LARGE Heatsinks, What would you do with them??

[PartialDischarge]

Hi,

In my company I've come across a huge pile of nice heatsinks that will probably end up in the trash . So I've started thinking about any possible uses for them, be it
electronics related (a massive LED heatsink...) or even artistic uses (a futuristic table top...).
Selling them is not easy since weight makes shipping pricey

What would you do with those ? any creative ideas?

Cheers!

[Augustus]

Selling them is not easy since weight makes shipping pricey

Take them to hamfests, these make nice heatsinks for homemade transistor rf power amplifiers... 

[nctnico]

I really wouldn't mind buying a couple of those if the price is right... I have a few projects in mind for which I really could use such heatsinks.

[mav_iqdirect]

Cool stuff
Formerly I saw up similar ones to smaller pieces to use in my hobby projects.

[Johnny10]

I would put 200 watt 8 ohm resistors on them and use for audio Load.

Very Cool!

Pick them all up.
Lots of uses.
Too bad you are so far away...

[German_EE]

DC dummy load, a REALLY BIG DC dummy load.

Selling them to radio hams is a better idea though.

[iampoor]

Dummy load all the way!

I wish I could find a nice pile of heatsinks like that!

[stmdude]

Mount _lots_ of power-LEDs on them to make a spotlight bright enough to light up the moon.

[M4trix]

Mastertech, the question is, what is your field of interest ? Personally, I would build powerful dummy loads for testing high power audio amplifiers and sell them. 

[T3sl4co1l]

Big power supplies, like motor drives / VFDs, industrial heating, etc.

Tim

[AF6LJ]

Great heaatsinks for 8560 based power amplifier.
Just have to get the beryllium oxide thermal link welded to them.
Here is an 8560 datasheet. [url]https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwiuuN-sttrMAhVJ02MKHQq8B0kQFggjMAE&url=http%3A%2F%2Fwww.tubecollectors.org%2Feimac%2Farchives%2F8560as.pdf&usg=AFQjCNFh5D19RlApJz9X5Ki8-eUYGH8jIA&sig2=XUsvmZ5_VMXvZR5VFWNRBg&bvm=bv.122129774,d.cGc]https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwiuuN-sttrMAhVJ02MKHQq8B0kQFggjMAE&url=http%3A%2F%2Fwww.tubecollectors.org%2Feimac%2Farchives%2F8560as.pdf&usg=AFQjCNFh5D19RlApJz9X5Ki8-eUYGH8jIA&sig2=XUsvmZ5_VMXvZR5VFWNRBg&bvm=bv.122129774,d.cGc] [url]https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwiuuN-sttrMAhVJ02MKHQq8B0kQFggjMAE&url=http%3A%2F%2Fwww.tubecollectors.org%2Feimac%2Farchives%2F8560as.pdf&usg=AFQjCNFh5D19RlApJz9X5Ki8-eUYGH8jIA&sig2=XUsvmZ5_VMXvZR5VFWNRBg&bvm=bv.122129774,d.cGc[/url]

I only mention this because I have a half dozen of these tubes.

[10101]

1000A electronic load just for the lols xD

[wkb]

HAM PAs & dummy loads! Not something I would 'thrash' ever 

[XOIIO]

Holy crap, I've got some pretty long ones, but those are probably way more metal, and will definitely dissipate heat better. I'll take some pics of them later.

[Psi]

Time to buy 20x  100W LEDs from aliexpress

[AF6LJ]

Time to buy 20x  100W LEDs from aliexpress

Just what everyone needs a ceiling light that is brighter than the Sun. 

[M4trix]

Btw, how much does one heat sink weigh ? Since Spain is not far from here, I'm curious how much would shipping cost from Spain to Croatia. 

[TerraHertz]

In my company I've come across a huge pile of nice heatsinks that will probably end up in the trash .

Wow. If you can arrange to take them, rather than the company trashing them, then you definitely should take them all.
Because despite the shipping cost I think they would sell well via the usual channels.
Also, think recycling metal value. If the company doesn't want to bother taking them to recycling, why don't you?

Another use: small optical table for DIY laser projectors and such. It looks like the back surface is machined flat, already has lots of tapped holes. and it's also going to be a good heatsink oddly enough.

[sarepairman2]

you can also smelt them or just sell them for cash on ebay or just scrap them. Kind of a waste to throw out aluminum metal... its recyclable. Not the mot pricey metal but if you got alot of it you can buy yourself a few sandwiches.

