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Cherry keyboard - Mystery switch?

Posted: 07 Mar 2016, 14:02
by snuci
I thought this might be fun for some who like a good mystery...

Last week or so, I bought a couple of Cherry keyboards. They are from 1983 and they are terminal keyboards that appear to be convertible to XT keyboards according to this data sheet: w/images/3/33/BFN3-8354.pdf They appear to be just before the G80 line began.

The data sheet indicates that theses should be "solid state capacitive" key switches (foam and foil) but one of the keyboards has a broken key stem and it does not look like the foam and foil switches in my other Cherry solid state capacitive keyboard.
Cherry KFB3-8351 keyboard
Cherry KFB3-8351 keyboard
Cherry KFN3-8351.JPG (181.83 KiB) Viewed 3137 times
It is a terrible picture but blown up and with contrast and brightness adjusted, the key stem appears to be white, flat and in an "H" pattern. You can barely make out two black guides that are built into the key switch body for the key stem to travel up and down on.
Broken key switch
Broken key switch
Cherry keyboard - mystery key switch.jpg (127.74 KiB) Viewed 3137 times
It has been found that Cherry has made keyboards in the past with other manufacturers key switches. This thread from GH has pictures of a Cherry keyboard made for DEC that has Hi-Tek switches. It is an almost certainty that my keyboard has non-Cherry switches but I can't figure out whos.

I'll be getting the keyboard in a few days but I thought I'd put it out there to Cherry experts. What do you think?

Posted: 07 Mar 2016, 14:27
by ramnes
Can't tell much, but interesting nonetheless!

Posted: 07 Mar 2016, 14:59
by kbdfr
Seems to be the same kind of UFO as here, but upside down:

Image

:mrgreen:

Posted: 07 Mar 2016, 15:03
by photekq
Very odd indeed. The keycaps look to be Cherry profile, but not Cherry font!

Posted: 07 Mar 2016, 20:36
by MECHGAMER
I was looking at that keyboard, but didn't know what switch it was and stayed away. When you get it, please take it apart and take pictures.

Posted: 09 Mar 2016, 23:45
by snuci
I'll put this here for now until I can take better pics...
Cherry - Shamrock foam and foil.jpg
Cherry - Shamrock foam and foil.jpg (345.03 KiB) Viewed 2994 times

Posted: 10 Mar 2016, 03:13
by terrycherry
That was...unbelievable! A new Cherry switch found and it had patent. We should find which patent it has.
Waiting for more picture here.

Posted: 10 Mar 2016, 15:38
by Redmaus
Is it tactile or linear?

Posted: 11 Mar 2016, 17:51
by E3E
Whoa, interesting to see! I'm curious about how this thing works and how the switches feel.

Indeed, are they linear or what?

Posted: 11 Mar 2016, 19:06
by snuci
[quote="E3E";p=294261Indeed, are they linear or what?[/quote]

They are foam and foil switches. More pics to come.

Posted: 12 Mar 2016, 02:01
by snuci
I bought both keyboards that the seller had to take advantage of reduced shipping over both and it turns out the second keyboard has slightly different switches plus white switches for the Enter keys!
Cherry split shamrock - white Enter key
Cherry split shamrock - white Enter key
Cherry split Shamrock -white enter.jpg (441.14 KiB) Viewed 2859 times
Photos thread coming soon for both.

Posted: 19 Mar 2016, 16:46
by cherry-jade
I got one.

Posted: 23 Mar 2016, 18:08
by xiaodian317
There are some old key switch(From M5 TO M9) before the CHERRY MX coming out.