Any person who operates with older digital equipment will prior to extensive study to place Rifa capacitors, a distinctive yellow-translucent component frequently employed in mains filters, that is notorious for failures. It’s normally assumed to be due to their absorbing h2o, but dependent on [Jerry Walker]’s long practical experience, he’s not so confident about that. Therefore he’s taken a large stock of the elements and subjected them to exams in order to get to the base of the Rifa problem the moment and for all.
What he was ready to get both from the sections he eliminated from more mature gear and by applying AC and DC voltages to take a look at capacitors, was that those which had been applied in DC programs experienced a a lot lower probability of exhibiting precursors to failure, and also a much extended time prior to failure when related to AC mains.
Indeed, it is only at the close of the online video that he reveals a single of the components in front of him is an ex-DC aspect which is been hooked up to the mains all the time with no blowing up. It’s likely then that these capacitors didn’t complete tot heir spec only when used in AC applications. He nonetheless endorses replacing them wherever they are identified and we’d fully concur with him, but it is interesting to have some gentle lose on these notorious areas.
Many thanks [Ian Somers] for the tip.
Header: Cjp24, CC BY-SA 4.
