Hall effect?

[elecplus]

20160324_140408~2.jpg (621.95 KiB) Viewed 1864 times

Very old Digital keyboard

20160324_140418~2.jpg (713.63 KiB) Viewed 1864 times

[Redmaus]

Not hall effect unfortunately. Looks like NMB switches of some kind.

[elecplus]

There is a page in the wiki for the VT-100 keyboard but it does not say what the switches are.

[Chyros]

They're Hi-Tek linears. Electromechanical, not Hall effect. Very stiff.

[XMIT]

elecplus, these are either Stackpole or Hi-Tek linear switches as Chyros mentioned. I remember that you had a bunch of these in Kerrville. You can see the "praying hands" electrical contacts. You won't see these contacts on a Hall effect board since there are no contacts in those switches. Yes, they are heavy linears.

Yes, these are VT-100 terminal boards. They're not too popular here (or are they? does anyone beside snuci have or want one?) but sometimes vintage computer folks will pick them up.

[Chyros]

elecplus, these are either Stackpole or Hi-Tek linear switches as Chyros mentioned. I remember that you had a bunch of these in Kerrville. You can see the "praying hands" electrical contacts. You won't see these contacts on a Hall effect board since there are no contacts in those switches. Yes, they are heavy linears.

They're Hi-Teks. Stackpole have small "fingers" on both sides; Hi-Teks only have them on one side.

[seebart]

Interesting keyboard, too bad it's missing a few keycaps.

[Invisius]

Cool caps, they do look very similar to the Microswitch/early Honeywell boards. I've seen these switches on a Zenith Z-19 terminal before; like Chyros said they're 'bout as stiff as British parliament.

[snuci]

Classic keyboard! I do have a VT-100 keyboard along with the matching DEC terminal. I didn't post any pics because the Wiki has great pics already but might have the Hi-Tek fact missing. The PCB is made by DEC so there's no Hi-Tek label to absolutely identify the key switches.

It's a classic terminal so someone on the "cctalk" mailing list will likely buy it if they need parts.

[Chyros]

Tbh the Stackpole design is virtually identical to the Hi-Tek one. Hi-Tek even sued Stackpole over it, apparently. Hi-Tek did keep the "fingers on one hand only" design for the Space Invaders switches, though.