Author Topic: Mitsumi Keyboard  (Read 13018 times)

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Offline timw4mail

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Mitsumi Keyboard
« on: Thu, 25 June 2009, 16:47:19 »
Okay, I know it isn't mechanical, I used to have this old Mitsumi keyboard, probably one of the best rubber dome keyboards I ever used,

it looked like this:


Anyone know anything else about this keyboard? I'm pretty sure it isn't an ordinary dome keyboard, it had a rather light, bouncy feel to it.
Pointing devices- CH Products DT255 (With Lapis Lazuli ball), Razer Salmosa, Logitech MX400
Buckling Springs - IBM Model M 1391401 (1987) & IBM Model F AT
Cherry MX Blue Switches - iOne Scorpius M10 "otaku"(2009) & OCN-branded Ducky keyboard
Cherry MX Brown Switches - Compaq MX11800 & Cherry G80-8963LUBUS-2 (MX8100) & Filco FKBN91M/JB (Japanese Tenkeyless)

Cherry MX Black Switches -  US Micro Products Metal Keyboard USMP-KX065-TB-USB-A
Fake Cherry MX White Switches - Qtronix Scorpius 32 keypad &  Chicony KB-5191
White round SMK Switches - Gold VTech label keyboard
SMK blue Monterrey Switches - Chicony KB-5181
Damped tactile ALPS - Apple AEKII
Blue NEC Switches - NEC APC-H412


Quote from: bigpook;129625
: ) life is like a box of webwit. you never know what you are going to get.



Offline skriefal

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Mitsumi Keyboard
« Reply #1 on: Thu, 25 June 2009, 19:14:55 »
I see those frequently at local thrift shops.  They didn't seem like anything special, but I'll perhaps look more closely the next time I make the rounds.

Offline timw4mail

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Mitsumi Keyboard
« Reply #2 on: Thu, 25 June 2009, 19:29:05 »
Quote from: skriefal;99242
I see those frequently at local thrift shops.  They didn't seem like anything special, but I'll perhaps look more closely the next time I make the rounds.


Before I discovered how good my Model M really was, one of these was my main keyboard. It was the first keyboard that I liked better than others.
Pointing devices- CH Products DT255 (With Lapis Lazuli ball), Razer Salmosa, Logitech MX400
Buckling Springs - IBM Model M 1391401 (1987) & IBM Model F AT
Cherry MX Blue Switches - iOne Scorpius M10 "otaku"(2009) & OCN-branded Ducky keyboard
Cherry MX Brown Switches - Compaq MX11800 & Cherry G80-8963LUBUS-2 (MX8100) & Filco FKBN91M/JB (Japanese Tenkeyless)

Cherry MX Black Switches -  US Micro Products Metal Keyboard USMP-KX065-TB-USB-A
Fake Cherry MX White Switches - Qtronix Scorpius 32 keypad &  Chicony KB-5191
White round SMK Switches - Gold VTech label keyboard
SMK blue Monterrey Switches - Chicony KB-5181
Damped tactile ALPS - Apple AEKII
Blue NEC Switches - NEC APC-H412


Quote from: bigpook;129625
: ) life is like a box of webwit. you never know what you are going to get.



Offline ch_123

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Mitsumi Keyboard
« Reply #3 on: Thu, 25 June 2009, 19:38:03 »
Im pretty sure someone around here posted about them before. As far as I remember, they are just really well made rubber dome boards, not much more.

I think it's good to have a cheapo board of choice that is reasonably quiet, and that you can bring places without fearing losing $100+ worth of keyboard. The IBM M4-1 seems to be the weapon of choice around here for that task.

Offline patrickgeekhack

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Mitsumi Keyboard
« Reply #4 on: Fri, 26 June 2009, 13:23:35 »
Sorry to ruin the party, but Mitsumi is the one keyboard I avoid at all cost.  I just hate the keyfeel (not the sound).