There are a few cool youtube videos with people making ridiclous LED flashlights too..

I would save one or two and scrap/sell the rest unless you got free space or a serious liking of power electronics. You can probobly finance your project with that sale. Maybe sell them on the forum lol

[Ampera]

Here are thirty really stupid uses for them

1. Grating cheese

2. Use as a pet deterrent to keep cats and other pets off surfaces (Cats hate those kinds of surfaces)

3. Make it into a frying pan with REALLY good heat transfer

4. If you have enough of them, mount them on you wall, heck they might make good echo canceling surfaces

5. Use it for a really big space heater

6. Use it for a really big pool warmer

7. Cut them up and save them for DIY projects (Or just plop a bunch off at a makerspace, they will take it)

8. Stare at them

9. Use them a chair for people who you really don't like to sit on.

10. Use it to separate cheese curd from whey.

11. Glue it to a stick and use it as a meat tenderizer.

12. Use it as catapult ammo

13. Put a trapdoor in your front porch with these at the bottom so you can mildly irritate and entrap troublesome door to door sales people.

14. Spend way too much money and send it to the EEVBlog in one massive package just so Dave can wonder why you wasted money and time to send them over

15. Get a nice torch and forge them into metal tools

16. Make a footrest

17. Cast them into slightly larger heatsinks

18. Use them to shave your pubic regions

19. If you have a LOT of them put brick to mortar and make a heatsink wall/house.

20. Use them for computers

21. Make a bed out of them

22. Walk up to people in the supermarket and put one into their carts.

23. Use it to crush fruit and veg.

24. Keep boiling until soft, then eat them.

25. Powderize them and make sparklers.

26. Absolutely nothing

27. Take a potato and push it through the waves to make fries/chips

28. Use it to decorate your car

29. Hide them under the floorboards to really confuse someone whenever it is found

30. Make the ultimate water cooling system for a computer.

[M4trix]

Time to buy 20x  100W LEDs from aliexpress

Just what everyone needs a ceiling light that is brighter than the Sun. 

[Brumby]

Just how many of these are there?

There is a lot of metal there - they are huge... I love them!!

You could cut them down for a number of smaller ones ... I would hate to see any scrapped.  If I couldn't sell them, I would rather give them away to people who could use them, rather than have them melted down.


I'd hate to have paid the bill for their original purchase......

[Smokey]

You guys are way low-balling the dissipation capabilities of those heatsinks.  Those are around 1500W heatsinks with proper airflow.  Think Bigger!

[Brumby]

Three Mile Island...?  Fukushima.....?  Chernobyl........?

[bitseeker]

Passively cooled, multi-channel, high-current, linear power supply and electronic load. One heatsink per channel.

One should be pretty good for passively cooling a CPU and GPU, too.

Fans? We don't need no stinkin' fans!

[radar_macgyver]

Sandwich some peltier elements between two, add some fans and you have a solid-state air conditioner. Suitable for cooling enclosures and such. Enough of them would act as a room cooler, but won't be very efficient. Run in reverse, they'd be good for heat pumps.

[T3sl4co1l]

Sandwich some peltier elements between two, add some fans and you have a solid-state air conditioner. Suitable for cooling enclosures and such. Enough of them would act as a room cooler, but won't be very efficient. Run in reverse, they'd be good for heat pumps.

World's lowest SEER!

Tim

[XOIIO]

Yeah, mine aren't nearly as impressive.

[continuo]

Wow... What would be a reasonable selling price for one of these huge heatsinks? 30...50€? And how many of them do they stock there? Grab them... Grab all of them... 

[Jeroen3]

€50? You are kidding?
These go around for more than €100. They are high performance cooling aggregates.
You have to ask the price, that's how expensive they are. You don't just scrap those, you return or resell then.
Looking at how much you have over there, you are taking about 5 digit prices. And multiple digit shipping...

Looks like you've scrapped the project to build your own VFD or super rectifier.
There is one price lowering factor... they are pre-drilled.

[apis]

Yeah, sell them if you don't need them!
Or give them to people who do, they will be grateful!

[Nuno_pt]

I would need 3 or 4 if the price is right, since Spain is on the corner.

I'm thinking 144, 432 and 1296 RF amplifiers, and 1 HF 5kW dummy load. 

[radar_macgyver]

World's lowest SEER!

