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File:AnitaMk8Inside1.jpg

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Inside an operating ANITA Mk VIII (aka Mk 8) electronic calculator, which together with the Mk VII were the world's first electronic desktop calculators when launched in 1961.

This photograph shows:

  • The display on the right with a dozen nixie-type numerical indicator tubes, each mounted on the edge of a counter board.
  • The daughter boards in the centre holding many cold-cathode switching tubes. Some of these are lit up (like neon lamps, to which they are related), which shows that they are in the "on" state.
  • A GS10D Dekatron decade counter tube at top left (with a red mark on top), which is used to scan the keyboard for pressed keys.
  • Two ECC81 double-triode vacuum tubes, or thermionic valves, to the right of the Dekatron.
  • Many selenium diode packs, which are the black rectangular blocks.

Warning: there are dangerously high voltages exposed when operating one of these machines like this with the covers open.

Photograph taken by myself of a machine in my collection.
Date 28 April 2007 (original upload date)
Source Own work by the original uploader
Author MaltaGC at English Wikipedia

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MaltaGC at the English-language Wikipedia, the copyright holder of this work, hereby publishes it under the following license:
GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.
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attribution share alike 		This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
Attribution: MaltaGC
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This licensing tag was added to this file as part of the GFDL licensing update.

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The original description page was here. All following user names refer to en.wikipedia.
  • 2007-04-28 19:02 MaltaGC 728×800×8 (145356 bytes) Inside an operating Anita Mk VIII (aka Mk 8) electronic calculator, which together with the Anita Mk VII were the world's first electronic desktop calculators when launched in 1961. This photograph shows...
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current05:29, 10 August 2007Thumbnail for version as of 05:29, 10 August 2007728 × 800 (142 KB)Webaware (talk | contribs){{Information |Description=Inside an operating Anita Mk VIII (aka Mk 8) electronic calculator, which together with the Anita Mk VII were the world's first electronic desktop calculators when launched in 1961. This photograph shows - *The display on the r

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