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Description The first analog to the Purple machine (w:Type B Cipher Machine) reconstructed by the US Signals Intelligence Service. The unit contains fourteen 6x25 steping switches. A hand-operated Red analog is also visible. The note to the right describes how a relay welded shut during the Purple unit's first trial and how adding a capacitor fixed the problem. (Pictures taken by Mark Pellegrini at the US National Cryptologic Museum.)
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Source Own work
Author Mark Pellegrini
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Captions

First analog to the Purple cipher machine reconstructed by the US Signals Intelligence Service.

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28 December 2007

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Date/TimeThumbnailDimensionsUserComment
current03:03, 30 December 2007Thumbnail for version as of 03:03, 30 December 20072,016 × 1,512 (1.22 MB)Raul654{{Information |Description=Pictures taken by myself at the US National Cryptologic Museum. |Source=Self-made |Date=December 28, 2007 |Author=Mark Pellegrini |Permission=Own work, share alike, attribution required (Creative Commons CC-BY-SA-2.5) |other_ve

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