I have learned that Bakelite insulating is phenol and formaldehyde with
embedded asbestos. Does anyone have any Bakelite insulation in any of
their vintage computers?
I wonder whether it was the word "insulation" that triggered this
ridiculous inquiry.
To many people, "insulation" means the
On 1/29/21 11:30 AM, Pete Turnbull via cctalk wrote:
On 29/01/2021 15:51, Bill Degnan via cctalk wrote:
I have learned that Bakelite insulating is phenol and formaldehyde with
embedded asbestos. Does anyone have any Bakelite insulation in any of
their vintage computers?
*Some* Bakelite contai
On 1/29/21 8:30 AM, Pete Turnbull via cctalk wrote:
> On 29/01/2021 15:51, Bill Degnan via cctalk wrote:
>> I have learned that Bakelite insulating is phenol and formaldehyde with
>> embedded asbestos. Does anyone have any Bakelite insulation in any of
>> their vintage computers?
>
> *Some* Bakel
On 29/01/2021 15:51, Bill Degnan via cctalk wrote:
I have learned that Bakelite insulating is phenol and formaldehyde with
embedded asbestos. Does anyone have any Bakelite insulation in any of
their vintage computers?
*Some* Bakelite contains asbestos. The primary filler is commonly wood
flo
ts:
> I'm looking for any information about Bakelite insulating
> materials and phenolic resins used in Univac DCT products manufactured in the
> Salt Lake City facility from 1970 to 1978. VintageComputer.net
> ---
>
>
> Bill
>
On Fri, 29 Jan 2021 at 15:20, Bill Gunshannon via cctalk
wrote:
> Ah yes, radium. You'll get my original R-390/URR meters when you pry
> them from my cold, dead, glowing hands.
Relevant (& from a list member):
"My vintage vacuum tubes are radio-active!"
https://www.youtube.com/watch?v=VYSWIdDcbG
On 1/29/21 9:56 AM, Chris Zach via cctalk wrote:
> Anti-vax stuff
Do me a favor: Mail it to me. This vaccine FUD is crap, is not based in
science or reality, and has to stop.
Sorry to post this on a classic forum, but this bullshit needs to end now.
Bill, I sent out the box of 8 inch floppi
> Anti-vax stuff
Do me a favor: Mail it to me. This vaccine FUD is crap, is not based in
science or reality, and has to stop.
Sorry to post this on a classic forum, but this bullshit needs to end now.
Bill, I sent out the box of 8 inch floppies yesterday.
CZ
On 1/28/21 5:00 PM, Fred Cisin via cctalk wrote:
On Thu, 28 Jan 2021, corey cohen via cctalk wrote:
I’m actually surprised that it took this long before the “sharks”
started to circle our historical objects looking for things like
asbestos, arsenic, radium and other “poisons” used in the making
On 1/28/21 3:08 PM, Chuck Guzis via cctalk wrote:
Most of these actions aren't lawsuits per se, but rather claims made on
trust funds set up by asbestos manufacturers as part of Chapter 7
bankruptcy filings. So the money's already there and if one has been
afflicted by mesothelioma and can clai
On 1/28/21 10:52 AM, Jon Elson via cctalk wrote:
On 01/28/2021 02:29 AM, Curious Marc via cctalk wrote:
We have had this guy harassing the Computer History Museum, then all
unsuspecting restorers under the false pretense of doing computer
materials history research. In the end we understood he
On 1/28/21 9:19 AM, corey cohen via cctalk wrote:
I’m actually surprised that it took this long before the “sharks” started to
circle our historical objects looking for things like asbestos, arsenic, radium
and other “poisons” used in the making these machines.
Ah yes, radium. You'll get my
Name: CECIL CRAIN
Email: ccrain@rgoldlegal-got-com Phone: 4157869527
- Comments:
I'm looking for any information about Bakelite insulating
materials and phenolic resins used in Univac DCT products manufactured
in the Salt Lake City facility from
On Thu, 28 Jan 2021, corey cohen via cctalk wrote:
I’m actually surprised that it took this long before the “sharks”
started to circle our historical objects looking for things like
asbestos, arsenic, radium and other “poisons” used in the making
these machines.
