How long can a electrolytic capacitor last un-used?
Do electrolytic capacitors have a shelf life? I’ve an opportunity to buy an mono amplifier with 20 year old capacitors that have under 700 hours total use. The amps sound perfect without any issues. VTL Siegfried MK 1.
Electrolyte evaporation doesn't depend on whether a cap is charged or not, mostly depends on temperature. After 20 years you're probably due for a re-capping.
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