15 Apr
2020
15 Apr
'20
7:22 p.m.
I have three others with the cover still on :) I want to make a clear
plexiglass cover for them.
Also have the driver boards.
On 2020-04-15 13:00, cctech-request at classiccmp.org wrote:
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Today's Topics:
1. Re: Core Memory Photo (keith at saracom.com)
2. Re: Core Memory Photo (Fred Cisin)
3. Re: Core Memory Photo (Joshua Rice)
----------------------------------------------------------------------
Message: 1
Date: Mon, 13 Apr 2020 13:05:03 -0400
From: keith at saracom.com
To: cctech at classiccmp.org
Subject: Re: Core Memory Photo
Message-ID: <c39ba3b5e51779bd29b39938655c5a9c at saracom.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
"Ouch. Looks like that core took a serious hit."
Yep it did. We ran the microscope into it at the lab. Ouch. Someone had
asked for a picture of core memory without the cover so I thought it
would do.
------------------------------
Message: 2
Date: Tue, 14 Apr 2020 09:53:39 -0700 (PDT)
From: Fred Cisin <cisin at xenosoft.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Subject: Re: Core Memory Photo
Message-ID: <Pine.LNX.4.64.2004140952460.8842 at shell.lmi.net>
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
On Mon, 13 Apr 2020, keith--- via cctalk wrote:
End of cctech Digest, Vol 67, Issue 15
**************************************
"Ouch. Looks like that core took a serious
hit."
Yep it did. We ran the microscope into it at the lab. Ouch. Someone had
asked for a picture of core memory without the cover so I thought it
would do.
It is beautiful!
------------------------------
Message: 3
Date: Wed, 15 Apr 2020 10:09:38 +0100
From: Joshua Rice <Rice43 at btinternet.com>
To: Fred Cisin <cisin at xenosoft.com>, "General Discussion: On-Topic and
Off-Topic Posts" <cctalk at classiccmp.org>
Subject: Re: Core Memory Photo
Message-ID: <353A7AE4-A147-4A06-9AFD-4A3398FABD1C at btinternet.com>
Content-Type: text/plain; charset=utf-8
Was beautiful.
That?s pretty mangled now.
On Apr 14, 2020, at 5:53 PM, Fred Cisin via cctalk <cctalk at classiccmp.org>
wrote:
On Mon, 13 Apr 2020, keith--- via cctalk wrote: "Ouch. Looks like that core took a
serious hit." Yep it did. We ran the microscope into it at the lab. Ouch. Someone
had
asked for a picture of core memory without the cover so I thought it
would do.
It is beautiful! 
16 Apr
16 Apr
6:02 p.m.
On 4/15/20 6:22 PM, keith--- via cctalk wrote:
I have three others with the cover still on :)? I want
to make a clear
plexiglass cover for them.
Just for fun, this is what I have from a Lockheed MAC-16 machine:
http://www.classiccmp.org/acornia/tmp/catcore.jpg
... the white line is a cat hair, just to give an idea of scale. It's
incredibly fine stuff (and if I remember right this board was from 1970; I
didn't think core got that compact until more toward the end of the decade,
right at the tail end of core's era, when semiconductor RAM had become
commonplace).
*somewhere* I have a microscope, so might try photographing through that at
some point; this was the best I could do with a loupe held over my camera's
lens.
I've wondered about doing the plexiglass thing too, just for display
purposes (the planes are damaged on both boards that I have, and I'm not
sure if anyone has an intact MAC-16 anywhere anyway), but then I got to
wondering what the point was given that it needs magnification to really
see anything anyway :-)
cheers
Jules
8:53 p.m.
On Thu, Apr 16, 2020 at 6:02 PM Jules Richardson via cctalk <
cctalk at classiccmp.org> wrote:
On 4/15/20 6:22 PM, keith--- via cctalk wrote:
I'm now tempted to try with the macro adapter for my good camera and see
how if I can improve on this one
https://goo.gl/photos/bV2JGbnDUH4uU7CDA
and this fun bit of core ROM
https://photos.app.goo.gl/WljReTaxbIIyXNgu1
I have three others with the cover still on :) I
want to make a clear
plexiglass cover for them.
Just for fun, this is what I have from a Lockheed MAC-16 machine:
http://www.classiccmp.org/acornia/tmp/catcore.jpg
... the white line is a cat hair, just to give an idea of scale. It's
incredibly fine stuff (and if I remember right this board was from 1970; I
didn't think core got that compact until more toward the end of the
decade,
right at the tail end of core's era, when semiconductor RAM had become
commonplace).
*somewhere* I have a microscope, so might try photographing through that
at
some point; this was the best I could do with a loupe held over my
camera's
lens.
I've wondered about doing the plexiglass thing
too, just for display
purposes (the planes are damaged on both boards that I have, and I'm not
sure if anyone has an intact MAC-16 anywhere anyway), but then I got to
wondering what the point was given that it needs magnification to really
see anything anyway :-)
Plexiglass works well for small planes. I have one which was about 5"x5".
I had a local plastic stop cut me 2 7"x7"x1/5" squares, plus 1 7x7x1/8
with a 5x5 square cut in the center. Then I made a sandwich of the 3,
with the plane in the cutout. I drilled a hole in each corner to put a bolt
through it. Short bolts on the top, but extra long ones on the bottom, so
I could use it as a stand.
I would send a picture, but it is in my office, which I have been locked
out of for a month.
cheers
Jules
1557
days inactive
1559
days old
2 comments
3 participants
participants (3)
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jules.richardson99＠gmail.com -
keith＠saracom.com -
tony.aiuto＠gmail.com