I'm sure that they have alread
Most of these actions aren't lawsuits per se, but rather claims made on
trust funds set up by asbestos manufacturers as part of Chapter 7
bankruptcy filings. So the money's already there and if one has been
afflicted by mesothelioma and can claim *any* exposure to asbestos in
the past, the fund u
On Thu, 2021-01-28 at 09:52 -0600, Jon Elson via cctalk wrote:
> On 01/28/2021 02:29 AM, Curious Marc via cctalk wrote:
> > We have had this guy harassing the Computer History Museum, then all
> > unsuspecting restorers under the false pretense of doing computer materials
> > history research. In
On 01/28/2021 02:29 AM, Curious Marc via cctalk wrote:
We have had this guy harassing the Computer History Museum, then all
unsuspecting restorers under the false pretense of doing computer materials
history research. In the end we understood he was trying to find out if
asbestos was used in t
I’m actually surprised that it took this long before the “sharks” started to
circle our historical objects looking for things like asbestos, arsenic, radium
and other “poisons” used in the making these machines.
Cheers,
Corey
CRAIN
>Email: ccrain@rgoldlegal-got-com Phone: 4157869527
> - Comments:
>I'm looking for any information about Bakelite insulating
> materials and phenolic resins used in Univac DCT products manufactured
> in the Salt Lake City facil
: 4157869527
- Comments:
I'm looking for any information about Bakelite insulating
materials and phenolic resins used in Univac DCT products manufactured
in the Salt Lake City facility from 1970 to 1978.
VintageCompute
On 4/22/20 12:52 PM, ED SHARPE via cctalk wrote:
> We have a UNIVAC 422 compute at smecc..looking for the Remington
> typewriter unit with a removable punch and reader on it.
> The typer is like a flexowriter but newer and sleeker...although we have
> seen a 422 with the
On Wed, Apr 22, 2020 at 11:57 AM Nigel Johnson via cctalk <
cctalk@classiccmp.org> wrote:
> Thanks for the link. I am sure I am going to come down and see your
> site when this crisis is over!
>
> I was an FE on three Univac 418 IIs at Bell Canada in Toronto between
> 197
We have a UNIVAC 422 compute at smecc..looking for the Remington typewriter
unit with a removable punch and reader on it.
The typer is like a flexowriter but newer and sleeker...although we have
seen a 422 with the flexowriter like the UDT had on it.
Have some programming that is
: Univac 490 Gallery Talk - 1963 Real Time Computer
Thanks for the link. I am sure I am going to come down and see your site when
this crisis is over!
I was an FE on three Univac 418 IIs at Bell Canada in Toronto between
1971 and 1975.
Don't suppose you have any 418s there?
cheers,
Nigel
Thanks for the link. I am sure I am going to come down and see your
site when this crisis is over!
I was an FE on three Univac 418 IIs at Bell Canada in Toronto between
1971 and 1975.
Don't suppose you have any 418s there?
cheers,
Nigel
On 22/04/2020 08:52, Bill Degnan via cctalk
A true treasure and worth the trip to System Source to see in person.
First class stuff there! (When it reopens, ug)
On Tue, Apr 21, 2020, 7:16 PM rar via cctalk wrote:
> The System Source Computer Museum is closed due to COVID-19, so we are
> making some video gallery talks.
>
> Here is the fi
The System Source Computer Museum is closed due to COVID-19, so we are making
some video gallery talks.
Here is the first one:
https://www.youtube.com/watch?v=hq7aVCc2GP8
The video describes some of the applications of this 57 year old computer
including it original use at Goddard Space Flig
ok that is the larger ones... we are trying to fill a whole in a
display
we are seeking the 20 meg iss graves 10 platter. the 40 meg that looks
the same is ok too for a visual...
If anyone was one let us know... it completes a museum display
even better
Hi Ed,
this exerciser supports the ISS 7330-type of drives, which come with capacities
of 100MBytes and 200MBytes on 10-platter-placks (they are IBM-3336 equivalents).
