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resistor wattage?
#1

I got a big load of resistors from someone but the issue is they were all jumbled together with no way to tell the wattage. took me 3 hours to separate them. Is there anything that tells you that a resistor is 1/2 watt or 1 watt etc?

thanks for any help
Kirk

Times I have been electrocuted in 2021
As of 1/01/2021
AC: 4 DC: 1
Last year: 6
#2

Are they old ones or new ones? Something like this could help: http://firetrucksandequipment.tpub.com/T..._217_1.jpg

But it's hard to tell. Each wattage has consistently become physically smaller over the years. Do you have a photo?
#3

Elderly carbon resistors are prone to drift up in ohmage and otherwise may perform oddly whether or not they have ever been used. Can't say I know a good way to test other than an ohm-meter.
#4

As it was mentioned a photo would help because it depends on composition and/or age. When you take the picture include something known to compare size to, like a penny.
#5

You haven't been searching my site. Comparison pics of resistors.

See this: http://philcorepairbench.com/resistcompare.htm

Chuck
#6

Great Chuck,
I have been searching google but came up with nothing on wattage.


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Times I have been electrocuted in 2021
As of 1/01/2021
AC: 4 DC: 1
Last year: 6
#7

http://www.mouser.com/ds/2/303/little_demon-180342.pdf

This is Ohmite datasheet showing similar resistors with sizes.
Might not be exact same but should give you an idea.
#8

The 2 larger ones of the 3 on the left are 1/2w. The rest appear to Be 1/4w
#9

There are new resistors like the one on the right looking like they are 1/4W that are in fact 1W resistors. Just recently used some.
They are of course not carbon type. First time I saw them I did not believe it.




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