January 2002 - test-drb@ccmp.vtda.org

by pete＠dunnington.u-net.com

On Jan 30, 15:36, Marvin Johnston wrote: > > What is the voltage, current, and style of the lamps used on the PDP-8 > series of computers? I recall seeing 14V, 28V lamps both mentioned, but > no current ratings. My PDP-8/E uses 12V or 14V bulbs, running off an 8V (nominal) supply. I'm sure I posted some of the details to the list not very long ago, when I was thinking about replacing the non-original LEDs with original bulbs. Other models may very well be different, though. -- Pete Peter Turnbull Network Manager University of York

23 years, 6 months

2
1
0 0

9 track tapes

by pete＠dunnington.u-net.com

On Jan 30, 18:19, Dave McGuire wrote: > On January 30, Matt London wrote: > > Quick question, I've got a Cipher F880 here (no tapes yet - anyone in > > the UK wanna help out? :&) and someone just asked me what the maximum > > capacity of the drive is.... > > The Cipher F880 is a 1600bpi drive, if memory serves. It might also > do 800bpi. Capacity depends on the block size...but on average, at > 1600bpi on a 2400' reel, you'll get about 40MB or so. That's what I thought, but I didn't want to be the first to reply because I'm not really sure. If it does support both 800bpi and 1600bpi, and you're in the UK not too far from York, I have an 800bpi tape which I can't read on my 1600bpi drive, and would like copied sometime. It's an original 7th Edition distribution tape from the UK distribution centre at HWU, and I've wanted to put it on the PUPS archive for a long time. Apart from the fact that it's probably the tape used for the machine sitting a few feet away frm me, which also came from HWU. -- Pete Peter Turnbull Network Manager University of York

23 years, 6 months

1
0
0 0

VT131 needs keyboard help

by csmith＠amdocs.com

> -----Original Message----- > From: Ethan Dicks [mailto:erd_6502@yahoo.com] > Keyboard error. It's _possible_ the keyboard error is in the VT131, > but not as likely as in the keyboard. If you have a VT100 or VT101, That was my thought... > VT105, etc., you could test that keyboard in another terminal; but if > you just have the VT131 as your sole example of DEC keyboards, that's > a bit of a problem. This is actually the only one I've ever met. I have seen pictures and layout diagrams, though, and it _looks_ (IE the keys are the same) like a VT100 keyboard. On the other hand, that other terminal _looked_ (The case, etc, was nearly identical) like a VT100... > If the label hasn't fallen off, ISTR that there was a paper sticker > with the Digital logo and some numbers on the bottom. Fallen off, or not there in the first place. :/ > It's possible, if you can't find a vendor description anywhere, that > you picked up a keyboard for another terminal. Lots of folks > used 1/4" > jacks for keyboards in those days, even Apple (on the Lisa). Yes, but again, it's not the jack that makes it look the same -- it really does look like (at least a carbon copy of) a VT100 keyboard. See my comment above about the other terminal, though. It certainly isn't a Lisa keyboard. I have both the working machine, and a not-so-working machine, each with the keyboard. Anyway, the apple markings would give it away... > If it's a DEC keyboard, it should be compatible. I am not aware of > any major changes in keyboards, save VT100 vs LK201 and the like > (different protocol, I presume; different appearance, > different connector, > etc.) Yep. :) That's what I thought, anyway... So I'm assuming for now the keyboard is bad, or incompatible. Perhaps I could modify it either way, given the schematics for the keyboard... > > Failing a way to positively identify the keyboard, are there any > > common modes of failure along these lines? > Dead chip in the keyboard, usually. We never fixed them when I used > VT100s on a daily basis. We threw them into a box in the > back room and > grabbed a different (working) one from stock. The fact that we were > shrinking on an annual basis meant that we never had to buy a terminal > again after we hit our peak in 1984. Do you know anything about the type/location on the board of this chip? > Off of a good terminal? I presume that you could find a VT100 from a > 3rd party vendor. Don't know what they sell for these days. Hmm.. VT100 keyboard schematics, anyone? :) I'd really like to make this into a console for my PDP-11. Regards, Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

23 years, 6 months

4
3
0 0

1520 plotter (was RE: Your VIC-20 is worth $300!!! W@W!)

by Lee.Davison＠merlincommunications.com

Where 'locally' is either a misprint for 'luckily', or it's the name of a small hamlet in Wales, not marked on any map. That would be Llocaly, it's near Cwmfishin. Lee. ---------------------------------------------------------------------------- ---- This email is intended only for the above named addressee(s). The information contained in this email may contain information which is confidential. The views expressed in this email are personal to the sender and do not in any way reflect the views of the company. If you have received this email and you are not a named addressee please delete it from your system and contact Merlin Communications International IT Department on +44 20 7344 5888. ________________________________________________________________________ This e-mail has been scanned for all viruses by Star Internet. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk ________________________________________________________________________

23 years, 6 months

1
0
0 0

Dec PDP-8 Lamps

by marvin＠rain.org

What is the voltage, current, and style of the lamps used on the PDP-8 series of computers? I recall seeing 14V, 28V lamps both mentioned, but no current ratings. In checking out Chicago Miniature (http://www.sli-lighting.com/cml/electronic/index.cfm), it looks like they have quite a few lamps that might fit the bill. http://www.sli-lighting.com/cml/databookpdf/2-47.pdf is the PDF file I was checking.

23 years, 6 months

1
0
0 0

AN/UYKs

by healyzh＠aracnet.com

> Isn't that the DoD designation for a PDP-8? We'll, I've seen Sperry-Rand, Harris, Unisys, and Honeywell systems with that designation. It all depends on the number after the AN/UYK- as to what it's the designation for. Zane

23 years, 6 months

1
0
0 0

Small UNIX boxes (was RE: Netscape (was Re: PayPal = payola?))

by ceby2＠csc.com

Toth -- I'm afraid the P70 keys are different. They apparently built a special keyboard just for this class of machine. I have a couple experiments in mind as far as my own junk keyboards are concerned, but I haven't had a chance to diagram out the mechanism so I can cross-breed something. The ideal situation is a key from a dead P70. But I'd just be happy not to keep slapping my finger into the empty socket everytime a rewrite a host file or something. Sighhhh. Thanks for thinking of me though. Colin Eby Senior Consultant CSC Consulting

23 years, 6 months

1
0
0 0

9 track tapes

by mcguire＠neurotica.com

On January 30, Matt London wrote: > Quick question, I've got a Cipher F880 here (no tapes yet - anyone in > the UK wanna help out? :&) and someone just asked me what the maximum > capacity of the drive is.... The Cipher F880 is a 1600bpi drive, if memory serves. It might also do 800bpi. Capacity depends on the block size...but on average, at 1600bpi on a 2400' reel, you'll get about 40MB or so. -Dave -- Dave McGuire St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf

23 years, 6 months

2
1
0 0

Here I Am

by vcf＠siconic.com

Not that anyone cares, but if you've been trying to contact me for the past 10 days and I have not responded, it is because: a) I was on vacation b) When I got back I discovered some little punk assed bitch had hacked into my server and it had to be taken off the local network where it sits for security reasons. I'm only now getting this stupid server reconfigured properly again. All I can say is for all my Linux evangelizing, it still as a LONG way to go towards ease of setup. I thought SuSE was going to make things much easier but I must say I had about as much trouble with SuSE as I did with my old Red Hat setup. Fooey on crappy Linux installs. Fooey on lame-o's who waste my time by stumbling their way into my server and causing me to lose precious time. Anyway, I hope this actually makes it out of here. And I hope whoever is trying to contact me will be able to get through successfully. It will still take me a day to work out bugs and get back to anyone who's e-mailed me, so I appreciate your patience. Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

23 years, 6 months

15
19
0 0

9 track tapes

by classiccmp＠knm.yi.org

Hey ho people :&) Quick question, I've got a Cipher F880 here (no tapes yet - anyone in the UK wanna help out? :&) and someone just asked me what the maximum capacity of the drive is.... Anyone care to enlighten me? -- Matt --- Web Page: http://knm.org.uk/ http://pkl.net/~matt/

23 years, 6 months

1
0
0 0

Have you guys seen this?

by witchy＠binarydinosaurs.co.uk

http://cgi.ebay.co.uk/aw-cgi/eBayISAPI.dll?ViewItem&item=1326762437 It's an Altair 8800b.....lovely.... -- witchy/adrian www.binarydinosaurs.co.uk - the online computer museum www.snakebiteandblack.co.uk - monthly gothic shenanigans Linux Powered!

23 years, 6 months

1
0
0 0

HP 9000 800/G40 battery?/cable

by csmith＠amdocs.com

> -----Original Message----- > From: Tothwolf [mailto:tothwolf@concentric.net] > What's the age of this machine? Most rechargeable battery > technologies are > only good for 5-10 years, and after that they start to leak and damage > surrounding metals. If this system uses NiCads or Sealed Lead Acid > batteries, they should be replaced right away. If it uses > Cyclon Sealed > Lead Acid batteries, those are usually good for about 15 > years, but after > about 10, they really should be replaced anyway. Not sure, but I'll check them. Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

23 years, 6 months

1
0
0 0

Docs for QBus cards wanted

by mcguire＠neurotica.com

On January 30, Jochen Kunz wrote: > > > M7616 KXJ11-CA J11 CPU, 512-Kbyte RAM, > 64-Kbyte PROM > > > This is a PDP 11 on a QBus slave card, used as universal intelligent > > > peripheral controller. (Wouldn't it be nice to have a PDP 11 > > > co-processor runing some 2.xBSD in a VAX? ;-) ) > > Oh I would seriously *dig* this. :-) It would be great to be able > > to squirt arbitrary code into that card from a userland process. 8-) > My thaught, my thaught. But as I have no clue how this card can be > interfaced, I can't say that this will be possible. Doc for this beast > seams to be really hard to get. That sucks. It would be a really cool thing to be able to do. Maybe someone within DEC can anonymously slide some info your way. Hey, I can hope. :-) -Dave -- Dave McGuire St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf

23 years, 6 months

1
0
0 0

Eyepiece Video Camera Spam

by marvin＠rain.org

I just received the following regarding the spam sent to the listserver: Thank you for contacting the Roving Software Abuse group. All complaints that we receive are reviewed and we will take appropriate action against the user who sent this email. Depending on the results of our investigation, the user's account may be terminated immediately. Regardless, we have removed your name from the list in question. If you ever receive unwanted email from this source again please contact us immediately.

23 years, 6 months

1
0
0 0

Docs for QBus cards wanted

by mcguire＠neurotica.com

On January 30, Jochen Kunz wrote: > I am currently working on a NetBSD driver for the RX01/02 floppy disk > drive. (As an example for a device driver writing HOWTO.) To continue my > kernel hacking when this is finished, I am looking for docs for the > folowing cards: > > M7616 KXJ11-CA J11 CPU, 512-Kbyte RAM, 64-Kbyte > PROM > This is a PDP 11 on a QBus slave card, used as universal intelligent > peripheral controller. (Wouldn't it be nice to have a PDP 11 > co-processor runing some 2.xBSD in a VAX? ;-) ) Oh I would seriously *dig* this. :-) It would be great to be able to squirt arbitrary code into that card from a userland process. 8-) -Dave -- Dave McGuire St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf

23 years, 6 months

3
2
0 0

FW: [ABUSE] [SpamCop (http://www.constantcontact.com/index.jsp?cc=tsanp) id:56920961] New Microscope Eyepiece Video Camera [roving] [#19815]