Best regards,
Pierre
-
http://www.digitalheritage.d
I mean
which iss drive the 10 platter pack. the 20 meg one? Ed#
In a message dated 3/29/2020 10:22:30 PM US Mountain Standard Time,
cctalk@classiccmp.org writes:
which iss drive the 10 plotter 20 meg one? Ed#
In a message dated 3/27/2020 5:12:08 AM US Mountain Stan
which iss drive the 10 plotter 20 meg one? Ed#
In a message dated 3/27/2020 5:12:08 AM US Mountain Standard Time,
cctalk@classiccmp.org writes:
On 3/27/20 3:55 AM, P Gebhardt via cctalk wrote:
> I contacted two times Al via email for access credentials to upload the
> document as I did in
On 3/27/20 3:55 AM, P Gebhardt via cctalk wrote:
I contacted two times Al via email for access credentials to upload the
document as I did in the past years for numerous scans, but I never got an
answer.
private msg sent
sorry, things have been crazy
Hello list,
I have a scan of a manual with schematics for a ISS Sperry Univac Driver
Exerciser for 7330 and 843x type of disk drives that was kindly scanned and
provided to me by Mark from the Computer History Archivies Project, since he
and myself happen to come accross such exercisers. I
Someone really wanted a keyboard for a Univac Terminal in the last year,
year and a half. Added to subject line to maybe attract attention of
who was searching.
Someone in Europe though, IIRC?
thanks
Jim
On 10/29/2019 7:15 PM, Jeffrey S. Worley via cctalk wrote:
This link was posted on an
On 2019-09-20 12:52 p.m., Chuck Guzis via cctalk wrote:
On 9/20/19 8:16 AM, William Sudbrink via cctalk wrote:
Isn't there also one that's a "help wanted" for programming positions?
I seem to recall that they didn't say anything about professional training
or experience, just things like "do y
Yea, I recall having to take that test. I almost didn’t because my degree is
EE but then
they realized I was applying for SW positions. Go figure! ;-)
Worked there for 17+ years.
TTFN - Guy
> On Sep 20, 2019, at 8:52 AM, Chuck Guzis via cctalk
> wrote:
>
> On 9/20/19 8:16 AM, William Sudb
On 9/20/19 8:16 AM, William Sudbrink via cctalk wrote:
> Isn't there also one that's a "help wanted" for programming positions?
> I seem to recall that they didn't say anything about professional training
> or experience, just things like "do you have a logical, ordered way of
> thinking?"
I don't
--
From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Chuck Guzis
via cctalk
Sent: Thursday, September 19, 2019 10:10 PM
To: Marvin Johnston via cctalk
Subject: Re: Early Univac Commercial
There are several Univac commercials in the archive.org video library.
I like the one that
There are several Univac commercials in the archive.org video library.
I like the one that talks about he Univac "memory tank", which, it
really was.
The curious thing was that Remington Rand ran commercials not only for
UNIVAC computers, but also for shavers and typewriters.
--Chuck
I was watching an early airing of "What's My Line", and they aired a
commercial by Remington Rand:
https://www.youtube.com/watch?v=I-DNG_bbHDE
The commercial starts about 19:30 and shows the Univac being used in a
weather prediction. Not much useful information, but the
Ed said
> Great
> info!https://www.zdnet.com/article/to-the-moon-ibm-and-univac-appollo-11s-integrators/?ftag=TREc64629f&bhid=46856739
>
Here's an all-employees memo my dad kept about IBM's part in the success of the
mission:
http
800 bpi, bloody luxury.
I was an FE on a Univac 418 installation, the Uniservo VI C drives that
we used had three choices, 200, 556, and 800. We had to extract
billing data daily to send to head office, I think they had an IBM 360
that read them, and we had to check alignment every month
On 7/21/19 11:41 AM, ED SHARPE via cctalk wrote:
> Great
> info!https://www.zdnet.com/article/to-the-moon-ibm-and-univac-appollo-11s-integrators/?ftag=TREc64629f&bhid=46856739
Since I'm just winding up (I hope!) archiving a batch of tapes from JPL
from the 60s and 70s, I might to
On Sun, Jul 21, 2019 at 11:42 AM ED SHARPE via cctalk
wrote:
> Great info!
