The TRS-80 Journey Continues
cisin at xenosoft.com
Wed May 25 10:33:02 CDT 2022
On Wed, 25 May 2022, Bill Gunshannon via cctalk wrote:
> Another question for the masters here.
> I just tried to revive my Model III. More than half the
> keys don't work anymore. What is the conventional wisdom
> on cleaning these old TRS-80 keyboards? Is compressed air
> usually enough? Can I spray the switches with something
> like DeOxit safely? I expect when I go to revive my
> Model I's they are likely to be in the same state.
A really stupid suggestion: (cleaning the key mechanisms makes more
More than a quarter of a century ago, I revived several of my TRS-80's.
None of the keys worked on one keyboard, and many of the keys didn't work
on another. But, I noticed that repeatedly pressing an intermittent key
made it work reliably, and repeatedly pressing a "dead" key got it
I had a Rochester Dynatyper and a KGS-80, which were the two most
common versions of a box of solenoids to place on top of a typewriter to
convert it into a printer. Those came out when there were no cheap
printers. There also existed a box, made by an outfit in Walnut Creek,
to put UNDER a Selectric that pulled down on the keys, but I neever had
one of those, and that was ONLY for Selectric, whereas the Rochester
Dynatyper and the KGS-80 worked on ANYTHING with a normal keyboard, even a
Merganthaler! I remember once at the West Coast Computer Faire, somebody
showed a prototype of one that used fishing line and pulleys to work the
carriage return of a MANUAL (non-electric) typewriter - every successful
carriage return got a round of applause.
I used the Dynatyper and the KGS-80 to "type" a few hundred pages.
The TRS-80 keyboards came back to life!
Grumpy Ol' Fred
More information about the cctalk