deskthority

Posted: **12 Oct 2015, 00:49**

I noticed that the Wiki had a reference to the Lear Siegler having Hi-tek switches. There were a couple of runs of the ADM3A including an earlier one than mine that was light blue. Mine is beige but it does not have Hi-tek switches. It looks to have Futaba Linear Complicated switches?

Here's some pics:

: LSI ADM3A - full keyboard; LSI ADM3A - full keyboard.jpg (380.6 KiB) Viewed 5340 times

: LSI ADM3A - keyboard profle; LSI ADM3A - keyboard profile.jpg (289.9 KiB) Viewed 5340 times

: LSI ADM3A - close up switches; LSI ADM3A - close up switches.jpg (398.72 KiB) Viewed 5340 times

: LSI ADM3A - full key switches; LSI ADM3A - full key switches.jpg (337.86 KiB) Viewed 5340 times

: LSI ADM3A - under key caps; LSI ADM3A - under key caps.jpg (298.5 KiB) Viewed 5340 times

: LSI ADM3A - key switches profile; LSI ADM3A - key switches profile.jpg (363.46 KiB) Viewed 5340 times

: LSI ADM3A - under space bar; LSI ADM3A - under space bar.jpg (383.36 KiB) Viewed 5340 times

: LSI ADM3A - top of main circuit board; LSI ADM3A - top of main circuit board.jpg (629.81 KiB) Viewed 5340 times

: LSI ADM3A - bottom of main circuit board; LSI ADM3A - bottom of main circuit board.jpg (659.37 KiB) Viewed 5340 times

: LSI ADM3A - bottom of keyboard; LSI ADM3A - bottom of keyboard.jpg (568.28 KiB) Viewed 5340 times

Posted: **12 Oct 2015, 01:21**

that looks to be traced out by hand.

It takes a special kind of person to do that !

Posted: **12 Oct 2015, 01:40**

By hand? Fuck me, that must be one of the most dizzying jobs in the world! Oo

Posted: **12 Oct 2015, 02:02**

Chyros wrote: By hand? Fuck me, that must be one of the most dizzying jobs in the world! Oo

Its got nothing on some of the old wire wrap stuff.

Posted: **12 Oct 2015, 09:38**

Oh. My. God. What the HELL.

Posted: **12 Oct 2015, 10:46**

wire wrap is awesome when done right , thats not!

Posted: **12 Oct 2015, 11:00**

Very nice collection, snuci!
Do you have the numeric pad with this comupter? Hope to see her switches.

Posted: **12 Oct 2015, 11:58**

That is an amazing PCB. Is it dated? And is the entire PCB solely for the keyboard? There certainly is no shortage of IC'S or dip switches

Posted: **12 Oct 2015, 16:58**

terrycherry wrote: Very nice collection, snuci!
Do you have the numeric pad with this comupter? Hope to see her switches.

I do not have the keypad and have never seen one "in the wild". That probably would not have been a popular option.

rsbseb wrote: That is an amazing PCB. Is it dated? And is the entire PCB solely for the keyboard? There certainly is no shortage of IC'S or dip switches

The board above is the entire terminal board including keyboard portion. The only thing not down is the CRT and power supply transformers. Everything else is on that board. It does have a date of 1982 but this was a rev of the first ADM3A that originally came out in 1975. The board would not have changed much other than small changes so that's why it's hand drawn.

Posted: **16 Oct 2015, 18:09**

Most of the ADM terminals I've seen are Hi-Tek. Futaba is better, but still not that great.

I think near the end Lear Siegler switched to Key Tronic foam & foil.

deskthority

Lear Siegler ADM3A terminal keyboard

Lear Siegler ADM3A terminal keyboard