test-drb

test-drb@ccmp.vtda.org

101090 discussions

by kahrs＠caip.rutgers.edu

A fascinating topic. Here's a fun patent to read: http://www.google.com/patents?id=lBJtAAAAEBAJ Patent number: 2614169 Filing date: Jul 24, 1950 Issue date: Oct 1952 Inventor: A. A. COHEN Assignee: Engineering Research Asso Some mention is made of how they made it in 1950. Coombs original patent: http://www.google.com/patents?id=gSBXAAAAEBAJ&dq=patent:3119110 Patent number: 3119110 Filing date: May 2, 1949 Issue date: Jan 21, 1964 Inventor: J. M. COOMBS Assignee: Sperry Rand Corporation They appear to use spray paint --- not deposition.

17 years, 5 months

Stuff for sale, trade, and free! (Bloomington, IN)

by bdwheele＠indiana.edu

Its time to clean up things a bit...mostly stuff I've not had the time or desire to play with :) If I'm too high (or too low) make an offer! I'm not going to ship the complete NeXT boxes or the box of tapes, but I can be persuaded with everything else: buyer pays shipping I'm located in Bloomington, IN 47408 Things I'm looking for: * Playstation 2 * Amiga Stuff: A1200, A600 * CoCo stuff: Coco3 + disk controller * Commodore stuff: C128, 1571, 1581, C65 (hahaha) Get this stuff out of my house! Brian For Sale ========== NeXTstation (Mono) $50 32M RAM no HD Mono Monitor Mouse Keyboard Floppy Drive NeXTcube $75 64M RAM NeXT Dimension Card Color Monitor (needs 13w3 cable) Mono Monitor Mouse Keyboard Floppy Drive no HD 3x NeXT Mono Video Cable $2 each NeXT Keyboard+Mouse $5 DECserver 200/MC $5 Sun DDS2 DAT Drive in 611 Enclosure $10 599-2072-01 OkiData 184 Turbo $20 New in box 20x 10baseT external tranceivers with cable. $1 each Box of TK50s (86 tapes) $20 Distribution tapes circa 1989-1992. Ingres, RDB, Fortran, VMS 5.4, VMS 6.0, etc Freebies ======== DEC Multia AXP 166MHz Unknown condition. 32M RAM No HD 2x HP 715/64 Unknown condition One has 64M(?) and a disk. One has neither. Both show "Memory error" (leds -76-43--) SS20 Chassis No disks or ram. Didn't see a processor in there either. VAX C Manual Toshiba Satellite 400CS/810 P75 / 700M Disk / 16M RAM Battery seems to work, but no promises. External DAT, Centronics connectors. Unknown capacity 2x Ext SCSI enclosure w/centronics connectors. sun 411 enclosure size Model M Keyboard (original PC connector)

17 years, 5 months

coating a drum

by aek＠bitsavers.org

http://www.google.com/patents?id=o9IwAAAAEBAJ&printsec=abstract&zoom=4&dq=3… gives you the general idea. lots more patents are there the proportions of binder to gamma-Fe2O3 and other magic sauce as dispersants is of interest.

17 years, 5 months

After an H960 rack..

by toby＠coreware.co.uk

Hi, I don't suppose anyone in the UK has any H960 DEC racks looking for a good home? I'm in the process of moving all of my collection from my storage unit to my office server room and I'm short of racks to put it all in. Would be nice to put it all in correct period racks. Condition not important as I am a dab hand at cleaning and de-rusting. Thanks, Toby -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

17 years, 5 months

Hard disk material

by wbblair3＠yahoo.com

> That claim of some drums operating at 75,000rpm has to be a typo... > I can believe 7500 - but 75,000? Ouch! Eckert once made the claim that, ?laboratory models have been operated in excess of 75,000 rpm.? That's probably where they got that.

17 years, 5 months

New home sought for a PDP-11

by gordonjcp＠gjcp.net

Hi all, I've come to the conclusion that it's time my PDP11/73 went to a new home. Not a terribly easy decision to make, but I just don't have space to even get to it to switch it on just now and I'd rather see someone else get some use out of it. Anyway, here's the spec: PDP11/73 in a large Baydel cabinet with a 40M-ish MFM drive RX02 floppies 2 x RL02 plus a spare RL02 2 x CIT101 terminals VT520 terminal VT220 terminal LA36, spare ribbons and paper spare boards including 11/03 bits, a couple of opto-isolated I/O boards and some ADC boards DEQNA about a dozen RL02 packs large box of RX02 disks RT-11 V5.2 manuals Pick up in Glasgow. You'll need a van, although not a very big one, to shift it. A large estate car would be too small unless you broke the rack down into panels - a PITA, I've done it before though. Mail me on- or off-list if you're interested. Gordon

