Got this here heatsink...

So I went scrapping today, and found a stereo amplifier heatsink on my adventures. It is black aluminum, 8 inches long, 4 and 3/4 inches wide, with a 1/4 inch thick faceplate and 1 inch fins. How many watts of cobs can I run safely with 2 120mm PC fans on it?

maybe 30w
https://www.allaboutcircuits.com/tools/heat-sink-calculator/
try this link

VegasWinner said:

maybe 30w
https://www.allaboutcircuits.com/tools/heat-sink-calculator/
try this link

Click to expand...

Thanks alot! Appreciate the link.

Most likely you are looking for a c/w of 5.9 for 50w performance with area needed by calcs

I want to run 200 watts, so I guess I will need 3 more, or a larger one. If I tig weld 4 of them together it should do the trick right?