by abuse＠roving.com

Thank you for contacting the Roving Software Abuse group. All complaints that we receive are reviewed and we will take appropriate action against the user who sent this email. Depending on the results of our investigation, the user's account may be terminated immediately. Regardless, we have removed your name from the list in question. If you ever receive unwanted email from this source again please contact us immediately. -----Original Message----- From: noc(a)internap.com [mailto:noc@internap.com] Sent: Thursday, January 24, 2002 9:35 AM To: Roving Notification Report Subject: [ABUSE] [SpamCop (http://www.constantcontact.com/index.jsp?cc=tsanp) id:56920961] New Microscope Eyepiece Video Camera [roving] Internap has received an abuse complaint related to the possible distribution of unsolicited e-mail (spam) or a possible security violation >from you or one of your customers. We are forwarding the complaint to you so that you may take appropriate measures to address the issue. The purpose of this message is to inform you of a complaint we have received as if you had received the complaint directly. We have not verified the accuracy of the complaint nor is this an accusation that the said incident has occurred. Internap will not embark upon any punitive action regarding spam or security complaints without explicitly and formally contacting you regarding a clear, verified complaint, or a pattern of abuse. Please refer to http://www.internap.com/about/policies.html for general questions regarding Internap's stance on spam or abuse. Please direct any questions regarding this specific issue to abuse(a)internap.com. ---------- Forwarded message ---------- From: "Michael Passer" <postmaster(a)reports.spamcop.net> To: abuse(a)internap.com Subject: [SpamCop (http://www.constantcontact.com/index.jsp?cc=tsanp) id:56920961] New Microscope Eyepiece Video Camera Date: Wed, 23 Jan 2002 10:59:58 -0600 (CST) (envelope-fr * SpamCop V1.3.3 - This message is brief for your comfort. Please follow links for details. http://spamcop.net/w3m?i=z56920961z0a1f1d7543ac09fce7700fef7b584caez Spamvertised website: http://www.constantcontact.com/index.jsp?cc=tsanp > http://www.constantcontact.com/index.jsp?cc=tsanp is 63.251.135.71; Wed, 23 Jan 2002 17:54:59 GMT Offending message: Microsoft Mail Internet Headers Version 2.0 Received: from kc-msxalone.kc.umkc.edu ([134.193.143.157]) by KC-MAIL2.kc.umkc.edu with Microsoft SMTPSVC(5.0.2195.3779); Wed, 23 Jan 2002 11:36:08 -0600 Received: from ns2.ezwind.net ([209.145.140.11]) by kc-msxalone.kc.umkc.edu with Microsoft SMTPSVC(5.0.2195.3779); Wed, 23 Jan 2002 11:36:08 -0600 Received: (from majordom@localhost) by ns2.ezwind.net (8.11.6/8.11.6) id g0NGxxB98461 for classiccmp-classiccmp-org-outgoing; Wed, 23 Jan 2002 10:59:59 -0600 (CST) (envelope-from owner-x) X-Authentication-Warning: ns2.ezwind.net: majordom set sender to owner-x using -f Received: from mailface.roving.com (mailface.roving.com [63.251.135.75]) by ns2.ezwind.net (8.11.6/8.11.6) with ESMTP id g0NGxwm98456 for <x>; Wed, 23 Jan 2002 10:59:58 -0600 (CST) (envelope-from ESC1010944242767_1000879232570(a)in.roving.com) Received: from lp1 (lp1.roving.com [10.20.40.148]) by mailface.roving.com (Postfix) with ESMTP id 609271BEAA for <x>; Wed, 23 Jan 2002 11:33:55 -0500 (EST) Message-ID: <-303871085.1011805192585.JavaMail.administrator@lp1> From: "Michael Passer" <postmaster(a)reports.spamcop.net> To: x Subject: New Microscope Eyepiece Video Camera Mime-Version: 1.0 X-Roving-Queued: 20020123 11:59.52554 X-Mailer: Roving Constant Contact 4.1.Patch75.Patch_75_Delights_01_11_02 (http://www.constantcontact.com) X-Roving-ID: 1010944242767 X-Return-Path-Hint: ESC1010944242767_1000879232570(a)in.roving.com Date: Wed, 23 Jan 2002 11:33:55 -0500 (EST) Sender: owner-x Precedence: bulk Reply-To: x Return-Path: owner-x X-OriginalArrivalTime: 23 Jan 2002 17:36:08.0602 (UTC) FILETIME=[711C4FA0:01C1A434] Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 7bit HYPERLINK "http://ccprod.roving.com/roving/sa/o.jsp?id=tnjhjce6.ntmspqn6&o=http:// ccprod.roving.com/roving/images/p1x1.gif" HYPERLINK "http://ccprod.roving.com/roving/images/letters/spacer.gif". Tottleben Scientific Company, Inc. HYPERLINK "http://ccprod.roving.com/roving/images/letters/spacer.gif". Dear Microscopist: Every once in awhile a new product comes along in the world of microscopy that is truly worthy of 'sounding the horn'. We believe this is one of those times so......here it is.... our new "Eyepiece Video Camera"! It is the very first video camera designed especially to be used on your microscope's binocular. How about that? Now, among us microscope nerds that IS exciting news. About the size of a microscope eyepiece, this ingenious analog camera is easily put into use by removing an eyepiece from your microscope and replacing it with the camera. It is truly as easy as that. It is no longer an absolute must for you to have a "trinocular" microscope to perform video microscopy so this camera will work on any monocular, binocular, or even a trinocular microscope. Now you can see your microscopic images on any tv or, capture and store images on any computer with an additional capture board (a must for emailing images). HYPERLINK "http://ccprod.roving.com/roving/images/letters/spacer.gif". HYPERLINK "http://ccprod.roving.com/roving/sa/t.jsp?id=tnjhjce6.ntmspqn6&p=http%3A %2F%2Fwww.tscmicroscopes.com" HYPERLINK "http://ccprod.roving.com/roving/images/letters/spacer.gif". Eyepiece Video Camera How much would a camera that offers this much convenience and capability cost you are undoubtedly asking? And the answer is.....only $245 plus s/h/ins. If you plan on capturing images to your computer you will need a video capture board. We have one available with software for $99.50. (You might want to check your computer to see if you already have one because many of the new computers sold today already have them installed.) Both items can be ordered on-line right on our site or by calling our office. HYPERLINK "http://ccprod.roving.com/roving/sa/t.jsp?id=tnjhjce6.ntmspqn6&p=http%3A %2F%2Fwww.tscmicroscopes.com"Eyepiece Video Camera HYPERLINK "http://ccprod.roving.com/roving/images/letters/spacer.gif". Name Brand Used Microscopes In addition we have an abundance of name brand used microscopes like Zeiss, Leitz, Leica, Olympus, and Nikon. We also have used objectives, eyepieces, cameras, and many other microscope accessories for many name brand scopes so please email us or call our office for that 'hard to find' item - we just might have what you have been looking for! HYPERLINK "http://ccprod.roving.com/roving/sa/t.jsp?id=tnjhjce6.ntmspqn6&p=http%3A %2F%2Fwww.tscmicroscopes.com"Learn more HYPERLINK "http://ccprod.roving.com/roving/images/letters/spacer.gif". HYPERLINK "http://ccprod.roving.com/roving/sa/t.jsp?id=tnjhjce6.ntmspqn6&p=http%3A %2F%2Fwww.tscmicroscopes.com" HYPERLINK "http://ccprod.roving.com/roving/images/letters/spacer.gif". Please take a few moments to visit our site for more information and to register for our Free Microscope Drawing (no purchase required) and to receive information on our latest and greatest products like name brand 'used microscopes'. We are committed to providing you the latest products available for online purchase, and as always, outstanding personal service. If you have any questions about our new product offering, please do not hesitate to contact us. Sincerely, Tom Tottleben Tottleben Scientific Company, Inc. _____ email: HYPERLINK "mailto:tomtot@charter.net"tomtot(a)charter.net voice: 618 656 9008/fax 618 656 9599 web: HYPERLINK "http://ccprod.roving.com/roving/sa/t.jsp?id=tnjhjce6.ntmspqn6&p=http%3A %2F%2Fwww.tscmicroscopes.com"http://www.tscmicroscopes.com HYPERLINK "http://ccprod.roving.com/roving/images/letters/spacer.gif". This email was sent to x, at your request, by HYPERLINK "http://ccprod.roving.com/roving/sa/s.jsp?id=tnjhjce6.ntmspqn6"Tottleben Scientific Company. Visit our Subscription Center to HYPERLINK "http://ccprod.roving.com/roving/d.jsp?p=oo&m=tnjhjce6&ea=classiccmp@cla ssiccmp.org&id=tnjhjce6.ntmspqn6"edit your interests or HYPERLINK "http://ccprod.roving.com/roving/d.jsp?p=oo&m=tnjhjce6&ea=classiccmp@cla ssiccmp.org&id=tnjhjce6.ntmspqn6"unsubscribe. View our HYPERLINK "http://ccprod.roving.com/roving/CCPrivacyPolicy.jsp"privacy policy. Powered by HYPERLINK "http://www.constantcontact.com/index.jsp?cc=tsanp" \nConstant Contact

