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Old 26th March 2006, 08:45 PM   #1
JCM is offline JCM  United States
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Default diy heatsink

DIY Heatsink article.

2 Watt Monstrosity. Source-follower with BoZ / LC tone control, and additional mosfet gain stage as compensation.
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Old 26th March 2006, 11:45 PM   #2
JCM is offline JCM  United States
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The pic I included was just an experiment to see if I could upload files - and I see it worked. Has nothing to do with the heatsink article.

Seems to me it ought to be possible to build your own heatsink. I'm probably going to visit my local scrapyard soon. Aluminum brackets and so forth are not hard to come by.

In the amp I plan, the heatsink requirements are as modest as the power output. I only need to dissipate about 40 watts per sink, maximum.

85 degree Centigrade computer grade capacitors, or 105 degree C snap-lock ? I can get Sprague Powerlytics for only a little bit more than the smaller types.

Here is my preamp (one guess where I got the idea from) :
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Old 27th March 2006, 03:14 AM   #3
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Default That massive black chassis is mine!

Funny, I built that big, dark fellow quite awhile back and now it's pulling its weight on my ZV7-T that I've mentioned in a recent thread. Like I said in the thread, it barely gets warm...

Labor intensive as hell-o but what a blast when it's finished. I spent maybe fifty dollars on that chassis. It helps to have a cousin in the anodizing business.

Be sure to follow the little hints, they'll help.

All the best,

John Inlow
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Old 27th March 2006, 04:52 AM   #4
JCM is offline JCM  United States
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Join Date: Dec 2005
Location: Kansas USA
The heat sink barely gets warm ? Meaning, it is exchanging heat so efficiently to the surrounding air that it doesn't get hot. As
dense and heavy as these things are, the way they were described, I would think they would work pretty well. Further validation, per your experience, bodes well, I think.

I looked at the posts in a heatsink thread, some interesting ideas were exchanged. One of them, which was like a splayed open book, seemed like a good design.

N.P. provided a photo of one of his - pretty straightforward, U-shaped brackets bolted to a heavy flat piece of metal.
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