Fluke 1720A Programmer Keyboard - Switches?

Invisius · 08 Mar 2016, 00:57

I've been cleaning up a recent find, and was wondering if anyone knew what switches these had. Guys on IRC think it's a USw_LXBB03 or Datanetics, they're stiff linear switches with 4mm travel or so.

The caps fit right on my mx blue/clear boards, too! Appreciate any feedback, and I'm glad to take more pics.

snuci · 08 Mar 2016, 03:00

Nice post. The Datanetics PCB makes this quite interesting.

terrycherry · 08 Mar 2016, 05:56

Great new variant found! This switch is very rare.
(Linear)USw LXBB03(Black) was from Haata's FLUKE Y1700 keyboard. The corner of switch shell is differ to yours.
Take a look to (Linear)USw LXBN01(USw LXBR01)(Brown). Your switch is same as it but having the different color.
So you got your new variant of USw LXBB03 and USw LXBN01 family.(Linear)USw LXBN01(Black)
I found these switch on FLUKE keyboard and HP Protocol Analyzer keyboard only and they haven't the assy brand.(Only your keyboard having)
Although the HP keyboard branding the HP logo on PCB but this company doesn't make switch that day.
Maybe it's time to say this switch called Datanetics.
Hope to see the high quality photos about this.

Invisius · 08 Mar 2016, 15:36

Thanks guys!

I was going to measure the actuation force, but there's a huge difference between some switches.

It also seems like there's two tabs, should the top halves pull off without desoldering? I'll get my DSLR out to take some better pics later tonight or tomorrow, are there any parts you'd like to see in particular terrycherry?

terrycherry · 10 Mar 2016, 03:55

Sounds good you"ll take with the DSLR and yes if you having the time. I hope you can take the details like my post.(I know its hard to shot like that)
keyboards-f2/tava-pc-keyboard-type3-t11158.html
I think you can not take out the top shell without desolder. I"ll take a look on my yellow variant tonight and tell you about this,

snuci · 12 Mar 2016, 02:22

Invisius, take a look at the Datanetics DC-60 wiki page with details on this key switch: wiki/Datanetics_DC-60_series. There's a product brochure that was posted also.

Invisius · 13 Mar 2016, 01:08

snuci wrote: Invisius, take a look at the Datanetics DC-60 wiki page with details on this key switch: wiki/Datanetics_DC-60_series. There's a product brochure that was posted also.

Big thanks to you, Meryl Miller and Daniel Beardsmore for figuring these out, I took a few more pictures today and upped them here https://imgur.com/a/erUCZ

I'm not a photographer and don't aim to be, but I'm glad to take any more specific angles/perspectives you want of this.