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Author Topic: Silicon Graphics Granite (AT-101) $54 shipped & interesting old Ketronic  (Read 1549 times)

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Offline nubbinator

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Silicon Graphics Granite (AT-101) $54 shipped & interesting old Ketronic
« on: Sun, 12 January 2014, 02:07:01 »
« Last Edit: Sun, 12 January 2014, 02:12:23 by nubbinator »
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Offline blueSmoke

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Re: Silicon Graphics Granite (AT-101) $54 shipped & interesting old Ketronic
« Reply #1 on: Sun, 12 January 2014, 02:22:59 »
I believe the first two are alps sliders and the last two are capacitive foil ones. These have a slider with a spring at top and foam+foil at bottom. not that great...
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Offline nubbinator

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Re: Silicon Graphics Granite (AT-101) $54 shipped & interesting old Ketronic
« Reply #2 on: Sun, 12 January 2014, 02:28:55 »
I know for a fact that the first two are Alps, likely Cream Alps.  The next two, after closer inspection, probably are foam over foil.
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Offline AKIMbO

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Re: Silicon Graphics Granite (AT-101) $54 shipped & interesting old Ketronic
« Reply #3 on: Sun, 12 January 2014, 06:50:54 »
The sgi boards are dampened cream alps. They look to be in great shape too. It's a shame about that cable.
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Offline dante

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Re: Silicon Graphics Granite (AT-101) $54 shipped & interesting old Ketronic
« Reply #4 on: Sun, 12 January 2014, 10:18:30 »
Despite foam over foil the keycaps have more sex appeal than 99% of the mass produced crap shoveled today.
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Offline dorkvader

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Re: Silicon Graphics Granite (AT-101) $54 shipped & interesting old Ketronic
« Reply #5 on: Sun, 12 January 2014, 13:59:10 »
Quote from: nubbinator on Sun, 12 January 2014, 02:07:01

http://www.ebay.com/itm/NEW-OLD-STOCK-KETRONICS-COMPUTER-KEYBOARD-VINTAGE-/261372733041?pt=PCA_Mice_Trackballs&hash=item3cdb076671

http://www.ebay.com/itm/KETRONICS-COMPUTER-KEYBOARD-VINTAGE-/251423103202?pt=PCA_Mice_Trackballs&hash=item3a89fc18e2

I'm guessing it's an old Hall Effect switch.
Highly doubt it: I have never seen a hall effect keytronic KB. Keytronic did make some reed switch keyboards back in the day (I have tried several). The cheapest reed switches you can get are old gilbarco panels that use them.

These two are both clearly capacitive. You can see the capacitive pads under each switch through the bottom of the PCB.
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Offline Hak Foo

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Re: Silicon Graphics Granite (AT-101) $54 shipped & interesting old Ketronic
« Reply #6 on: Sun, 12 January 2014, 22:57:04 »
I'd warrant the SGI caps make a good swap for, say, an AT101W's ugly lasered caps... except for the bottom row :/
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Offline Findecanor

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Re: Silicon Graphics Granite (AT-101) $54 shipped & interesting old Ketronic
« Reply #7 on: Mon, 13 January 2014, 00:19:04 »
Quote from: Hak Foo on Sun, 12 January 2014, 22:57:04
I'd warrant the SGI caps make a good swap for, say, an AT101W's ugly lasered caps... except for the bottom row :/
Why don't you use the SGI keyboard as it is? It talks PS/2. It has Cream Alps which many find to be much nicer than the Black Alps of the Dell AT101W.
If you don't like the granite case, chances are that the innards fit inside a Dell AT101.
Anyway, the "SGI Granite" is a bit of a collector's item and worth more complete.
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