EEVblog Electronics Community Forum
Electronics => Repair => Topic started by: Pscylo on June 05, 2015, 10:46:54 am
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May have been better of in beginners, but since it's an attempted repair (not critical equipment just to see if I can), I thought I would ask here.
The attached is ostensibly a resistor (not seen a green one that I can remember, but still, marked as R "something" on the board). MM shows it as low resistance, but I can't make much sense of the colour bands. The first and last are either white or grey (or one white one grey etc), the middle are red, silver and gold. I can't seem to match this up to the various charts available for resistors (or for axial inductors for that matter). For resistors, I can't position gold and sivler as adjacent bands in those positions and for inductors, five band would indicate military standard and require silver to start which I don't have.
Anyway, I'm guessing I'm being dim, so would appreciate some assistance.
Thanks.
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0.91 ohm, 5%. This is 3 band value marking. 4th band is tolerance. 5th band is manufacturer specific, could mean resistor type and some other things.
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.92 ohms 5%
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If you consider the first band to be grey rather than white you would have 0.82 - which is a preferred value.
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.92 ohms 5%
Such (standard) value does not exist.
If you consider the first band to be grey rather than white you would have 0.82 - which is a preferred value.
From the picture, for me first band looks almost certainly white, second band is obviously brown, not red unless I'm daltonic.
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1.8 Ohms fusible
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From the picture, for me first band looks almost certainly white, second band is obviously brown, not red unless I'm daltonic.
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Second band could indeed be brown, but the white/grey issue is less clear cut. They certainly appear to be different colours at each end of the component dending on orientation and thickness of paint; if it weren't for that perceived difference and the presence of two bands of a similar coilour I would probably book either one as white individually. Either way I guess I know it's around 0.82 to 0.92 which is precise enough I think. My meter makes it 1.1Ohm though I don't know how accurate the meter is.
Thanks all.
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but the white/grey issue is less clear cut.
Grey bands on resistors are much darker. Not some kind of light grey.