cross section of an electrolytic capacitor! i'll annotate it shortly.pic.twitter.com/d5bxWEp9o7
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They're most often found as filter capacitors in the power suppliy of tube electronics. They have from two to five caps stuffed in an aluminum can with the outer shell being a common ground and positive electrodes for each cap sticking out of the bottom.https://www.tubesandmore.com/products/capacitors?filters=Type%3DMulti-Section%20/%20Can%20Type …
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