms".
It's not, it's 0.82 ohms, 10%

--
"Electricity is of two kinds, positive and negative. The difference
is, I presume, that one comes a little more expensive, but is more
durable; the other is a cheaper thing, but the moths get into it."
(Stephen Leacock)