Detail of the Bombe machine

Shaun Armstrong1939/1945

Bletchley Park

Bletchley Park
Milton Keynes, United Kingdom

This is a part of one of the four sets of 26 sensing circuits of the Bombe. It shows some of the rectifiers (black) and the resistors (green, in clips) used to make up the bridge circuit around the fast relays (not visible) which detect a stop. Just visible behind the rectifiers are some of the wound non-inductive resistors (gold), also part of the sensing circuit.


  • Title: Detail of the Bombe machine
  • Creator: Shaun Armstrong
  • Date: 1939/1945
  • Location: Bletchley Park
  • Rights: Crown Copyright. By kind permission Director GCHQ

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