SEER is not everything. We use these guys' products at work to good effect. Perfect for enclosures where heat loads are variable, and you can't get variable capacity compressors small enough to avoid short-cycling. Also good for enclosures that operate off-vertical.

[PartialDischarge]

Some good ideas out there... the DC load definitively takes the lead! and actually there are also a lot of igbt modules here (>1000V >1000A  ) that fit those heatsinks and
could serve that purpose...

And yes, those are highly efficient heatsinks given the proper airflow. There are actually 2 sizes in the pictures, the bigger one weights like 13kg if I remember well !!!...

[sarepairman2]

thermoelectrics are great when you need them.

[German_EE]

Please could someone explain what SEER is? I can find plenty of information at https://en.wikipedia.org/wiki/Seer but none of it is to do with electronics.

[T3sl4co1l]

Please could someone explain what SEER is? I can find plenty of information at https://en.wikipedia.org/wiki/Seer but none of it is to do with electronics.

I was referring to the "room cooler" part.  That definition is,
https://en.wikipedia.org/wiki/Seasonal_energy_efficiency_ratio

TECs are okay when you need the teeniest amount of heat flow to get a regulated temperature difference (usually cooler, and sometimes stacked to achieve much lower temperatures... at the cost of exponential power consumption..!).  I can't imagine a case where you'd actually want to put in a room-sized one.

Ed: or more to the point... that you'd want to put in, and pay for the installation and operating costs of...

Tim

[CatalinaWOW]

Active loads for battery characterization.  Big batteries like those used in giant scale RC airplane flight or electric drag racing and so on.

[iXod]

Make these:



1800 watts (162,000 lumens).

Cheers.

[TerraHertz]

Some good ideas out there... the DC load definitively takes the lead! and actually there are also a lot of igbt modules here (>1000V >1000A  ) that fit those heatsinks and
could serve that purpose...

And yes, those are highly efficient heatsinks given the proper airflow. There are actually 2 sizes in the pictures, the bigger one weights like 13kg if I remember well !!!...

Wait, you have huge pre-drilled heatsinks AND giant igbts that fit them? Are the igbt's 'surplus to requirements' too?
OK, seriously, can you find some specs for the heatinks and igbts? Either post or PM them, or even URLs for them?
I'd definitely be interested in buying some sets if cheap. Though I'd probably have to save up for the shipping.
For some experiments related to a power independence project idea.

Though, I suspect ">1000A IGBTs" are probably overkill. By more than an order of magnitude.

[DimitriP]

Hmmmm .....

[bitseeker]

Sweet!

Doubles as a drink warmer.

[Raj]

if you can't decide what to do with them... melt them and cast them into something useful
or cut them for use in smaller devices

[ZeTeX]

Here are thirty really stupid uses for them

1. Grating cheese

2. Use as a pet deterrent to keep cats and other pets off surfaces (Cats hate those kinds of surfaces)

3. Make it into a frying pan with REALLY good heat transfer

4. If you have enough of them, mount them on you wall, heck they might make good echo canceling surfaces

5. Use it for a really big space heater

6. Use it for a really big pool warmer

7. Cut them up and save them for DIY projects (Or just plop a bunch off at a makerspace, they will take it)

8. Stare at them

9. Use them a chair for people who you really don't like to sit on.

10. Use it to separate cheese curd from whey.

11. Glue it to a stick and use it as a meat tenderizer.

12. Use it as catapult ammo

13. Put a trapdoor in your front porch with these at the bottom so you can mildly irritate and entrap troublesome door to door sales people.

14. Spend way too much money and send it to the EEVBlog in one massive package just so Dave can wonder why you wasted money and time to send them over

15. Get a nice torch and forge them into metal tools

16. Make a footrest

17. Cast them into slightly larger heatsinks

18. Use them to shave your pubic regions

19. If you have a LOT of them put brick to mortar and make a heatsink wall/house.

20. Use them for computers

21. Make a bed out of them

22. Walk up to people in the supermarket and put one into their carts.

23. Use it to crush fruit and veg.

24. Keep boiling until soft, then eat them.

25. Powderize them and make sparklers.

26. Absolutely nothing

27. Take a potato and push it through the waves to make fries/chips

28. Use it to decorate your car

29. Hide them under the floorboards to really confuse someone whenever it is found

30. Make the ultimate water cooling system for a computer.

oh my
"24. Keep boiling until soft, then eat them."
only in russia.