Offline lowpoly

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Mitsumi Keyboard
« Reply #5 on: Fri, 26 June 2009, 15:05:19 »
Some versions of the AEKII and some versions of the Zenith ZKB2 contain Mitsumi mechanical switches.

Miniguru thread at GH, preview site at guru-board.com
The Apple M0110 Today

Offline watduzhkstand4

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Mitsumi Keyboard
« Reply #6 on: Fri, 26 June 2009, 15:06:14 »
just wondering, what keyboards do you currently have timw4mail?
KEYBOARDS
Cherry Blue *Filco Tenkeyless w/ blank keys* w/ red ESC key thanks to Megarat
Cherry Red Noppoo Choc Mini
IBM Model M 1391401 12/15/88
Siig Minitouch w/ White Alps


SOLD
HHKB Pro 2 white w/ blank keys red ESC key and blank WASD keys
HHKB L-2
Cherry Brown Compaq mx11800
Dell AT101W
Cherry Red Leopold 104-key Otaku FC500RR/ABN

Offline itlnstln

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Mitsumi Keyboard
« Reply #7 on: Fri, 26 June 2009, 15:32:59 »
Quote from: lowpoly;99432
Some versions of the AEKII and some versions of the Zenith ZKB2 contain Mitsumi mechanical switches.

I had an AEKII with Mitsumi switches.  They weren't too bad.


Offline timw4mail

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Mitsumi Keyboard
« Reply #8 on: Fri, 26 June 2009, 17:44:44 »
Quote from: watduzhkstand4;99433
just wondering, what keyboards do you currently have timw4mail?


I should probably add them to my sig...shouldn't I?

Well, I've got a Model M1391401 Vintage 1987, and a iOne Scorpius M10, as far as mechanical boards go.

I've got an Apple Aluminum keyboard, and blue iMac keyboard (that one sucks).
Also, I've got a cheapo Dynex Keyboard, just for spare use, and one of those amusing, but horrid to use silicone "bendy" keyboards.

I'll have to find my camera and add pictures! (Although I can't get a picture of my Scorpius...as its at work, and they don't really like cameras in the office.)
Pointing devices- CH Products DT255 (With Lapis Lazuli ball), Razer Salmosa, Logitech MX400
Buckling Springs - IBM Model M 1391401 (1987) & IBM Model F AT
Cherry MX Blue Switches - iOne Scorpius M10 "otaku"(2009) & OCN-branded Ducky keyboard
Cherry MX Brown Switches - Compaq MX11800 & Cherry G80-8963LUBUS-2 (MX8100) & Filco FKBN91M/JB (Japanese Tenkeyless)

Cherry MX Black Switches -  US Micro Products Metal Keyboard USMP-KX065-TB-USB-A
Fake Cherry MX White Switches - Qtronix Scorpius 32 keypad &  Chicony KB-5191
White round SMK Switches - Gold VTech label keyboard
SMK blue Monterrey Switches - Chicony KB-5181
Damped tactile ALPS - Apple AEKII
Blue NEC Switches - NEC APC-H412


Quote from: bigpook;129625
: ) life is like a box of webwit. you never know what you are going to get.



Offline ch_123

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Mitsumi Keyboard
« Reply #9 on: Fri, 26 June 2009, 17:48:28 »
You use a Blue Cherry board at work? Your co-workers must love you...

Offline timw4mail

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Mitsumi Keyboard
« Reply #10 on: Fri, 26 June 2009, 17:49:15 »
Quote from: ch_123;99474
You use a Blue Cherry board at work? Your co-workers must love you...


