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Old 25th August 2009, 12:05 PM   #1
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Default where can I have a custom made heatsink?

Hi folks,

I would like to know if anybody can suggest me a store or whoever can offer a small volume production CNC tooling service.
I need to manufacture a simple heatsink which is small cube with a "pocket" for 8 jfets (TO-92 pack) in line inside.
The cube a little wider, of course, than the jfets and and inside is a juggled task for the 8 jfets which are placed in line same orientation, one by another.
I can supply the drawing in autocad 2004's format.
I only need 4-10 parts for now.
I am googling to see if there is any business who does this small production but I was unable to find any up till now.

Thank you all for your attention.

Any suggestion is very welcomed.

Best.
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Last edited by Stefanoo; 25th August 2009 at 12:08 PM.
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Old 25th August 2009, 12:36 PM   #2
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Default Small CNC heatsink run

Hi

There are many companies here in the UK can can provide this service.

If you would like a quotation then send me your files and I will arrange it.

Obviously the carriage from the UK to Italy will not be cheap nor quick. So if you can find a precision machining company locally it could be faster and cheaper.

Regards
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Old 25th August 2009, 03:25 PM   #3
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Hi Barry,

thank you very much.
if I will order 4 parts it won't be more than 500gr (0.5Kg)
I am not an expert on shipping costs but I don't think it would be more than 10eur (am I wrong?).
Can you just give me a rough idea of how much it would cost?
(if you want you can send me these info at kyokoforever@virgilio.it)

Many thanks.
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Old 25th August 2009, 04:03 PM   #4
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I bolted 11 transistors between a pair of copper strips. It may be an option.
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Old 25th August 2009, 06:10 PM   #5
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11 transistors, TO247, TO220?! right?! but how about a TO92?!

What I am trying to build/having manufactured is a sort of heatsink that wraps around these 9 jfets TO92 and at the same time covers them so that I can control better the thermal drifting.
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Old 25th August 2009, 06:28 PM   #6
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I mean 2SC1815
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Old 25th August 2009, 06:38 PM   #7
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if I am not wrong is should be TO92.

In my board I have the 8 Jfets in vertical line meaning, the curved edge faces the flat face and so on forming thus a juggled shape for the eventual heatsink that will have to wrap them all around.
I can't just use a flat piece of aluminum and join them on.

This has to look good at least decent so trying to improvise a curvy piece of aluminum wouldn't be the type of style i wish for this board.
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Old 25th August 2009, 06:53 PM   #8
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http://www.diyaudio.com/forums/showt...38#post1690438
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Old 25th August 2009, 07:11 PM   #9
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Quote:
Originally Posted by Stefanoo View Post
if I am not wrong is should be TO92.

In my board I have the 8 Jfets in vertical line meaning, the curved edge faces the flat face and so on forming thus a juggled shape for the eventual heatsink that will have to wrap them all around.
I can't just use a flat piece of aluminum and join them on.

This has to look good at least decent so trying to improvise a curvy piece of aluminum wouldn't be the type of style i wish for this board.
The problem is, different cases have different sizes, and they still are called TO92.
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Old 25th August 2009, 10:14 PM   #10
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Quote:
Originally Posted by Peter Daniel View Post
thanks Peter helpful as usual.

I would need something like that but for 8 jfets in line.
I don't have room to fit 4 of them and to re-adjust the layout.
If there is any possibility to make something like that with this rough juggled outline... then great.
I was actually thinking of something simpler, just an aluminum rectangular shape for the outside the jfet's outline milled at the inside.
nothing fancy like that...
i am wondering though, if there is any CNC shop even in the US that makes these things of een fancy things like that .
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