test-drb May 2011

test-drb@ccmp.vtda.org

162 participants
224 discussions

[rescue] ACM Publications, circa 1970, in Atlanta GA

by legalize＠xmission.com

If there's anyone in Atlanta that can rescue the SIGGRAPH, SIGCHI and Journal of Computing History portions of it, I'll cover shipping costs to me and give them some money for their time. In article <BANLkTimSRdNWh-xyFojJ9JEADOfpCXd2uQ at mail.gmail.com>, Sparr <sparr0 at gmail.com> writes: > I apologize for the poor timing of this. Had I known there was > interest, and that they were being discarded, earlier I would have > made better arrangements. > > They are at 675 Metropolitan Pkwy, Atlanta GA 30310. The gate code to > enter the complex is 9171* and they are stacked near the dumpsters at > the middle of the complex. > > They include publications from every SIG, including SIGGRAPH and > SIGPLAN and SIGCHI and ... > > The stack has suffered a few minutes of rain damage. I would say that > 10% of them got wet, although they are in a relatively dense stack on > a pallet so the ones on the bottom and in the middle are still fine. > > On Mon, May 16, 2011 at 9:45 AM, Sparr <sparr0 at gmail.com> wrote: > > A local geek organization is discarding a few thousand ACM > > publications from around 1968-1982. It includes complete years of > > Transactions, Journals, conference programs, various periodicals, etc. > > It's about one pallet load of boxes, so it would be expensive and > > complicated to ship. If anyone is willing and able to rescue them > > before they get recycled, let me know. > _______________________________________________ > rescue list - http://www.sunhelp.org/mailman/listinfo/rescue > -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://legalizeadulthood.wordpress.com/the-direct3d-graphics-pipeline/> Legalize Adulthood! <http://legalizeadulthood.wordpress.com>

13 years, 7 months

Looking for regional collectors

by tosteve＠yahoo.com

Hi, I run the website http://oldcomputers.net Almost every day I get offers from people wanting to get rid of their old computers, sometimes for free. Most of the time, though, the systems aren't worth the money to ship across the country to me in California. Therefore I am looking for other collectors across the country (or world) who wouldn't mind being recipients of mid or low value computers. Send me you name, location, email, and what you collect and I'll see if I can send some stuff your way. Do not REPLY, instead send to tosteve at yahoo.com Thank- Steven Stengel http://oldcomputers.net

13 years, 7 months

Looking for regional collectors

by tosteve＠yahoo.com

13 years, 7 months

PR1ME Computer SE50M

by michael.99.thompson＠gmail.com

The Rhode Island Computer Museum has a PR1ME Computer that says it is a model SE50M on the back of the CPU cabinet. I can't find any reference to that model number. Any idea how to identify this system? https://sites.google.com/site/ricmwarehouse/Home/equipment/prime-computer-s… -- Michael Thompson

13 years, 7 months

Variac and reforming caps...

by michael.99.thompson＠gmail.com

>From: Michael Kerpan <madcrow.maxwell at gmail.com> > One thing that puzzles me is that all these things seem to imply > powering the system's own power supply with a Variac rather than > bypassing it. Wouldn't it be possible to have connect a linear > transformer with the proper output voltages to a backplane and then > power that with the Variac to reform the caps only switching back to > the stock supply once the caps have been reformed? > > Mike The Variac transformer works because the voltage is AC. The crew at the CHM used a programmable DC power supply to reform the capacitors, after they disconnected them from the system.. -- Michael Thompson

13 years, 7 months

Variac and reforming caps...

