[vcf-midatlantic] Tandy 6000HD lives!

[Jonathan Gevaryahu]

On 3/17/2019 8:59 PM, Mike Loewen via vcf-midatlantic wrote:
> On Sat, 16 Mar 2019, Jonathan Gevaryahu via vcf-midatlantic wrote:
>
>> On 3/16/2019 1:22 PM, David Gesswein via vcf-midatlantic wrote:
>>>  On Fri, Mar 15, 2019 at 01:06:10AM -0400, Mike Loewen via 
>>> vcf-midatlantic
>>>  wrote:
>>>>  The foil-and-foam Keytronics keyboard required a complete rebuild
>>>>  (disintegrating foam), and a Sun Type 4 keyboard was sacrificed to
>>>>  provide replacement pads.
>>>>
>>>  I have done the same steal pads to fix another keyboard since I didn't
>>>  have the time to make them myself. If you hadn't heard about them this
>>>  place sells ready to go pads. I bought a set to fix the donor but 
>>> haven't
>>>  tried them yet.
>>>
>>>  https://texelec.com/product/foam-capacitive-pads-keytronic/
>>>
>>>  .
>>>
>> Has anyone figured out a material which can be used to replace the 
>> original aluminized(?) paper discs from keytronic keyboards? The foam 
>> I know (vaguely) what type it originally was.
>>
>> I have four of them here (one kb3270 and three victor 9000 keyboards) 
>> where the foam has turned to goo and corroded away most of the metal 
>> on the discs, so I don't think they can be re-used.
>
>    Several people (me included) have used a "space blanket" from 
> WalMart as the mylar layer.  You have to make sure that the conductive 
> side is attached to the foam.
>
>    For whatever reason, the latest batch of pads I made didn't work 
> (only about 10% success rate) on the Tandy 6000 keyboard.

I'm not sure the original paper discs had any mylar on them at all, but 
I'm not certain. I've never for certain figured out what they were made 
of. Maybe some ex-keytronic employee knows...


>
>
> Mike Loewen                mloewen at cpumagic.scol.pa.us
> Old Technology                http://q7.neurotica.com/Oldtech/
>

-- 
Jonathan Gevaryahu
jgevaryahu at gmail.com
jgevaryahu at hotmail.com