I'm thinking about heat sinks for my next design. I've been looking at plumbing supplies. I think I like 1-1/2" sink drain pipe. It's thin wall and comes in plastic and chrome plated brass. It has a shoulder in it that would be a good mounting spot for a 1-1/2" aluminum disk. Here's my question.
Which is better (both with thermal goop):
1. An aluminum disk mounted in an easy to cut plastic pipe on a shoulder with an LS/O on one side and maybe some fins on the other side of the disk and then a couple of air holes in the pipe near the fins.
2. An aluminum disk mounted in a more difficult to cut and join, heavier metal pipe on a shoulder with an LS/O on one side and smooth on the other side of the disk.
For (1) the heat has a wide path to the air close to the center of the disk.
For (2) the heat has a long thin path to the outside of the metal pipe.
(1) is like a plastic head lamp conversion. How hot does the LS get in those sealed lights?
If I just put a 1-1/2" flat aluminum heat sink disk inside a sealed plastic box, how much current can I pass through an LS/O mounted on the disk and still stay in the warm zone?
Which is better (both with thermal goop):
1. An aluminum disk mounted in an easy to cut plastic pipe on a shoulder with an LS/O on one side and maybe some fins on the other side of the disk and then a couple of air holes in the pipe near the fins.
2. An aluminum disk mounted in a more difficult to cut and join, heavier metal pipe on a shoulder with an LS/O on one side and smooth on the other side of the disk.
For (1) the heat has a wide path to the air close to the center of the disk.
For (2) the heat has a long thin path to the outside of the metal pipe.
(1) is like a plastic head lamp conversion. How hot does the LS get in those sealed lights?
If I just put a 1-1/2" flat aluminum heat sink disk inside a sealed plastic box, how much current can I pass through an LS/O mounted on the disk and still stay in the warm zone?