test-drb December 2005

test-drb@ccmp.vtda.org

235 participants
580 discussions

by charlesmorris＠direcway.com

I asked about this last year but no one recognized it... This "mystery board" came in a batch of Omnibus boards I bought for my 8/A. I think it's some kind of video display card? http://tinypic.com/jax62r.jpg http://tinypic.com/jax6w4.jpg -Charles

20 years, 1 month

Changing the clock frequency slightly (PDP-11)?

by charlesmorris＠direcway.com

After pulling out my hair for a while trying to get my PDP-11 to talk to me, I finally discovered that the master clock (26.667 MHz crystal oscillator) is dead. (KDF-11BA CPU board). Those metal-package oscillators are very common and inexpensive (around $2), but I can't find one in that exact frequency. 25, 25.175 and 27 MHz units are available. Semi-custom ones aren't terribly much more expensive (~ $15) but have longer lead times. Is there anything in the circuitry that can't be run a little slower (or 1.2% faster, 27 MHz)? I'm not worried about squeezing every last MIPS out of it. thanks Charles

20 years, 1 month

SOL-20 keyboard question

by dwight.elvey＠amd.com

>From: "Chuck Guzis" <cclist at sydex.com> > >The following site seems to think that you can use junker Sun 4 keyboards >for parts: > >http://www.thebattles.net/sol20/keyboard.html > >--Chuck > Hi Some types of foam don't last long. I wonder if one could make some with closed cell foam instead. It last much longer but is a little stiffer than the foam that they seem to be using. If it is a capacitive you should be able to make new capacitors with some aluminum foil and clear tape. Just my thoughts Dwight

20 years, 1 month

Housing collections (was: other Utah collectors?)

by henk.gooijen＠oce.com

A bit long reply ... My collection outgrew the room in which all was more or less "in storage", because I got so many that there was no more room to play with them. That's the point when I decided that I needed more space. Renting some storage is not expensive in the beginning, but that are recurring cotst every month. An other drawback is that such a storage is not near your house, so (what I do almost every evening) going to have a look at the collection (I love the sight of those machines) would not be possible. I could build something in the backyard, but there were restrictions from the local authorities, otherwise it would sure be at least twice as big! The outside measures 30 sq. m. It is built like a house: a good floor to carry +/- 5000 kilo (at this moment) and under the tiles is a 500W. electrical heating. I wanted to keep all machines in a "good" environment so, the temperature is never below 10" Celcius, even now, when it is outside freezing 7" Celcius. To keep the temperature inside there is 10 cm spacing between the outside and inside walls. That 10 cm consists of air and glass-fiber insulation, the normal stuff used in Holland when a house is built. The inside stone wall is made of bricks that have small air pockets (for better temp. insulation). I would have built a bit cheaper (especially the windows and the door), but my wife insisted: you build it *good*, or you don't build at all! Regarding the power installation, I had to get that from the closet where the power company cable enters the house. As I could not wire *under* the house, I had to dig a 60 cm trench around the house (deep, I know, but I do not want any hassle >from local authorities). I have put in 5-wire 4 sq. mm. which is good for 3-phase power, at least 32 Amps per phase. If I "upgrade" the power company fuses (behind seals, so I can not do that myself), I actually can draw 16 Amps per group at 230 VAC. and I have 6 groups! That should be enough to run the PDP-11/70 and the two RM03s at the same time. BTW, the "making of ..." does not show everything. There are a lot of small construction details that I did not know of. But my neighbour (it is not my brother, but hey, the Dutch "IRS" might read my site) works in the "construction business", and I would have done a few things not so well. While building they are simple, but when it's done and you have trouble with damp walls, things are not so easy anymore! Oh, and the outside roof was done by a chap retired in that business. So, the place was built "after hours". It saves a lot of money, but the drawback is that the construction took approx 6 months. Actually, I have the power just since two months! And now I am sort-of-playing with the first machine, the 11/34C. After three years not-powered, I have had a lot of problems getting the machine to run, and I am still not out of the weeds! But I do learn a lot in the mean time. Tip: run your machines at least once a month to keep them "healthy"! Talk nice to them :-) I will shoot new pictures of the "computer room", of which you can see one on the "Update Status" page. The wall at the end is not so empty anymore ... The latest addition is *NOT* a DIGITAL machine. Allthough I do restrict myself to DEC, I could not resist the offer of a DATA GENERAL NOVA 3D with the machine matching printer and terminal. Further, it has 192 Mb memory (so MMU must be installed) and it has two disk drives, and comes with several 10 Mb cartridges. Plus 3 boxs of documentation still shrick-wrapped. I did a quick check on bitsavers, and saw noting of the 3D. I guess the new year will bring a lot of scanning work ... If you ask "why get that non-DEC machine?", the answer is simple. For two reasons: 1) DG was founded (?) or the Nova was built (?) [not sure what applies] by people that left DEC! just like Amdahl was founded by poeple who left IBM, and 2) it's a complete, and original setup. BTW, the I will keep the Nova in the house, next to the HAM radio stuff. But it is a tight fit, getting full again! If I ever win the lottery big time, I will move. My wife can decide on the (new) house, I am just looking for s p a c e , (not the final frontier). About 3 times what I have now would be nice, for starters :-). Everybody, a healthy 2006! (the most important thing in life, whatever you collect!) - Henk, PA8PDP. ________________________________ Van: cctalk-bounces at classiccmp.org namens Richard Verzonden: do 29-12-2005 07:02 Aan: General Discussion: On-Topic and Off-Topic Posts Onderwerp: Re: Housing collections (was: other Utah collectors?) For those of you that have larger machines, do you set them up in "machine room" configurations like the Netherlands PDP-11 room? Do any of you have your collection housed somewhere with a raised machine-room tile floor for routing cables underneath? ;-) -- "The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ: <http://www.xmission.com/~legalize/book/ <http://www.xmission.com/~legalize/book/> > Pilgrimage: Utah's annual demoparty <http://pilgrimage.scene.org <http://pilgrimage.scene.org> > This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.

