File:American first purple analog 1.jpg

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First analog to the Purple cipher machine reconstructed by the US Signals Intelligence Service.
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.)
Date
Source Own work
Author Mark Pellegrini
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current03:03, 30 December 2007Thumbnail for version as of 03:03, 30 December 20072,016 × 1,512 (1.22 MB)Raul654 (talk | contribs){{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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