What resistor is this?

Answer 1

There are 2 main resistor color code systems in use today: 3 or 4 band for standard resistors and 5 or 6 band for precision resistors. The full coding for multiplier digit, tolerance digit, and temperature coefficient bands is too complicated to fully explain here, as they include several special case exceptions.

Standard resistors:

1. 10s digit
2. 1s digit
3. multiplier digit
4. optional tolerance - no band 20%, silver 10%, gold 5%

Precision resistors:

1. 100s digit
2. 10s digit
3. 1s digit
4. multiplier digit
5. tolerance digit - numeric % from 1% to 5%
6. optional temperature coefficient

Answer 2

The resistor is identified by a colour code. Most common is the 4 band resistor, band values are as follows - Black- 0, Brown - 1, Red - 2, Orange - 3, Yellow - 4, Green - 5 , Blue - 6, Violet - 7, Grey -8, White 9. The 4 th band is the multiplier.If the picture above is headed "Chicago7" then check the colour bands, they are Blue, 6 green 5 , orange 3, indicating a 65 K ohm resistor.