Spasticteapot said:
A non-polarized capacitor can be cut open to remove the metalized film. If you look at audio crossover caps you will find metalized film with kapton or mylar base films. The aluminum metal is sputtered on and is just a few microns thick. You can also find audio crossover capacitors with separate foil and film layers rolled together. This can be a source of thin aluminum foil. TYPICALLY, a low voltage capacitor will use a thinner film.
If you want an all metal ribbon home packaging aluminum foil is typically 25 microns thick, a little heavy for a speaker but a good training material. You can also find 12 micron aluminum foil from in some stores. Many production tweeters use 8-9 micron foil.
If you use a pane of glass as your cutting board you can spray it with water to hold down the film while you cut it with either a razor or rolling blade.
Hello Dirk,
I bought a small quantity of the foil from a manufacturer for capacitors some time ago. But be warned: Handling of the thin foil is very (!) difficult and I didn't find that measurements did justify the extra effort - look at my page for more details: (http://www.michaelgaedtke.de/SubMenu_Lautsprecher/Ribbon_1.htm)
I bought a small quantity of the foil from a manufacturer for capacitors some time ago. But be warned: Handling of the thin foil is very (!) difficult and I didn't find that measurements did justify the extra effort - look at my page for more details: (http://www.michaelgaedtke.de/SubMenu_Lautsprecher/Ribbon_1.htm)
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