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Re: May be silly question, but: Lost my qq(´) and qq(´) key

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On 2019.04.08 14:25, Dan Ritter wrote:
> IBM Buckling Spring: nobody knows, but there are a lot of
> keyboards still working 25-30 years later.
> 
> Cherry: 50 million.
> 
> https://www.cherrymx.de/_Resources/Persistent/e005dff11a2e406babe9e8718fec9fc8835bb9ce/EN_CHERRY_MX_BLUE_RGB.pdf
> 
> Kailh: 50 - 80 million.
> 
> http://www.kailh.com/en/Products/Mechanical_keyboard_switch/165.html
> 
> Matias ALPS: 50 million.
> 
> http://matias.ca/switches/click/
> 
> Gaterons may be as low as 20 million.
> 
> You can buy all of the above today, in keyboards ranging from
> about $60 to $450.

I had in mind a boxful of Logitech and Kessington keyboards purchased 
several years ago, as well as two Cherry purchased last year.

The Cherry specifications gave me high hopes regarding Cherry, and I 
paid a good price for the Cherry; but the switches of two of the three I 
purchased new are beginning to fail.

The old IBM you mention, of course, is of the category I mentioned, a 
design of another era.

As to keystroke specifications, I must question current test procedures. 
  In years past, I have experienced key plunger binding long before 
contact failure was evident.  Plunger design does not always take into 
account the reality of lateral force on the keycap.  The application of 
lubricant is no substitute for proper material selection regarding 
plunger and tube or body.  Nowadays, contact failure seems to be the 
primary failure mode.  Many factors must be considered in the design of 
a keyswitch.

Only with a warranty which provides advance replacement with no-charge 
delivery and return would I consider paying much over a hundred dollars 
for a keyboard.  When the cost of return shipping by UPS, FEDEX, or USPS 
is taken into account, a lifetime warranty on a $25 or $50 keyboard is 
meaningless.

RLH

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May be silly question, but: Lost my qq(´) and qq(´) key Martin <keine-eile@online.de> - 2019-04-08 12:40 +0200
  Re: May be silly question, but: Lost my qq(´) and qq(´) key Markus Schönhaber <debian-user@list-post.mks-mail.de> - 2019-04-08 12:50 +0200
    Re: May be silly question, but: Lost my qq(´) and qq(´) key Martin <keine-eile@online.de> - 2019-04-08 13:30 +0200
  Re: May be silly question, but: Lost my qq(´) and qq(´) key Eike Lantzsch <zp6cge@gmx.net> - 2019-04-08 14:10 +0200
    Re: May be silly question, but: Lost my qq(´) and qq(´) key Martin <keine-eile@online.de> - 2019-04-08 14:20 +0200
  Re: May be silly question, but: Lost my qq(´) and qq(´) key rlharris@oplink.net - 2019-04-08 20:30 +0200
    Re: May be silly question, but: Lost my qq(´) and qq(´) key Dan Ritter <dsr@randomstring.org> - 2019-04-08 21:30 +0200
      Re: May be silly question, but: Lost my qq(´) and qq(´) key rlharris@oplink.net - 2019-04-08 22:00 +0200
  Fixed: May be silly question, but: Lost my qq(´) and qq(´) key Martin <keine-eile@online.de> - 2019-04-11 10:30 +0200
    Re: Fixed: May be silly question, but: Lost my qq(´) and qq(´) key Reco <recoverym4n@enotuniq.net> - 2019-04-11 14:20 +0200

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