Sources for 8b TTL keyboards (Keytronics)

[Bill Sudbrink]

Ethan Dicks wrote:
> 
> On Sat, Dec 6, 2008 at 6:30 AM, Ray Arachelian
> <ray at arachelian.com> wrote:
> > I've used double sided foam tape + aluminum foil
> > (yes the kind used for food) with a bit of scotch
> > tape over the foil to prevent shorting in repairing
> > Lisa keyboards.  Worked just nicely once they were
> > cut to the right circular shape.  Yes, the key feel
> > was off after that, but livable.
> >
> > http://lisafaq.sunder.net/lisafaq-hw-kb_repair.html
> 
> I'm sure the foam response is different (different
> density if nothing else), but after reading your
> experiences, I'd be inclined to work with aluminum tape.
> It is literally a roll of aluminum foil, pre-glued,
> wax-paper-backed.  I've used it quite successfully to make
> grounding strips on workbenches (just screw a wire to one
> end and run it to a ground bar via largish resistor).  It's
> at least as thick as household aluminum foil, and the glue
> is quite tacky - more tacky than the glues I've seen on
> double-sided foam tape.
> 
> Just a thought for another material that might be easier to
> work with than household foil, though what you used is
> arguably about the cheapest stuff you could find to do the
> job.  If you've had any difficulties working with it,
> consider the aluminum tape.
> 

If find that old Mylar party balloons (wikipedia says that
they are not in fact Mylar but metalized nylon film) used
with the foam (mounting) tape (the kind with adhesive on
both sides of the foam) gets good results.  Note that the
strength of the adhesive isn't really important as far as
I can tell... usage of the keyboard constantly reinforces
the bond.  The other advantage of the balloons is that they
are already plastic coated on one side, no requirement to
overtape it.

Bill