> https://www.zdnet.com/article/to-the-moon-ibm-and-univac-appollo-11s-integrators/?ftag=TREc64629f&bhid=46856739
>
The Boeing Museum of Flight is doing Moon landing events this weekend. The
Living Compu
Great
info!https://www.zdnet.com/article/to-the-moon-ibm-and-univac-appollo-11s-integrators/?ftag=TREc64629f&bhid=46856739
UNIVAC 422 Training Computer material acquisitions updates..
- UNIVAC 422 Training Computer program Instruction reference cards - (4
each)- Photograph of students using one in an educational environment (1
each)- Applications programs description sheets fro 2 programs ( 1 each
UNIVAC 422 Training Computer material acquisitions updates..
- UNIVAC 422 Training Computer program Instruction reference cards - (4
each)- Photograph of students using one in an educational environment (1
each)- Applications programs description sheets fro 2 programs ( 1 each
: dkel...@hotmail.com; cctalk@classiccmp.org
Subject: Re: UNIVAC 422 User Grouop Forming Please drop us a note offlist With
SN of your unit and stats of operability and completeness and go withs.
there are 2 manuals one is the art versionthe other one is a
programmers one but the
#
In a message dated 11/3/2018 9:17:22 PM US Mountain Standard Time,
dkel...@hotmail.com writes:
These sound really cool but I suspect the number of people with a Univac 422
are quite limited. Even those with Univac panel of any kind are quite limited.
I see the web page has a OCR of the
These sound really cool but I suspect the number of people with a Univac 422
are quite limited. Even those with Univac panel of any kind are quite limited.
I see the web page has a OCR of the text. A photo copy of the manual would be
great as well.
Dwight
From
NOW FORMING - -UNIVAC 422 User Group and including The 422 and the prior
UNIVAC DIGITAL TRAINER - (Is there a code compatibility?)
Please drop us a note off list With SN of your unit and stats of if able to
operate and completeness and go withs. Include a pic of you and your unit
Bill Donzelli may have things in the part of the Univac load he has
either in OKC or at his place.
I gathered all the documentation on the remains of a stolen Univac III
system I could, along with all the tapes.
Muffed an opportunity to get the tapes to Al K for digitizing, will
organize
You may also need to make a field trip to CBI to check the Univac corporate
archives
On 10/13/18 3:55 PM, Al Kossow via cctalk wrote:
> hopefully, Jim Stevens was able to save some of the docs from the Univac III
>
> On 10/13/18 1:36 PM, Tom Gardner via cctalk wrote:
>> Hi:
&g
hopefully, Jim Stevens was able to save some of the docs from the Univac III
On 10/13/18 1:36 PM, Tom Gardner via cctalk wrote:
> Hi:
>
> I'm looking for maintenance manuals for old Univac tape and printers. I've
> already mined Bitsavers and done some fairly extensi
Tom will check I was looking thru some univac stuff. and saw ..trying to find
manuals for that odd freiden flexowritrer sorta thing that was used on univac
422 that has a punch and reader that...separates. YES SEPERATES! from the side
of the typer... so weird I must have one of these
Hi:
I'm looking for maintenance manuals for old Univac tape and printers. I've
already mined Bitsavers and done some fairly extensive Google searches but
would like manuals on:
Tapes: Uniservo IIA, IIIA or IIIC, VIC, VIIIC, 12, 16 or 20
Printers: 0751, 0755 (used on 1108), 0758 (us
ct: Sperry Univac UTS-40 Terminal doc anyone?
I am the temporary caretaker of a Sperry UTS-40 "intelligent" terminal (very
green screen, Z-80 based terminal from the late 70's or early 80's) which I
grabbed on eBait for sending parts to Dominique Carlier over in Belgium. The
C
I am the temporary caretaker of a Sperry UTS-40 "intelligent" terminal (very
green screen, Z-80 based terminal from the late 70's or early 80's) which I
grabbed on eBait for sending parts to Dominique Carlier over in Belgium. The
CRT, power supply and character generator seem to work (gives a very
uld post a heads for
>
> https://photos.app.goo.gl/36CxlZQJDssj5uLh1
>
> I have the IBM 360 aluminum plate that goes on top, it is scratched. More
> detailed and better pictures as I dig deeper.
