test-drb

test-drb@ccmp.vtda.org

101090 discussions

John Foust via cctalk <cctalk@classiccmp.org>

by kiwi_jonathan＠yahoo.com

Hello, You mentioned a VAXstation and a Microvax. What encosures are they in? (That will affect shipping costs). Is the micro-pdp/11 in a BA23 with complete skins? thanks -Jonathan Stone

4 years, 6 months

September 25th Kennett Classic - Only 9 Days To Go

by billdegnan＠gmail.com

Only 9 days until the 2nd-annual Kennett Classic URL for more info: https://www.kennettclassic.com/ Download flyer: https://www.kennettclassic.com/kc2/kennett-classic-flyer-KC-II.pdf WHAT: Our yearly event to celebrate another year of operations. WHERE: 115 S. Union St. Kennett Square, PA USA (Between Philadelphia and Baltimore). The venue is called "The Garage", it's a large ventilated building located across the street from the museum. WHEN: [ 8AM ] the workshop / hackerspace opens [ 12 Noon - 5PM ] - open to "the public" exhibits So far we have about 10 exhibits - We could use a few more, please inquire if interested. [ 5-7PM ] - Retooling for the music performances / Dinner There are a dozen restaurants within walking distance and lots to do in Kennett Square, PA or you can use that time to tour the museum, or just stay in the building and continue your work [ 7PM - 11PM ] Live Chiptune / Wave-bending performances! --BANDS-- AP0C Inverse Phase Cheap Dinosaurs (sound clip links from kennettclassic.com) QUESTIONS? https://www.kennettclassic.com/contact.cfm

4 years, 6 months

ISO PFT (Precision Fabrication Technologies) MOD-U-LINE catalog/brochure

by aek＠bitsavers.org

PFT made MOD-U-LINE MCLS modular aluminum enclosures (sides, top and front/back). The only information on the web is https://www.ceitron.com/passive/pft.html Does anyone still have a copy of their brochure? They were used a lot for projects in the 70's and 80's like the PCM-12 The company was bought by Zero Mfg in the 90's. There isn't anyone making anything like that now. http://www.dvq.com/oldcomp/PCM12/pcm12-1.jpg

4 years, 6 months

HP 5061-3476: Which boards go where

by cz＠alembic.crystel.com

Quick question: I've been cleaning out and repairing an HP5061 supply for a 1000 computer. However I didn't take a picture of the 4 boards when I pulled them and I want to make sure they go in the right places. From the manual (page 99 of 92851-90001_Sections-IXB_Mar-1981.pdf) the slots are labeled A6-J1 through A6-J5. Does this mean that: J1 is the J5 is the control board (A3A5) J4 is a jumper board for +12 adjustments J3 is unused (battery backup boards) J2 is the inverter board (A3A2) J1 is the pre-regulator board (A3A1) Seems right but I know how bad things can go :-) Thanks! C

4 years, 6 months

[FTGH] DEC Professional magazine, 32 issues, 1988-1990

by toby＠telegraphics.com.au

Hi, If anyone is interested, these are available for cost of postage from Toronto Canada. I will post selected sets but if someone wants the lot, be quick. First come, first served... https://imgur.com/MggLbvQ --Toby

4 years, 6 months

Sun keyboard and mouse new in box on shopgoodwill

by bob099＠centurytel.net

https://www.shopgoodwill.com/Item/129829234

4 years, 6 months

Wanted: Sun Sparcstation Classic/LX PS Fan

by knowak＠alumni.calpoly.edu

Hi All, Does anyone by chance have a collection of fans? The one in my Sun Sparc Classic died and I am having a hard time finding a replacement with the same specs. Or can anyone recommend a good source? It's a Nidec BetaV, TA225DC, Model M33402-55 Thanks! -Kurt

4 years, 6 months

DEC BA11-K noisy fans

by fritzm＠fritzm.org

Hi all, I've been working on a BA11-K PDP-11/34 lately, and wow it sure is a noisy thing... On my '11/45, the "Boxer" fans were easily disassembled via a cir-clip, and could then have their bearings cleaned/relubed (or worst case replaced). Fan maintenance quieted down the /45 a good bit. But these larger 6" Amphenol units don't look quite as easy to get in to... Is the plastic rotor on these just a press fit? Any tricks to getting in there for maintenance? Or are these "you have what you have" and the only option if unsatisfied with their current performance to replace them entirely? cheers, --FritzM.

