Tek 4109 terminal

[Kevin Handy]

Jules Richardson wrote:

>Minor problem, in that I found the keyboard's pretty hosed. It uses
>metal foil circles for the switch contacts; these are attached to the
>switch plungers via foam spacers which give he correct clearance and
>presumably help with the keyboard's feel...
>
>Unfortunately it's the same stuff normally used for fan filters, and has
>totally decayed :-( 
>
>I *might* have a bit of foam sheet of the right thickness from which I
>can cut replacements, but doing it for that many keys is going to take
>me a while! :)
>  
>
Go to a hobby shop (scrapbooking, etc.), and look at their selection
of paper punches. They often have a very large selection.
You may need to buy two (one for center hole,  one for outside
ring). I'd think they would handle thin foam fairly well.
Would by much easier and faster than trying to cut them out with
scissers or a knife.

>Hmm... I suppose if the self-tests are mouse driven I can run the
>keyboard with no keys just for the purpose of testing the terminal
>though (and short pads where necessary to simulate keypresses)  Thanks
>for the info! (I'd tried powering up with self-test held in, but not
>doing a reset with self-test held in :)
>  
>