On Oct 23, 2010, at 11:07 AM, [email protected] wrote:

> On Oct 12, 8:12 pm, James Fraser <wheresthatistanbul-
> [email protected]> wrote:
>> Hello,
>> May I ask what particular version of the Kensington Trackball you have that 
>> has lasted so long?  Basically, I'm trying to work out what kind of useful 
>> life I might expect from a particular model.
>> 
>> I have both Version 3.0 (two button) and Version 5.0 (four button) 
>> Kensington trackballs on hand.
> 
> Sorry for the delay in responding. I am still using a Kensington Turbo
> Mouse Trackball for Macintosh Model #64210 Version 5. This is just an
> estimate, but this was heavily used from ~1998 to ~2003 used on

I have had similar results with the older Kensington trackballs, both
the ADB and Serial versions.  When I got rid of my last Mac that had
an ADB, I gave away the ten-or-more year old trackball.  When I got
rid of my PC, I found it wasn't possible to make the serial (RS-232)
trackball work with my USB macs, so got rid of it too.  

Now have their 4-button USB "Expert Mouse" trackball.  Sadly, unlike the
older models with their steel wheels for support it has nylon "nubbins" 
to hold the ball in place.  I think the lifetime warranty is now only 5 years
(anyone? I'm honestly too lazy to go look it up lol) and the build quality
on this new one is very much below that of those I had previously.  Only
time will tell if it will stand up for ten years or more, though I doubt it.
The use of nylon pibs to keep the ball is place makes it MUCH quieter
compared to the "Classic" models, and it has a scroll wheel, those are 
it's better points.  It also has *some* of the same feel as the older
models, but it's not nearly as heavily built.  

My favorite PC-type keyboard is the HEAVY, solid *click* keyboard that 
IBM used to build back when Kensington was still selling the heavy trackball
nearly 20 years ago, still have a couple those in use.  Nice positive feedback, 
like typing on a Selectric typewriter.  (remember typewriters?? wish I still 
had one!) Only ones similar I can find offered these days are industrial key-
boards costing several hundred dollars. 

Tom

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