20 years, 1 month

Available: Multibus form-factor Augat boards

by dwight.elvey＠amd.com

>From: "William Maddox" <wmaddox at pacbell.net> > >I have four of these to get rid of. They are used and >wired, and most have bypass capacitors soldered in on the >component side, but the wiring side is wire-wrap only. >These aren't the greatest boards, and I doubt that unwrapping >them is any fun, which is why I culled them from the lot that >I bought. They are available for the cost of postage, however, >or free for local pickup in Santa Clara, if anyone is interested >in them before they go to the scrapper. > >--Bill Hi Bill I got to go. If you want to contact me tonight, email me at dkelvey at hotmail.com. I'll check that email later. I also have a cell phone. It is 408 242 9798. Later Dwight

20 years, 1 month

IBM 3084 thermal module, s50 card, Pro 350 memory, NI GPIB, Tandy 100 and more

by innfoclassics＠gmail.com

I have a bunch of interesting stuff on eBay. The IBM 3084 Chip and thermal module in its last few hours. The reserve is half of what I mentioned earlier. Also a S50 card with 8 Intel 1702 Eproms. New memory card for a DEC Pro 350, National Insturments GPIB card, Tandy Model 100 laptop outfit, Data I/O 6802 plug Texas Instrument 320C25GBL Digital Signal Processors HP 41 minicasette and a Quantum SCSI DLT IV tape drive model 7000 My sellers name is Innfosale http://search.ebay.com/_W0QQsassZinnfosale -- Paxton Hoag Astoria, OR USA

20 years, 1 month

GRiD 386 free to good home (must be claimed by tomorrow)

by spectre＠floodgap.com

I am in urgent need to reclaim some space and as part of this, I'm getting rid of my 386 GRiD laptop. It was flaky, but working last time I tested it. Includes battery, external floppy, and whatever else I can throw in. Free to a good home. Pickup in Inland Empire, So Cal preferred. I will ship, but this is heavy as hell and you can expect to pay about $30 to get it there by UPS. Let me know. This needs to be claimed by tomorrow! -- --------------------------------- personal: http://www.armory.com/~spectre/ --- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- Arguments with furniture are rarely productive. -- Kehlog Albran -----------

20 years, 1 month

Cap reformation question

by dwight.elvey＠amd.com

>From: "Dave Dunfield" <dave04a at dunfield.com> ---snip--- > >You should perform the procedure with the power-supply under no load. >(ie: remove all the cards). If it is truly under no load, then you won't need >to move "up" in lamp sizes, because as the caps charge, the current drawn >by the supply will fall off toward zero, and the voltage dropped across the >lamp will drop toward zero. As the current drops, the lamp filiment will cool >causing it's resistance to drop as well. If there is no load at all, then the line >voltage to the system would reach "normal" even with a low wattage lamp in >series. Hi The lamp may still glow noticable because of the inductive current of the transformer. It is better to look at the voltage on the capacitor as an indicator. It is still better to disconnect the larger caps and reform from a DC supply and resistor. IMHO Dwight

20 years, 1 month

Fluke 9010A or 9100 equipment

by lundin_bjorn＠bredband.net

Hello Kev, are you still looking for a 9010A? Mine comes with an 80186 pod and I belive it was working last time it was powered up. Yours Bjorn Lundin Mariehallsvagen 49 S-18438 Akersberga Sweden

20 years, 1 month

TI DS990

by drb＠msu.edu

Had a message today from a local forge disposing of a TI DS990. I've not talked directly to him yet, or seen the hardware. I've never been exposed to these machines, so know little about them. I've been googling and searching archives to see if I could figure out values, etc. This is not something I'd take for my collection, but would be happy to store temporarily for someone else. Info that might be useful for a first contact or survey appreciated. De

20 years, 1 month

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test-drb December 2005