The Colossus Rebuild Project by Tony Sale

Colossus Reborn

The Output Waveforms from the Paper Tape Reader

The oscilloscope is a 4 channel unit kindly donated by Hewlett Packard. The Project does have some original 'scopes as used in WW II but this modern one shows the wave forms much more clearly to the visitor.

Note that the position of the sprocket hole aperture on the mask has been adjusted up or down to centre the output sprocket pulse on the maximum of the data track signal ready for sampling in the next circuits, the staticisers on the R rack.

This page was originally created by the late Tony Sale, the original curator of the Bletchley Park Museum, and Secretary of the Bletchley Park Heritage Society.