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Air variable capacitor from scrap aluminum sheets

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Step 3: Marking lines for the stator plates

Picture of marking lines for the stator plates
Using a tri-square, draw a line from the edge of the sheet up to the center of the arc. (The one that is pointed by a pen on the photo)
It is important to do this, because we need each part to be uniform in size. And this also serves as a guide when we cut them out.
 
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