ehsjr
Guest
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 Posted:
Sat Dec 10, 2005 1:35 am Post subject:
Re: Light blue resistors with 5 band codes? |
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Pooh Bear wrote:
| Quote: |
Rich Grise wrote:
On Wed, 07 Dec 2005 23:38:48 +0000, Pooh Bear wrote:
royalmp2001 wrote:
Hi everyone,
What are the light blue resistors? Metal film maybe? I have some with
bands:
Brown - Green - Black - Red - Brown that read 15K on my ohmmeter. The
fourth band confuses me - it is definitely red not orange - any ideas
why?
Oh, and there is a red spot that joins the red and the brown.
Similarly I have some 8.25K resistors that are: Grey - Red - Green -
Brown - Brown with a red dot joining the two browns.
I'd expect the fourth band to be red not brown.
Resistors with 4 bands don't use the same multiplier as those with 3 bands
'cos there's an extra digit provided by the extra band.
I want to bring up semantics here. What do you mean by "the same
multiplier"? It still is "the number of zeros after the other digits",
isn't it? But it'll be one less than the 5% Rs, because of the other
digit. For example, a 22K 5% would be red, red, orange, <whatever the
5% color is>, and a 22K 1% would be red, red, black, red, <apparently
brown for 1%>.
So the properties of the multiplier are the same, it's just not the same
numeric value because of the additional digit.
That's what you meant, right? :-)
Yup ! :-)
As in you might expect to see an orange band multiplier for a 47k but instead
it's red.
Graham
Grumble. On the blue resistors I can't tell the difference between |
the colors, patricularly brown, red and orange. :-(
Ed
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Rich Grise
Guest
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| Posted:
Sun Dec 11, 2005 1:35 am Post subject:
Re: Light blue resistors with 5 band codes? |
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On Sat, 10 Dec 2005 00:07:10 +0000, ehsjr wrote:
| Quote: | Pooh Bear wrote:
Rich Grise wrote:
On Wed, 07 Dec 2005 23:38:48 +0000, Pooh Bear wrote:
royalmp2001 wrote:
Hi everyone,
What are the light blue resistors? Metal film maybe? I have some with
bands:
Brown - Green - Black - Red - Brown that read 15K on my ohmmeter. The
fourth band confuses me - it is definitely red not orange - any ideas
why?
Oh, and there is a red spot that joins the red and the brown.
Similarly I have some 8.25K resistors that are: Grey - Red - Green -
Brown - Brown with a red dot joining the two browns.
I'd expect the fourth band to be red not brown.
Resistors with 4 bands don't use the same multiplier as those with 3 bands
'cos there's an extra digit provided by the extra band.
I want to bring up semantics here. What do you mean by "the same
multiplier"? It still is "the number of zeros after the other digits",
isn't it? But it'll be one less than the 5% Rs, because of the other
digit. For example, a 22K 5% would be red, red, orange, <whatever the
5% color is>, and a 22K 1% would be red, red, black, red, <apparently
brown for 1%>.
So the properties of the multiplier are the same, it's just not the same
numeric value because of the additional digit.
That's what you meant, right? :-)
Yup ! :-)
As in you might expect to see an orange band multiplier for a 47k but instead
it's red.
Grumble. On the blue resistors I can't tell the difference between
the colors, patricularly brown, red and orange. :-(
Ed
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If it's not a color-blindness issue, I've found that a 3X RS magnifying
glass is very, very helpful. Our color receptors don't really have
that fine of a resolution, but if the item is big enough to hit more
than one or two cone cells, it should clear right up. :-)
Good Luck!
Rich |
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