what bench heat sinks do you use?

pschlosser · Feb 10, 2013

As I gear up to learn more about harvesting diodes and bench testing them, I'm looking around for ideas for economical heat sinks I can use on my test bench.

a few days ago, I read a thread where someone posted eBay links to a couple of precision clamps for Aixiz models. They looked pretty good, but I cannot locate that thread now. One of the eBay items linked may have looked like the attached photo.

What so you guys find are among the easiest set-ups providing the best cooling? The last thing I want is to cook a newly harvested diode.

awillis2589 · Feb 10, 2013

I know mrcrouse makes a really nice massive labby style heatsink for a good price.

Speedy78 · Feb 10, 2013

Shaft guide

Well I found them on eBay but I cant seem to find that thread either.

awillis2589 · Feb 10, 2013

I don't see these clams giving very much if at all any heatsinking. how long do you plan on testing these diodes? if only for a few seconds these might work but anything outside that It wouldn't be recommended.

Speedy78 · Feb 10, 2013

eBay sinks

Found this on eBay. These look to be better for what you need. Some of these you could easily attach a fan too for extra heat dissipation.

pschlosser · Feb 10, 2013

awillis2589 said:
I don't see these clams giving very much if at all any heatsinking. how long do you plan on testing these diodes? if only for a few seconds these might work but anything outside that It wouldn't be recommended.

You may be right. In the other thread, I thought the poster suggested they worked well for heat-sinking, because they were a good tight fit around the module.

As I power diodes and measure their output with an LPM, I could see myself operating them from 2 to 20 minutes. I think I want a setup that is efficient, in terms of mounting and removing, and one where I do not need to worry about ruining the diode.

I'm only seeking something reasonable, not perfect. If I dump tons of current into a diode, I'm not looking for a system to dissipate 20W of heat energy.

I'm planning on running some 405 and 445 diodes up to see what they can do. I want to make sure they're properly heatsinked before I try.

cheech226 · Feb 10, 2013

i believe one of these might work
DIY Use Universal 5 6mm Laser Diode Host Holder Cooling Housing Fans Full Kits | eBay
it accepts the bare diode into a screw together assembly. i have a couple and found they work well. you could tec it too

awillis2589 · Feb 10, 2013

^ something like this might work well, and the nice thing is you wouldn't need to press the diodes into the modules. the only thing is you would need to be careful when soldering leads onto the didoes because with this setup there isn't a way to solder leads on the diode when its in the holder and having heatsinking when around the diode when applying leads helps protect the diode from to much heat.

pschlosser · Feb 10, 2013

I am prepared to press them into a module. And that's where they will stay unless they're complete rejects. I'm looking for a setup that will keep them cool, but without a bunch of assembly to bench test them.

That is why the clamp in my OP looked so attractive. Just slide them in, clamp them down, and test away. Dare to dream, I guess.

Bob_Boyce · Feb 11, 2013

pschlosser said:
As I gear up to learn more about harvesting diodes and bench testing them, I'm looking around for ideas for economical heat sinks I can use on my test bench.

a few days ago, I read a thread where someone posted eBay links to a couple of precision clamps for Aixiz models. They looked pretty good, but I cannot locate that thread now. One of the eBay items linked may have looked like the attached photo.

What so you guys find are among the easiest set-ups providing the best cooling? The last thing I want is to cook a newly harvested diode.

These are what I use to test 5.6mm and 9mm laser diodes. I made 2 of each. There were no 3.8mm laser diodes out yet when I made these. There are threaded aluminum lens blocks as well for placing in front of the laser diodes in the test fixtures for LPMing.

I machined these on a CNC but the holes were step drilled so that the laser diode flange will sit flush and even. Not really required if you use care in placing the laser diode. I slotted the aluminum and put in screws to tighten the fixtures onto the laser diode for good mechanical/thermal contact. For electrical connection, I made up some plug-on test cables out of high quality TO-18 transistor sockets with gold-plated connections. No soldering required for testing.

Bob

Blord · Feb 11, 2013

I was using this cpu cooler as bench sink but I have now a solid block from Mrcrouse.

awillis2589 · Feb 11, 2013

You know I looked for that thread with mrcrouse heat sink but couldn't find it.

Blord · Feb 11, 2013

awillis2589 said:
You know I looked for that thread with mrcrouse heat sink but couldn't find it.

http://laserpointerforums.com/f39/u...e-heatsinks-labby-testing-tec-15ea-77746.html
:beer:

DTR · Feb 11, 2013

Those ones from Mrcrouse look great. I still use my Maxsink from Flaminpyro but he does not carry them anymore.

http://laserpointerforums.com/f39/maxsink-ultamate-lab-style-hs-50590.html

ARG · Feb 11, 2013

I use the laser pointed at the sensor in this pic (to lazy to retake)

It's a slab of aluminium with a TEC & 100W CPU heatsink ontop. I've added on temperature feedback since the photo

hakzaw1 · Feb 11, 2013

awillis2589 said:
I know mrcrouse makes a really nice massive labby style heatsink for a good price.

Those are what I use- contact mcrouse or buy them at AixiZ.com- they are listed on ebay but go to the home site not aixiz amazon or ebay- mcrouse also has a nicer version that is finned for not very much more.
he also makes custom ordered items to your specs- fast and very pro work - great prices..

two of these are nearly a half pound of Al.

what bench heat sinks do you use?

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