British Telecom M1500

aestetix

02 Sep 2024, 14:12

This was being thrown away by a bank so I saved it. Sadly the terminal is gone.
PXL_20240831_182214221.jpg
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PXL_20240831_182205745.jpg
PXL_20240831_182205745.jpg (866.72 KiB) Viewed 5707 times
It's fairly heavy and the switches feel linear. It has an RJ11 plug. Worth restoring? To be honest it doesn't seem that interesting to me, but I didn't want to chuck it if it was special. Other than the dirt it seems to be in decent condition.

I have the missing key, by the way, I just removed it for the photos.

xxhellfirexx

02 Sep 2024, 21:54

It's a Wyse ASCII keyboard with custom keycaps.

wiki/Wyse_ASCII

AndyJ

03 Sep 2024, 05:59

I love the key layout. The extra keys would be handy, particularly if you were into remapping layouts for efficiency.

The web says there have been Wyse-to-USB adapters to allow them to be used on a PC. xx's link says it takes Cherry keycaps if you want to change them.

modelf

03 Sep 2024, 09:15

Vintage Cherry MX black switches. Would bet the space bar is MX grey. Worth a lot just for the switches.

aestetix

03 Sep 2024, 10:04

Thanks, that's very interesting. So worth restoring then. I'll see about cleaning it up. I'm not a fan of linear switches myself, but I enjoy repairing and restoring things.

The space bar has three switches under it. I was expecting a stabilizer bar but it's just three switches, one in the middle and one at either end.

The keys feel okay, which is good because I didn't really want to get into taking the switches apart. Hopefully a good clean is all it needs, and then some kind of adapter or replacement controller board. I've done my own keyboard controllers and firmware in the past, but it seems like these days you can just buy something decent and use open source firmware.

AndyJ

04 Sep 2024, 02:08

aestetix wrote:
03 Sep 2024, 10:04
The space bar has three switches under it. I was expecting a stabilizer bar but it's just three switches, one in the middle and one at either end.
I'm by no means as expert as many on the forum, but I've never seen that before. Stabilizers are way cheaper than switches, and electrical engineers are notorious penny-pinchers.

Huh. If I ever do a keyboard from scratch I might well steal that idea.

wjrii

22 Sep 2024, 18:45

AndyJ wrote:
04 Sep 2024, 02:08
aestetix wrote:
03 Sep 2024, 10:04
The space bar has three switches under it. I was expecting a stabilizer bar but it's just three switches, one in the middle and one at either end.
I'm by no means as expert as many on the forum, but I've never seen that before. Stabilizers are way cheaper than switches, and electrical engineers are notorious penny-pinchers.

Huh. If I ever do a keyboard from scratch I might well steal that idea.
Although as you point out yourself, there's an efficiency to keeping the BoM smaller too. :D

Ultimately, though, dummy switches are pretty poor stabilizers, because they don't physically link the two sides, so you are really testing the switches' capacity to resist binding. The wider the spacing, the worse it gets. Better than nothing, of course.

AndyJ

25 Sep 2024, 00:47

There you go, putting greasy thumbprints on my rose-colored glasses...

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