If they're round, they're rolled.This is very cool, who would have thunk... not sure if my polypro are rolled but I will try it!
I tried to locate an old schematic and I don;t think they are marked on the schematic. Usually there is a pictorial view and it could be marked there.The "outer foil" thing is new to me. How was the orientation shown on a schematic?
I have not tried, but I sure have the means to do it, as far as this lcr meter goes https://www.hioki.com/en/products/detail/?product_key=5824 (I have not read the manual yet, but I know it can do miracles). If we can agree on a few samples from farnell.com or tme.eu then I can order them and do some measurements, also with DC bias included.Has anyone tried to compare the characteristics of two capacitors with a capacity of 1uF using an RLC meter? For example, ceramic and polypropylene.
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by Jake Hertz
by Jake Hertz