23 years, 6 months

1
0
0 0

Recent finds at the surplus shop

by jss＠subatomix.com

I bought a few things from the local university's surplus shop today. First, I needed a printer, my ink-guzzler having recently become unavailable. I found a LaserJet II, which should work nicely for what I need to do. It's also on-topic and looks it (in a good way). I'm guessing I'll want to get a 4MB memory module and a Postscript module for it. That stuff looks to be decently available on eBay. Cost: $25. I also picked up a microfiche viewer, as I have some manuals on fiche cards that I'd like to see. Cost: $10. I hope these things actually work... -- Jeffrey S. Sharp jss(a)subatomix.com

23 years, 6 months

4
5
0 0

Small UNIX boxes (was RE: Netscape (was Re: PayPal = payola?))

by ceby2＠csc.com

I've got a few mini-Linux machines. The smallest is an NEC Versa UltraLite, with the runner up being IBM P70. Which reminds me -- anyone have a parts machine. Mine's missing the critical left shift key. Detracts from the joy of Vi on an amber screen. :^>~ -- Colin Eby Senior Consultant CSC Consulting On Wed, 30 Jan 2002, Tothwolf wrote: > I've got a Contura Aero myself, tho slightly upgraded since it was bought > from Compaq. Mine currently has 20MB of ram and 4GB of hard drive. It > originally came with 4MB of ram and 80MB of hard drive. You would not > believe the pain and suffering that was involved in getting a non-dos os > installed on the thing. Yes, I would. I've installed NetBSD on an IBM PS/1. Peace... Sridhar > If someone has a Contura Aero 4/33C or parts for the Contura Aero line > they want to get rid of sometime, send me an email. I've always wanted to > add a 4/33C to my collection of unusual systems. > > -Toth > >

23 years, 6 months

2
1
0 0

A Special Announcement From Dish Network ...

by brian＠quarterbyte.com

The way to deal with idiots like this is to call his boss and complain. I just did. Good use of 15 cents. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- _| _| _| Brian Knittel / Quarterbyte Systems, Inc. _| _| _| Tel: 1-510-559-7930 Fax: 1-510-525-6889 _| _| _| Email: brian(a)quarterbyte.com _| _| _| http://www.quarterbyte.com

23 years, 6 months

3
2
0 0

DesqView

by mcguire＠neurotica.com

On January 30, Gareth Knight wrote: > > I wanted to grab this, but the web server mentioned in the article > > is refusing connections on port 80. Anybody know what's going on, or > > did anyone manage to grab it? > > Try http://www.chsoft.com/dv.html Ahh, there it is. Thanks! :-) -Dave -- Dave McGuire St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf

23 years, 6 months

1
0
0 0

Searching for old DEC 12V frontpanel bulbs

by pete＠dunnington.u-net.com

On Jan 29, 6:22, Ethan Dicks wrote: > > Sounds like a standard T1_1/2 (about 3/16" diameter) or T1_3/4 (about > > 1/4" diameter) wire-ended bulb. There are still a few companies that > > make them. > > If I had to guess, I'd go with the 1/4" diameter. These are larger > than PDP-8/L or RL01/RL02 bulbs. The bulbs in RL02s aren't "wire-ended", they're 14 volt T1_1/2 "wedge base" bulbs. Wedge base bulbs are common in motor vehicles. Unfortunately 14V is hard to get (except in T1_3/4 size), but I used 12V ones in my RL02s -- they're just a bit brighter. Farnell part no 328-960, made by SLI (for whom someone posted a URL). I got some low-current 12V ones made by VCH as well. > > > If DEC was underfeeding these bulbs to extend their life, I would > > > expect that the bulb should be rated at 14V-16V. > > > The Farnell catalogue lists a few that are 14V. The correct bulbs for my > > RL02 drives are 14V, fed from a 12V supply, as you say. > > >From a conversation with Jeff Russ, a PDP collector from Indiana, it > seems that the bulbs are 28V, underfed to 12V-14V. He found some > similar bulbs at a hamefest once, but they drew double the current > of the originals. Dunno about bulbs for a PDP-8 but spare RL01/2 bulbs I got from DEC are definitely 14V. -- Pete Peter Turnbull Network Manager University of York

23 years, 6 months

2
1
0 0

Packrat genome project questions

by r.stek＠snet.net

The first computer I used was in '65 - I took a summer course at Stevens Tech and learned FORTRAN on an IBM 1620; I think it was a 7090 which they had also, but only the real geeks could use it, and I wasn't among them. Then in '66 I learned (a little) of 1401 AutoCoder. The freshman year at RPI it was the 360 model 50 - still with punched cards. At the risk of starting a definitions war, I got a TI SR-52 for statistics and games (still have it). Shortly thereafter I put together my Sol-20 (2 weeks of soldering everynight after dinner, and 6 weeks to find the two reversed diodes which prevented it from working)- still have it. I had a RS Model I very briefly - don't have it. Then it was on to a North Star Horizon - still have it, a Morrow Decision 1 (sold it but I found a replacement), and then a PC XT clone and descendents - the only ones in this lineage I still find "cool" are my HP 200LX and Poqet. Of course I used many other - Cromemco, various Rat Shacks, Osborne 1, KayPro, Apple II, Sinclair, PETs, VICs, C-64's, Atari 400-800, TI, Adam, etc. I have since added to my collection an IMSAI, CompuPro, and Ithaca InterSystem, a Lisa 2/5, plus some smaller systems like Ohio Scientific Challenger, Apple II+, Epson PX, KayPro 10, Osborne Executive, Sinclair kit, Mac 512, Color Classic, et al. Sometime in the next xx years I will finish putting together my Mark-8 repro with a TV typewriter. And I know it was a lousy machine, but since I ALMOST bought one instead of my Sol, I'd still like an Altair 8800 (but I don't see many around in my price range lately <g>). Steve Ciarcia has suggested that someday he MIGHT make me a present of his Digital Group, but I really lust after his Scelbi (and he's smart enough not to leave it to me in his will - how tempted I might be... <g>) Bob Stek Saver of Lost Sols

23 years, 6 months

1
0
0 0

New line of VAX 6000s!

by vaxzilla＠jarai.org

Wow, the design of this baby is even more revolutionary than Apple's new iMac-- http://www.vax.co.uk/ My guess is the black hose coming out of the side is used to circulate some sort of coolant to the process from overheating. -brian.

