Key Tronic magnetic reed
|This article requires additional photographic illustration — infobox image, and additional disassembly to clarify the construction|
- 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 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.
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.
The switches are difficult to find. The cause is unknown; factors other than switch rarity, such as false identification, could play a role.
- Key Tronic Corp. 65-0201-09
- Custom Key Tronic Corp. Keyboard
- KTC A 24956
- KTC A65-00627-021 PCB-002J