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Old 06-15-2007, 12:48 PM #1
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Default Heatsink for 100% duty cycle

I turned my heatsink up today at work for my 100mw red Module. I made it out of 2" Ally bar and added some fins along the length to give a greater surface area for heat Dissipation. It is not a transition or press fit but rather a "snug" fit, so I can remove the diode without damaging it. It seems to work really well, I did a 2 hour test run and removed the diode. It wasn't even warm 8-)

Here is a picture or 2

Jase.

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Old 06-15-2007, 12:52 PM #2
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Default Re: Heatsink for 100% duty cycle

Very nice ! I may ask you to turn one out for me soon :-) Since I stumbled across the great deal on the portable reds, nobody is interested in the labby models now :-) !!! I plan on making a permanent enclosure for the power supply soon....excellent work !
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Old 06-15-2007, 12:54 PM #3
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Default Re: Heatsink for 100% duty cycle

And another.

Jase
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Old 06-15-2007, 02:42 PM #4
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Default Re: Heatsink for 100% duty cycle

Sure thing Greg. Ill spin you one up. I plan on making one for my 35mw wicked Greenie, to see if I can make that 100% duty cycle too.

Jase
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Old 06-15-2007, 04:10 PM #5
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Default Re: Heatsink for 100% duty cycle

Quote:
Originally Posted by Tallaxo
Sure thing Greg. Ill spin you one up. I plan on making one for my 35mw wicked Greenie, to see if I can make that 100% duty cycle too.

Jase
Let me know how that plan goes Jason and I'll ask you if you could turn one out for my viper 8-)
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Old 06-15-2007, 04:14 PM #6
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Default Re: Heatsink for 100% duty cycle

Shipping for Lee would be considerably less than it is for me ! LOL !!!

I apppreciate it, Jase - I look forward to getting it :-)
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Old 06-15-2007, 04:23 PM #7
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Default Re: Heatsink for 100% duty cycle

Quote:
Originally Posted by SenKat
Shipping for Lee would be considerably less than it is for me ! LOL !!!

I apppreciate it, Jase - I look forward to getting it :-)
It would only cost about 7-10 depending on the weight to Texas
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Old 06-15-2007, 04:36 PM #8
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Default Re: Heatsink for 100% duty cycle

Quote:
Originally Posted by Timelord
[quote author=Tallaxo link=1181911752/0#3 date=1181918557]Sure thing Greg. Ill spin you one up. I plan on making one for my 35mw wicked Greenie, to see if I can make that 100% duty cycle too.

Jase
Let me know how that plan goes Jason and I'll ask you if you could turn one out for my viper 8-) [/quote]
Sure thing Lee

Jase
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Old 06-15-2007, 04:57 PM #9
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Default Re: Heatsink for 100% duty cycle

I've got a plug of aluminum that my father just gave me and was looking at making some spacers/heatsinks/ for the modules we are using for the DIY reds. If i shipped you the rod of aluminum can you do the same thing in metric specs?
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Old 06-15-2007, 05:02 PM #10
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Default Re: Heatsink for 100% duty cycle

Betcha that thing would work even better if those fins went down a bit more. Increase the amount of surface area on the outside surface and it's heat dissapating will increase. I've got a Zalman cooler for my Processor that is one huge assembly of super fine fins.
http://www.newegg.com/Product/ShowIm...tsink+-+Retail

Are you doing this on a metal lathe? God I so want one of those. wonder how much they cost.
Off a searchin I go.
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Old 06-15-2007, 05:26 PM #11
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Default Re: Heatsink for 100% duty cycle

Using a Colchester Mascot , yep I can make the fins smaller and deeper , but I went for mass over surface area. The diode I made it for is in a heavy 18mm solid brass can. This was a first attempt at Turning a heatsink, so I went for simplicity, rather than overkill. The diode is stone cold after 2 hours running so I guess it works ok.

Will send you a PM soon Ken.

Jase
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Old 06-25-2007, 08:00 AM #12
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Default Re: Heatsink for 100% duty cycle

Top man Jason the heatsink has arrived today so I'll be playing with the viper later on It fits like a glove too
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Old 06-25-2007, 08:37 AM #13
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Default Re: Heatsink for 100% duty cycle

Well, Lee- THEORHETICALLY you got yours first, but since it is today here, too, and hte mail hasn't run yet, we'll have to wait and see ! LOL ! I am chomping at the bit to get my mail today !!! 8-) 8-)
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Old 06-25-2007, 07:45 PM #14
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Default Re: Heatsink for 100% duty cycle

I've tested the heatsink with brand new lithiums and my 125mw DL Viper I used the batteries until they died. The laser did not get warm at all and is still working like new. The output during the test held steady at 120mw after it's initial burst of 135mw, this sat at 135mw-130mw for half an hour then dipped to 120mw for most of the test. The batteries lasted about 2 hours.

Fantastic job Jason
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Old 06-25-2007, 08:06 PM #15
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Default Re: Heatsink for 100% duty cycle

Yay that is Great news, Thanks for testing that for me Lee ;D ;D

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Old 06-25-2007, 08:15 PM #16
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Default Re: Heatsink for 100% duty cycle

The pleasure is all mine mate thank you very much
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