OK, since at work we've been pulling old PII 400 mhz computers, I desided to pull a couple of the CPU heatinks for use with my gainclone. Well, in tearing apart a PII processor, low and behold the aluminum plate in it as small posts, and chip clamps for holding it together. That means, a simple PROVEN method of mounting the chips, that, if you have access to, is almost nothnig in cost, (or in my case free!) I'll be snapping a couple pics tonight and posting them so you can see what I'm refering to.
The heatsinks like those also have more surface area for cooling per unit volume and, are cheap. 😉 I find them excellent for mounting many non-through-hole devices that need cooling.
What about these?
That's a good idea, but when firing up my gainclone today (not heatsunk yet), it got super hot during the max power testing. I think I got 25V p-p into 5 ohms with an LM3886. (My scope is out of cal and I only did it quickly)
Good thing I'm going to heatsink these puppies. These are sweet heatsinks for a gainclone, and only cost $2.98, and are what I bought and are what I am going to use.
See:
http://sales.goldmine-elec.com/prodinfo.asp?prodid=3547
Quote:
Super Large Heat Sink - G2209
Black anodized aluminum heat sink type HS10198 measures 4 7/8"L x 2 3/16"W x 1 1/4"Tall. Features 4 mounting holes and a large quantity of fins for efficient cooling.
I bought 2, these are nice, look new. The only problem is that they have 2 little pegs on the flat side that you need to avoid or smooth out.
That's a good idea, but when firing up my gainclone today (not heatsunk yet), it got super hot during the max power testing. I think I got 25V p-p into 5 ohms with an LM3886. (My scope is out of cal and I only did it quickly)
Good thing I'm going to heatsink these puppies. These are sweet heatsinks for a gainclone, and only cost $2.98, and are what I bought and are what I am going to use.
See:
http://sales.goldmine-elec.com/prodinfo.asp?prodid=3547
Quote:
Super Large Heat Sink - G2209
Black anodized aluminum heat sink type HS10198 measures 4 7/8"L x 2 3/16"W x 1 1/4"Tall. Features 4 mounting holes and a large quantity of fins for efficient cooling.
An externally hosted image should be here but it was not working when we last tested it.
I bought 2, these are nice, look new. The only problem is that they have 2 little pegs on the flat side that you need to avoid or smooth out.
these heatsinks have a hell of a high resonance...
i don`t know about you but i find that heatsink resonance plays a big part...
i don`t know about you but i find that heatsink resonance plays a big part...
Well, thats exactly what I'm using. Yes they have those two little pegs, but those are what centers the PII processor to it. and thats why if you can get your hands on an old CPU, and pull it apart, you have an aluminum plate with spring clips for securing the chip to the heatsink with.
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