Wobbulator and the art of TV signal interference

A short demo video on the Wobbulator. It was originally made in the 1970’s by Nam June Paik and video engineer Shuya Abe.

Raster Manipulation Unit: Operation and Construction by Sherry Miller Hocking, Richard Brewster, with Walter Wright, 1980

A raster manipulation unit or ‘wobbulator’ is a prepared television which permits a wide variety of treatments to be performed on video images; this is accomplished by the addition of extra yokes to a conventional black and white receiver and by the application of signals derived from audio or function generators on the yokes.

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