Futuristic Theremax & Stage -- W. Botermans
Thanks to Wilco Botermans.
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Here is a picture of the Theremax that artist Piet Jan Blauw built in March of 2008. The position of the arms can be adjusted, and the antenna in top is just for show.
And the PDF contains an image of his amazing live setup. He's the guy with the white hair. The other is Jaap Drupsteen, the graphic artist who designed the Dutch paper money bills before the introduction of the Euro.
All the best