In search of 4B3A Microswitch Keyswitches (for a restoration, not a keyboard collector!)

[Ian Finder]

Thanks Cindy-

Unfortunately those won't work :(

On Fri, Jul 10, 2020 at 10:42 AM Electronics Plus <sales at elecplus.com>
wrote:

> I have a number of keyboards with Micro Switch ST switches, but no SD.
> Does anyone still use old Memorex or Telex keyboards?
>
> -----Original Message-----
> From: cctech [mailto:cctech-bounces at classiccmp.org] On Behalf Of Ian
> Finder via cctech
> Sent: Thursday, July 09, 2020 11:34 PM
> To: classiccmp at classiccmp.org
> Subject: In search of 4B3A Microswitch Keyswitches (for a restoration, not
> a keyboard collector!)
>
> I know what you guys are thinking- no, this isn't for a keyboard collection
> or some modern build or some other nonsense like that.
>
> I have a friend who is restoring a fairly interesting and historically
> significant vintage computer- a and subject to what appears to be a
> batch-related encapsulation failure on the proprietry hall effect sensors,
> but could have been some other trauma, around a little over half of them
> are bad.
>
> The correct SD-series replacement switch would be the 4B3A-
>
> *** These can allegedly be found on some of the Diablo printing
> terminals.**
>
> It is possible other switches ending in ***A could be made to work with a
> bit of labor and disassembly (swapping the fairly brittle sensors).
>
> I am not a keyboard expert but I have learned that you can remove a key on
> some of these microswitch keyboards and read the model fairly easily.
>
> Please let me know if you have a lead on a donor for these switches. They
> will be put to good use, and you can reply to me off list for more details.
>
> Thanks,
>
> - I
>
>
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