Welch wrote:A note about that, make sure to do your research on the electrolytic caps first, not only do they need to be low ESR, but generally the circuitry that is using solid caps requires much higher resistance electrolytic caps, its not a 1:1. For instance an 820uF solid cap might require a 1500uF electrolytic.
Replace "resistance" with "capacitance" and I will (sort of) agree with this. Wet electrolytics typically will have higher ESR; you can partially
make up for this with higher capacitance and/or ripple current spec.
Welch wrote:I'd imagine the ones you may have seen blown were the solid caps that have the slits in the top to allow for that sort of failure. I've noticed with more older caps that appear to be solid caps that they have those slits... Perhaps its possible that they were electrolytic caps in solid style aluminum cylinders?
Yes, that is also a possibility. It is really nothing more than a convention that the "wet" ones get colored plastic sleeves and the "solid" ones are bare aluminum. The ones with the sleeves on them are still aluminum cans underneath. I could even imagine a less-than-scrupulous video card or mobo manufacturer requesting
wet electrolytics with bare cans from a capacitor vendor, just to give the impression
that they are using (superior) solid caps on their products.
The years just pass like trains. I wave, but they don't slow down.
-- Steven Wilson