4 years, 7 months

Archiving classic computer rubber part information

by aek＠bitsavers.org

I've been having fun this past week trying to get the mechanics of a Canon CX print engine in a LaserWriter restored. The paper pick and separation rollers have turned to goo. This got me thinking that people need to start collecting information on rubber parts, like dimensions, material and durometer values for all of these parts before they fail. I found nothing on line about making replacement parts for these. No one stocks replacement parts for anything older than a Canon SX engine (the generation after the CX). Another problem child are Datamation card readers. It's been 20 years now since the last ones were pulled out of service after the 2000 election and there seems to be a steady stream of people trying to make replacements. I think the CHM 1401 guys replaced theirs a few years ago, don't know if they collected mechanical info or where the repair units were made. I've also heard that Terry of Terry's Rubber Rollers is recovering from Covid, and a frequently used place that refurbished typewriter platens has gone out of business. People have suggested https://www.jjshort.com/Recovered-Rubber-Rollers.php as an alternative.

4 years, 7 months

Scanning Suggestions (Bookmarks & Colour)

by paul＠frixxon.co.uk

With apologies for breaking the threading, as I've just rejoined and I'm responding to something I've just spotted in the archive ... Regarding colour separations for scanned documents, GraphicsMagick is quite capable of producing the required individual colour layers. If you identify the colours you wish to pull out, you can use the "-fuzz" and "-opaque" operators to change any given colour range (fuzz uses Euclidean distance in RGB space) into another one (the current "-fill" colour). I haven't finished writing this up, but my workflow tends to be to produce a Group4 TIFF from the colour scan by simple thresholding (or first dropping the other colours to white, if they are quite dark), and then produce all the other separations by dropping black out, converting your spot colour to black and then thresholding. This way you get two or more images: 1) PNG(s) containing pixels that are all either white or your spot colour, 2) a G4 TIFF for the black and white layer. The PNG must be saved as a two-colour paletted image so that they can be used as masks in the final PDF. I always apply the black and white (text) layer on top of every page, so that the fuzzing of the colour layers doesn't reduce the clarity of the text. This might sound awkward, but I've found that one fuzz value tends to work for all the pages when extracting a given colour, so you can process all pages in a loop. I use the Perl module PDF::Builder to put my scans together, but I think tumble is capable of overlays too. PNGs are compressed with deflate. If the spot colours you are processing apply to text in the document, my first thought was that I could save a bunch of Group4 TIFFs, one for each colour, and mask those into the PDF, because Group4 compression is impressive for text. It took some frustrating experiments before realising the Group4 compression isn't defined for two colour images in general; it is specifically for images that are black and white, and PDF won't let you circumvent that! I've just scanned another document with some blue diagrams and table backgrounds, if you'd like to see an example: https://vt100.net/dec/ek-0la75-ug-002.pdf I might reprocess this later, but for now, I didn't even bother separating out pages that contain blue from ones that don't; every page has a blue layer, even if it's blank. If you're wide awake, you may spot that the blue layer on page 41 doesn't extend to the bottom of the table. This isn't a processing flaw; the document is actually printed like that. Regards, Paul

4 years, 7 months

FYI: NDWiki - planned downtime

by tingox＠gmail.com

Bitraf[1] is moving, and the NDwiki[2] server moves with it. The move starts Saturday September 11th 2021 at 12:00 hours local time, and is expected to be completed sometime before midnight. References: 1) https://bitraf.no/ 2) http://www.ndwiki.org/ -- Regards, Torfinn Ingolfsen

4 years, 7 months

vcfmw

by useddec＠gmail.com

Due to health problems I won't be able to attend vcfmw this year. I live just outside Champaign, IL, I-57 & I-74, about 2 hours south of I-80, and 2 hours west of INDY. If anyone is interested in l buying anything I should be home a few days before, during and after WCFMW. Please email me with the time and day you would like to stop, and what you are interested in seeing/buying. I hoped to hang on to most things for a while, but I'm afraid I'm going to start letting loose more and more. Thanks, Paul I'm located just outside Champaign, IL, I-57 & I-74

4 years, 7 months

Museum of pinball goes to auction this weekend

by barythrin＠gmail.com

Incase anyone hadn't heard or has interest, a lot of arcades will be on the market for bidding this weekend. Sad but inevitable. Hopefully it's not all reseller prices and can get into the hands of some other museums and collectors. https://www.nbclosangeles.com/news/local/arcade-games-auction-museum-of-pin…

4 years, 7 months

Looking for an IBM 3803

by gcnielson＠yahoo.com

I was digging through the internet and found a post where a 3803 was posted for sale, would there happen to still be one available?Preferably a model 2 Thanks,gcnielson at yahoo.com

