Rejuvenating the Yaesu FR-50B Receiver - Part 2

摘要

It has become common practice when working on older equipment to change all the electrolytic capacitors because these capacitors age and ultimately fail. Electrolytic capacitor failure can be catastrophic (explosion, fire, smoke, short circuit) or silent (electrolyte leakage, open, ESR increase, capacitance decrease). The first circuit in which electrolytic capacitors seem to fail is in power supplies. This is because electrolytic capacitor ageing is accelerated by heat and power supplies are usually running warm if not hot.