...and if someone needs a nice Univac 9400 console to go with that, I have one
d
On 22.02.2018 18:56, Pete Lancashire via cctalk wrote:
I thought I would post a heads for
https://photos.app.goo.gl/36CxlZQJDssj5uLh1
I have the IBM 360 aluminum plate that goes on top, it is scratched. More
detailed and better pictures as I dig deeper.
...and if someone needs a nice Univac
ussion: On-Topic and Off-Topic Posts
Subject: Re: The SPERRY UNIVAC UTS 40 system + 8406 double-sided diskette
subsystem : Restoration
Since you know the pinout of the SIO chip, you might first look to see if where
the rx and tx pins go. This may require some hunting with an ohm meter. I'd
Topic Posts
Subject: Re: The SPERRY UNIVAC UTS 40 system + 8406 double-sided diskette
subsystem : Restoration
Since you know the pinout of the SIO chip, you might first look to see if where
the rx and tx pins go. This may require some hunting with an ohm meter. I'd
suspect they go to a R
From here you will likely have to begin to troubleshoot.
Dwight
From: cctalk on behalf of Dominique Carlier via
cctalk
Sent: Tuesday, October 17, 2017 1:59:47 PM
To: Chuck Guzis; General Discussion: On-Topic and Off-Topic Posts
Subject: Re: The SPERRY UNIVA
Thanks for your response Chuck,
As described in the topic, just after the Power On, the machine runs a
self-test which is called "POC TEST" on the UTS range of Sperry Univac.
During this test, the machine checks the status of the RAM, the ROMs,
the Counter Timer, and the various com
s.
Dwight
From: cctalk on behalf of Dominique Carlier via
cctalk
Sent: Tuesday, October 17, 2017 10:50:29 AM
To: Chuck Guzis via cctalk
Subject: Re: The SPERRY UNIVAC UTS 40 system + 8406 double-sided diskette
subsystem : Restoration
Hi Chuck,
Yes I understand well. But the fact that th
On 10/17/2017 10:50 AM, Dominique Carlier via cctalk wrote:
> Hi Chuck,
>
> Yes I understand well. But the fact that the machines Z80 based were all
> equipped with this famous serial I/O channel A and B, I therefore
> thought that the principle of verification of these channels would
> probably b
Hi Chuck,
Yes I understand well. But the fact that the machines Z80 based were all
equipped with this famous serial I/O channel A and B, I therefore
thought that the principle of verification of these channels would
probably be the same on this type of architecture (Z80+PIO+CTC+SIO).
Therefor
Hi Mattis !
I'm afraid I do not have the required skills :-/
I have never used this kind of tools. However I recovered this recently:
http://actingmachines.com/img/photos/package/europacorp/tektronix_1240_b.jpg
But in the present state of my knowledge, I could not use it. Is it
difficult fo
On 10/17/2017 04:56 AM, Dominique Carlier via cctalk wrote:
> Hi guys!
>
> Nobody here has any information to help me to solve my problem?
> Do you think I should talk about this breakdown on another forum? If
> yes, have you an address to recommend me?
>
Dominique, the probably reason that many
2017-10-17 13:56 GMT+02:00 Dominique Carlier via cctalk <
cctalk@classiccmp.org>:
> Hi guys!
>
> Nobody here has any information to help me to solve my problem?
> Do you think I should talk about this breakdown on another forum? If yes,
> have you an address to recommend me?
>
> Thanks
>
> Dominiq
Hi guys!
Nobody here has any information to help me to solve my problem?
Do you think I should talk about this breakdown on another forum? If
yes, have you an address to recommend me?
Thanks
Dominique
On 15/10/2017 23:12, Dominique Carlier via cctalk wrote:
Hi everybody,
As I have no docu
Hi everybody,
As I have no documentation / schematics I started to look for computer
schematics where it is about Z80 and “serial I/O channel B”, I found a
lot of data about this subject that I do not know at all.