Well, its certainly quieter than a Model M... I haven't gotten too many complaints.
Pointing devices- CH Products DT255 (With Lapis Lazuli ball), Razer Salmosa, Logitech MX400
Buckling Springs - IBM Model M 1391401 (1987) & IBM Model F AT
Cherry MX Blue Switches - iOne Scorpius M10 "otaku"(2009) & OCN-branded Ducky keyboard
Cherry MX Brown Switches - Compaq MX11800 & Cherry G80-8963LUBUS-2 (MX8100) & Filco FKBN91M/JB (Japanese Tenkeyless)

Cherry MX Black Switches -  US Micro Products Metal Keyboard USMP-KX065-TB-USB-A
Fake Cherry MX White Switches - Qtronix Scorpius 32 keypad &  Chicony KB-5191
White round SMK Switches - Gold VTech label keyboard
SMK blue Monterrey Switches - Chicony KB-5181
Damped tactile ALPS - Apple AEKII
Blue NEC Switches - NEC APC-H412


Quote from: bigpook;129625
: ) life is like a box of webwit. you never know what you are going to get.



Offline ch_123

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Mitsumi Keyboard
« Reply #11 on: Fri, 26 June 2009, 17:57:21 »
I find there's a certain "quality over quantity" thing when it comes to noise. I don't think the average person has a problem with keyboards that make a lot of noise, afterall there are loads of loud rubber dome cheapo boards around, but moreso the sort of noise it makes (that's not to say that loudness is not an issue, just not necessarily the most important one when it comes to sound).

The Model F is widely considered to be one of, if not the most loud keyboards that people around here use, yet I'd feel much less conscious of using it around people than my Blue Cherry Filco, because the Model F makes a relatively pleasing (though very loud) metallic ping, whereas the Filco sounds like you're snapping biros (ballpoint pen to you Americans out there). I'd imagine people would get annoyed by that noise far more easier compared with the noise of buckling springs.

That said, the Scorpious is meant to be the quietest Blue Cherry board out there, maybe if you had a Filco you'd have some issues on your hand :D

Offline timw4mail

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Mitsumi Keyboard
« Reply #12 on: Fri, 26 June 2009, 18:04:58 »
Quote from: ch_123;99478
I find there's a certain "quality over quantity" thing when it comes to noise. I don't think the average person has a problem with keyboards that make a lot of noise, afterall there are loads of loud rubber dome cheapo boards around, but moreso the sort of noise it makes (that's not to say that loudness is not an issue, just not necessarily the most important one when it comes to sound).

The Model F is widely considered to be one of, if not the most loud keyboards that people around here use, yet I'd feel much less conscious of using it around people than my Blue Cherry Filco, because the Model F makes a relatively pleasing (though very loud) metallic ping, whereas the Filco sounds like you're snapping biros (ballpoint pen to you Americans out there). I'd imagine people would get annoyed by that noise far more easier compared with the noise of buckling springs.

That said, the Scorpious is meant to be the quietest Blue Cherry board out there, maybe if you had a Filco you'd have some issues on your hand :D


I just got the cheapest tactile board I could afford (That had Windows keys, I work on a Mac), because the ones available at work were just not cutting it. I resorted to using my Apple Aluminum for a while, but that doesn't feel great for very long.
Pointing devices- CH Products DT255 (With Lapis Lazuli ball), Razer Salmosa, Logitech MX400
Buckling Springs - IBM Model M 1391401 (1987) & IBM Model F AT
Cherry MX Blue Switches - iOne Scorpius M10 "otaku"(2009) & OCN-branded Ducky keyboard
Cherry MX Brown Switches - Compaq MX11800 & Cherry G80-8963LUBUS-2 (MX8100) & Filco FKBN91M/JB (Japanese Tenkeyless)

Cherry MX Black Switches -  US Micro Products Metal Keyboard USMP-KX065-TB-USB-A
Fake Cherry MX White Switches - Qtronix Scorpius 32 keypad &  Chicony KB-5191
White round SMK Switches - Gold VTech label keyboard
SMK blue Monterrey Switches - Chicony KB-5181
Damped tactile ALPS - Apple AEKII
Blue NEC Switches - NEC APC-H412


Quote from: bigpook;129625
: ) life is like a box of webwit. you never know what you are going to get.



