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Switch collection Alps KEH Black

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Manufacturer Alps Electric Co., Ltd.
Series KEH
Part number KEH10903
Behaviour Linear
Signalling type Conductive rubber
Switch mount Plate
Keycap mount Cruciform post
In production No
Work done No
Last audited 2019-05-05


Acquired 1
Given away 0
Sold 0
Remaining 1


The part number is given as KEH10903 here: http://systemjsynthesizers.co.uk/Roland-TR-808-Start/Stop-Switch-Original-Alps (STRONIC list this as MC-4, and finally I understand what MC-4 means — the Roland MC-4 used these switches).

This is not strictly linear: it is closer to progressive rate. The spring is stronger than the dome (which is fairly flat), so as the slider is pressed, the dome collapses first, in a linear manner. The spring does also appear to compress somewhat at the same time, extending the pretravel.

Once the dome is fully depressed, the return spring provides all the force, and being stiffer than the dome, the overtravel period is stiffer than the pretravel period, but still linear.


Source Consignment Quantity Line Notes
CMIM - STRONIC Consignment the 163rd 1 (NOS) KEYBOARD SWITCHES MC-4