20 Mar
2015
20 Mar
'15
11:46 p.m.
Hi all,
Over the last months I scanned micro fiches with XXDP diagnostic program
listings.
These listings are essential for repairing PDP-11's (or enhancing SimH).
I digitized 330 listings from 452 fiches, with a total of 53545 document
pages.
Almost all of them should be new stuff.
The PDFs are ready for download now.
Until they appear at bitsavers.org, you can use my link:
ftp://u58104846-pub:open4you at ftp.j-hoppe.de
(Note the embedded user/password strings)
The scans come in two versions: "high quality" and "black&white":
The HQ version is gray level and contains a true image of the micro
fiches, after non-destructive contrast enhancement. It is the base for
further image processing.
Download path is ./fichescanner/hq/gh
The BW version is compressed to black & white and aggressively optimized
for size and letter quality. File sizes are 20x smaller than the HQ
version. Its intended for daily use and OCR, but for some very
problematic fiches textual information is lost.
Download path is ./fichescanner/bw/gh
And there is a background article on
http://retrocmp.com/projects/scanning-micro-fiches
describing the self-build automatic micro fiche scanner (video!)
Enjoy!
Joerg
21 Mar
21 Mar
3 a.m.
Am 21.03.2015 um 07:46 schrieb J?rg Hoppe:
Hi all,
Over the last months I scanned micro fiches with XXDP diagnostic
program listings.
These listings are essential for repairing PDP-11's (or enhancing SimH).
I digitized 330 listings from 452 fiches, with a total of 53545
document pages.
Almost all of them should be new stuff.
The PDFs are ready for download now.
Until they appear at bitsavers.org, you can use my link:
ftp://u58104846-pub:open4you at ftp.j-hoppe.de
(Note the embedded user/password strings)
The scans come in two versions: "high quality" and
"black&white":
The HQ version is gray level and contains a true image of the micro
fiches, after non-destructive contrast enhancement. It is the base for
further image processing.
Download path is ./fichescanner/hq/gh
The BW version is compressed to black & white and aggressively
optimized for size and letter quality. File sizes are 20x smaller than
the HQ version. Its intended for daily use and OCR, but for some very
problematic fiches textual information is lost.
Download path is ./fichescanner/bw/gh
And there is a background article on
http://retrocmp.com/projects/scanning-micro-fiches
describing the self-build automatic micro fiche scanner (video!)
Enjoy!
Joerg
Danke daf?r..
3:03 a.m.
Fantastic! You have done a great work!
I found the listing for the DGKAB 11/04 trap test that I have been looking
for.
/Mattis
2015-03-21 7:46 GMT+01:00 J?rg Hoppe <j_hoppe at t-online.de>:
Hi all,
Over the last months I scanned micro fiches with XXDP diagnostic program
listings.
These listings are essential for repairing PDP-11's (or enhancing SimH).
I digitized 330 listings from 452 fiches, with a total of 53545 document
pages.
Almost all of them should be new stuff.
The PDFs are ready for download now.
Until they appear at bitsavers.org, you can use my link:
ftp://u58104846-pub:open4you at ftp.j-hoppe.de
(Note the embedded user/password strings)
The scans come in two versions: "high quality" and
"black&white":
The HQ version is gray level and contains a true image of the micro
fiches, after non-destructive contrast enhancement. It is the base for
further image processing.
Download path is ./fichescanner/hq/gh
The BW version is compressed to black & white and aggressively optimized
for size and letter quality. File sizes are 20x smaller than the HQ
version. Its intended for daily use and OCR, but for some very problematic
fiches textual information is lost.
Download path is ./fichescanner/bw/gh
And there is a background article on
http://retrocmp.com/projects/scanning-micro-fiches
describing the self-build automatic micro fiche scanner (video!)
Enjoy!
Joerg
3:18 a.m.
Yeah ... this one was meant for you ;-)
joerg
Am 21.03.2015 um 11:03 schrieb Mattis Lind:
Fantastic! You have done a great work!
I found the listing for the DGKAB 11/04 trap test that I have been looking
for.
/Mattis
2015-03-21 7:46 GMT+01:00 J?rg Hoppe <j_hoppe at t-online.de>:
Hi all,
Over the last months I scanned micro fiches with XXDP diagnostic program
listings.
These listings are essential for repairing PDP-11's (or enhancing SimH).
I digitized 330 listings from 452 fiches, with a total of 53545 document
pages.
Almost all of them should be new stuff.
The PDFs are ready for download now.
Until they appear at bitsavers.org, you can use my link:
ftp://u58104846-pub:open4you at ftp.j-hoppe.de
(Note the embedded user/password strings)
The scans come in two versions: "high quality" and
"black&white":
The HQ version is gray level and contains a true image of the micro
fiches, after non-destructive contrast enhancement. It is the base for
further image processing.
Download path is ./fichescanner/hq/gh
The BW version is compressed to black & white and aggressively optimized
for size and letter quality. File sizes are 20x smaller than the HQ
version. Its intended for daily use and OCR, but for some very problematic
fiches textual information is lost.
