component-valuesrepairresistorstolerance
I have two resistors which need to be replaced. I tried to determine the value, but it can't make sense of these black bands:
For reference the bands are:
Since a silver line can only be part of the multiplier, that means the black line on the right has to be the tolerance. Black can not be used for a tolerance from what I've read.
Is this black line a tolerance value or something else?
The folks at itll.colorado.edu have a resistor chart that includes how to read 6 Band Resistors. You should start with the thick band. You can always test with a Multimeter too!
The first band is never black for the same reason that you always write numbers scientific notation with a single nonzero digit in front of the decimal place (e.g. 6.022e23) - convention. Generally the resistor specifications will all have the same number of nonzero significant digits (2 or 3, depending on the tolerance) except for a couple of values, namely even powers of ten (1, 10, 100, etc) and possibly a few others by coincidence.
Best Answer
I don't think I've ever seen a resistor value with a leading zero (usually those super-low values are marked with the value in numerals), but that's what those appear to be. 0.012\$\Omega\$ 1% and 0.015\$\Omega\$ 1% are what I see (reading from right to left, as Olin suggests, but I think the silver is a multiplier and the brown is the tolerance).
Here's a 0.015\$\Omega\$ 1% resistor (courtesy Digikey):