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Author Topic: Model M Card to Base Initials Missing  (Read 1172 times)

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Offline y11971alex

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Model M Card to Base Initials Missing
« on: Sat, 23 April 2016, 12:51:25 »


Of the ~10 Model M keyboards that have come into my hands, none of them had a "Card to Base" initialled.  Is there any clear reason why?
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Keyboards owned: IBM Selectric | 3278 | 3101 | 5251 | Model F XT | AT | 122 (6110344) | Model M 1390120 | 1390131 | 1391472 | 1392464 (DisplayWriter SSK) | 1395100 (SSK) | Honeywell RD IBM 09F4230 | Leading Edge DC-2014 (Blue Alps) | Chicony 5891 (Monterey Blue) | E&E-101 (KPT Blue) | BTC 5100 | 5100C | 5369 | DEC VT100 (Hi-tek Linear) | Burroughs TP109 (Hall) | Realforce 87 (55g)

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Offline fohat.digs

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Re: Model M Card to Base Initials Missing
« Reply #1 on: Sat, 23 April 2016, 16:52:31 »
No idea why, but I think that the statute of limitations has run out on getting it remedied.
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Offline E TwentyNine

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Re: Model M Card to Base Initials Missing
« Reply #2 on: Sat, 23 April 2016, 17:26:43 »
I want to say "card to base" probably had something to do with the capsense boards where they had the soldered wires running from the controller to the PCB.  If that's screwed up it took some work to redo.

The stickers got reused for the M, and I'm guessing that test was folded into "merge", which may be the first test after the internals are put together.   Way easier to swap out an M controller and put the keyboard back in the line.

Just a guess though.
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Daily driver: SSK or Tenkeyless IBM AT
1984 Model M Industrial Prototype ⌨ 1992 Black Oval Industrial SSK ⌨ 1982 5251 Beam Spring ⌨ 89 Key "SSK" ⌨ M13 triplets
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