Download path is ./fichescanner/bw/gh
And there is a background article on
http://retrocmp.com/projects/scanning-micro-fiches
describing the self-build automatic micro fiche scanner (video!)
Enjoy!
Joerg
6:55 a.m.
New subject: Wheels turning slowly ... but arriving at the right location
All,
Berkeley has gotten around to honoring one of its most deserving alumnae:
http://alumni.berkeley.edu/announcements/caa-announcements/caa-announces-20…
Congratulations are definitely due and then some.
- Mark
23 Mar
23 Mar
12:08 p.m.
New subject: Wheels turning slowly ... but arriving at the right location
From: Tapley, Mark
Sent: Saturday, March 21, 2015 6:55 AM
Berkeley has gotten around to honoring one of its most
deserving alumnae:
The biographical sketch is too short to judge. What else can you tell us
about Ms. Matsuoka?
Rich
Rich Alderson
Vintage Computing Sr. Systems Engineer
Living Computer Museum
2245 1st Avenue S
Seattle, WA 98134
mailto:RichA at LivingComputerMuseum.org
http://www.LivingComputerMuseum.org/
21 Mar
21 Mar
3:29 a.m.
Joerg,
On Sat, 21 Mar 2015 07:46:09 +0100
J?rg Hoppe <j_hoppe at t-online.de> wrote:
Hi all,
Over the last months I scanned micro fiches with XXDP diagnostic
program listings.
These listings are essential for repairing PDP-11's (or enhancing
SimH). I digitized 330 listings from 452 fiches, with a total of
53545 document pages.
Almost all of them should be new stuff.
--snip--
Great job. A serious "labor of love". Thanks a LOT!
Cheers,
Lyle
--
Bickley Consulting West Inc.
http://bickleywest.com
"Black holes are where God is dividing by zero"
26 Mar
26 Mar
7:27 p.m.
New subject: What kind of adhesive for floppy drive?
I'm in the process of fixing a floppy drive mechanism. I had to replace the heads on
the drive with a NOS part and I need to re-glue the head carriage assembly to the band
that attaches to the head stepper motor. The original adhesive is a clear blue glue of
some sort, I suppose similar to loctite. Anyone know what this stuff is? It seems like
it's come up before, but I'm not sure.
Thanks,
Geoff
10:42 p.m.
New subject: What kind of adhesive for floppy drive?
I'm in the process of fixing a floppy drive mechanism. I had to replace the heads on
the drive with a NOS part and
I need to re-glue the head carriage assembly to the band that attaches to the head
stepper motor. The original
adhesive is a clear blue glue of some sort, I suppose similar to loctite. Anyone know
what this stuff is? It seems like
it's come up before, but I'm not sure.
What is the make and model of the drive?
Are you sure it needs to be glued? On every drive I've worked on the band is kept
under tension by a
spring in the head carrage (maybe a leaf spring on the end), the ends of the band are
fixed by hooks or
screws. There may have been some glue originally to keep it in place during american
football/shipping,
but it isn't necessary IMHO. I've rebuilt a fair number of positioners and never
put any glue on them.
-tony
11:15 p.m.
New subject: What kind of adhesive for floppy drive?
Loc-tite isn't a glue, it's an anaerobic sealant. It will +only+ cure if
deprived of air (in fact, oxygen, I believe). It cannot be used in place of
a typical adhesive, as it lacks many of the qualities of adhesives.
Interesting fact - Loc-tite was developed several years before it could be
marketed, as any time it was sealed up in an air-tight container, it would
harden. It was only the development of gas-permeable polyethylene bottles
that made it practical to sell commercially. The containers allow just
enough gas ingress that the materials will not cure off in the bottle.
On Fri, Mar 27, 2015 at 12:42 AM, tony duell <ard at p850ug1.demon.co.uk>
wrote:
I'm in the process of fixing a floppy drive mechanism. I had to replace
the
heads on the drive with a NOS part and
I need to re-glue the head carriage assembly to
the band that attaches
to the head stepper motor. The original
adhesive is a clear blue glue of some sort, I
suppose similar to
loctite. Anyone know what this stuff is? It seems like
it's come up before, but I'm not sure.
What is the make and model of the drive?
Are you sure it needs to be glued? On every drive I've worked on the band
is kept under tension by a
spring in the head carrage (maybe a leaf spring on the end), the ends of
the band are fixed by hooks or
screws. There may have been some glue originally to keep it in place
during american football/shipping,
but it isn't necessary IMHO. I've rebuilt a fair number of positioners and
never put any glue on them.
-tony
30 Mar
30 Mar
11:35 a.m.
New subject: What kind of adhesive for floppy drive?
On Fri, Mar 27, 2015 at 12:42 AM, tony duell <ard at p850ug1.demon.co.uk>
wrote:
What is the make and model of the drive?
It is a Newtronics mechanism from a Commodore 128D.
