7 Feb
2000
7 Feb
'00
1:20 p.m.
-----Original Message-----
From: Dwight Elvey <elvey(a)hal.com>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Monday, February 07, 2000 10:29 PM
Subject: Re[2]: The pure *hell* of restoring a PDP-8/S desktop.
I have been using engine gunk in minis for many years and have never had any
come back. I am dealing with dirt/crud so thick that you couldn't get it off
with just scrubbing. After the engine gunk I vacuum out the backplane, then
use contact cleaner. I have never had a problem or a bad contact after that.
This should only be used in minis where regulart contact cleaner fails. I
have rarely had to use it because most minis come out of labs and are very
clean. This mini has been sitting in a warehouse, unprotected for at least
25 years. The dirt was so thick on the negibus cables that I had to soak
them in a tub for 4 hours and scrap the dirt off in layers. Looks like a
millions $$ now but was disgusting to even handle before. Amazing how much
dust and garbage something can accumulate over 20+ years.
(it's been running 10 hours now without problems :-) )
john
PDP-8 and other rare mini computers
http://www.pdp8.com
Edward Taussig <taussig(a)arpanet.com> wrote:
> Hi. Stabilant 22 was touted highly by Jerry Pournelle in Byte magazine
> as a contact enhancer, it might help after a good de-gunking.
> http://www.stabilant.com/
>
> http://www.byte.com/art/9705/sec13/art1.htm
> "Stabilant 22, the miracle all-purpose contact enhancer. It not only
makes
> for better electrical contacts -- a major use of
Stabilant 22 is to get
all
> the electrical noise out of hi-fi systems -- but
also lubricates
connector
insertions. If
you don't use Stabilant 22, I bet you wish you did."
Hi
Why use someone's resold product when you can just
buy some silicone grease like DC4 and it works fine.
DC4 will last longer because it contain a binder.
As for degreasing, I would suspect that something like
brake clean would be better on electronics. Gunk engine
cleaner has corrosives and is hygroscopic. I don't think
I want that in my machine. It would surely cause
long term problems. IMHO
Dwight