[Graham G3ZVT]

As schoolboys, a friend and I made a Wimshurst machine using counter-rotating 12 inch 78 RPM records.

Recently, someone mentioned that it couldn't have worked because shellac records were loaded with carbon.
I can attest it did work! I think the reason was we prepared the surface before applying the tinfoil segments, I remember having to obtain a tin of dope thinners, but I can't remember much else, except that we made a condenser from scratch with alternate layers of tinfoil and paper shapes meticulously cut out with scissors.

We must have followed an article in a book or magazine.