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post #41 of 44
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Quote:
Originally Posted by nolonger View Post
I'd need a huge rheostat for 30W. Imagine 50W! For small fans a single rheostat could work fine, but for high performance you'll need something beefier.
Yeah, iv got quite handy with electronics. I mean iv been good with computer hardware for ages but I understand the workings of things now. I do chemistry too so I understand why silicon is a semi conductor and why capacitors explode or bulge with heat, things like that.
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post #42 of 44
If you want to approach the capacitance of the original 680 micro farad cap then put both 330's in parallel, you will then have about 660 micro farads. Caps in series will effectively half the total capacitance in a given circuit. To be safe make sure your 330's each have a voltage rating of at least the rating of your original 680 mf cap. In practice tho I always overated my repair caps a little, why ask for trouble when you don't have to. After the repair give your circuit a good look see for any other obvious potential problems, shield yourself and others before applying power to your repair..heh. heavy smoke and or flying debris is a good indication of a faulty repair job....well you tried....back to square one.
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post #43 of 44
Thread Starter 
Quote:
Originally Posted by sgtjeep View Post
If you want to approach the capacitance of the original 680 micro farad cap then put both 330's in parallel, you will then have about 660 micro farads. Caps in series will effectively half the total capacitance in a given circuit. To be safe make sure your 330's each have a voltage rating of at least the rating of your original 680 mf cap. In practice tho I always overated my repair caps a little, why ask for trouble when you don't have to. After the repair give your circuit a good look see for any other obvious potential problems, shield yourself and others before applying power to your repair..heh. heavy smoke and or flying debris is a good indication of a faulty repair job....well you tried....back to square one.
Haha, lol. I would consider the smoke and flying debris as a job well done
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post #44 of 44
I had a cap blow (a large one, literally explode) in an ancient PSU, which led to a short on the motherboard which led to an exploded chip. When I was sure it was drained and cracked it open to salvage the fan, I noticed that the cap actually blew some other parts away from it o.O

At any rate, if a cap blew, there was a reason. Something might have gone wrong farther down the line to make that cap blow, so any repairs might blow the new cap.
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