test-drb February 2004

test-drb@ccmp.vtda.org

275 participants
504 discussions

by toresbe＠ifi.uio.no

Allrighty, might as well run this question into a separate email for thread neatness (wishful thinking suggests I will get lots of answers for both posts ;)) The KSR-33 TTY prints properly if I reset all the codebars for the typehead. It also sends at least 6 bits correctly to the PDP-7 (I got the IO status panel working). What do I adjust? Please, explain with the fact that I don't know TTY lingo in mind. Thanks! -tsb

20 years, 4 months

waaa! Ebay Polymorphic 88

by allanh-cctalk＠kallisti.com

> Message: 3 > Date: Fri, 6 Feb 2004 10:43:24 -0800 > From: Ron Hudson <ron.hudson(a)sbcglobal.net> > Subject: Re: waaa! Ebay Pollymorphic 88 Item number: 2784817061 > To: "Dwight K. Elvey" <dwight.elvey(a)amd.com>, "General Discussion: > On-Topic and Off-Topic Posts" <cctalk(a)classiccmp.org> > Message-ID: <5861EA42-58D4-11D8-A773-000393C5A0B6(a)sbcglobal.net> > Content-Type: text/plain; charset=US-ASCII; format=flowed > > Dwight, > > Do you still have the original documentation for the ROM monitor? > Any way you could scan it? > pretty please? > > > I used to have a Polly 88, I was in the Navy on a destroyer, and > it was not a good environment for an s100 computer, When the ship > was at sea, it would rock back and forth a lot and my s100 would > suffer from "impact poisoning", Finally I traded my polly 88 for > an HP41C/Card Reader that was a bit more robust. > > Ron > ron.hudson(a)sbcglobal.net > > > On Friday, February 6, 2004, at 09:51 AM, Dwight K. Elvey wrote: > > > > > Hi All > > If someone on the list gets this, I have quite a bit of software > > that I've collected for this machine. It looks like someone has > > changed the machine to be a CPM machine. It looks to have both > > the serial ( rs232/20mil ) and cassette interfaces. It seems to > > be missing the video board ( where the keyboard would connect to ). > > If someone gets this, I do have a spare video board that I might > > be talked into trading for something else, if someone wanted to > > bring it back to an original condition. I also have quite a > > bit of documentation for the Poly88. It does require a parallel > > keyboard to work with the video board ( As I recall all console > > I/O can be revectored at boot using a ROM at 400h. This could > > make the serial be the console but I don't think the debug > > monitor is revectored ). > > Although, the ROM's on the CPU starts at address 0000h, there > > is a control bit that one can shadow the ROM and allow the machine > > to exist in complete RAM. I can explain this to anyone that wants > > to do so. The software I have is all Poly88 cassette based software. > > I have an assembler, BASIC, many of the Poly demo programs and > > I also have a ROM based tiny BASIC as well. I have also written > > code to bootstrap a system from the serial port ( does require > > the system debug monitor to function ). > > Dwight > > > >> From: "Ron Hudson" <ron.hudson(a)sbcglobal.net> > >> > >> And I am between jobs :^( > >> > >> > > > > > ------------------------------ > > Message: 4 > Date: Fri, 6 Feb 2004 19:26:27 -0000 > From: "Witchy" <witchy(a)binarydinosaurs.co.uk> > Subject: Merlin Tonto monitor update > To: "'General Discussion: On-Topic and Off-Topic Posts'" > <cctalk(a)classiccmp.org> > Message-ID: <E1ApBan-0000lE-0V(a)anchor-post-31.mail.demon.net> > Content-Type: text/plain; charset="iso-8859-1" > > Evenin' UK folks, afternoon US folks :) > > I've just stripped down the Tonto monitor that was screeching and I was > amazed and not a little alarmed to discover that the HT lead to the tube had > physically come away! > > How the hells can that happen when it's just been sitting on a shelf? After > appearing in the pix on my Tonto page it went back downstairs and sat on the > floor of the storage room for a few months before I found shelf space to put > it on! > > Weird. > > -- > Adrian/Witchy > Owner & Webmaster, Binary Dinosaurs > www.binarydinosaurs.co.uk - possibly the UK's biggest online computer museum > www.snakebiteandblack.co.uk - ex-monthly gothic shenanigans :o( > > > ------------------------------ > > Message: 5 > Date: Fri, 6 Feb 2004 21:14:40 +0100 (MET) > From: "Fred N. van Kempen" <waltje(a)pdp11.nl> > Subject: *grunt* > To: cctalk(a)classiccmp.org > Message-ID: <Pine.BSO.4.44.0402062113470.13947-100000(a)unibus.pdp11.nl> > Content-Type: TEXT/PLAIN; charset=US-ASCII > > Sorry, just gotta let off steam. Got two new DEC RoamAbout > cards... bah! These are the UK version, so wont to the one > in my AP... > > *bah* > > --f > > > -- > Fred N. van Kempen, DEC (Digital Equipment Corporation) Collector/Archivist > Visit the VAXlab Project at http://VAXlab.pdp11.nl/ > Visit the Archives at http://www.pdp11.nl/ > Email: waltje(a)pdp11.nl BUSSUM, THE NETHERLANDS / Mountain View, CA, USA > > > ------------------------------ > > Message: 6 > Date: Fri, 6 Feb 2004 21:29:38 +0100 (MET) > From: "Fred N. van Kempen" <waltje(a)pdp11.nl> > Subject: Re: gcc cross compiler for PDP-11 > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <Pine.BSO.4.44.0402062129160.13947-100000(a)unibus.pdp11.nl> > Content-Type: TEXT/PLAIN; charset=US-ASCII > > On Tue, 3 Feb 2004, Jochen Kunz wrote: > > > GCC 2.95 has serious problems corss compiling across the LP32 / LP64 > > boundary. I can say this out of my own experience as a NetBSD hacker. > Not relevant for the -11 backend :) > > --f > > > > ------------------------------ > > Message: 7 > Date: Fri, 6 Feb 2004 20:33:59 +0000 > From: meltie <lists(a)microvax.org> > Subject: Re: *grunt* > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org>, "Fred N. van Kempen" <waltje(a)pdp11.nl> > Message-ID: <200402062034.00301.lists(a)microvax.org> > Content-Type: text/plain; charset="iso-8859-1" > > On Friday 06 February 2004 20:14, Fred N. van Kempen wrote: > > Sorry, just gotta let off steam. Got two new DEC RoamAbout > > cards... bah! These are the UK version, so wont to the one > > in my AP... > > Won't they at least sync up to each other? What's so different about UK vs. > US versions? > > Want to dump them on someone in the UK? ;) > alex/melt > > > ------------------------------ > > Message: 8 > Date: Fri, 6 Feb 2004 21:39:37 +0100 (MET) > From: "Fred N. van Kempen" <waltje(a)pdp11.nl> > Subject: Re: *grunt* > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <Pine.BSO.4.44.0402062137160.13947-100000(a)unibus.pdp11.nl> > Content-Type: TEXT/PLAIN; charset=US-ASCII > > On Fri, 6 Feb 2004, meltie wrote: > > > On Friday 06 February 2004 20:14, Fred N. van Kempen wrote: > > > Sorry, just gotta let off steam. Got two new DEC RoamAbout > > > cards... bah! These are the UK version, so wont to the one > > > in my AP... > > > > Won't they at least sync up to each other? What's so different about UK vs. > > US versions? > Basically, the 2.4G cards using FH did not yet use the more or > less standardized channels, since they werent there yet. Instead, > different sets of usable channels were defined for each of the > various (mostly non-US) countries, making them largely incomatible > because of that :( > > What we *really* need is a firmware blaster, to re-blast a single > image into all of these critters- obviously, their hardware is > exactly the same, its just the software settings... > > > Want to dump them on someone in the UK? ;) > I might, eventually.. > > --f > > > ------------------------------ > > Message: 9 > Date: Fri, 06 Feb 2004 16:25:46 -0500 > From: "Jerome H. Fine" <jhfinexgs2(a)compsys.to> > Subject: Re: [SPAM] - Re: Computer Collectors List - update - Bayesian > Filter detected spam > To: General Discussion: On-Topic and Off-Topic Posts > <cctalk(a)classiccmp.org> > Message-ID: <4024065A.AC936305(a)compsys.to> > Content-Type: text/plain; charset=us-ascii > > >Brian Mahoney wrote: > > > (I hope this attaches to my first post. My first attempt came up as a > > separate post. ) > > The standalone list is at this site : > > http://www.geocities.com/computercollectors/index.htm > > The same list is also available on a link from my personl page and is here : > > http://www.geocities.com/SiliconValley/Horizon/9107/collectors.htm > > From: "Brian Mahoney" <brianmahoney(a)look.ca> > > To: <cctech(a)classiccmp.org> > > Sent: Friday, February 06, 2004 11:18 AM > > Subject: Computer Collectors List - update > > For several years I have maintained a list of computer collectors on my home > > page and for the last year I have had a specific site at another url. The > > list has over 40 names on it. Besides listing the collectors and their > > contact information (well, most of them anyway) there is an email address > > for the list itself and I send out emails to list whenever I get a query > > about donations or sales. > > > > Ok, so far so good. The problem is that I don't have email addresses for > > everyone on the list. Also, there may be members of this group who would > > like to be on the list. Therefore : > > > > 1. Anyone who wants to be on the list, please send me an email at : > > antiquecomputers(a)hotmail.com > > Make sure you have a good email addy in your response. Thanks! > > > > 2. Anyone on the list who has not provided me with an email by March 1st > > will be deleted from the list until an emaill address is provided. > > > > Please don't respond to this post, unless it is to comment on the lists, > > respond to : antiquecomputers(a)hotmail.com > > > > Lastly, I assume that nearly everyone here has some sort of site on the web. > > Mine has been up since 1995, relocated in 1997, and has spawned hundreds of > > emails from all over the world. The list of collectors provides me with a > > place to turn when I get leads about computers in Europe and the States. > > Since I don't buy computers any more, only taking donations, any offers of > > computers for sale or from locations outside of metro Toronto that are sent > > to my home page email adress, are sent to the members of the list. ALL > > requests to the antiquecomputers(a)hotmail.com email address are re-sent to > > members of the list. Hope this makes sense ! > > Jerome Fine replies: > > Your links can't be used by the version of Netscape that > I am using - V4.78. Do you think it might be possible to > make it backward compatible? > > Sincerely yours, > > Jerome Fine > -- > If you attempted to send a reply and the original e-mail > address has been discontinued due a high volume of junk > e-mail, then the semi-permanent e-mail address can be > obtained by replacing the four characters preceding the > 'at' with the four digits of the current year. > > > ------------------------------ > > Message: 10 > Date: Fri, 6 Feb 2004 21:41:02 -0000 > From: "Antonio Carlini" <arcarlini(a)iee.org> > Subject: RE: *grunt* > To: "'General Discussion: On-Topic and Off-Topic Posts'" > <cctalk(a)classiccmp.org> > Message-ID: <004a01c3ecf9$ec85cf30$5b01a8c0@athlon> > Content-Type: text/plain; charset="us-ascii" > > > What we *really* need is a firmware blaster, to re-blast a > > single image into all of these critters- obviously, their > > hardware is exactly the same, its just the software settings... > > The new (802.11b) firmware was available from Cabletron > and/or DNPG. But the firmware you seem to have (the > pre-802.11b stuff, ie the original stuff) is harder > to get hold of (ctron/dnpg stopped making it available > on the web years ago). So you want to find some > way of preserving it before you go overwriting it. > (Always assuming there *is* some way of getting > it off again). > > Antonio > > > -- > > --------------- > Antonio Carlini arcarlini(a)iee.org > > > > ------------------------------ > > Message: 11 > Date: Fri, 6 Feb 2004 23:10:10 +0100 (MET) > From: "Fred N. van Kempen" <waltje(a)pdp11.nl> > Subject: RE: *grunt* > To: arcarlini(a)iee.org, "General Discussion: On-Topic and Off-Topic > Posts" <cctalk(a)classiccmp.org> > Message-ID: <Pine.BSO.4.44.0402062307500.12807-100000(a)unibus.pdp11.nl> > Content-Type: TEXT/PLAIN; charset=US-ASCII > > On Fri, 6 Feb 2004, Antonio Carlini wrote: > > > The new (802.11b) firmware was available from Cabletron > > and/or DNPG. > Yes. > > > But the firmware you seem to have (the > > pre-802.11b stuff, ie the original stuff) is harder > > to get hold of (ctron/dnpg stopped making it available > > on the web years ago). > Yes, that was apparent. The real question is.. how/where do > we find it. > > > So you want to find some > > way of preserving it before you go overwriting it. > > (Always assuming there *is* some way of getting > > it off again). > The tools they used to localize the generic cards by blasting > a set of {firmware+settings} would be needed. I assume this > was done by DEC, not Ctron, so I'll just have to find someone > who knows about it and bother to no end... > > --f > > > ------------------------------ > > Message: 12 > Date: Fri, 6 Feb 2004 15:51:33 -0500 > From: "BowlARoll" <bowlarol(a)rochester.rr.com> > Subject: 3M/Imation DC2000 tapes > To: <cctech(a)classiccmp.org> > Message-ID: <000801c3ecf3$01813980$86d8d518@BOWLAROLL> > Content-Type: text/plain; charset="iso-8859-1" > > Hello: > > Are these tapes available and at what cost? You can reach me at 585-427-7250. Thanks. > > 20 Imation DC2000 40meg > > BillFrom cctalk-admin Fri Feb 6 13:03:59 2004 > Received: from c000.snv.cp.net (h019.c000.snv.cp.net [209.228.32.83]) > by huey.classiccmp.org (8.12.8p1/8.12.8) with SMTP id i16J3wOD065850 > for <cctalk(a)classiccmp.org>; Fri, 6 Feb 2004 13:03:58 -0600 (CST) > (envelope-from keith(a)saracom.com) > Received: (cpmta 638 invoked from network); 6 Feb 2004 10:51:48 -0800 > Received: from 209.228.32.74 (HELO mail.saracom.com.criticalpath.net) > by smtp.saracom.com (209.228.32.83) with SMTP; 6 Feb 2004 10:51:48 -0800 > X-Sent: 6 Feb 2004 18:51:48 GMT > Received: from [207.140.180.2] by mail.saracom.com with HTTP; > Fri, 06 Feb 2004 10:51:47 -0800 (PST) > Content-Type: text/plain; charset=iso-8859-1 > Content-Disposition: inline > Content-Transfer-Encoding: 7bit > MIME-Version: 1.0 > To: cctalk(a)classiccmp.org > From: order(a)saracom.com > X-Sent-From: keith(a)saracom.com > Date: Fri, 06 Feb 2004 10:51:47 -0800 (PST) > X-Mailer: Web Mail 5.6.0-2_sol28 > Message-Id: <20040206105148.1551.h010.c000.wm(a)mail.saracom.com.criticalpath.net> > X-Mailman-Approved-At: Fri, 06 Feb 2004 17:00:28 -0600 > Subject: Re: 600 Volt Outlet - was "General