23 years, 6 months

5
5
0 0

New line of VAX 6000s!

by pete＠dunnington.u-net.com

No, it's for the holes... On Jan 30, 9:42, Ben Franchuk wrote: > Nope you have it all WRONG, it is the Bit Bucket option > for all the loose 0's and 1's found when a program crashes. > They can be rather hard on the carpet, generate static electricty > and slow programs down to a crawl. Paraphrasing slightly from Matthew Skala on alt.folklore.computers: All perfectly correct, except you forgot to mention: In modern implementations, data sent to the bit bucket are destroyed by combining the binary 1s and 0s in the Neuman reaction [1], (eqn. 1) 1#0 -> 2p where # is the logical annihilation operator, and p is Plonk's Constant, 0.172 J [2]. The resulting heat is fed back to the power supply and used to replace the voltages of the destroyed bits. Unfortunately, this reaction requires equal amounts of 1 and 0 bits. Modern PCs, especially those used in desktop publishing by unskilled personnel, often generate an excess of 0 bits corresponding, for example, to whitespace in printed documents. These unwanted zeros can accumulate into plaques on the system bus, causing a reduction in bus rate and eventual total catastrophic system seizure [3]. Current techniques involve breaking the zero and unrolling it into a one. See Figure 1, below. | _ __ \ | / \ \ \ | | | ---> | ---> | ---> | \_/ __/ / | / | | Figure 1. Unrolling a zero. (15000x electron micrographs courtesy Pugwash Memorial Hospital Research Department) This 1 can be annihilated with another extra 0 by equation 1, leaving to be disposed only the hole from the middle of the unrolled 0. Holes are accumulated in a special Hole Accumulation Hemisphere (HAH) at the bottom of the power supply filter capacitors, until they can be removed by a qualified service technician. Used holes are currently being re-refined, cast in larger units, and sold to the doughnut industry [4]. It is important that beginning users not attempt to empty their own HAHs. The accumulated holes, in addition to being invisible, are an environmental hazard and should not be placed in the normal office waste stream. There have been cases of holes getting into important documents [5], or merging to form chunks large enough for personnel to fall in [6]. Uncontrolled holes are a very real danger and must be taken seriously, especially in critical government and medical applications [7]. References [1] Neuman, A.E. Safe, secure destruction of data. Journal of Data Erasure Technologies. 5:17, 23-69. [2] Plonk, Anvilsko. Heat value of data: a retrospective. Home Heating News. 65, 19. [3] Kevorkian, J. Case studies in busclerotic CPU arrest. Journal of Systems Rescusitation. 2:12, 143-145. [4] Dibbler, C.M.O.T. An alternative to traditional hole suppliers. Baking Quarterly. 1996:3, 7-17. [5] Kaputnik, H. I ha no l ers nd must sc . Writer's Weekly. 28:42, 94-98. [6] Eating Corporation of America. Unpublished memo, subject: "Where the f--- is Waldo?" [7] Rubble, B. The 18 1/2 minute gap: Another view. -- Pete Peter Turnbull Network Manager University of York

23 years, 6 months

2
1
0 0

Sharp CE-515P - need more pens! (also: Multitech MPF)

by philpem＠btinternet.com

On Tue, 29 Jan 2002 at 21:19:35 -0500, Joe <rigdonj(a)cfl.rr.com> wrote: > At 10:03 PM 1/29/02 -0000, you wrote: > >Hi, > > A few of you might remember my Sharp CE-515P plotter. Well, my pens are > >almost completely devoid of ink and I need more. I know All Electronics sell > >a pack of 4x black pens, but I'm after the four coloured ones (blue, green, > >red and black). I'd really like to keep this thing running, but if I can't > >get the pens then I'm afraid I'm going to have to relegate it to the > >cupboard... > > I bought both black and colored pens a few years ago. I THINK I got them > from Goldmine Electronics. You should check with them. Besides their prices > are a lot better than All's. The same Goldmine Electronics whose website is located at www.goldmine-elec.com ? Hmm... I've just had a look in the "Computer Parts" section and there's no sign of any plotter pens... If Goldmine do sell them, can someone PLEASE tell me what catalogue page they're on? Thanks. -- Phil. philpem(a)bigfoot.com http://www.philpem.btinternet.co.uk/

23 years, 6 months

1
0
0 0

Amstrad 1512DD - For Sale

by lyn40＠bigfoot.com

We have a Amstrad 1512dd, monitor, keyboard, mouse, dmp3000 printer with loads of paper, dust covers plus original Gem software & about 40 5.25" discs. System used approx 10 hours since purchased new in 1987. Mint Condition and perfect working order. All offers considered. L.Suffolk --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.314 / Virus Database: 175 - Release Date: 11/01/02

23 years, 6 months

1
0
0 0

More HP1000's, and bootstrapping old systems in general.

by steven_j_robertson＠hotmail.com

Did a little research and found the FST description at: http://www.hp.com/products1/rte/tech_support/documentation/documentation1/9… Not sure if I'll have time to tackle this or not. If anyone else decides to write an application to decode the data, I'd be interested in the results. See ya, SteveRob >From: "Bill McDermith" <bill_mcdermith(a)yahoo.com> >Reply-To: classiccmp(a)classiccmp.org >To: <classiccmp(a)classiccmp.org> >Subject: Re: More HP1000's, and bootstrapping old systems in general. >Date: Fri, 18 Jan 2002 10:39:08 -0700 > >The manuals are available from HP, and I believe that the format for these >files are in the back of the backup manual... I'm not sure if the manuals >are on the interex site, but if you go into the RTE section of hp support, >you can download them there... > >Bill >----- Original Message ----- >From: "Bob Shannon" <bshannon(a)tiac.net> >To: <classiccmp(a)classiccmp.org> >Sent: Thursday, January 17, 2002 5:38 PM >Subject: Re: More HP1000's, and bootstrapping old systems in general. > > > > Hmmm, does anyone on interex understand this format? > > > > Bill McDermith wrote: > > > > > >From the hp users group, interex, you can get the RTE-6 OS, but only > > > in fst format, which is some sort of tape dump/backup format that I > > > cannot (yet) decode, so I'm not sure how to build a loadable system... > > > The manuals are also available... If anyone knows how to decode >...snip...snip...snip... > > >_________________________________________________________ >Do You Yahoo!? >Get your free @yahoo.com address at http://mail.yahoo.com > _________________________________________________________________ Join the world’s largest e-mail service with MSN Hotmail. http://www.hotmail.com