by michael.99.thompson＠gmail.com

> From:?Geoffrey Reed <geoffr at zipcon.net> > For general use on old personal computer systems, S100, Kaypro, etc.... > Would a 5A variac be sufficient? > > And is there any write ups anywhere on how to use the variac when powering > up a system that hasn?t been powered up in > 10 years? There is lots of information available on reforming capactors. Some of it is useful. This is good introduction: http://www.nmr.mgh.harvard.edu/~reese/electrolytics/ A Variac can be used to reform caps in a linear power supply. Linear power supplies were common in older computers. The RICM recently used a Variac to reform capacitors during the resurection of a PDP-8/S. The power supplies in the 8/S were linear ferroresonant design, common in DEC equipment. With these power supplies the voltage on the capacitors will slowly increase in relation to the Variac output until you reach about 45 VAC. At that point the ferroresonant circuit kicks in and the output goes to full voltage. The big electrolytic filter caps survived this, but eventually the AC capacitors in the ferroresonant circuit failed. Replacements for those are easy to find. Newer systems, like the Kaypro, probably have a switching power supply. Switching power supplies usually will not have any outout until the Variac reaches the minimum acceptable input voltage for the power supply, usually something like 85-90 VAC. At that point the power supply turns on and tries to make the full output voltage. That can be really tough on old electrolytic capacitors. Eric Smith, as part of the PDP-1 restoration project at the CHM, developed software to control an Agilent power supply and very carefully reform capacitors. This is probably the best solution. http://www.brouhaha.com/~eric/software/wrec/ -- Michael Thompson

13 years, 7 months

Cray-Cyber Down for the Count?

by mjkerpan＠kerpan.com

A while ago, cray-cyber.org, which used to provide online access to various classic CDC and Cray supercomputers went down so that the owners could move the collection to a new home, with a note that access to the supercomputers would become available again in late 2010 or early 2011. Now we're almost halfway through 2011 and things are still down AND there's no word on what's up? Does anybody know what's going on here? Is the only public access classic supercomputer cluster in the world down for good? Mike

13 years, 7 months

latin stuff

by ken＠seefried.com

On 5/16/11 8:21 PM, Fred Cisin <cisin at xenosoft.com> wrote: > I used to have a copy of McCracken in Spanish. I have a Chinese language (Mandrin) Fortran textbook. Several, actually. Didn't help a bit. KJ

13 years, 7 months

Decwriter iii's for rescue in Astoria Oregon

by innfoclassics＠gmail.com

I just uncovered a couple of Decwriter IIIs that need to go. They have been stored outside but dry (plastic, foam, plastic and tarp). I got them from the basement of an automobile dealership auction about 4 years ago. Free if picked up soon. I don't want to take them apart. I could deliver from Seattle to Eugene (I-5) for gas. Otherwise they will be scrapped. Parts could be available including the print heads. Paxton -- Paxton Hoag Astoria, OR USA

13 years, 7 months

IBM 3741 available for rescue

by jfoust＠threedee.com

Thank you for finding me! Although I don't have a personal interest in that particular computer, I will forward your email to the Classic Computer Collector mailing list, and someone else may contact you directly. - John Like: http://musi.fwtunesco.org/wolz/index.html Location: http://goo.gl/cvD1E At 03:27 PM 5/16/2011, you wrote: >John: > >I?m not sure if you are interested, but I have a working IBM 3741. It has one 8? floppy and does appear to be loading tax software of some type. The monitor, keyboard, etc. all seems to work. It is in pretty clean condition with everything present. It even has an old parallel computer cable and plug. > >I hate to haul it to the dump and would love to give it to someone who will appreciate it for what it is ? the first commercial computer to move from punch cards to floppy. > >Please let me know if you are interested or if you know someone else who may be interested. > >I am located in New London, WI. > >Thanks, > >Henry >HenryM at inwia.org > >Notice of Confidentiality: This email, and any attachments, is intended only for the use of the addressee(s) and may contain privileged, private, or confidential information. Any distribution, reading, copying or use of this communication and any attachments by anyone other than the addressee is strictly prohibited and may be unlawful. If you have received this email in error, please immediately notify me by email (by replying to this message) or by phone ( 920-982-3244) and permanently destroy or delete the original and any copy or printout of this email and any attachments. >

13 years, 7 months

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test-drb May 2011