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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.) |
| Date | |
| Source | Own work |
| Author | Mark Pellegrini |
| Permission ( Reusing this file) |
Own work, share alike, attribution required (Creative Commons CC-BY-SA-2.5) |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 03:03, 30 December 2007 |
| 2,016 × 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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