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Makers and Making: Mother of all heat sinks ...
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Jun 20th 2006
So, the title of the eBay auction was "large rectifier", and sure enough the photo showed a couple of what appeared to be large heatsinks with stud diodes inbetween them. Opening bid was $0.99, and the seller is near my house (a clearance business that moves thousands of ebay lots per day) so I wouldn't have to pay shipping. I bid $1.00, and won it.

I went to pick it and a dozen other lots up last friday. The girl rolled out my other lots and asked if I'd mind going back in their warehouse and getting the rectifier myself. Well, I could lift it, but i couldn't carry it any distance!!

To make a long story short, the thing is about 4 times as large as I guessed looking at the pictures. It's about 18" by 12" by 10, and easily weighs in around a hundred pounds!

So, the question is: I have no earthly use for the thing, and while turning a $1 ebay lot into $58 at the aluminium scrap yard is an attractive option, I'd hate to see the thing melted down when there may be someone out there that could use it.

Any ideas?

Thanks, John
Jun 20th 2006
Any pictures? Maybe a link to the auction if it had pics?
Jun 20th 2006
Sure ... I just put it up on my blog ...

http://www.hackersbench.com/

John
Jun 21st 2006
Might make a cool end table put a glass top on it
Jun 21st 2006
I dont know if your into computer modding at all (I guess you've dabbled in it atleast from the banner on your blog) but it looks liek the top two heatsinks come off. they look like they would be nice as passive coolers for a powersuply and CPU :D
Jun 21st 2006
To me, it looks like a fun source of aluminum for casting. You really only need a crucible, some aluminum, and a propane forge, plus the casting sand and whatever forms you are going to use. In a pinch, you can use the leg from a pot-bellied stove as a crucible.

Melting aluminum to make your own cast items is FUN!
Jun 21st 2006
Can you find some cheap/surplus peltier devices? Sandwich them between the heatsinks, and make one side hot and the other cold - (almost) free power!
Jun 21st 2006
it's 14"x10"x10" and a microATX mobo is just under 10"x10"

you need pull those diodes out of there, stick in a mobo and call it a casemod.

I can just see the cd-tray sliding out of the gap between heatsinks.
Jun 21st 2006
Make a fast, yet fanless computer.
Jun 21st 2006
Who is the seller and where are they located?
Jun 22nd 2006
There are many people who need huge heatsinks to build type A audio amplifiers. You can check out some of their stuff at http://www.diyaudio.com and http://www.passdiy.com. On diyaudio, there is a trading post where you could probably sell this thing for $$$$..
Jun 22nd 2006
if you take it apart, and put an aluminum sheet on top of one, you could use it to quickly defrost meats.... it'l act as a cold sink too.
Jun 22nd 2006
Man, since my original post made the MAKE blog, my website is getting hammered and emails are piling in. Cool. :-)

By the way, Amorris, it isn't for sale (yet?), and I'm near Phoenix, AZ.

John
Jun 22nd 2006
why not make a super computer power suply (by using recicled computers) to calculate Pi?
(if you need a OS then here: http://www.flashmobcomputing.org)
Jun 30th 2006
dissasemmble and replace rectifier with peltier junctions.
use solar panel to power it. and mount it in a window

then you have a very effecient and silent air condioner that will run when the sun is brightest.

or use a 10:1 transformer and rectifier to convert house current to power the peltier junctions.
Jun 30th 2006
If you live near a river or flowing water you could modify that to create a heat pump for your water supply to save on heating bills. Technically.
Nov 15th 2007
You could build a wind turbine and use the rectifier to convert the signal from DC to AC (or is it the other way around?). Hugh Piggott at http://www.scoraigwind.com/ has some good instructions.
Nov 16th 2007
Hey, I work for Circuit City (don't flame me!), but I thought you might be interested in a sale (you can’t get in the stores) coming up this Sunday. I thought I would give a heads up early because stock will be limited. Skip the Friday madness and go to the website this Sunday through Wednesday.


There are going to be daily special deals only on the web starting Sunday. The deals just last through Wednesday, and I know their stock will be limited so check it out at www.circuitcity.com/countdown starting this Sunday.
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