25 Jul
2019
25 Jul
'19
10:29 a.m.
Hi folks,
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.
Pinging here to see if anybody has spares of these in their collection which they'd be
willing to part with? Alternatively, recommendations on compatible key mechanisms/caps,
or even 3D models to print some temporary replacements would be appreciated!
cheers,
--FritzM.
25 Jul
25 Jul
5:40 p.m.
On Jul 25, 2019, at 10:29 AM, Fritz Mueller <fritzm
at fritzm.org> 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.
7:03 p.m.
On 07/25/2019 07:40 PM, Fritz Mueller via cctalk wrote:
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
On Jul 25, 2019, at 10:29 AM, Fritz Mueller
<fritzm at fritzm.org> 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?
8:40 p.m.
On 7/25/19 7:40 PM, Fritz Mueller via cctalk wrote:
Can you take a picture of the switches?
Cindy
On Jul 25, 2019, at 10:29 AM, Fritz Mueller
<fritzm at fritzm.org> 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.
26 Jul
26 Jul
4:34 p.m.
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=1dKBOdhwgpedYpYCKbGxrd3P9jCNwBRs5>
https://drive.google.com/open?id=1U__BCVWJQgP-s0ZrPMBWQ21LWM2jsWjP
<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=1hh-SXbyIW_hjeMZnbVZzx56-VRwFBcDM>
https://drive.google.com/open?id=17YNPFk9KUm4mZnjAV3EFCY09JXASNMtI
<https://drive.google.com/open?id=17YNPFk9KUm4mZnjAV3EFCY09JXASNMtI>
thanks,
--FritzM.
27 Jul
27 Jul
1:18 a.m.
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... Brrrr... :-(
--FritzM.
26 Jul
26 Jul
3:37 a.m.
On Fri, 26 Jul 2019 at 02:40, Fritz Mueller via cctalk
<cctalk at classiccmp.org> 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
--
Liam Proven - Profile: https://about.me/liamproven
Email: lproven at cix.co.uk - Google Mail/Hangouts/Plus: lproven at gmail.com
Twitter/Facebook/Flickr: lproven - Skype/LinkedIn: liamproven
UK: +44 7939-087884 - ?R (+ WhatsApp/Telegram/Signal): +420 702 829 053
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6 comments
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participants (4)
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elson＠pico-systems.com -
fritzm＠fritzm.org -
lproven＠gmail.com -
sales＠elecplus.com