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KBK update for Saturday, 28th September

Deepak Kandepet found an Alps calculator keypad on eBay, with PCB code CH34149B. The switches are the type that resembles spring bridge but with a metal top, but the PCB code begins “CH”. This demonstrates that “CH” PCB codes are not specific to the series that became KCC. This suggests that “SCH” is not an older name for KCC, but instead a classification code for mechanical switches. This new theory all depends on what contact type is inside SCK switches, because the theory would indicate that these are neither mechanical nor reed.

View within the updates for 2019

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