Re: keycaps / switches for Tek 4006

[Fritz Mueller via cctalk]

After a little more research on the net tonight: it looks like the keyboard in 
the 4006 was pretty much one of Cherry's standard "B70 ASR" models.  The key 
mechs are known as M7 T-mount, and the caps look like the standard double shot 
ones supplied by Cherry in their mid to late 70's catalogs.

A lot of the Tek terminals I've seen for sale seem to be missing a few teeth; I 
guess these caps didn't hold on well enough to weather the decades without a 
few from most keyboards getting lost along the way.  It's probably worth 
working up some 3D models for these caps.

Also, keyboard research turns up some sad, sad, things... B... :-(

--FritzM.

Re: keycaps / switches for Tek 4006

[Fritz Mueller via cctalk]

> Can you take a picture of the switches?
> Cindy

Some pics of they keyboard assembly, key cap underside, key mechs, and also the 
power toggle I'd like to replace, are here:

https://drive.google.com/open?id=1dKBOdhwgpedYpYCKbGxrd3P9jCNwBRs5 

https://drive.google.com/open?id=1U__BCVWJQgP-s0ZrPMBWQ21LWM2jsWjP 

https://drive.google.com/open?id=1hh-SXbyIW_hjeMZnbVZzx56-VRwFBcDM 


https://drive.google.com/open?id=17YNPFk9KUm4mZnjAV3EFCY09JXASNMtI 


thanks,
   --FritzM.

Re: keycaps / switches for Tek 4006

[Liam Proven via cctalk]

On Fri, 26 Jul 2019 at 02:40, Fritz Mueller via cctalk
 wrote:
>
> After disassembly, I can see the keyboard assembly are marked "Cherry" and 
> part number is B76-07AA.  I'm not enough of a keyboard wonk to know if these 
> are still-mfg'd cherry key mechanisms?

Cheery are still around. Ask them?

https://www.cherry.co.uk/service-downloads/contact.html

https://www.cherryamericas.com/contact/

https://www.cherry.co.uk/imprint

-- 
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Re: keycaps / switches for Tek 4006

[Cindy Croxton via cctalk]

On 7/25/19 7:40 PM, Fritz Mueller via cctalk wrote:



On Jul 25, 2019, at 10:29 AM, Fritz Mueller  wrote:

I recently obtained a Tek 4006 from eBay as a repair/restoration project.  It 
is missing a few keycaps (both SHIFT keycaps, COPY, LINE FEED, and :/*).  In 
addition, one of the key mechanisms has a broken plunger.  Last, the little 
green paddle line power toggle power switch at the back appears to be broken.

After disassembly, I can see the keyboard assembly are marked "Cherry" and part 
number is B76-07AA.  I'm not enough of a keyboard wonk to know if these are still-mfg'd 
cherry key mechanisms?

The keycaps look like glossy dark gray / white double-shot deals...

--FritzM.


Can you take a picture of the switches?

Cindy

Re: keycaps / switches for Tek 4006

[Jon Elson via cctalk]

On 07/25/2019 07:40 PM, Fritz Mueller via cctalk wrote:



On Jul 25, 2019, at 10:29 AM, Fritz Mueller  wrote:

I recently obtained a Tek 4006 from eBay as a repair/restoration project.  It 
is missing a few keycaps (both SHIFT keycaps, COPY, LINE FEED, and :/*).  In 
addition, one of the key mechanisms has a broken plunger.  Last, the little 
green paddle line power toggle power switch at the back appears to be broken.

After disassembly, I can see the keyboard assembly are marked "Cherry" and part 
number is B76-07AA.  I'm not enough of a keyboard wonk to know if these are still-mfg'd 
cherry key mechanisms?


I'm pretty sure Cherry is not still making these keyboards.  
But, there were a HELL of a lot of them made over the 
years.  There were several key switch styles in use - really 
cheap plunger that spreads the contacts apart when up, a 
magnet and reed switch type, a Hall sensor type, and maybe a 
capacitance type.  The key switches should be able to be 
replaced fairly easily.  Special keycaps will be a harder 
problem to solve.


Jon

Re: keycaps / switches for Tek 4006

[Fritz Mueller via cctalk]

> On Jul 25, 2019, at 10:29 AM, Fritz Mueller  wrote:
> 
> I recently obtained a Tek 4006 from eBay as a repair/restoration project.  It 
> is missing a few keycaps (both SHIFT keycaps, COPY, LINE FEED, and :/*).  In 
> addition, one of the key mechanisms has a broken plunger.  Last, the little 
> green paddle line power toggle power switch at the back appears to be broken.

After disassembly, I can see the keyboard assembly are marked "Cherry" and part 
number is B76-07AA.  I'm not enough of a keyboard wonk to know if these are 
still-mfg'd cherry key mechanisms?

The keycaps look like glossy dark gray / white double-shot deals...

--FritzM.