Author Topic: Help with old resistor color code.  (Read 859 times)

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Offline Algojervia

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Help with old resistor color code.
« on: November 02, 2016, 03:47:09 pm »
I can't decide the color on the last band. I see pink or maybe white but it doesn't add up. Anyone that might have experience in how the colors age on these things?
 

Online Ian.M

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Re: Help with old resistor colour code.
« Reply #1 on: November 02, 2016, 04:48:59 pm »
A fifth 'Salmon pink' band after the tolerance band used to be used to indicate high stability resistors.   From the farthest to the nearest 51K 1%, 5.1K 1% and something in the hundreds of ohms range (as we cant see the first two bands), also 1%.
 
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Offline Algojervia

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Re: Help with old resistor color code.
« Reply #2 on: November 02, 2016, 05:13:03 pm »
Thanks, when I google I see some statement that the band only indicate a high grade material but no actually percentage value. Most say that it should be one or two but have a look at the chart close to the top of this page.
http://www.mds975.co.uk/Content/components01.html
What's up with that?
 

Online Ian.M

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Re: Help with old resistor color code.
« Reply #3 on: November 02, 2016, 05:18:20 pm »
Yes. The brown fourth band indicates the 1% tolerance.
The page you linked shows pink fourth band as 20% tolerance - that would be extremely rare as it was more usual to have NO fourth band for 20%
 
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