23 years, 6 months

1
0
0 0

DesqView

by csmith＠amdocs.com

> -----Original Message----- > From: Cini, Richard [mailto:RCini@congressfinancial.com] > Right site but clicking all download links produce "page not > found" errors > here. Ok, this one seems like it might work: http://www.chsoft.com/dv.html Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

23 years, 6 months

1
0
0 0

New line of VAX 6000s!

by Robert_Feldman＠jdedwards.com

I've allways liked the tag line quoting Ernst Jan Plugge: "The day Microsoft makes something that doesn't suck is probably the day they start making vacuum cleaners." Bob -----Original Message----- From: Ethan Dicks [mailto:erd_6502@yahoo.com] Sent: Wednesday, January 30, 2002 9:57 AM To: classiccmp(a)classiccmp.org Subject: Re: New line of VAX 6000s! --- Brian Chase <vaxzilla(a)jarai.org> wrote: > Wow, the design of this baby is even more revolutionary than Apple's new > iMac-- http://www.vax.co.uk/ My guess is the black hose coming out of > the side is used to circulate some sort of coolant to the process from > overheating. Wow! A 6130! They fit three processors in that little enclosure... must not be XMI ;-) (Yes... I've heard of the VAX company in England... the joke going around over a decade ago was "Nothing sucks like a VAX"). -ethan __________________________________________________ Do You Yahoo!? Great stuff seeking new owners in Yahoo! Auctions! http://auctions.yahoo.com

23 years, 6 months

1
0
0 0

1520 plotter (was RE: Your VIC-20 is worth $300!!! W@W!)

by Adrian.Graham＠corporatemicrosystems.com

> -----Original Message----- > From: Ethan Dicks [mailto:erd_6502@yahoo.com] > Sent: 29 January 2002 14:15 > To: classiccmp(a)classiccmp.org > Subject: 1520 plotter (was RE: Your VIC-20 is worth $300!!! W@W!) > > "tatty polys"? It sounds British, but I have no idea what it is. Someone else has already answered this, but from my point of view it means battered packaging. (or "ebay mint") > I've just been trying to locate replacement gears for my 1520 - So > far, my measurements have yielded the following... Which is why I started breaking this one for spares in the first place since the guy asking wanted a few spares from the printer. a

23 years, 6 months

1
0
0 0

1520 plotter (was RE: Your VIC-20 is worth $300!!! W@W!)

by Adrian.Graham＠corporatemicrosystems.com

> -----Original Message----- > From: Tothwolf [mailto:tothwolf@concentric.net] > Sent: 29 January 2002 15:51 > To: 'classiccmp(a)classiccmp.org' > Subject: 1520 plotter (was RE: Your VIC-20 is worth $300!!! W@W!) > > Not really, I'd need a 120V version. Do you happen to know > what the output > voltage(s) are? I haven't even looked at the power connector > on the 1520 I > have. I'm guessing it uses a Din or coaxial power connector > like most of > the Commodore or Atari gear had. Having seen Tony's reply about a built-in PSU I'm not sure about both of mine now! One I've got easy access to but the other broken one is in storage.... I'll have to check now :) a

23 years, 6 months

1
0
0 0

A Special Announcement From Dish Network and the Armor Securi ty Corporation

by Adrian.Graham＠corporatemicrosystems.com

> -----Original Message----- > From: Gene Buckle [mailto:geneb@deltasoft.com] > Sent: 30 January 2002 16:14 > To: classiccmp(a)classiccmp.org > Subject: Re: A Special Announcement From Dish Network and the Armor > Security Corporation > > > Did this joker susbscribe to the list, spam it and then un-sub? > Not sure - I got it in my works mailbox today and this address doesn't get used for anything outside work apart from this list. > Which in turn will verify that your address is indeed valid and your > incoming spam rate will rise by at least 2 orders of > magnitude after they > sell your address to a few thousand more spammers. That's why I never reply to 'em :) a

23 years, 6 months

1
0
0 0

PKZIP problem

by LFessen106＠aol.com

In a message dated 1/30/02 10:51:23 AM Eastern Standard Time, rigdonj(a)cfl.rr.com writes: > . > > Well I've been trying to get either one to work for the last hour and I > haven't had any luck. -$a: ties to create a .ZIP file by the name of -&sa: > but that's illegal so it errors out. -rp, -rP, -Pr and -pr all do that > same thing. It copies all the files including those in the subdirectories > but when you use PKUNZIP all the files are placed in one directory > therefore losing the directory structure and overwritng any files that have > same names but that came from different subdirectories. I've tried this > with MS DOS PKZIP verion 2.04g and with Winzip but I got the same results > with both. > > Any ideas about what's wrong? > > You are doing fine... From DOS you can do a: pkzip -rp zipname to recoursively zip all your files and then unzip them into their correct directory structure by doing a: pkunzip -d zipname Just tried it an it works great and even keeps empty directories for ya. I am using pkzip/unzip for DOS version 2.04g... -Linc. In The Beginning there was nothing, which exploded - Yeah right... Calculating in binary code is as easy as 01,10,11.

23 years, 6 months

1
0
0 0

PKZIP problem

by csmith＠amdocs.com

> -----Original Message----- > From: Joe [mailto:rigdonj@cfl.rr.com] > Well I've been trying to get either one to work for the > last hour and I > haven't had any luck. -$a: ties to create a .ZIP file by the > name of -&sa: > but that's illegal so it errors out. -rp, -rP, -Pr and -pr > all do that > same thing. It copies all the files including those in the > subdirectories > but when you use PKUNZIP all the files are placed in one directory > therefore losing the directory structure and overwritng any > files that have > same names but that came from different subdirectories. I've You did use pkunzip with the option (yes, it's optional) to make it restore the directory tree, right? :) I think it's -d Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

23 years, 6 months

1
0
0 0

PKZIP problem

by fmc＠reanimators.org

Joe <rigdonj(a)cfl.rr.com> wrote: > same thing. It copies all the files including those in the subdirectories > but when you use PKUNZIP all the files are placed in one directory > therefore losing the directory structure and overwritng any files that have PKUNZIP -d ^^ this is important -Frank McConnell

23 years, 6 months

1
0
0 0

a VAX 11/780 in my garage ...

by mcguire＠neurotica.com

On January 29, Andreas Freiherr wrote: > This is just about right for a PDP-11/34A, a PDP-11/23, and a > Micro-PDP-11/23PLUS and their peripherals, such as LA36 and LA120 > printing terminals, and two-and-a-half 19" racks of diskette (8", of > course, what'd you think? ;^), disk, and tape drives. Not much left to > feed a MicroVAX, however - sigh... Pictures! Pictures!! -Dave -- Dave McGuire St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf

23 years, 6 months

3
2
0 0

DesqView

by RCini＠congressfinancial.com

Right site but clicking all download links produce "page not found" errors here. Rich -----Original Message----- From: Christopher Smith [mailto:csmith@amdocs.com] Sent: Wednesday, January 30, 2002 10:15 AM To: 'classiccmp(a)classiccmp.org' Subject: RE: DesqView > -----Original Message----- > From: Zane H. Healy [mailto:healyzh@aracnet.com] > Has anyone been able to access the site they claimed had it > for download? > I've wanted a copy of this since it came out! Does Symantec > have their own > download site? Try this: http://www.clarkson.edu/~vryhofab/wserv/freedv/ Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

23 years, 6 months

1
0
0 0

DesqView

by csmith＠amdocs.com

> -----Original Message----- > From: Zane H. Healy [mailto:healyzh@aracnet.com] > Has anyone been able to access the site they claimed had it > for download? > I've wanted a copy of this since it came out! Does Symantec > have their own > download site? Try this: http://www.clarkson.edu/~vryhofab/wserv/freedv/ Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

23 years, 6 months

1
0
0 0

FA: George A. Philbrick tube type Op-Amp

by rigdonj＠cfl.rr.com

1965 vintage tube type Op-Amp for "analog computors" See <http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1329047917>

23 years, 6 months

1
0
0 0

Netscape (was Re: PayPal = payola?)

by Robert_Feldman＠jdedwards.com

Since the 95LX uses MS-DOS 3.22, it is limited to a flash disk of at most 32MB, so you would need to try either the 8MB, 20MB or 30MB packages. I haven't tried any of them, so I don't know if they will work with the 95LX's screen either. The 95LX requires drivers to use flash cards. I can send you ones for SunDisk (SanDisk) cards if you need them. Bob -----Original Message----- From: Cameron Kaiser [mailto:spectre@stockholm.ptloma.edu] Sent: Tuesday, January 29, 2002 7:36 PM To: classiccmp(a)classiccmp.org Subject: Re: Netscape (was Re: PayPal = payola?) > Nah, you can put Minix on an HP LX palmtop, which is smaller and lighter > than a Poqet (see http://www.technoir.nu/hplx/minix.html). Any hope of this coming out for the 95LX? -- ----------------------------- personal page: http://www.armory.com/~spectre/ -- Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu -- Mistakes are often the stepping stones to catastrophic failure. ------------

23 years, 6 months

1
0
0 0

Remove

by fauradon＠frontiernet.net

----- Original Message ----- From: "Jonathan Willis" <prodinfo(a)armoralarms.com> To: <martys(a)sunday-blues.com> Sent: Tuesday, January 29, 2002 11:10 PM Subject: A Special Announcement From Dish Network and the Armor Security Corporation > Armor Alarms Promotion > > Click To Order > > This message is sent in compliance with the new email bill section 301. Under Bill S.1618 TITLE III passed by the 105th US Congress, this message cannot be considered SPAM as long as we include the way to be removed, Paragraph (a)(c) of S.1618, further transmissions to you by the sender of this email may be stopped at no cost to you by sending a Reply email with the words "Remove" written in the Subject line. > >

23 years, 6 months

1
0
0 0

DesqView

by mcguire＠neurotica.com

On January 29, Gareth Knight wrote: > No wonder has mentioned this, so I thought I would throw it into the Classic > mixer: > > http://slashdot.org/articles/02/01/27/1950244.shtml > Quote: > "It seems Symantec (purchasers of former company Quarterdeck) has release > DeskView/X into public domain and can be downloaded now. DesqView/X was a ... I wanted to grab this, but the web server mentioned in the article is refusing connections on port 80. Anybody know what's going on, or did anyone manage to grab it? -Dave -- Dave McGuire St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf

23 years, 6 months

2
1
0 0

No subject

by ismith＠quickvoice.co.za

Looking for interface to ide from JVC Hard Drive Model JD3824R00-1. Also looking for system setup files for Nixdorf 8810 M15 Iain Smith mailto:ismith@quickvoice.co.za

23 years, 6 months

1
0
0 0

DesqView

by Lee.Davison＠merlincommunications.com

> http://slashdot.org/articles/02/01/27/1950244.shtml ... I wanted to grab this, but the web server mentioned in the article is refusing connections on port 80. Anybody know what's going on, or did anyone manage to grab it? Scroll further down the article to the comments, there's an alternate link that seems to work. Lee. ---------------------------------------------------------------------------- ---- This email is intended only for the above named addressee(s). The information contained in this email may contain information which is confidential. The views expressed in this email are personal to the sender and do not in any way reflect the views of the company. If you have received this email and you are not a named addressee please delete it from your system and contact Merlin Communications International IT Department on +44 20 7344 5888. ________________________________________________________________________ This e-mail has been scanned for all viruses by Star Internet. The service is powered by MessageLabs. For more information on a proactive anti-virus service working around the clock, around the globe, visit: http://www.star.net.uk ________________________________________________________________________

23 years, 6 months

1
0
0 0

Not-so-OT point of philosophy

by spectre＠stockholm.ptloma.edu

I started internal medicine rotation at the Loma Linda VA Hospital today and noted that the entire place is crawling with WinTerms (by Wyse, no less), running WinCE, connected via Citrix to a Win2K Advanced Server host. There are only a few "real" PCs there -- in fact, I think the Macs might outnumber them. Before all of you cry off-topic, doesn't it seem odd to anyone we're now full circle and back to low-power terminals connected to a "mainframe," now that corporate America has gotten off its fat client kick? Compared to the WinTerms, my old Wyse terminal looks so nice. -- ----------------------------- personal page: http://www.armory.com/~spectre/ -- Cameron Kaiser, Point Loma Nazarene University * ckaiser(a)stockholm.ptloma.edu -- If your happiness depends on anyone else, you've got a problem. -- R. Bach -

23 years, 6 months

8
9
0 0

LEAST valuable collectibles (was: Apple II boards

by mcguire＠neurotica.com

On January 28, Tony Duell wrote: > > listeners - Transmission Aborted". I assume this means it can't > > directly address an arbitrary HPIB device, only something set to > > "listen only"? This is the only time I've used HPIB and had things > > I think you're right, > > The bad news is that there's no way to set the 82169 to work like this. > You might be able to configure it as a listener using another controller, > and then get the 'scope to send data to it (without it being unlistened), > but don't ask me how to do that. And that would require you to find > another HPIB controller. Ahh well. Thanks for the suggestions, though. The lucky thing is, I found my HPIB ThinkJet. I thought it was up in Maryland in storage, but it's actually here at my new place. So I'm happily printing IR LED drive waveforms for the guy up in Maryland who's working on the driver circuitry for my new work project but can't afford a real scope. :-) -Dave -- Dave McGuire St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf

23 years, 6 months

1
0
0 0

Sharp CE-515P - need more pens! (also: Multitech MPF)

by philpem＠btinternet.com

Hi, A few of you might remember my Sharp CE-515P plotter. Well, my pens are almost completely devoid of ink and I need more. I know All Electronics sell a pack of 4x black pens, but I'm after the four coloured ones (blue, green, red and black). I'd really like to keep this thing running, but if I can't get the pens then I'm afraid I'm going to have to relegate it to the cupboard... Alternatively, if someone wants to donate a working flatbed (preferably A3-size) plotter to my collection... BTW, anyone got a Monitor ROM dump, memory map, schematic diagram, etc for the Multitech MPF-IB or MPF-I (the one with the green starburst display)? I'd like to have a go at rebuilding one. Just for the hell of it :-) Later. -- Phil. philpem(a)bigfoot.com http://www.philpem.btinternet.co.uk/

23 years, 6 months

6
5
0 0

Searching for old DEC 12V frontpanel bulbs

by geoff＠pkworks.com

> >I'm restoring some pre-TTL DEC stuff (R and W series logic) and I need >a handful of front panel bulbs. Unlike the later bulbs with a plastic >base and strong wires to solder to the PCB or to plug into socket pins, >these are like a kernel of corn, with two fine wires coming out of the >glass envelope at a slight angle with no supports of any kind. > >Some of the bulbs have burned-out filiaments. Many of the ones I need >to replace have broken wires externally. I am going to attempt to >solder new wires to the stub, but I don't expect the attempt to be an >overwhelming success. I might try a harder solder so that when I put >them back in the frontpanel PCB, they won't give way when I put enough >heat on the other end to install them. > >About all I know about these bulbs is that they are fed a nominal 12VDC >from the W-series driver boards. The front panel itself is literally just >a PCB and a bunch of bulbs; no active circuits (unlike, say, the front >panel of a PDP-8/L). Testing should be easy - feed 12VDC at a few mA >to each set of fingers and check the bulbs, one by one. > >If DEC was underfeeding these bulbs to extend their life, I would expect >that the bulb should be rated at 14V-16V. I measured slightly over 12VDC >in circuit, but well within a 5% tolerance. > >I have checked the online manuals I could find, but no mention is made >of the nature of the bulbs for 1966/1967-era DEC equipment. Any ideas? > I relamped the PDP-9 I am resoring for the Rhode Island Computer Museum a little over a year ago, and what follows is my description of that process. Given the time frame of the PDP-9, I suspect you're looking at a similar situation. I bought my 1764 lamps off the shelf from Mouser (www.mouser.com): The PDP-9 lamp board on which I wasted so much time and solder today is, I'm sorry to say, a nasty bit of work - not DEC's finest hour. Consider, it's 60 (not 56 as I previously reported) type 1762 T-1 3/4 wire-terminated lamps soldered into a board with 60 driver transistors, an electrolytic cap and a handful of connectors. It's buried deep inside the front panel, accessible, and only with difficulty, by climbing into the main system rack. Type 1762 lamps are very interesting. They're roughly 3/16" in diameter by 3/8" long, domed at the top (where they show through a masonite light blocker panel to the laminated plastic front panel of the -9), and roughly conical at the bottom. The wire leads protrude TO THE SIDES about 1/16" up from the bottom, and the leads are bent down so that they can be soldered into the board. I've seen oddball lamps before, but these are about as outr? as little incandescent lamps get. The wires are hard-drawn (ie: very brittle) copper, and they appear to poke through the glass without much of a seal. Over time the copper has corroded at the glass interface (Lots of green and blue ambergris. 'Looks good on an old roof, but is very disconcerting to see in electronic circuitry.), and the lamps break loose if you even think about looking at them. Also, enough tungsten has boiled off the filaments over the years that the top domes of most of the lamps are greatly darkened. I didn't bother to use any of the old lamps (although I salvaged what I could for posterity), but replaced all 60 of 'em with type 1764 lamps. Type 1762 lamps are damned-near impossible to find anymore (and given their construction I'm not surprised one bit); type 1764s are identical electrically (28V, 40ma, 340mA max cold surge current, CF-2 filament structure, 4000 hrs), and are the same size mechanically, but the wire leads come out the bottom through a more-conventional, and far less fragile, frit seal. Also, the leads appear to be tinned Kovar. They're stiffer but more malleable than the copper leads, they appear to "wet" where they seal with the glass, and they're magnetic. They also solder quite well. I dunno where DEC got those 1762s from. Maybe Ken got a good deal on 'em or something, and any insight from old DECies would be helpful here, too. But they sure did suck. In any event, all 60 lamps were removed. All 120 contacts (staked eyelets, by the way, pressed into a single-sided non-plated-through-hole tinned glass-epoxy board roughly 3" wide by 18" long) were cleaned - in large part to remove the drek left on the board from previous re-lampings. (I found evidence for at least one, and probably two, re-lampings, as well as the replacement of at least one of the driver transistors. One of the jobs was done by a tech whose training appears to have been at Hormel. He or she didn't know the difference between careful soldering and slaughtering hogs!) All 60 new lamps were installed and aligned (And I carefully made sure to get all their polarities right! <grin>), and the soldering job was inspected both visually under a magnifier and with an Ohm meter. The visual inspection found only one cold solder joint, and the meter found only one short (from a "sailor joint": gobs of solder), both of which were corrected. The driver transistors had previously been verified by junction checking. We should be set to go. I would recommend should a re-lamping ever again be required that LEDs rather than incandescent lamps be used. The availability of suitable lamps is questionable in the future (I just happened to find a stock of 300 at Mouser Electronics, now down to 250), and the ability of the lamp circuit board to take too many more re-lampings is questionable. A standard 20mA T-1 yellow LED (watch that polarity!) in series with a 680 Ohm 1/2W resistor to handle the roughly 15V drive voltage, "air-bridge" constructed to fit into the hole in the masonite light blocker of the front panel, would be a suitable permanent replacement for one of these lamps.

23 years, 6 months

1
0
0 0

Scoring system for messages to avoid annoying dweebs?

by csmith＠amdocs.com

> -----Original Message----- > From: Sellam Ismail [mailto:foo@siconic.com] > For instance, this message would get negative votes for being > off-topic, > my score would go down, and then some people might find it > preferable to > ignore future messages from me based on my score ;) What happens when everyone votes each other down to 0? :) Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

23 years, 6 months

2
1
0 0

IRIS Power Series power supply questions

by csmith＠amdocs.com

> -----Original Message----- > From: ard(a)p850ug1.demon.co.uk [mailto:ard@p850ug1.demon.co.uk] > Do any of the wires show a low resistance to the frame? If > so, then that > one must be earth (or there's an insulation breakdown somewhere). I'll check. Probably should have thought of that, myself. :) Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

23 years, 6 months

2
2
0 0

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb January 2002