Offline timw4mail

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Pointing devices- CH Products DT255 (With Lapis Lazuli ball), Razer Salmosa, Logitech MX400
Buckling Springs - IBM Model M 1391401 (1987) & IBM Model F AT
Cherry MX Blue Switches - iOne Scorpius M10 "otaku"(2009) & OCN-branded Ducky keyboard
Cherry MX Brown Switches - Compaq MX11800 & Cherry G80-8963LUBUS-2 (MX8100) & Filco FKBN91M/JB (Japanese Tenkeyless)

Cherry MX Black Switches -  US Micro Products Metal Keyboard USMP-KX065-TB-USB-A
Fake Cherry MX White Switches - Qtronix Scorpius 32 keypad &  Chicony KB-5191
White round SMK Switches - Gold VTech label keyboard
SMK blue Monterrey Switches - Chicony KB-5181
Damped tactile ALPS - Apple AEKII
Blue NEC Switches - NEC APC-H412


Quote from: bigpook;129625
: ) life is like a box of webwit. you never know what you are going to get.



Offline ch_123

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Mitsumi Keyboard
« Reply #14 on: Fri, 26 June 2009, 18:55:21 »
You'd have to ask the seller to pull a keycap off and take a pic. Google doesnt say anything about them

Offline timw4mail

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Mitsumi Keyboard
« Reply #15 on: Fri, 26 June 2009, 19:05:15 »
Quote from: ch_123;99495
You'd have to ask the seller to pull a keycap off and take a pic. Google doesnt say anything about them


I asked the seller.

How are SMK switches? Here's a board with them:
http://cgi.ebay.com/Vintage-VTECH-Clicky-Keyboard-Gold-Logo-SMK-Keyswitches_W0QQitemZ300325140087QQcmdZViewItemQQptZPCA_Mice_Trackballs?hash=item45ecc5f677&_trksid=p4634.c0.m14.l1262&_trkparms=|301%3A0|293%3A1|294%3A30
Pointing devices- CH Products DT255 (With Lapis Lazuli ball), Razer Salmosa, Logitech MX400
Buckling Springs - IBM Model M 1391401 (1987) & IBM Model F AT
Cherry MX Blue Switches - iOne Scorpius M10 "otaku"(2009) & OCN-branded Ducky keyboard
Cherry MX Brown Switches - Compaq MX11800 & Cherry G80-8963LUBUS-2 (MX8100) & Filco FKBN91M/JB (Japanese Tenkeyless)

Cherry MX Black Switches -  US Micro Products Metal Keyboard USMP-KX065-TB-USB-A
Fake Cherry MX White Switches - Qtronix Scorpius 32 keypad &  Chicony KB-5191
White round SMK Switches - Gold VTech label keyboard
SMK blue Monterrey Switches - Chicony KB-5181
Damped tactile ALPS - Apple AEKII
Blue NEC Switches - NEC APC-H412


Quote from: bigpook;129625
: ) life is like a box of webwit. you never know what you are going to get.



Offline patrickgeekhack

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Mitsumi Keyboard
« Reply #16 on: Fri, 26 June 2009, 19:08:02 »
I should have stressed that it's the rubber dome Mistumi that I don't like. I have never tried the mechanical Mitsumi. I would not hate the mechanical Mitsumi, that's for sure.

Offline timw4mail

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Mitsumi Keyboard
« Reply #17 on: Fri, 26 June 2009, 19:11:05 »
Quote from: patrickgeekhack;99506
I should have stressed that it's the rubber dome Mistumi that I don't like. I have never tried the mechanical Mitsumi. I would not hate the mechanical Mitsumi, that's for sure.

That's fine. I can't stand those stupid new weirdly-shaped Dell keyboards...yech! They are about as mushy as they come.

