In Reply to: RE: Would you mind... posted by timp on September 17, 2012 at 20:50:48:
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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Follow Ups
- RE: Would you mind... - mikeyb 09/18/1206:05:52 09/18/12 (4)
- RE: Would you mind... - wheezer 08:44:05 09/18/12 (3)
- RE: Would you mind... - tube wrangler 20:48:51 09/18/12 (2)
- RE: Would you mind... - wheezer 05:27:42 09/19/12 (0)
- RE: Would you mind... - Triode_Kingdom 21:22:57 09/18/12 (0)