Difference between revisions of "Key Tronic magnetic reed"

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==References==
 
==References==
 
<references>
 
<references>
<ref name="ktc19790">[http://deskthority.net/keyboards-f2/key-tronic-corp-serial-no-19790-t11875.html] - Discussion related to Keytronic 19790 Keyboard</ref>
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<ref name="ktc19790">Deskthority &mdash; [http://deskthority.net/keyboards-f2/key-tronic-corp-serial-no-19790-t11875.html Key Tronic Corp. Serial No.19790]</ref>
<ref name="ktchistory">[http://deskthority.net/keyboards-f2/interesting-history-of-key-tronic-t9529-30.html] - Discussion of Key Tronic history article </ref>
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<ref name="ktchistory">Deskthority &mdash; [http://deskthority.net/keyboards-f2/interesting-history-of-key-tronic-t9529-30.html Interesting History of Key Tronic]</ref>
<ref name="ktcccho">[https://books.google.com/books?id=WSYjdR425p4C&pg=PA158&lpg=PA158&dq=key+tronic+reed+switch+keyboard&source=bl&ots=AtuiBI7bRm&sig=Fazup3PXUsVV9eDLnTr6mguz6U0&hl=en&sa=X&ved=0CFUQ6AEwCWoVChMI0_-wxO3myAIVRO8mCh0Segzr#v=onepage&q=key%20tronic%20reed%20switch%20keyboard&f=false] - Line in "Complete Computer Hardware Only" </ref>
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<ref name="ktcccho">Google Books &mdash; [https://books.google.com/books?id=WSYjdR425p4C&pg=PA158&lpg=PA158&dq=key+tronic+reed+switch+keyboard&source=bl&ots=AtuiBI7bRm&sig=Fazup3PXUsVV9eDLnTr6mguz6U0&hl=en&sa=X&ved=0CFUQ6AEwCWoVChMI0_-wxO3myAIVRO8mCh0Segzr#v=onepage&q=key%20tronic%20reed%20switch%20keyboard&f=false Line in "Complete Computer Hardware Only"]</ref>
<ref name="ktccustom">[http://imgur.com/a/KFnC2] - Photos of custom Key Tronic keyboard</ref>
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<ref name="ktccustom">Imgur &mdash; [http://imgur.com/a/KFnC2 Photos of custom Key Tronic keyboard]</ref>
 
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</references>
 
 
<references />
 
  
 
[[Category:Key Tronic switches]]
 
[[Category:Key Tronic switches]]

Latest revision as of 12:32, 23 January 2018

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Template icon--Illustration.png This article requires additional photographic illustration — infobox image, and additional disassembly to clarify the construction
Key Tronic magnetic reed
Manufacturer Key Tronic
Switch type Linear
Sense method Reed

History

General consensus indicates that Key Tronic Corp. produced reed switch keyboards during the 1970s. Specific dates and catalog information have not been discovered.[1][2][3]

Variants

Variant 1

  • The keyswitch housings were produced in several "bank" configurations. The minimum housing configuration, 1, was used for space bars and singleton keys. The maximum, 6, was used for central rows.
  • The upper housing contains slider guides, but is otherwise a simple rectangular enclosure.
  • The lower housing contains conical plastic projections that stand upright, holding the reed valves and covering them completely.
  • The slider is a one piece mechanism containing a circular magnet and spring. The spring compresses the magnet against the top of the slider and provides resistance to counteract fingers and gravity.
  • The housing is held together by a screw and nut; a third nut holds the assembled switch to the PCB.
  • The reed is soldered directly to the PCB.

Variant 2

Variant 2 is similar to variant 1. The switches feature a different slider top, cut off reed enclosure tips, and a spring with fewer coils. Those design choices were likely made to decrease material cost and reduce keyswitch travel distance. Additional differences are visible in the gallery.[4]

Feel & Sound

Variant 1 is exceptionally linear and fairly smooth. A light "ting" or "ping" can be heard when the switch activates. It is not a light switch. Variant 2 should be equally linear due to its design, though that fact cannot be verified.

Availability

The switches are difficult to find. The cause is unknown; factors other than switch rarity, such as false identification, could play a role.

Keyboards

  • Key Tronic Corp. 65-0201-09
  • Custom Key Tronic Corp. Keyboard[4]
  • KTC A 24956
  • KTC A65-00627-021 PCB-002J

References