Discussion: On-Topic and > Off-Topic Posts" > X-BeenThere: cctalk(a)classiccmp.org > X-Mailman-Version: 2.1.2 > Precedence: list > Reply-To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > List-Id: General Discussion: On-Topic and Off-Topic Posts > <cctalk.classiccmp.org> > List-Unsubscribe: <http://www.classiccmp.org/mailman/listinfo/cctalk>, > <mailto:cctalk-request@classiccmp.org?subject=unsubscribe> > List-Archive: <http://www.classiccmp.org/pipermail/cctalk> > List-Post: <mailto:cctalk@classiccmp.org> > List-Help: <mailto:cctalk-request@classiccmp.org?subject=help> > List-Subscribe: <http://www.classiccmp.org/mailman/listinfo/cctalk>, > <mailto:cctalk-request@classiccmp.org?subject=subscribe> > > > Message: 21 > > Date: Fri, 6 Feb 2004 01:16:24 -0700 > > From: "ed sharpe" <esharpe(a)uswest.net> > > Subject: Re: Greedy E-bay idiots! > > To: "General Discussion: On-Topic and Off-Topic Posts" > > <cctalk(a)classiccmp.org> > > Message-ID: > > <002601c3ec89$82ca0c20$25696e44@SONYDIGITALED> > > Content-Type: text/plain; charset="iso-8859-1" > > > > now what the hell is a 600 volt outlet? > > > > 110 220 440 maybe but 600 volt? hmm..... > > > > > > I use it all the time but in a non-standard > application. I do AC power fault simulation on > Telco equipment. Since the tranformers are standard > off the shelf units, I thought I would ask an engineer > friend. > > Industrial induction motors use 1000 volt feed from a > delt transformer. It comes out 1000 line to line or > 577 line to ground. 577 is effectively 600. Most > of your wiring and other devices are rated at 600vac. > > Max > > ------------------------------ > > Message: 13 > Date: Sat, 7 Feb 2004 00:19:18 +0100 (MET) > From: "Fred N. van Kempen" <waltje(a)pdp11.nl> > Subject: *blush (RE: *grunt*) > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <Pine.BSO.4.44.0402070014220.12807-100000(a)unibus.pdp11.nl> > Content-Type: TEXT/PLAIN; charset=US-ASCII > > Hrrm. > > You know... sometimes it *really* helps to ask a woman whether > you still look OK or not..... > > I basically realized, that *although* the RoamAbout card *did* > see the access point, it did not get any traffic through. That > is, hmm, odd. > > ... until it daunted upon me. "AHEM. Is the segment on which > the AP resides, actually connected to the backbone????" > > So.. I ran upstairs, and sure enough... the BNC connector from > that segment was unplugged from the DEMPR. Waaaaah! > > Why? Well, I had a weird problem here when I was in the U.S., > and I had my jump-in sys admin disconnect all networks that were > not needed for core operations.... :( > > So there. It works now. At least the UK and DE/NL versions of > the RoamAbout cards *do* talk together. They both hate the U.S. > card, though.... > > Cheers, > Fred > -- > Fred N. van Kempen, DEC (Digital Equipment Corporation) Collector/Archivist > Visit the VAXlab Project at http://VAXlab.pdp11.nl/ > Visit the Archives at http://www.pdp11.nl/ > Email: waltje(a)pdp11.nl BUSSUM, THE NETHERLANDS / Mountain View, CA, USA > > > ------------------------------ > > Message: 14 > Date: Fri, 6 Feb 2004 18:39:18 -0500 (EST) > From: John Lawson <jpl15(a)panix.com> > Subject: Dec core mem on eBay > To: cctalk(a)classiccmp.org > Message-ID: <Pine.NEB.4.58.0402061834130.13021(a)panix2.panix.com> > Content-Type: TEXT/PLAIN; charset=US-ASCII > > > > I snagged this for $20.... just for a nice trophy. Suprising no one else > bid on it... > > > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3075270294&category=1479… > > > Anyway - thought it would look cool unfolded and hanging on the Machine > Room wall.... > > > > Cheers > > John > > > > ------------------------------ > > Message: 15 > Date: Fri, 6 Feb 2004 18:42:16 -0500 > From: "Brian Mahoney" <brianmahoney(a)look.ca> > Subject: Re: [SPAM] - Re: Computer Collectors List - update - Bayesian > Filter detected spam > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <001701c3ed0a$ecd5db40$0300a8c0(a)look.ca> > Content-Type: text/plain; charset="iso-8859-1" > > > ----- Original Message ----- > From: "Jerome H. Fine" <jhfinexgs2(a)compsys.to> > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Sent: Friday, February 06, 2004 4:25 PM > Subject: Re: [SPAM] - Re: Computer Collectors List - update - Bayesian > Filter detected spam > > > > >Brian Mahoney wrote: > I'm not really sure how to do that, I use Dreamweaver to set up the page. > I'll check the settings to see what comes up. I know that IE6 always says > 'done but with errors' and what the heck that means, I'll never know. Let me > work on it. > B.M. > > > Jerome Fine replies: > > > > Your links can't be used by the version of Netscape that > > I am using - V4.78. Do you think it might be possible to > > make it backward compatible? > > > > Sincerely yours, > > > > Jerome Fine > > -- > > If you attempted to send a reply and the original e-mail > > address has been discontinued due a high volume of junk > > e-mail, then the semi-permanent e-mail address can be > > obtained by replacing the four characters preceding the > > 'at' with the four digits of the current year. > > > > > > > ------------------------------ > > Message: 16 > Date: Fri, 06 Feb 2004 20:24:22 -0500 > From: "David V. Corbin" <dvcorbin(a)optonline.net> > Subject: RE: Dec core mem on eBay > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <JLEJKJEAMDDFLNHBPHENOEHAEIAA.dvcorbin(a)optonline.net> > Content-Type: text/plain; charset=us-ascii > > John, hopefully you are joking about using this card as "art". There are > many of us who could and would put it do good use in an active machine. > > David. > > > -----Original Message----- > From: cctalk-bounces(a)classiccmp.org > [mailto:cctalk-bounces@classiccmp.org]On Behalf Of John Lawson > Sent: Friday, February 06, 2004 6:39 PM > To: cctalk(a)classiccmp.org > Subject: Dec core mem on eBay > > > > > I snagged this for $20.... just for a nice trophy. Suprising no one else > bid on it... > > > http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3075270294&category=1479& > sspagename=STRK%3AMEBWN%3AIT&rd=1 > > > Anyway - thought it would look cool unfolded and hanging on the Machine > Room wall.... > > > > Cheers > > John > > > > ------------------------------ > > Message: 17 > Date: Fri, 6 Feb 2004 19:42:08 -0600 > From: "Jay West" <jwest(a)classiccmp.org> > Subject: Re: HP2000/Access - (benchmarks) > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <003301c3ed1b$99953be0$6400a8c0@HPLAPTOP> > Content-Type: text/plain; charset="UTF-8" > > Mike wrote.... > > Here's a quick chain test for doing 255 (+-) chains with timing for my > > SIMH configuration as described (about 23 sec.) I would hope that real > hardware > > would out perform it. If not I'll have to think about what could be wrong > with > > the simulator and come up with another test. Let me know what you get, > Jay, next > > time you have her up. > > Chain test results on dual 2100(32Kw) 7906 drive > > 28 2 > 28 45 > > this should mean about 43 seconds > > Notes: > 1) This test really doesn't test much other than the disk drive data > transfer rate, cpu excercising is negligable. > 2) An emulator should vastly outperform a real disk drive, especially > assuming "short cuts" are taken and internally the software isn't going > through the same steps the real hardware is. > > Jay West > > > ------------------------------ > > Message: 18 > Date: Fri, 6 Feb 2004 19:47:00 -0600 > From: "Jay West" <jwest(a)classiccmp.org> > Subject: stuff noticed at surplus in st. louis > To: <cctalk(a)classiccmp.org> > Message-ID: <003901c3ed1c$4856a150$6400a8c0@HPLAPTOP> > Content-Type: text/plain; charset="iso-8859-1" > > A couple of PowerMac 5260/100 machines, condition unknown (forgive me if > this is too recent for the list, I know nothing about them as to age). > > They recently got in a HUGE shipment of old tubes.. all different sizes... > some pretty odd looking ones too. Anyone want me to look for a particular > one? > > Jay West > > > ------------------------------ > > Message: 19 > Date: Fri, 6 Feb 2004 21:03:51 -0500 (EST) > From: John Lawson <jpl15(a)panix.com> > Subject: RE: Dec core mem on eBay > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <Pine.NEB.4.58.0402062050001.7518(a)panix2.panix.com> > Content-Type: TEXT/PLAIN; charset=US-ASCII > > > > On Fri, 6 Feb 2004, David V. Corbin wrote: > > > John, hopefully you are joking about using this card as "art". There are > > many of us who could and would put it do good use in an active machine. > > Yo Dave: Keep yer shirt on. > > If you look at the pix on the ebay page, you will notice that this is only > half the system, and I contacted the seller (who I know) - it's all they > have. Its just the core planes and the switching logic. Its a 32KW > stack, BTW... > > I have been active in this hobby for many years, have owned several very > rare systems and devices, and rescued and put back in service my share of > legacy computing machinery, software and docs and books. I give a lot of > volunteer time as well. I deplore folks who tear up computing history for > 'art' if there's a good chance that a system could be 'saved' otherwise. > There is a special place in Hell for one individual of my acquaintance, > who's "hobby" is collecting just the console panels from mainframes and > minis - the which Hobby he pursues with screwdriver and diagonal cutters. > He sees nothing wrong with that activity, BTW... ;{} > > In this case - I'm not *destroying* the board, and anyway it's condition > is unknown - could already be electrical trash - I won't know until I get > it. But nonetheless, I intend to frame it, open, and hang it on the wall > in my machine room, Dave. I think it's beautiful, and I think it's enough > of a piece of computing history that various people might like to have a > look at real core memory. Our IT guy at work has been doing computers for > a living for quite a while, and he had no real idea what the word 'core' > actually meant.... > > Now, if it came to my attention that there was a specific, rare or > one-of-a-kind machine that could be restored to full operation but for the > board that I have - you can bet it would be in FedEx the next day to that > site, and I'd find another. > > Anyway, DEC core stacks are not all that rare - two of the machines from > my last big collection had core memory. I want this one to be a display > piece in my personal collection... and so it shall be. > > > Cheerz > > John > > > ------------------------------ > > Message: 20 > Date: Fri, 06 Feb 2004 21:39:51 -0500 > From: "David V. Corbin" <dvcorbin(a)optonline.net> > Subject: RE: Dec core mem on eBay > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <JLEJKJEAMDDFLNHBPHENAEHDEIAA.dvcorbin(a)optonline.net> > Content-Type: text/plain; charset=us-ascii > > John, > > Glad to hear it, sorry if I jumped on you, but it had been a rough day, and > I recently lost a good shot at an acquisition to a person known for "kut and > scrap". > > My apologies. > > David. > > -----Original Message----- > From: cctalk-bounces(a)classiccmp.org > [mailto:cctalk-bounces@classiccmp.org]On Behalf Of John Lawson > Sent: Friday, February 06, 2004 9:04 PM > To: General Discussion: On-Topic and Off-Topic Posts > Subject: RE: Dec core mem on eBay > > > > > On Fri, 6 Feb 2004, David V. Corbin wrote: > > > John, hopefully you are joking about using this card as "art". There are > > many of us who could and would put it do good use in an active machine. > > Yo Dave: Keep yer shirt on. > > If you look at the pix on the ebay page, you will notice that this is only > half the system, and I contacted the seller (who I know) - it's all they > have. Its just the core planes and the switching logic. Its a 32KW > stack, BTW... > > I have been active in this hobby for many years, have owned several very > rare systems and devices, and rescued and put back in service my share of > legacy computing machinery, software and docs and books. I give a lot of > volunteer time as well. I deplore folks who tear up computing history for > 'art' if there's a good chance that a system could be 'saved' otherwise. > There is a special place in Hell for one individual of my acquaintance, > who's "hobby" is collecting just the console panels from mainframes and > minis - the which Hobby he pursues with screwdriver and diagonal cutters. > He sees nothing wrong with that activity, BTW... ;{} > > In this case - I'm not *destroying* the board, and anyway it's condition > is unknown - could already be electrical trash - I won't know until I get > it. But nonetheless, I intend to frame it, open, and hang it on the wall > in my machine room, Dave. I think it's beautiful, and I think it's enough > of a piece of computing history that various people might like to have a > look at real core memory. Our IT guy at work has been doing computers for > a living for quite a while, and he had no real idea what the word 'core' > actually meant.... > > Now, if it came to my attention that there was a specific, rare or > one-of-a-kind machine that could be restored to full operation but for the > board that I have - you can bet it would be in FedEx the next day to that > site, and I'd find another. > > Anyway, DEC core stacks are not all that rare - two of the machines from > my last big collection had core memory. I want this one to be a display > piece in my personal collection... and so it shall be. > > > Cheerz > > John > > > ------------------------------ > > Message: 21 > Date: Fri, 6 Feb 2004 18:51:18 -0800 (PST) > From: "O. Sharp" <ohh(a)drizzle.com> > Subject: RE: Dec core mem on eBay > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <Pine.LNX.4.44.0402061834350.9788-100000(a)drizzle.com> > Content-Type: TEXT/PLAIN; charset=US-ASCII > > > Quoth John Lawson: > > > If you look at the pix on the ebay page, you will notice that this is only > > half the system, and I contacted the seller (who I know) - it's all they > > have. Its just the core planes and the switching logic. Its a 32KW > > stack, BTW... > > 32Kw x 18, and with ICs around the core planes... was this for a PDP-15, > or perhaps a PDP-9? > > > [...] nonetheless, I intend to frame it, open, and hang it on the wall > > in my machine room, Dave. I think it's beautiful, and I think it's enough > > of a piece of computing history that various people might like to have a > > look at real core memory. Our IT guy at work has been doing computers for > > a living for quite a while, and he had no real idea what the word 'core' > > actually meant.... > > Core memories are indeed beautiful. That is, until you have to find and > repair a bad connection on one... <cringe> ...well, okay, they're _still_ > beautiful, but in an infinitely more frustrating sort of way. :) > > I think it's amusing that there are computer people who have never seen or > worked with core memory. O'course, I also have coworkers who have never > owned a 33-1/3 record, and more recently coworkers who think the idea of a > telephone with a cord attached is antiquated. Damn. I _am_ getting old, > aren't I? :) > > -O.