3 Apr
2011
3 Apr
'11
2:27 p.m.
On Sun, 3 Apr 2011, Mike Loewen wrote:
On Mon, 4 Apr 2011, terry stewart wrote:
Thanks for the detailed input, Mike! As it turns out, the Lisa keyboard
foam is not degraded at all. Must be the luck of the draw.
--
Re: the Keyboard.
All three of my Lisa Keyboards had degraded foam pads so much so that
between the three of them only one key worked! However, the computer still
registered a keyboard as being present.
Alll three keyboards are working now. I got my replacement pads off Erik
Klein, who is a member of this forum. He might have some more left.
TRS-80 Model II, 16 and 6000s all use the same type of foam pads, and you
can make them yourself. I rebuilt a Model II keyboard using the instructions
on this page as a guideline:
http://www.solivant.com/sol20kbd/
Another link on that page claims that Sun Type 4 keyboards can be used as
donors for the pads.
I used a 7/16" hollow punch from Grizzly to cut the pads:
http://www.grizzly.com/products/6-pc-Hollow-Punch-Set/G9845
I've also had success with a punch similar to this:
http://www.semielectronics.com/store/index.php?main_page=product_info&c…
And an emergency mylar blanket from WalMart.
I used 5mm track bed foam from Woodland Scenics, available at your local
hobby shop. The resulting pads are a little stiffer than the original, but
perfectly usable. I used the original plastic discs (after cleaning them),
and glued the mylar, foam and plastic together with Elmer's Rubber Cement.
It's tedious, but it works.