Futaba MA series alternate action
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| Manufacturer | Futaba |
|---|---|
| Family | Futaba MA series |
| Switch type | Alternate action |
| Sense method | Metal leaf |
| Switch mount | Plate mount |
Futaba MA series alternate action is an alternate action switch in Futaba MA series.
Variants[edit | edit source]
Mk I[edit | edit source]
The Mk I switch was a peculiar adaptation of the regular momentary switch. The switch shell contains a latch track. Into the slider is placed a platform that bears the latch arm; a small wire rod appears to be used to hold the arm in the platform. The keycap mount of the slider is not known, but the platform itself has a square recess and requires custom keycaps.
The switch weight is 130 gf.
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Mk I switch from an NEC PC-8801mkII keyboard -
Close-up
Mk II[edit | edit source]
The Mk II switch has the latch arm mounted directly onto the slider; as such, this does not leave sufficient room for the standard negative Futaba keycap mount, so the front slot of the cross is shifted to the right. As a result, a custom keycap mould is required, and not the same custom keycap mount as required by the Mk I.
The arm pivots at the top of the slider, and runs down into a latch mechanism inside the front of the shell.
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Rivets clipped to allow opening
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Note: Broken lock arm. Missing pin that runs in lock channel.
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Lock arm removed
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Switch base with contact plates and inner spring.
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Lock channel in switch upper
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Lock channel removed from upper. -
Keyboards[edit | edit source]
- Focus FK-8000 (Mk II)<ref name="Trent">Deskthority – FK8000!</ref>
- Focus FK-9000 (Mk II)<ref>Deskthority – Futaba Lock photos</ref>
- Some Focus FK-5001s (Mk II)<ref>Deskthority – question on Focus 5001/9000 keyboards</ref>
- ETC Power Glide 105 (Mk II)
- NEC PC-8801mkII (Mk I)
References[edit | edit source]
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