|[AMRadio] old round aluminum filter Capacitors|
jack at schmidling.com
Wed Nov 1 10:44:00 EST 2006
John E. Coleman (ARS WA5BXO) wrote:
> What was in these things? The inside of the can is lined with a perforated
> brittle screen perhaps some carbon stuff. The center post is connected to a
> foil which is wound in a spiral. I don't think it is laminated foil?
Not sure just what you have but electrolytics are/were made by a process
that produced the dielectric when fired up. The foil was uninsulated
and immersed in a chemical soup that coated the foil with a very thin
layer of dielectric when activated. It's electro/chemical magic.
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