Paper clips as TO-220 heat sinks - Page 2 - diyAudio
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Old 11th June 2009, 04:22 AM   #11
okapi is offline okapi  United States
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can you use a paper clip to hold a coin on?
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Old 11th June 2009, 04:49 AM   #12
tinitus is offline tinitus  Europe
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No point if a coin doesnt work

But you have a good point tho, if the clip is reliable in the long run

I like the idea of using beercan alu
Clamped with a small piece of stable metal
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Old 11th June 2009, 05:31 AM   #13
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I once needed to improve a heatsink, so cut 1/4" aluminum wire on 3" peaces, stuck them between fins of the heatsink, and glued by epoxy. It looked like a hedgehog, but the temperature dropped down significantly.
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Old 11th June 2009, 06:33 AM   #14
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Perhaps coins could give better results if hammered to more smoother and thiner surface. Thats easy. I have done it many times but never considered that it could make a heatsink. Not dure if it is cheaper w.r.t the quality.
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Old 11th June 2009, 06:55 AM   #15
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I've used coins as heatsinks for some small bridge rectifier modules (those little tiny round ones). I just stuck them on with epoxy (JB weld,lol) and they worked great. I even built up a larger finned 'heatsink' with a stack of off-set pennies all epoxied together,much like in the picture. It actually worked quite well!

(Edit: I think the trick to using epoxy,is to use some that is meant for (and contains) metal.It probably has lower thermal resistance?! Just a thought.)
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Old 11th June 2009, 01:31 PM   #16
CBS240 is offline CBS240  United States
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Quote:
Originally posted by cbdb
Ever try pieces of aluminum beer cans? You can cut (with siccors) and bend them to custom sizes and shapes.

To cool a TO-18 transistor. It worked, the trany didn't blow out as it did without the beer-sink.


As for pennies, you need to get some old ones, pre-1980. They are solid copper. The new ones are only plated.

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Old 11th June 2009, 05:45 PM   #17
GPG is offline GPG  United States
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The fastest TO-220 heat sink is a small binder clip. It is much better than a lowly paper clip!

You can also arrange the little levers for the best appearance.
For production, you can even remove the levers to prevent tampering.

Greg
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