- > > ...but then, I've never used a punch-card or a drum memory, so maybe I > _am_ young. :) :) > > > ------------------------------ > > Message: 22 > Date: Fri, 6 Feb 2004 21:54:53 -0500 (EST) > From: John Lawson <jpl15(a)panix.com> > Subject: RE: Dec core mem on eBay > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <Pine.NEB.4.58.0402062144510.7518(a)panix2.panix.com> > Content-Type: TEXT/PLAIN; charset=US-ASCII > > > > On Fri, 6 Feb 2004, David V. Corbin wrote: > > > John, > > > > Glad to hear it, sorry if I jumped on you, but it had been a rough day, and > > I recently lost a good shot at an acquisition to a person known for "kut and > > scrap". > > > Well I know. There's an original ad for the Bendix G-15 (I had one > once...) on eBay that I stopped bidding on after it got above $20... but > the high bidder's 'me' page says he's a preservationist, so we'll see. > > And I've missed many things over the years... "Oh, we thought that was > junk." > > For example - I work in the same building as a manufacturing company > with dozens of metal-working machines. I'm good friends with the foreman, > who has been an NC and CNC master machinist for many years. I was telling > him about my collection - and he said, "Hey - you don't want an old > Flexowriter or two...? they're up on the shelf in my old shop in Palo > Alto." > > Well you can imagine my response. BUT: > > Long story short... they were tossed in the dumpster in September of > last year to make room for an upgraded phone system.... > > > YYYAAHHHHHHH!!!!!!!!! ;{ GRRRRR... > > > So it's part and parcel of our Hobby... just because *I* see a rack of > PDP11 stuff in a certain light doesn't necessarily map onto the > conciousness of the poor schmoe who has to get it out of the warehouse and > onto the loading dock and into the roll-off before the scrap company shows > up to haul all that old shit away... > > > And thanks for your well-meant concern! Without us, there'd be no > LGP-20s, Bendix G-15s, Apple Is.... left in the world. > > > Cheers > > John > > > > ------------------------------ > > Message: 23 > Date: Fri, 6 Feb 2004 20:59:49 -0600 > From: "Jay West" <jwest(a)classiccmp.org> > Subject: Atari available > To: <cctalk(a)classiccmp.org> > Message-ID: <004001c3ed26$7342e590$6400a8c0@HPLAPTOP> > Content-Type: text/plain; charset="iso-8859-1" > > Local surplus dealer has an Atari 800XL available, he held it for me cause > he knows I collect computers. However, I have no interest in it. He just > wants someone to make him an offer. No monitor or power supply, condition > unknown. He probably doesn't want much for it. Email me if you want his > contact info. > > Jay West > > > ------------------------------ > > Message: 24 > Date: Fri, 06 Feb 2004 22:04:36 -0500 > From: "David V. Corbin" <dvcorbin(a)optonline.net> > Subject: RE: Dec core mem on eBay > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <JLEJKJEAMDDFLNHBPHENMEHDEIAA.dvcorbin(a)optonline.net> > Content-Type: text/plain; charset=us-ascii > > -0.- > > Speaking of vinyl...Do you have any 78s or even better 16s? (I have about > 40 from 1955 and earlier!) > > If you never dropped a box on unmarked, non-sequenced cards, you havent > lived!!! > > =============================== > > John. > > I know a person (local here on LI) who has 3x ASR-33, 1x ASR-43, 1x > Freiden Flexowriter (exact model unknown at this point). > > All believed to be in working order. > > The problem is that will only dig them out of storage for someone who will > take the entire lot. I have no interest in the Flexowriter (but would never > want to see one destroyed), and can really only use one of the ASR-33's. If > you would be interested in helping to split up the lot (he wants a fairly > high price, but if the quality is good....), please contact me off list. > > ========================== > > David... > > > > ------------------------------ > > Message: 25 > Date: Fri, 06 Feb 2004 22:09:53 -0500 > From: Curt Vendel <curt(a)atarimuseum.com> > Subject: Re: Atari available > To: General Discussion: On-Topic and Off-Topic Posts > <cctalk(a)classiccmp.org> > Message-ID: <40245701.9080408(a)atarimuseum.com> > Content-Type: text/plain; charset=us-ascii; format=flowed > > Thanks Jay, I have plenty of them, I'm going to pass. > > > Curt > > > > Jay West wrote: > > >Local surplus dealer has an Atari 800XL available, he held it for me cause > >he knows I collect computers. However, I have no interest in it. He just > >wants someone to make him an offer. No monitor or power supply, condition > >unknown. He probably doesn't want much for it. Email me if you want his > >contact info. > > > >Jay West > > > > > > > > > > -- > > > Curt Vendel & Karl Morris > ----------------------------------------------------------------------- > The Atari Museum > http://www.atarimuseum.com > > The Atari Explorer > http://www.atari-explorer.com > > > > > > > ------------------------------ > > Message: 26 > Date: Fri, 6 Feb 2004 21:10:44 -0600 > From: "Jay West" <jwest(a)classiccmp.org> > Subject: more on ibm paradise card > To: <cctalk(a)classiccmp.org> > Message-ID: <006201c3ed27$f9cf5d90$6400a8c0@HPLAPTOP> > Content-Type: text/plain; charset="iso-8859-1" > > Ok, took a closer look at the paradise card in my IBM 5150. > > It's actually two full length boards, stacked together with standoffs. The > "main" board has on the back bracket (from top to bottom), a two position > slide switch, a DE9, an RCA jack, and another DE9. Has a sticker saying > "DM104338", I'm guessing a serial number maybe. Etched on the board is "Assy > 15100". > > On the second board in the stack, it says "Paradise Systems, Inc." and > "Multidisplay card". Silkscreened on the board is "Assy 15200", and "CADAC > M01". Also has a sticker, "DM504338", and here's the kicker... hanging off > this full length "daughter card" is a ribbon cable that goes to a 2nd > bracket with a DB25F connector, I would guess parallel port. > > >From googling on the net, best I can decipher (VERY little info on it), it > may be a combo MDA/CGA card. > > Can anyone fill in any more info? > > Jay West > > > ------------------------------ > > Message: 27 > Date: Fri, 6 Feb 2004 21:12:43 -0600 > From: "Jay West" <jwest(a)classiccmp.org> > Subject: Re: Dec core mem on eBay > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <006a01c3ed28$4103d1f0$6400a8c0@HPLAPTOP> > Content-Type: text/plain; charset="iso-8859-1" > > > If you never dropped a box on unmarked, non-sequenced cards, you havent > > lived!!! > If they are unmarked, there is no