Reading in my new Art of Electronics (Pg 22)... electrolytic capacitors have terrible accuracy, ghastly temperature stability, and aweful leakage. They're good for power-supply filters. They have a short life-span.

Tantalum on the other hand has only poor accuracy and temperature stability. Leakage is non-applicable. They're high capacitance, small, and have low inductance.

Not that I know much of what that means, but hey, I just got the book today, alright?

What farad range and voltage do you need? I'd love a 1 farad 20 volt, but they only come in electrolytic and cost a little over a hundred bucks. ;-) Though I'm now reading about 7-farad ultracapacitors the size of a AA
battery ... whoah momma.

Greg