Are you sure it needs to be glued? On every drive
I've worked on the band
is kept under tension by a
spring in the head carrage (maybe a leaf spring on the end), the ends of
the band are fixed by hooks or
screws. There may have been some glue originally to keep it in place
during american football/shipping,
but it isn't necessary IMHO. I've rebuilt a fair number of positioners and
never put any glue on them.
Yes, that appears to be the case here as well. This one doesn't have screws
but rather two plastic posts that fit into the perforated holes in the
band. Upon further inspection it appears that there is no play fore/aft
which is what I was more concerned about vs the band coming off completely.
Thanks for all the responses. It does appear to be some sort of fairly
brittle epoxy. I think I may either put a dab of my wife's nail polish on
them, or just leave them be. :)
Geoff
27 Mar
27 Mar
3:22 a.m.
New subject: What kind of adhesive for floppy drive?
On 27/03/2015 02:27, Geoff Oltmans wrote:
I'm in the process of fixing a floppy drive
mechanism. I had to
replace the heads on the drive with a NOS part and I need to re-glue
the head carriage assembly to the band that attaches to the head
stepper motor. The original adhesive is a clear blue glue of some
sort, I suppose similar to loctite.
It's very unlikely to be cyanoacrylate. "Clear blue" is typical of
low-viscosity epoxy, such as used for optical fibre terminations or to
coat or seal some types of composites. It's often fairly hard or brittle.
I'm surprised it's glued. Not just screwed?
--
Pete
Pete Turnbull
5:45 p.m.
New subject: What kind of adhesive for floppy drive?
Could it be one of those thick-bodied sealing lacquers, such as used to fix
trimmer controls in place, and so on? I've seen them in deep green, red and
a sort of amber color, but not blue.
I'm sure many of us are familiar with the material - it holds fasteners &
control shafts in place very well, but 'shatters' and falls away fairly
cleanly, once you give the treated part a good twist.
Glyptal is also used in those applications, but that material is typically
opaque and a burnt-orange color. It's also a lot tougher.
On Fri, Mar 27, 2015 at 5:22 AM, Pete Turnbull <pete at dunnington.plus.com>
wrote:
On 27/03/2015 02:27, Geoff Oltmans wrote:
I'm in the process of fixing a floppy drive
mechanism. I had to
replace the heads on the drive with a NOS part and I need to re-glue
the head carriage assembly to the band that attaches to the head
stepper motor. The original adhesive is a clear blue glue of some
sort, I suppose similar to loctite.
It's very unlikely to be cyanoacrylate. "Clear blue" is typical of
low-viscosity epoxy, such as used for optical fibre terminations or to coat
or seal some types of composites. It's often fairly hard or brittle.
I'm surprised it's glued. Not just screwed?
--
Pete
Pete Turnbull
7:11 p.m.
New subject: What kind of adhesive for floppy drive?
On 03/27/2015 05:45 PM, drlegendre . wrote:
Could it be one of those thick-bodied sealing
lacquers, such as used to fix
trimmer controls in place, and so on? I've seen them in deep green, red and
a sort of amber color, but not blue.
I'm sure many of us are familiar with the material - it holds fasteners &
control shafts in place very well, but 'shatters' and falls away fairly
cleanly, once you give the treated part a good twist.
Glyptal is also used in those applications, but that material is typically
opaque and a burnt-orange color. It's also a lot tougher.
Lacquer based thread lockers/fillers used to be very common. Old-timers
would use nail polish (cellulose nitrate-based). I've used plain old
red Duco lacquer, but that's pretty much unobtainium nowadays.
Loctite 8060 Pro-Lock Tight seems to be a modern-age equivalent.
--Chuck
28 Mar
28 Mar
8:39 a.m.
New subject: What kind of adhesive for floppy drive?
On Mar 27, 2015, at 19:11, Chuck Guzis <cclist at
sydex.com> wrote:
Loctite 8060 Pro-Lock Tight seems to be a modern-age equivalent.
I looked up 8060 on the Loctite site, and it appears to be a hot-melt glue?
--
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/
10:18 a.m.
New subject: What kind of adhesive for floppy drive?
On 03/28/2015 08:39 AM, Mark J. Blair wrote:
Feh, probably got the wrong part number--the Loctite site is very
confusing. Here's the stuff:
http://www.henkelna.com/product-search-1554.htm?nodeid=8797876748289
--Chuck
On Mar 27, 2015, at 19:11, Chuck Guzis <cclist
at sydex.com> wrote:
Loctite 8060 Pro-Lock Tight seems to be a modern-age equivalent.
I looked up 8060 on the Loctite site, and it appears to be a hot-melt glue?
3560
days inactive
3569
days old
15 comments
12 participants
participants (12)
-
ard＠p850ug1.demon.co.uk -
cclist＠sydex.com -
drlegendre＠gmail.com -
fritz_chwolka＠t-online.de -
j_hoppe＠t-online.de -
lbickley＠bickleywest.com -
mattislind＠gmail.com -
mtapley＠swri.edu -
nf6x＠nf6x.net -
oltmansg＠gmail.com -
pete＠dunnington.plus.com -
RichA＠LivingComputerMuseum.org