File:TTY mixer 131B2 TM-11-2222 Fig 3.jpg

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English: Type 131B2 mixer, used by the U.S. to encrypt teletypewriter transmissions during World War II and up to 1960 by combining plaintext data with a binary key stream using the XOR operation. Used with w:SIGTOT one-time-tape and w:SIGSUM key generator. Later renamed AN/FGQ-1. Unit photographed from the rear with grill removed. Large cylinders are WEco. 255 polar relays.
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Source http://www.navy-radio.com/manuals/tty/fgq1-tm-11-2209.pdf Figure 3 in Department of the Army Technical Manual TM-11-2209
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current21:55, 8 April 2019Thumbnail for version as of 21:55, 8 April 2019625 × 725 (364 KB)ArnoldReinhold (talk | contribs)User created page with UploadWizard

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