I've found two 20 000 uF 50 V capacitors on a shelf, they've been sitting there for some 8 years. How can I find out if they're still good or not? I need them for a rectifier for my audio power amplifier. Additionally, I would like to check the capacitors that are currently installed in the amp to find out whether they all need replacement or if some are still OK. They have slightly varying capacities and voltages - 10000 to 20000 uF, 35 V to 63 V.
I don't have sophisticated lab equipment, all I've got is a DMM and a DC power supply with voltage source and current source modes (both V and I can be limited at the specified values).