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I saw many brand new ceramics like that when I worked at Zenith, that obviously met specs. Never had time to investigate why they were like that, but now I wonder if it was a way to tune them to within 5% in the capacitor factory by etching away some of the metal.
EDIT: or, of course, it could be unintentional but acceptable.
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Old TV literature, New York World's Fair, and other miscellany
Last edited by old_tv_nut; 03-02-2019 at 10:11 AM.
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