> while others, like those used as part of small signal filter I wouldn't expect those to be electrolytic, though. Electrolytic capacitors are mostly used when

> while others, like those used as part of small signal filter I wouldn't expect those to be electrolytic, though. Electrolytic capacitors are mostly used when the exact characteristics are not important, like on a supply bus, where your qualifications are typically either "at least" or "no more" than some value. Tripling capacitance usually has no negative effect on a supply bus but huge change of doing signal conditioning, so something like that is more often going to be a capacitor that is intrinsically more stable.