Resistor Value - Page 1
Forum section: electronics / beginners

author: DarkZero
author_rank: Regular Contributor
timestamp: June 22, 2015, 11:37:35 pm
content: Hello All!i cant determine value of this resistor

author: MarkF
author_rank: Super Contributor
timestamp: June 22, 2015, 11:42:12 pm
content: I would guess it's 260K. Not sure if the first band is red or orange. If orange, it would be 360K.

author: DarkZero
author_rank: Regular Contributor
timestamp: June 22, 2015, 11:47:13 pm
content: whole this time i thought first band is brown now im even more confused.i thought its brown blue (or green) yellow gold yellow but i think that would be into 15ohm something range

author: MarkF
author_rank: Super Contributor
timestamp: June 23, 2015, 02:06:23 am
content: The yellow 3rd band will at a minimum make it 100K.

author: Ian.M
author_rank: Super Contributor
timestamp: June 23, 2015, 02:40:31 am
content: Looks like 160K 5% However 150K 5% is also possible if the second band is actually green rather than blue. The first band is highly unlikely to be red as the 5% E24 series doesn't have any values starting 25 or 26. The fifth band is either temperature stability - which doesn't make sense for an ordinary 5% resistor or reliability or some manufacturer specific code.You can eliminate four band value coding because of the band grouping and because yellow isn't used for any fifth band tolerance.

author: IanB
author_rank: Super Contributor
timestamp: June 23, 2015, 02:55:27 am
content: Quote from: DarkZero on June 22, 2015, 11:37:35 pmDon't futz about guessing the color bands, measure it with a meter.

author: LukeW
author_rank: Frequent Contributor
timestamp: June 23, 2015, 04:07:36 am
content: I read it as 150k. But it's interesting to see how different people have different color interpretation and consider the first band to be red, the second band to be blue etc.

author: Doc38343
author_rank: Contributor
timestamp: June 23, 2015, 04:15:10 am
content: Just curious... what does the yellow band above the gold band mean? Please...

author: bakerts
author_rank: Newbie
timestamp: June 23, 2015, 05:54:37 am
content: Quote from: Doc38343 on June 23, 2015, 04:15:10 amI'm pretty sure that has to do with the voltage coefficient. Yellow translates to 25ppm, which basically means that the resistance will change 1% over a 25V change.If anyone has a more in depth explanation, I'd love to learn more myself.

author: IconicPCB
author_rank: Super Contributor
timestamp: June 23, 2015, 06:42:34 am
content: That's no resistor .. thats a choke.

author: DarkZero
author_rank: Regular Contributor
timestamp: June 23, 2015, 02:35:52 pm
content: part burned out so i cant measure it but when i do it reads 150k if its to believe charred part. guess ill try with 150k

author: Ian.M
author_rank: Super Contributor
timestamp: June 23, 2015, 03:17:40 pm
content: I'd believe your 150K reading. It looks like there was a poor connection from the lead to the end cap and presumably its in a high voltage circuit so it burnt up from the arcing, which shouldn't have changed the value of the element much as that was protected by the end cap.Most types of resistors increase in value or go open circuit as they fail. (The exception is carbon composition resistors which tend to initially decrease in value if overloaded as the resin binder in the composition chars however they are no longer common.) so that makes 160K, and the other higher values suggested above extremely unlikely.You do need to make sure the replacement resistor has an adequate power rating and if it has more than 200V across it, you'll need to get one with a high voltage rating (or use two 75K resistors in series).

author: lapm
author_rank: Frequent Contributor
timestamp: June 23, 2015, 03:24:57 pm
content: http://www.digikey.com/en/resources/conversion-calculators/conversion-calculator-resistor-color-code-5-band