The 3 first are the value (the last one is the multiplier).

Then, there is the tolerance.

And finally it can exist a 5th one, the thermal drift.


frank a écrit :
Hi all,
sorry for the dumb question, but I'm not finding any good info on the net
it seems. I often see in old (CRT) TV chassis some resistors with
a standard 4 bands code (the 4th is Gold) plus a 5th
band always yellow, for example Brown Black Black Gold Yellow (measures 10
ohms as expected).
What's the meaning of the additional yellow band?
Thanks in advance
Frank