Pointing devices- CH Products DT255 (With Lapis Lazuli ball), Razer Salmosa, Logitech MX400
Buckling Springs - IBM Model M 1391401 (1987) & IBM Model F AT
Cherry MX Blue Switches - iOne Scorpius M10 "otaku"(2009) & OCN-branded Ducky keyboard
Cherry MX Brown Switches - Compaq MX11800 & Cherry G80-8963LUBUS-2 (MX8100) & Filco FKBN91M/JB (Japanese Tenkeyless)

Cherry MX Black Switches -  US Micro Products Metal Keyboard USMP-KX065-TB-USB-A
Fake Cherry MX White Switches - Qtronix Scorpius 32 keypad &  Chicony KB-5191
White round SMK Switches - Gold VTech label keyboard
SMK blue Monterrey Switches - Chicony KB-5181
Damped tactile ALPS - Apple AEKII
Blue NEC Switches - NEC APC-H412


Quote from: bigpook;129625
: ) life is like a box of webwit. you never know what you are going to get.



Offline skriefal

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Mitsumi Keyboard
« Reply #18 on: Fri, 26 June 2009, 19:13:09 »
Quote from: timw4mail;99481
Speaking of mitsumi keyboards, is this one mechanical?

http://cgi.ebay.com/MITSUMI-Clicky-Clickety-Click-AT-XT-Keyboard-KPQ-E99YC_W0QQitemZ270413236376QQcmdZViewItemQQptZPCA_Mice_Trackballs?hash=item3ef5e28898&_trksid=p3286.c0.m14&_trkparms=65%3A15|66%3A2|39%3A1|240%3A1318|301%3A1|293%3A1|294%3A50

Nope.  That uses a buckling rubber sleeve, similar to the IBM M4.  The one sitting on a shelf in my basement does, anyway. :)

Offline skriefal

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Mitsumi Keyboard
« Reply #19 on: Fri, 26 June 2009, 19:16:19 »
Quote from: timw4mail;99503
I asked the seller.

How are SMK switches? Here's a board with them:
http://cgi.ebay.com/Vintage-VTECH-Clicky-Keyboard-Gold-Logo-SMK-Keyswitches_W0QQitemZ300325140087QQcmdZViewItemQQptZPCA_Mice_Trackballs?hash=item45ecc5f677&_trksid=p4634.c0.m14.l1262&_trkparms=|301%3A0|293%3A1|294%3A30


The round SMKs are a lot like Cherry blue switches, but with a lower-pitched click.  Quite nice actually.

Offline ch_123

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Mitsumi Keyboard
« Reply #20 on: Fri, 26 June 2009, 19:22:03 »
I thought those were the Blue SMKs that looked kinda like Alps switches? Or are they the same?

Offline alpslover

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Mitsumi Keyboard
« Reply #21 on: Fri, 26 June 2009, 19:27:20 »
Quote from: skriefal;99514
The round SMKs are a lot like Cherry blue switches, but with a lower-pitched click.  Quite nice actually.


yes, they're similar to blue cherries - light and crisp, but more tactile.  switch actuation is closer to the end of key travel than with the cherries.  2/3 to 3/4 of the way down vs. 1/2.

Offline timw4mail

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Mitsumi Keyboard
« Reply #22 on: Fri, 26 June 2009, 19:28:08 »
Quote from: alpslover;99516
yes, they're similar to blue cherries - light and crisp, but more tactile.  switch actuation is closer to the end of key travel than with the cherries.  2/3 to 3/4 of the way down vs. 1/2.

