RE: Compaq foam rot keyboard SOLVED

2017-01-24 Thread Electronics Plus 

-Original Message-
From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Al Kossow
Sent: Tuesday, January 24, 2017 10:16 AM
To: cctalk@classiccmp.org
Subject: Re: Compaq foam rot keyboard SOLVED



On 1/24/17 12:24 AM, Randy Dawson wrote:
> take a look in you junk bin for a IBM PC compatible keyboard, it worked
for me.
> 

The BTC 5339R is a bit more common on eBay and is foam and foil
https://geekhack.org/index.php?topic=77030.msg1935636#msg1935636

I didn't see it anywhere on geekhack, it would be nice if they had a table
of what BTC keyboards were foam and foil.

https://deskthority.net/wiki/Category:BTC_keyboards
https://deskthority.net/wiki/BTC_foam_and_foil

DT will tell you which ones are foam and foil.

Re: Compaq foam rot keyboard SOLVED

2017-01-24 Thread Al Kossow 


On 1/24/17 12:24 AM, Randy Dawson wrote:
> take a look in you junk bin for a IBM PC compatible keyboard, it worked for 
> me.
> 

The BTC 5339R is a bit more common on eBay and is foam and foil
https://geekhack.org/index.php?topic=77030.msg1935636#msg1935636

I didn't see it anywhere on geekhack, it would be nice if they had a table of 
what
BTC keyboards were foam and foil.

Compaq foam rot keyboard SOLVED

2017-01-24 Thread Randy Dawson 
I posted yesterday about my attempt to weld a IBM PC keyboard to my Compaq 
model 1 - the 'luggable'.


Well, it did not work, even though I saw clock and data on both Compaq and IBM 
keyboards that looked the same.  I did not dig into the decoding, but somehow 
they are different.


OK so I already cut into the PC keyboard, a BTC 5100.  I let my son play with 
it and a screwdriver, and as he gets it apart, I see capacitive foam pads 
inside.


Well guess what, they are the same size and fit for the Compaq Keytronics 
keyboard!


I popped out all the pads and transplanted them, you push them in and snap the 
plastic disk in the guides with an exacto, and they work perfectly.


I think a lot of these early keyboards before the switch to elastomeric rubber 
have these foam pads, and they are a standard size.


If you are stuck with a Tandy, Lisa, Sun with keyboard foam rot, take a look in 
you junk bin for a IBM PC compatible keyboard, it worked for me.


Randy