These information would allow me to better target the breakdown, if any
of you w
On Tue, Oct 10, 2017 at 1:16 PM, Evan Koblentz via cctalk <
cctalk@classiccmp.org> wrote:
> I texted our project leader. He replied: "The short answer is I don't
> know. The copy I got is from one of the sailors on a destroyer with the
> equipment. Most programs written for the 1219 used an assemb
VCF Univac 'project leader' wrote:
"Remember that there is only 32K of memory in the machine."
"only 32k"?? HP2K ran 32 users in 32K of ram, and did it quite well.
J
On 10/10/2017 11:16 AM, Evan Koblentz via cctalk wrote:
> I texted our project leader. He replied: "The short answer is I don't
> know. The copy I got is from one of the sailors on a destroyer with the
> equipment. Most programs written for the 1219 used an assembler called
> TRIM or Ultra. Rememb
good to see it up and running!
Ed#
In a message dated 10/10/2017 5:08:17 A.M. US Mountain Standard Time,
cctalk@classiccmp.org writes:
nice job. How many 1219-B's are still running in the world any more?
Bill
On Tue, Oct 10, 2017 at 1:00 AM, Evan Koblentz via cctalk <
cctalk@classiccmp.
Wonderful! What a beast! Nice to see the Model 35 TTY working so well too.
Wumpus runs on my HP 85, but it's not quite the same experience ;-). Curiously
it's one of the kids favorite vintage games.
Marc
On Oct 9, 2017, at 10:00 PM, Evan Koblentz via cctalk
wrote:
Here it is loading/runni
Here it is loading/running memory tests and Wumpus. :)
https://www.youtube.com/playlist?list=PL_e5fSxflvrzeovlnioDfQR86zJOLPQ-D
Fun. Would love to see more Wumpus, but turn the camera 90 degrees.
Was it written in FORTRAN? Machine code? Feasible to port other
games of the vintage?
I text
nice job. How many 1219-B's are still running in the world any more?
None that I know of...
On 10 October 2017 at 07:00, Evan Koblentz via cctalk
wrote:
> Here it is loading/running memory tests and Wumpus. :)
>
> https://www.youtube.com/playlist?list=PL_e5fSxflvrzeovlnioDfQR86zJOLPQ-D
Wonderful -- but I do wish the camera operator had held their phone on its side!
--
Liam Proven • Pr
On Tue, 10 Oct 2017 01:00:34 -0400
Evan Koblentz via cctalk wrote:
> Here it is loading/running memory tests and Wumpus. :)
>
> https://www.youtube.com/playlist?list=PL_e5fSxflvrzeovlnioDfQR86zJOLPQ-D
Terrific!!! Passing this on the the PDP-1 and 1401 Restoration and
Demo Teams at the CHM.
Ch
On Tue, Oct 10, 2017 at 1:00 AM, Evan Koblentz via cctalk
wrote:
> Here it is loading/running memory tests and Wumpus. :)
>
> https://www.youtube.com/playlist?list=PL_e5fSxflvrzeovlnioDfQR86zJOLPQ-D
Fun. Would love to see more Wumpus, but turn the camera 90 degrees.
Was it written in FORTRAN?
nice job. How many 1219-B's are still running in the world any more?
Bill
On Tue, Oct 10, 2017 at 1:00 AM, Evan Koblentz via cctalk <
cctalk@classiccmp.org> wrote:
> Here it is loading/running memory tests and Wumpus. :)
>
> https://www.youtube.com/playlist?list=PL_e5fSxflvrzeovlnioDfQR86zJOLPQ-
Here it is loading/running memory tests and Wumpus. :)
https://www.youtube.com/playlist?list=PL_e5fSxflvrzeovlnioDfQR86zJOLPQ-D
> On Oct 4, 2017, at 9:58 AM, Evan Koblentz via cctalk
> wrote:
>
>>> Here's a phone video from a recent repair workshop at the VCFed
>>> museum in New Jersey. Bill Dromgoole is demonstrating progress on one
>>> of the tape drives for our Sperry-R
Here's a phone video from a recent repair workshop at the VCFed
museum in New Jersey. Bill Dromgoole is demonstrating progress on one
of the tape drives for our Sperry-Rand Univac 1219B mainframe (circa
mid-1960s).
https://www.instagram.com/p/BZxg7e7DJ3r/
Terrific!