17 years, 5 months

Hard disk material

by bnansel＠bigpond.net.au

Sun Nov 23 Eric Smith wrote: > Nickel plating would definitely not work. Some of the earliest drums > used cunife (copper/nickel/iron alloy) wire tightly wound around an > aluminum cylinder, then turned on a lathe to get a flat surface. ... Hmmm . . . that technique might work for my 2N2/256 BSCP project! It also occurs to me that the machining could be done with the drive mechanics, provided it's rigid enough and you take very light cuts. You would fabricate a cutter head that bolts in the same way as a R/W head. To take a cut, you just tweak the adjustment screw(s) and turn an additional "feed" screw to cut the track the right width. Heck, you wouldn't even need the feed screw. Make the head so it can slide laterally a millimetre or two, then you could move the cutter head back and forth by hand, the same way the Fonly lathe works. It also might be possible to just lap the R/W heads in with a tiny amount of jewer's rouge, then carefully clean all the grit out and readjust the heads to give the right gap. -Bobby

17 years, 5 months

Help with Shugart SA801 8" floppy with 230v 50 cycle

by technobug＠comcast.net

On 24 Nov 2008 13:15:50 -0800, Chuck Guzis" <cclist at sydex.com> wrote: > On 24 Nov 2008 at 14:39, John C. Ellingboe wrote: > >> I just got off of the phone with Small Parts "AGAIN" and was informed >> that after messing around and dragging their feet for 6 months they >> finally decided to refund my money and were not going to be >> handling the >> items I ordered. You may not want to trust them with your money, I >> know >> that I can't... > > That's too bad; they used to be a pretty decent outfit. > > So where does one go for small engineering findings nowadays? I've > used McMaster-Carr for some things, but that's not their specialty. Over the years I've been using WM Berg <http://www.wmberg.com/>. CRC

17 years, 5 months

Hard disk material

by aek＠bitsavers.org

like this, perhaps? http://www.google.com/patents?id=q8pJAAAAEBAJ&dq=3225183

17 years, 5 months

Seeking Proteon P4100+ router manuals

by dave＠mitton.com

Sellam, et. al. As others have contributed, Proteon was an independent network vendor in the 1980s. I'm a little unclear what became their corporate fate, (I forgot about DEC buying source code) but they did eventually come apart due to market forces. They were an early token ring manufacturer, with their own product. When IBM pushed their technology into the IEEE 802.4 standard, they adapted with the market. They also made multi-protocol routers, and since they weren't Cisco, Digital did do some work with them. I had a 4100+ and a 4200 in my development lab. Unfortunately for you I don't think I took any of that stuff home. I was the technical lead/architect for a DECnet Token Ring Data Link specification. As part of that program, I also specified how to interface DECnet-DOS/Pathworks on to PC token ring devices. We worked with Proteon to put DECnet routing support into their routers, and I think they are whom we got to OEM an 802.4 Qbus NIC card for us. (with DECnet VMS support!) This was all to deal with the pressure IBM was putting on the PC and networking business at the time. (my memory is fuzzy on that now.) God I'd love to see what happened to the customers that swore that token ring was so superior to Ethernet that it was going to rule their networks going forward. IBM put some interesting crocks into their LAN chips wrt multicast addressing that really messed things up. I'm glad to see that chapter of history closed. I may be able to make some personal contacts to see if they have anything around. I woundn't be suprised if there is a Proteon old users/collectors group out there somewhere. Dave. ---- On Nov 24, 2008, cctech-request at classiccmp.org wrote: Date: Wed, 19 Nov 2008 19:08:26 -0800 (PST) From: Sellam Ismail <sellam at vintagetech.com> Subject: Seeking Proteon P4100+ router manuals To: Classic Computers Mailing List <cctalk at classiccmp.org>, Bay Area Classic Computing List <baccl at lists.baccl.net> Message-ID: <Pine.LNX.4.61.0811191900180.22337 at vintagetech.com> Content-Type: TEXT/PLAIN; charset=US-ASCII I'm looking for a set of manuals for the Proteon P4100/P4100+/P4200 routers, circa 1989 or earlier. I'm guessing Proteon was an independent company until DEC bought them at some point? Just guessing. Anyway, if you've got a set of manuals I'd be interested in purchasing them from you. Please contact me directly if you have some. Thanks! -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

17 years, 5 months

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