25 Nov
2008
25 Nov
'08
12:28 p.m.
a machinist dude told me the cellophane used to encapsulate ciggies is .001" thick. I
don't smoke anymore, can't determine how close that is to the truth. The paper is
bound to be at least .0005" larger - somewhere between .0015" and .0002".
I'm just guessing though.
--- On Tue, 11/25/08, Jos Dreesen / Marian Capel <jos.mar at bluewin.ch> wrote:
From: Jos Dreesen / Marian Capel <jos.mar at
bluewin.ch>
Subject: Re: magnetic drums
To: "On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
Date: Tuesday, November 25, 2008, 1:55 PM
I distinctly remember an article in the german CT magazine,
a couple of years ago.
It described the development of the G1, G2 and G3 computers
of the Gottingen university at the end of the 50 and
throughout the sixties.
They also used a drum, and the article described how they
coated the drum with the mixture of oxide and -something-
with a normal painter brush, by hand...
That -something- is mentioned in the article, I forgot what
it was.
Several attempts were required to get the correct
thickness.
Distance between heads and drum was measured using
cigarette paper as a shim....
Jos