Hi Stan,
Thank you for the nice words.
The generator is of my own design and is based on the innards (field coil assem. armature and brush holders) from a old vacume cleaner. It needs a DC supply for excitation.
The engraved cover was 3D modled in Turbocad and toolpaths generated in a CAM package. The Machining was done on my home built CNC router.
Cheers.
Abraham