11 Aug
1999
11 Aug
'99
2:14 a.m.
No, I only soaked them for about an hour. They quickly reached a point where
no more oxide will come off with a foam-type "q-tip". Still, there is so
much oxide left that won't come off... I'm sending the heads in for work
today.
Thanks for the tip!
Jay West
-----Original Message-----
From: John Lawson <jpl15(a)netcom.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Tuesday, August 10, 1999 11:58 PM
Subject: Re: 14" hard drive refurb....
JAY!!! I **hope** you read this before tomorrow! Please remove
the heads from the alcohol right now... it is unpredictable what
long-term immersion in 91% isopropanol will do to a head assembly..
but I doubt anything good.
It is possible to soften and dissolve the coil binders, and
possibly to delaminate the magnetic core... and at the least to
impregnate the coils with alcohol, which will then be released as a
vapor or liquid contaminant over time... maybe carrying goo from the
stack.....
I hope that nothing evil comes of this... but overnight soaking
in **anything** is >not< the way to clean up magnetic heads.
Hoping for the best..
John