PDP-8 case

From: Mike Cruse <mcruse_at_acm.org>
Date: Sat Dec 1 02:30:34 2001

Pete Turnbull wrote:

>On Nov 19, 21:04, ajp166 wrote:
>
>>I don't remember that foam as being conductive. Most conductive foams
>>tend to shred, those bits are not kind to the electronics.
>>
>
>Agreed:-) The brown stuff isn't much nicer after 15-30 years. I suspect
>someone before me had replaced foam that lost its resilience, and thought
>conductive foam would be better in some way.
>
>>From: Pete Turnbull <pete_at_dunnington.u-net.com>
>>
>>>I've been cleaning up my recently-acquired PDP-8/E, and I've had to
>>>
>remove
>
>>>the plastic foam from the inside of the lid, which was fairly horrible.
>>>I'm not sure what best to replace it with
>>>
>
>Thanmks to everyone who replied. I'll just use ordinary high-density foam.
> It's much cheaper than a couple of square feet of good quality conductive
>foam, which would be a bit thin anyway.
>
>
Good choice. Conductive foam (the black stuff at least) will also loose
it's integrity
over time and crumble. Especially when subjected to repetitive
mechanical stress. It
is not designed to last.

Mike
Received on Sat Dec 01 2001 - 02:30:34 GMT