problem ;) > > I'm a young 39, and I HAVE programmed on punched cards, both on an IBM 24 I > think it was, submitting programs to VM/CMS/HASP, and also on an HP2000C & > HP2000/Access :) > > > ------------------------------ > > Message: 28 > Date: Fri, 06 Feb 2004 23:08:36 -0500 > From: "David V. Corbin" <dvcorbin(a)optonline.net> > Subject: RE: Dec core mem on eBay > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <JLEJKJEAMDDFLNHBPHENKEHFEIAA.dvcorbin(a)optonline.net> > Content-Type: text/plain; charset=iso-8859-1 > > >>> If you never dropped a box on unmarked, non-sequenced cards, you havent > >>> lived!!! > > >>If they are unmarked, there is no problem ;) > > I was not referring to un-punched cards, but rather to cards that contained > ordered data (such as program source without line numbers) which had not > been marked with a pen/pencil/crayon diagonally across the top of the deck. > > Without the mark, sorting out the cards was virtually impossible. At least > with a diagonal mark each card would have a short line on the top edge. > Cards from the front of the deck would have the line on the left, cards from > the back on the right. This gave a quick method of getting the cards back > into order. A card that was out of sequence would show rather quickly when > the deck was re-assembled. > > > > > > ------------------------------ > > Message: 29 > Date: Sat, 7 Feb 2004 06:00:50 +0100 > From: "Nico de Jong" <nico(a)farumdata.dk> > Subject: Re: 3M/Imation DC2000 tapes > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <002101c3ed37$5bab19f0$2201a8c0@finans> > Content-Type: text/plain; charset="iso-8859-1" > > > >Are these tapes available and at what cost? You can reach me at > 585-427-7250. Thanks. > >20 Imation DC2000 40meg > >Bill > > I have at least 10 DC2120 tapes from Mitsubishi available, all new AFAIR > > We can discuss the price. Dont forget the Postage > > Nico > > > ------------------------------ > > Message: 30 > Date: Fri, 6 Feb 2004 22:29:03 -0700 > From: CRC <technobug(a)comcast.net> > Subject: Aluminum Electrolytics (was: M7891-DC 2a fuse on +12? fixed!) > To: cctalk(a)classiccmp.org > Message-ID: <8A7F02B6-592E-11D8-AAFD-003065B0DA30(a)comcast.net> > Content-Type: text/plain; charset=US-ASCII; format=flowed > > On On Thu, 5 Feb 2004 15:47:34 -0800 (PST), Vintage Computer Festival > <vcf(a)siconic.com> wrote: > > > One second? I've always been told to do this over the course of at > > least > > a couple hours in 5V increments. > > > > If I can be doing this in a much quicker time then I'd really like to > > know > > about it. > > > [...] > And on Thu, 5 Feb 2004 19:04:52 -0500 (EST), ohn Lawson > <jpl15(a)panix.com> also wrote: > > > > Then duck! IMHO opinion, and over 40+ years experience, to reform > > funky caps takes anywhere from a few minutes to over an hour, > > depending on > > many variables. If you think you've formed an electrolytic in one > > second, > > it was either tiny or good-to-begin-with. > > > > But the thing most folks forget is to somehow monitor the *current* > > being drawn during the Process of Reformation. > > > > Here endeth the Lesson. > > > > > > > >> > >> One second? I've always been told to do this over the course of at > >> least > >> a couple hours in 5V increments. > >> > > > > > > Again - it depends on the voltage/capacity of the filters involved, > > and > > just how "bad" gthey are. One simply cannot place an arbitrary > > voltage/time delta on all power supplies. > > > > The Ammeter (or it's analog) is here your friend. > > > Also at Thu, 5 Feb 2004 16:12:53 -0800, "vrs" <vrs(a)msn.com> commented: > >>>> > > >>>> To safely re-energize a piece of equipment that is long in the tooth > >>>> and has been sitting around for some time, you have to bring the > >>>> voltage up relatively slowly to allow the electrolytic caps to > >>>> re-polarize. Everyone who is collecting should own a good-sized > > Variac. > >>>> You power the box up by bringing the voltage from naught to the > >>>> operational level with the Variac over a period of about a second or > >> > >> Then duck! IMHO opinion, and over 40+ years experience, to reform > >> funky caps takes anywhere from a few minutes to over an hour, > >> depending on > >> many variables. If you think you've formed an electrolytic in one > >> second, > >> it was either tiny or good-to-begin-with. > > > > When I read this, I took it to mean the Variac was a preferred method > > for > > turning on equipment *after* the caps had been reformed, as a matter of > > routine. (Otherwise it made no sense to me, based on what I know of > > reformation.) That may not be a good idea, but I couldn't dismiss it > > out of > > hand. > > > > I reference <http://www.nichicon.com/english/lib/alminium.pdf>, and > excellent overview of aluminum capacitors... > > The controlling parameter in reforming a capacitor is the amount of > heat generated. Generate too much and you blow things up. We have to > consider two cases: the capacitor is in circuit, or out of circuit. > > In the latter case, the recommended method of reforming is by applying > the forming voltage through a limiting resistor and then letting the > capacitor form at voltage over a period of time with the limiting > resistor in circuit. As commented above, the current should be > monitored, but the critical term is the final leakage current. If it is > out of spec, there is nothing you can do... A capacitor manufacturer > used to be in town and they had to monitor old stock for mil spec > reasons. Their criteria for reforming old stock was a case temp rise of > no more than 5 degrees C and the leakage current had to be in spec in > less than 10 minutes. > > An old electrolytic that takes a long time to reform has probably lost > electrolyte and should be considered suspect (its ESR is probably > miserable and capacitance below spec). > > The case of in-circuit caps: With a lot of equipment, if you put it in > a brown-out condition, you can fry the silicon. Older switchers are > notorious for burning up when operated below their minimum voltage for > any length of time. In any case, when lighting equipment, the primary > concern is the front end caps. If the leakage current is substantial, > you will blow the fuse or take out the rectifier (valves don't have > this problem). By using a Variac to bring up the voltage over several > seconds, you mitigate the surge and allow initial reforming to take > place. If things go, you might as well replace the caps. > > Depending on the power supply, caps down stream will either see the > operating voltage and have to "live" or, in the case where the power > supply current limits, will pull down the power supply until formed, > if . In the case of switchers, they have a tendency to *turn on* if > substantially over-rated (hey, remember we have been taught that it's > only current that counts ;<)). > > So all is not cut and dried. You have to know what you are working > with... Hey, and I match your 40+ and raise you a few... > > > ------------------------------ > > Message: 31 > Date: Fri, 6 Feb 2004 22:30:19 -0700 > From: "ed sharpe" <esharpe(a)uswest.net> > Subject: Re: 600 Volt Outlet - was "General Discussion: On-Topic > andOff-Topic Posts" > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <002301c3ed3b$799977a0$25696e44@SONYDIGITALED> > Content-Type: text/plain; charset="iso-8859-1" > > Yes I know the wiring is rated at 600 but I have not seen any semi modern > gear that required it.... > > ed! > ----- Original Message ----- > From: <order(a)saracom.com> > To: <cctalk(a)classiccmp.org> > Sent: Friday, February 06, 2004 11:51 AM > Subject: Re: 600 Volt Outlet - was "General Discussion: On-Topic > andOff-Topic Posts" > > > > > Message: 21 > > > Date: Fri, 6 Feb 2004 01:16:24 -0700 > > > From: "ed sharpe" <esharpe(a)uswest.net> > > > Subject: Re: Greedy E-bay idiots! > > > To: "General Discussion: On-Topic and Off-Topic Posts" > > > <cctalk(a)classiccmp.org> > > > Message-ID: > > > <002601c3ec89$82ca0c20$25696e44@SONYDIGITALED> > > > Content-Type: text/plain; charset="iso-8859-1" > > > > > > now what the hell is a 600 volt outlet? > > > > > > 110 220 440 maybe but 600 volt? hmm..... > > > > > > > > > > I use it all the time but in a non-standard > > application. I do AC power fault simulation on > > Telco equipment. Since the tranformers are standard > > off the shelf units, I thought I would ask an engineer > > friend. > > > > Industrial induction motors use 1000 volt feed from a > > delt transformer. It comes out 1000 line to line or > > 577 line to ground. 577 is effectively 600. Most > > of your wiring and other devices are rated at 600vac. > > > > Max > > > > > > > > ------------------------------ > > Message: 32 > Date: Fri, 6 Feb 2004 21:45:30 -0800 > From: Al Kossow <aek(a)spies.com> > Subject: Re: Dec core mem on eBay > To: classiccmp(a)classiccmp.org > Message-ID: <200402070545.i175jUMe011877(a)spies.com> > > > > 32Kw x 18, and with ICs around the core planes... was this for a PDP-15, > or perhaps a PDP-9? > > -- > > byte parity > > > ------------------------------ > > Message: 33 > Date: Sat, 7 Feb 2004 00:56:50 -0500 (EST) > From: John Lawson <jpl15(a)panix.com> > Subject: Re: Aluminum Electrolytics (was: M7891-DC 2a fuse on +12? > fixed!) > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <Pine.NEB.4.58.0402070042140.7518(a)panix2.panix.com> > Content-Type: TEXT/PLAIN; charset=US-ASCII > > > > On Fri, 6 Feb 2004, CRC wrote: > > > > > So all is not cut and dried. You have to know what you are working > > with... Hey, and I match your 40+ and raise you a few... > > > > > > [finds reading glasses, Geritol, don't need teeth... lessee here] > > > > Waaaallll.... no duh! BUT: I was preaching to the congregation, not the > choir. > > You and I probably can deliver chapter and verse on the care and feeding > of fundamental components, their history and evolution, physics, > chemistry, mechanics and electronics of them... no doubt. > > But a lot of folks on the list (most of the folks on the List) are not EEs > or MSEs or PhDEs... and we have a very mixed approach to actual > 'electronics' - from those who have long careers behind them in design and > implementation of electronic circuits and devices - to those to whom > electricity is a mystery, an unknown field. > > So when it is stated in simple language that one can form/reform > questionable electrolytics in 'one second' with a Variac (or whatever) - > this is exposing people to danger and property to damage, IMHO. > > That's the point I was trying to make - that there is no 'general case' > when bringing up gear with long inop times - and that one cannot prescribe > a fixed time span to reform the caps in a (linear) power supply by the > Variac method, unless one is aware of the various other points you bring > up. > > > And of course you're spot-on in reference to SMPSUs - 'brown' input > voltages will often kill 'em dead. > > And speaking of War Stories: Ever been in the same room with an > exploding 1.7F 800VDC storage bank? > > It's LOUD...... > > > ;} > > > > Cheers > > John > > > > ------------------------------ > > Message: 34 > Date: Fri, 6 Feb 2004 22:15:30 -0800 (PST) > From: SHAUN RIPLEY <vax3900(a)yahoo.com> > Subject: Re: stuff noticed at surplus in st. louis > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <20040207061530.91584.qmail(a)web60704.mail.yahoo.com> > Content-Type: text/plain; charset=us-ascii > > Why not grab them all and put them on Ebay. There are > other groups of people who collect old tubes. I > personally have a tube radio... It is junk in their > eyes though (it is an AA5). I know that people are > looking for 300B tubes, and some other big tubes. Do > them a favor, save those tubes. > > vax3900 > > --- Jay West <jwest(a)classiccmp.org> wrote: > > A couple of PowerMac 5260/100 machines, condition > > unknown (forgive me if > > this is too recent for the list, I know nothing > > about them as to age). > > > > They recently got in a HUGE shipment of old tubes.. > > all different sizes... > > some pretty odd looking ones too. Anyone want me to > > look for a particular > > one? > > > > Jay West > > > > __________________________________ > Do you Yahoo!? > Yahoo! Finance: Get your refund fast by filing online. > http://taxes.yahoo.com/filing.html > > ------------------------------ > > Message: 35 > Date: Sat, 7 Feb 2004 01:15:20 -0500 (EST) > From: der Mouse <mouse(a)Rodents.Montreal.QC.CA> > Subject: Re: Aluminum Electrolytics (was: M7891-DC 2a fuse on +12? > fixed!) > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: <200402070634.BAA00287(a)Sparkle.Rodents.Montreal.QC.CA> > Content-Type: text/plain; charset="iso-8859-1" > > > And speaking of War Stories: Ever been in the same room with an > > exploding 1.7F 800VDC storage bank? > > > It's LOUD...... > > Hardly surprising, given how much energy is lurking therein. If my > arithmetic is right, that's about .3kWh. Release it all at once - or > even any significant fraction thereof - and yes, it's gonna go bang! > > What was a 1.36 kilocoulomb bank used for, anyway? Railgun? > > /~\ The ASCII der Mouse > \ / Ribbon Campaign > X Against HTML mouse(a)rodents.montreal.qc.ca > / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B > > ------------------------------ > > Message: 36 > Date: Sat, 07 Feb 2004 02:34:48 -0500 > From: "J.C. Wren" <jcwren(a)jcwren.com> > Subject: Re: Aluminum Electrolytics > To: General Discussion: On-Topic and Off-Topic Posts > <cctalk(a)classiccmp.org> > Message-ID: <40249518.3080703(a)jcwren.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > der Mouse wrote: > > >>And speaking of War Stories: Ever been in the same room with an > >>exploding 1.7F 800VDC storage bank? > >> > >> > > > > > > > >>It's LOUD...... > >> > >> > > > >Hardly surprising, given how much energy is lurking therein. If my > >arithmetic is right, that's about .3kWh. Release it all at once - or > >even any significant fraction thereof - and yes, it's gonna go bang! > > > >What was a 1.36 kilocoulomb bank used for, anyway? Railgun? > > > >/~\ The ASCII der Mouse > >\ / Ribbon Campaign > > X Against HTML mouse(a)rodents.montreal.qc.ca > >/ \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B > > > > > I'd guess a medium power laser. > > --jc > > End of cctalk Digest, Vol 6, Issue 15 > ************************************* -- Allan N. Hessenflow allanh(a)kallisti.com