Hmm...I'm definitely thinking about it then, might as well have something at home that similar to at work...
Pointing devices- CH Products DT255 (With Lapis Lazuli ball), Razer Salmosa, Logitech MX400
Buckling Springs - IBM Model M 1391401 (1987) & IBM Model F AT
Cherry MX Blue Switches - iOne Scorpius M10 "otaku"(2009) & OCN-branded Ducky keyboard
Cherry MX Brown Switches - Compaq MX11800 & Cherry G80-8963LUBUS-2 (MX8100) & Filco FKBN91M/JB (Japanese Tenkeyless)

Cherry MX Black Switches -  US Micro Products Metal Keyboard USMP-KX065-TB-USB-A
Fake Cherry MX White Switches - Qtronix Scorpius 32 keypad &  Chicony KB-5191
White round SMK Switches - Gold VTech label keyboard
SMK blue Monterrey Switches - Chicony KB-5181
Damped tactile ALPS - Apple AEKII
Blue NEC Switches - NEC APC-H412


Quote from: bigpook;129625
: ) life is like a box of webwit. you never know what you are going to get.



Offline timw4mail

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Mitsumi Keyboard
« Reply #23 on: Fri, 26 June 2009, 19:59:05 »
Quote from: timw4mail;99517
Hmm...I'm definitely thinking about it then, might as well have something at home that similar to at work...


I just purchased a new keyboard! It has SMK switches!
Pointing devices- CH Products DT255 (With Lapis Lazuli ball), Razer Salmosa, Logitech MX400
Buckling Springs - IBM Model M 1391401 (1987) & IBM Model F AT
Cherry MX Blue Switches - iOne Scorpius M10 "otaku"(2009) & OCN-branded Ducky keyboard
Cherry MX Brown Switches - Compaq MX11800 & Cherry G80-8963LUBUS-2 (MX8100) & Filco FKBN91M/JB (Japanese Tenkeyless)

Cherry MX Black Switches -  US Micro Products Metal Keyboard USMP-KX065-TB-USB-A
Fake Cherry MX White Switches - Qtronix Scorpius 32 keypad &  Chicony KB-5191
White round SMK Switches - Gold VTech label keyboard
SMK blue Monterrey Switches - Chicony KB-5181
Damped tactile ALPS - Apple AEKII
Blue NEC Switches - NEC APC-H412


Quote from: bigpook;129625
: ) life is like a box of webwit. you never know what you are going to get.



Offline skriefal

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Mitsumi Keyboard
« Reply #24 on: Fri, 26 June 2009, 20:22:08 »
Quote from: ch_123;99515
I thought those were the Blue SMKs that looked kinda like Alps switches? Or are they the same?


They're not the same.  The square blue SMKs are closer in feel and sound to Alps white switches and are compatible with Alps keycaps.  The round white SMKS are closer in feel and sound to Cherry white/blue switches and are compatible with Cherry keycaps.  Apparently SMK was copying both Cherry and Alps...

Offline lowpoly

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Mitsumi Keyboard
« Reply #25 on: Sat, 27 June 2009, 15:56:30 »
Quote from: timw4mail;99481
Speaking of mitsumi keyboards, is this one mechanical?
Looks like the key area is bent (in cross section). That usually means there is no switch pcb.

Miniguru thread at GH, preview site at guru-board.com
The Apple M0110 Today

Offline smarmar

  • Posts: 140
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Re: Mitsumi Keyboard
« Reply #26 on: Fri, 08 August 2014, 13:10:57 »
One of my Mitsumis is like the one in the top photo. It's definitely rubber dome but I agree that it does have a "special/not-so-annoying" feel to the keys as other rubber dome kbs. It's the lightest kb in the universe, very cheap but a good backup that can be thrown into a backpack. I painted it bright yellow with a rainbow and clouds over the arrow keys and gifted it to a friend ;P
1992 IBM Model M | Tesoro Durandal [Browns] | Hi-Tek RT-101 [NMB AT/XT] | Matias Tactile Pro 3 [Alps] | Tandy Enhanced [Sliders] | Dell Quiet Keys | Mitsumi [AT]

Offline TotalChaos

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Re: Mitsumi Keyboard
« Reply #27 on: Fri, 08 August 2014, 13:20:23 »
That's fine. I can't stand those stupid new weirdly-shaped Dell keyboards...yech! They are about as mushy as they come.