It's really am
ed by Sperry Univac. According to the UTS 20 manual :
- Blank screen and long tone (the breakdown of my CPU board) : I'm
supposed to report this information to my Sperry Univac customer
services, point, no explanation
- SERIAL I/O CHANNEL B failure (the breakdown of the CPU board from U
On Tue, 3 Oct 2017 01:20:40 -0400
Evan Koblentz via cctalk wrote:
> Here's a phone video from a recent repair workshop at the VCFed
> museum in New Jersey. Bill Dromgoole is demonstrating progress on one
> of the tape drives for our Sperry-Rand Univac 1219B mainframe (cir
f the tape drives for
our Sperry-Rand Univac 1219B mainframe (circa mid-1960s).
https://www.instagram.com/p/BZxg7e7DJ3r/
Evan Koblentz, director
Vintage Computer Federation
a 501(c)3 educational non-profit
e...@vcfed.org
(646) 546-
www.vcfed.org
faceboo
Here's a phone video from a recent repair workshop at the VCFed museum
in New Jersey. Bill Dromgoole is demonstrating progress on one of the
tape drives for our Sperry-Rand Univac 1219B mainframe (circa mid-1960s).
https://www.instagram.com/p/BZxg7e7DJ3r/
On 8/13/17, 11:15 PM, "cctech on behalf of Dominique Carlier via cctech"
wrote:
>On 12/08/2017 19:35, Al Kossow via cctalk wrote:
>> the black one in the lower left
>>
>> it is a tantalum, which are known to short, try removing them
>>
>
>Yes ! It was this one that was shorted !
>I decided in th
You're probably right, but the work is so massive, and also this time I
would like to understand and target this breakdown instead of working
(as usual) in blind mode.
In addition, I do not see the same type of capacitor on the CPU board as
the one from the subsystem you quote as being known to
ch way I'd go to figure it out. I don't
have any documentation or anything other than having had one for about
a year for a project I did to go on.
Mine had no floppies, but had a printer interface option attached
which was the same as one that was on a Univac 1100 series mainfra
had no floppies, but had a printer interface option attached which
was the same as one that was on a Univac 1100 series mainframe I was
making a controller for. So I could just run a standalone test and if
my controller card was working it would spew on the printer.
That option was also one of t
Hi everybody,
Here is the next episode of the restoration of my UTS 40.
During the previous “season”, I was talking about buying a wreck of an
UTS 40 from the USA.
http://www.zeltrax.com/classiccmp_forum/annonce.jpg
I had taken the risk to buy it, after the conclusion of the sale, the
selle
On 12/08/2017 19:35, Al Kossow via cctalk wrote:
the black one in the lower left
it is a tantalum, which are known to short, try removing them
Yes ! It was this one that was shorted !
I decided in the same way to repair the second disk drive but this time
by taking some pictures.
http://ww
On 8/12/17 6:45 AM, Dominique Carlier via cctalk wrote:
> I did not know this type of case for capacitors
>
> http://www.zeltrax.com/classiccmp_forum/uts40/M2894-63_board03.jpg
the black one in the lower left
it is a tantalum, which are known to short, try removing them
It seems that you are right, I start successfully the Memorex 102 with
the PSU without flickering, this HDD uses the same voltages as the
Mitsubishi M2894-63D 8" disk drive (24VDC - 5VDC).
It remains me to find out which components are faulty
http://www.zeltrax.com/classiccmp_forum/uts40/M2894
Note that this produces the same result with either of the two disk
drive connected however your suggestion is interesting.
These two drives have the same age and some capacitors may become faulty
simultaneously. I will analyze the hypothesis, thanks!
I have an old hard drive (MEMOREX 102) with t
On 8/11/17 5:40 AM, Dominique Carlier via cctalk wrote:
> Hi all,
>
> I continued my investigations about the power supply if the 8406 subsystem.
> Here is what I observe:
>
> With the PSU in charge, I mean with a disk drive connected but without the
> +24V :
> +5V -5V +12V -12V: OK
> If I con
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