What type resistors are these

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What type resistors are these

Post by herromc on Fri Aug 25, 2017 7:39 pm

Would the long cylindrical resistors (some with a red dot) be considered wire wound resistors?

Mike



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Re: What type resistors are these

Post by Dan Walker on Fri Aug 25, 2017 10:15 pm

Hi Mike.
Yes those are wire wound resistors. You can tell the value of them by using the system B E D which is Body, End, Dot
You start with the chart telling you what each color means.

https://www.google.ca/search?q=resistor+color+chart&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwiR5MXY2_PVAhXmhFQKHYfsDu0QsAQIJQ&biw=1056&bih=481.

I did find it a little complicated at first, but it is not really that hard.
In your photo you have one that has a yellow body and that is 4.
The end is black and that is 0. the dot is red which is 2[meaning two zeros].
it would be 4000 ohms.
I hope this helps you Dan in Calgary

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Re: What type resistors are these

Post by CaptainClock on Sun Aug 27, 2017 6:09 pm

Those are what are commonly referred to as "dogbone" resistors and those hardly ever go bad, the resistors you will want to worry about are the carbon comp resistors (brown with several different color stripes that correspond to the modern resistor color coding system) or any resistors that look burned.

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Re: What type resistors are these

Post by easyrider8 on Tue Aug 29, 2017 5:27 am

Dog Bone resistors drift high, make sure to test all of them.

Dave
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Re: What type resistors are these

Post by Bill Cahill on Tue Aug 29, 2017 10:45 pm

CaptainClock wrote:Those are what are commonly referred to as "dogbone" resistors and those hardly ever go bad, the resistors you will want to worry about are the carbon comp resistors (brown with several different color stripes that correspond to the modern resistor color coding system) or any resistors that look burned.

Some dogbones are still working, but, usually, I find them either one hundred percent high, or, just wide open.
Bill Cahill

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