20 years, 4 months

SGI GDM-20D11 monitor troubleshooting

by rigdonj＠cfl.rr.com

Does anyone have any experience working on these? This is the third one that I've picked up and they've all been bad. This one worked briefly but now it's doing the same as the other two; no video and both the red power light and yellow light are flashing. I talked to a friend of mine that's used these a lot and also says that they don't last long. FWIW I think this is made by Sony and is also used by SUN. Joe

20 years, 4 months

Pacific 4 memory installation guides

by joel.fox＠sympatico.ca

Hi Bob. This is a shot in the dark:: Google came up with your message offering copies of the Pacific 4 Memory installation guide. (cf. http://www.classiccmp.org/pipermail/cctech/2003-April/013105.html) Is there a chance you might still have them around? Thanks for any help you can offer. Joel Fox Kingston, ON

20 years, 4 months

FS: CDP-1802 User Manual

by charlesmorris＠direcway.com

I have an extra RCA #MPM-201B manual ("User Manual for the CDP1802 COSMAC Microprocessor") in very good condition, except "C.Morris" written on upper right corner of cover (belonged to my dad). If anyone's interested, make me an offer... thanks Charles

20 years, 4 months

Aluminum Electrolytics (was: M7891-DC 2a fuse on +12? fixed!)

by technobug＠comcast.net

On On Thu, 5 Feb 2004 15:47:34 -0800 (PST), Vintage Computer Festival <vcf(a)siconic.com> wrote: > One second? I've always been told to do this over the course of at > least > a couple hours in 5V increments. > > If I can be doing this in a much quicker time then I'd really like to > know > about it. > [...] And on Thu, 5 Feb 2004 19:04:52 -0500 (EST), ohn Lawson <jpl15(a)panix.com> also wrote: > Then duck! IMHO opinion, and over 40+ years experience, to reform > funky caps takes anywhere from a few minutes to over an hour, > depending on > many variables. If you think you've formed an electrolytic in one > second, > it was either tiny or good-to-begin-with. > > But the thing most folks forget is to somehow monitor the *current* > being drawn during the Process of Reformation. > > Here endeth the Lesson. > > > >> >> One second? I've always been told to do this over the course of at >> least >> a couple hours in 5V increments. >> > > > Again - it depends on the voltage/capacity of the filters involved, > and > just how "bad" gthey are. One simply cannot place an arbitrary > voltage/time delta on all power supplies. > > The Ammeter (or it's analog) is here your friend. > Also at Thu, 5 Feb 2004 16:12:53 -0800, "vrs" <vrs(a)msn.com> commented: >>>> >>>> To safely re-energize a piece of equipment that is long in the tooth >>>> and has been sitting around for some time, you have to bring the >>>> voltage up relatively slowly to allow the electrolytic caps to >>>> re-polarize. Everyone who is collecting should own a good-sized > Variac. >>>> You power the box up by bringing the voltage from naught to the >>>> operational level with the Variac over a period of about a second or >> >> Then duck! IMHO opinion, and over 40+ years experience, to reform >> funky caps takes anywhere from a few minutes to over an hour, >> depending on >> many variables. If you think you've formed an electrolytic in one >> second, >> it was either tiny or good-to-begin-with. > > When I read this, I took it to mean the Variac was a preferred method > for > turning on equipment *after* the caps had been reformed, as a matter of > routine. (Otherwise it made no sense to me, based on what I know of > reformation.) That may not be a good idea, but I couldn't dismiss it > out of > hand. > I reference <http://www.nichicon.com/english/lib/alminium.pdf>, and excellent overview of aluminum capacitors... The controlling parameter in reforming a capacitor is the amount of heat generated. Generate too much and you blow things up. We have to consider two cases: the capacitor is in circuit, or out of circuit. In the latter case, the recommended method of reforming is by applying the forming voltage through a limiting resistor and then letting the capacitor form at voltage over a period of time with the limiting resistor in circuit. As commented above, the current should be monitored, but the critical term is the final leakage current. If it is out of spec, there is nothing you can do... A capacitor manufacturer used to be in town and they had to monitor old stock for mil spec reasons. Their criteria for reforming old stock was a case temp rise of no more than 5 degrees C and the leakage current had to be in spec in less than 10 minutes. An old electrolytic that takes a long time to reform has probably lost electrolyte and should be considered suspect (its ESR is probably miserable and capacitance below spec). The case of in-circuit caps: With a lot of equipment, if you put it in a brown-out condition, you can fry the silicon. Older switchers are notorious for burning up when operated below their minimum voltage for any length of time. In any case, when lighting equipment, the primary concern is the front end caps. If the leakage current is substantial, you will blow the fuse or take out the rectifier (valves don't have this problem). By using a Variac to bring up the voltage over several seconds, you mitigate the surge and allow initial reforming to take place. If things go, you might as well replace the caps. Depending on the power supply, caps down stream will either see the operating voltage and have to "live" or, in the case where the power supply current limits, will pull down the power supply until formed, if . In the case of switchers, they have a tendency to *turn on* if substantially over-rated (hey, remember we have been taught that it's only current that counts ;<)). So all is not cut and dried. You have to know what you are working with... Hey, and I match your 40+ and raise you a few...

20 years, 4 months

waaa! Ebay Polymorphic 88

by allanh-cctalk＠kallisti.com

Ron Hudson wrote: > Do you still have the original documentation for the ROM monitor? > Any way you could scan it? > pretty please? I could scan mine, probably next week or the week after, if noone does that sooner. allan -- Allan N. Hessenflow allanh(a)kallisti.com

20 years, 4 months

600 Volt Outlet - was "General Discussion: On-Topic and Off-Topic Posts"

by order＠saracom.com

> Message: 21 > Date: Fri, 6 Feb 2004 01:16:24 -0700 > From: "ed sharpe" <esharpe(a)uswest.net> > Subject: Re: Greedy E-bay idiots! > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk(a)classiccmp.org> > Message-ID: > <002601c3ec89$82ca0c20$25696e44@SONYDIGITALED> > Content-Type: text/plain; charset="iso-8859-1" > > now what the hell is a 600 volt outlet? > > 110 220 440 maybe but 600 volt? hmm..... > > I use it all the time but in a non-standard application. I do AC power fault simulation on Telco equipment. Since the tranformers are standard off the shelf units, I thought I would ask an engineer friend. Industrial induction motors use 1000 volt feed from a delt transformer. It comes out 1000 line to line or 577 line to ground. 577 is effectively 600. Most of your wiring and other devices are rated at 600vac. Max

20 years, 4 months

atari transputer workstation

by michaelp＠meer.net

i just found the following message: ------------- Atari Transputer Workstation for sale Ram Meenakshisundaram cctech(a)classiccmp.org Tue Jul 1 08:54:30 2003 * Previous message: New here... Looking for PDP 11 / RSTS help * Next message: Atari Transputer Workstation for sale * Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] Hi, I know a source for a complete ATW800 in the UK area if anyone is interested. They are asking 250 UKP for it (Cambridge area). Let me know, condition is untested. I wish I could go for it, but since I am across the pond, it is just too costly :-( Cheers, Ram -------------- do you know if this computer is still available for sale? thanks. michael

20 years, 4 months

Old Nixdorf printer

by Martin.Kukac＠seznam.cz

Hi everybody. Today I got "classic" printer made by Nixdorf company. It's old matrix printer, made before 1990 (because of Made in W. Germany sign and since 1990 there is no W. Germany). It seems to be serial printer (it has about 20m long cable, i think no paralel interface can operate such long distances), but it has non-standard DIN 6-pin connector (only 5pins present) market as SAS IN on the printer. I have no idea about type of the printer (there is only NIXDORF COMPUTERS label and then Nixdorf STAD ND45 on small label at the bottom). I'd like to connect it to standard PC. Does anyone have pin-out of this connector or does anyone know something about this printer ? thanks, Martin Kukac, Czech Republic ____________________________________________________________ ADSL za korunu od Contactelu - nejp??jemn?j?? ADSL na trhu doru??me rychle a? k V?m! http://ad2.seznam.cz/redir.cgi?instance=70017%26url=http://www.contactel.cz…

20 years, 4 months

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test-drb February 2004