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RE: Would you mind...

If you are dissipating 13 watts, wether you use a resistor rated for 25 watts or one rated for 50 watts you are going to create 13 watts of heat. The difference is in the area used to dissipate that heat, correct? In the case of a larger resistor, the heat is spread over a larger area.

I'm guessing that if no air flow is provided, given enough time the 50 watt resistor will get as hot as the 25 watt resistor (asuuming the same power).

I've been amazed at the small size of modern Kiwame 2 watt carbon film resistors, as compared to the carbon resistors of 30 years ago with the same power rating. But these little buggers get HOT!! No touchy.


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