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Capacitor soakage and PIO caps
My earlier mention of Bob Pease led me to google him. I found this very interesting article that may help to explain why ancient PIO capacitors behave in a different way to modern (better?) capacitors. http://www.national.com/rap/Applicat...570,28,00.html
In the 1940s electrolytics were known to be noisy, so for low noise power supplies paper-in-oil was favoured, but I think by the 1960s they were rarely if ever used in that role as they were far too large - and probably too expensive. |
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