Show Image

Any chance you could stack nickels on one of the keys and see how many nickels it takes to press a key down?

I really really want a light mushy rubberdome to try out.
Rosewill RK-9000RE #1 (Broke on day 26, fixed with Scotch Tape on day 42, barely holding together)
Rosewill RK-9000RE #2 (Lubed, still in the box.  I am afraid to use it because it will break like the first one)

Offline SpAmRaY

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Re: Mitsumi Keyboard
« Reply #28 on: Fri, 08 August 2014, 13:26:39 »
That's fine. I can't stand those stupid new weirdly-shaped Dell keyboards...yech! They are about as mushy as they come.

Show Image

Any chance you could stack nickels on one of the keys and see how many nickels it takes to press a key down?

I really really want a light mushy rubberdome to try out.


OP hasn't logged in since November 2013.....thread is from 2009......:facepalm:

Offline TotalChaos

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Re: Mitsumi Keyboard
« Reply #29 on: Fri, 08 August 2014, 13:33:56 »
I wandered into this thread because I thought it was going to be about Mitsumi Mechanical keyswitches.  AFAIK I don't know anything about Mitsumi rubberdomes.

The best switches I ever typed on were Mitsumi mechanical switches contained in millions of Commdore 64 computers and the first few 100,000 Amiga 500s.  The Amiga 500 keyboard was a lot nicer than the little C64 one.  Later on, the Amiga keyboards were switched to rubberdomes by an evil "manager".

The Mitsumi mechanical switches were softer and gentler and quieter than the Matias "World's Quietest Mechanical Switch".   Mitsumi Mechanical Switches are wonderfully ergonomic keyswitches.
Rosewill RK-9000RE #1 (Broke on day 26, fixed with Scotch Tape on day 42, barely holding together)
Rosewill RK-9000RE #2 (Lubed, still in the box.  I am afraid to use it because it will break like the first one)

Offline TotalChaos

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Re: Mitsumi Keyboard
« Reply #30 on: Fri, 08 August 2014, 13:37:14 »
OP hasn't logged in since November 2013.....thread is from 2009......:facepalm:
He is in an elliptical orbit.  He will be swinging back around.  Don't worry.  Geekhack has a lot of gravity. :D
Rosewill RK-9000RE #1 (Broke on day 26, fixed with Scotch Tape on day 42, barely holding together)
Rosewill RK-9000RE #2 (Lubed, still in the box.  I am afraid to use it because it will break like the first one)

Offline Daniel Beardsmore

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Re: Mitsumi Keyboard
« Reply #31 on: Sun, 10 August 2014, 06:01:40 »
The best switches I ever typed on were Mitsumi mechanical switches contained in millions of Commdore 64 computers and the first few 100,000 Amiga 500s.

The only C64 keyboard I am aware of is a linear Mitsumi "hybrid" switch. The "hybrid" switch has sliders bearing a rubber block suspended on a flexible strip. This block can be small, used to press a membrane sheet against a PCB or another membrane sheet, or it can be large and conductive, for conducting electricity across a PCB or membrane. There's quite a few varieties of the design.

The Commodore 64 keyboard is PCB with conductive blocks, in every instance I've ever seen. You can see some pictures here; the guy has forgotten to include the springs under the keycaps:

http://www.the-liberator.net/site-files/retro-games/hardware/Commodore-64/commodore-64-classic-brown-england-rev-a.htm

I have a C64 keyboard, but it's incredibly filthy and needs a deep clean before it's suitable to be stripped down and photographed for the wiki.

Early Amiga 500 keyboards had NMB Hi-Tek "space invader" switches, which were also linear. These were replaced with linear Mitsumi "hybrid" switches very similar to those in the Commodore 64. Can't find much in the way of photos of the Mitsumi switches in the A500, but there is one here that might be an A500:

http://eab.abime.net/showthread.php?t=31893

It's the newer Mitsumi mount design.
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