The Colossus Mk 2 Rebuild
by Tony Sale 
Tony Sale's
Codes and Ciphers


The Bedstead

Loading a paper tape

How Z signals get to Q Bus

The X, S and M wheel pattern generators

The Relay rack

The output printer

This page was originally created by the late Tony Sale
the original curator of the Bletchley Park Museum

Current website rebuild is being sponsored by Rich Sale Ltd. SEO Consultant Cambridge