4 years, 7 months

Data General NOVA 2/10

by ccth6600＠gmail.com

I just started working on a Data General NOVA 2/10 which is in quite reasonable cosmetic condition, but has a number of problems. The system comes with 8 kwords plus 16 kwords of core boards and a "Cassette I/O" board and the CPU board. After reforming the "man sized" caps and verified the power rails I took a leap of faith and plugged in the CPU and the 16 kword core board. I managed to deposit a few bit patterns and read back mostly what I deposited. After a few power cycles I could no longer deposit values and read back what I deposited. I also noticed that a 30 Ohm resistor rated at 3W which previously got quite warm now stayed cold. That PCB area around that resistor has cooked in the past and has changed colour - not dramatic, but it obviously got quite hot in the past. Unfortunately I didn't find a good schematic specifically for the Nova 2/10. There is one for the Nova 2/4 up on Bitsavers, but it is hard to read and does not cover the NOVA 2/10 which is not quite the same as the NOVA 2/4. For example the power supply is completely different. Until now I have been spoiled with quite decent DEC PDP-8/e documentation and would be surprised if Data General did not provide a similar level and quality of documentation. Maybe I am looking in the wrong place. Thanks Tom Hunter

4 years, 7 months

FTGH: 19" Intergraph Monitors

by cube1＠charter.net

I have an Interpro 2020 and a couple of HUGE 19" inch Intergraph monitors. Frankly they are pretty lousy (fuzzy, not all that luminescent), heavy and awkward. Free to a Good Home - cables included. But I won't ship them, though one could pay someone to crate them up and ship them. I really don't want them around, and so I just converted my Interpro 2020 to use LCD flatpanels with a DB5w5 to VGA cable. You can read more about my new cable setup for this machine, and see one of the old monitors, at: https://www.computercollection.net/index.php/unix-workstations/#interpro2020 JRJ

4 years, 7 months

Identifying LSI Logic IC

by kylevowen＠gmail.com

Can anyone identify this IC? https://imgur.com/a/CU7Cn8z This is from an Omega VLF receiver. I don't see many custom parts within this unit, but perhaps this is one? Thanks, Kyle

4 years, 7 months

PDP 11/40 for sale, Paris, France

by stephane.tsacas＠gmail.com

Hi, If you're interested, contact me directly. It was in my apartment for years, I had to move it to the garage, and I don't like the idea of leaving it there for the winter. It's a PDP11/40 in a DEC rack. It was in working condition when I got it, only the memory card had a problem (1 capacitor has been ripped off), but reading/writing from/to the registers was working. No need to say that you have to arrange shipping ! Thanks, -- St?phane

4 years, 7 months

Lecture: The evolution of TECO and EMACS – hands-on demo, 2021-09-11, 19:00

by stueberahoo＠yahoo.de

Hi all, you're invited to the Update computer club[0] public lecture series "Updateringar"[1]! When: 2021-09-11, 19:00 CEST Where: https://bbb.cryptoparty.se/b/upd-0mo-m2u-aq8 The evolution of TECO and EMACS ? hands-on demo The Emacs text editor has long been an important tool among programmers, and has a long and rich history. I will talk about the development of the TECO and Emacs line of editors throughout history. The emphasis is on practical demonstration of programs found through software archaeology. True to form, the bulk of the presentation will be broadcast using ancient technology. Lars Brinkhoff (ICtech) The lecture is free and open to everyone. Upcoming: 2021-10-09, 19:00: Update Computer Club: History and not-so-certain future. Pontus Pihlgren (Update) Don't want to miss upcoming events? Subscribe to our low-traffic announcement list by sending a mail with the body "subscribe announce" to majordomo at update.uu.se! Hope to see you there, Anke [0] https://www.update.uu.se/index_eng.html [1] https://www.update.uu.se/wiki/doku.php/projekt:updateringar

4 years, 7 months

Anyone Have the H9642 Enclosure Maintenance Manual EK-187AA-MG

by robert.jarratt＠ntlworld.com

I have looked on Manx and on Bitsavers and I don't see it there. Thanks Rob

4 years, 7 months

VAX4000 VLC diagnostics/console

by binarydinosaurs＠gmail.com

Hi folks, I'm testing a little BlueSCSI adapter (BlueSCSI <https://scsi.blue/>) which while being aimed at 68K Macs should also work as an 8 bit target for older VAXen, it's a newer cheaper SCSI2SD solution and I should point out it works as intended on a Mac Plus so the module itself is fine. Nobody appears to have tested on small VAXen yet so tonight I dug out my VLC to give it a go. Powering up with nothing attached apart from an MMJ/H8571 cable I get nothing on the console, I'm using PuTTY via a genuine COM1 port on a PC which is one level above what I used last time I powered the machine up (FTDI USB adapter to a laptop). Diagnostic LEDs cycle through the tests and end up at '1111 0011' which according to the manual is 'entering the console program'. Clearly the DALLAS has passed the TOY tests, but if it's not happy would that stop the console displaying? It doesn't matter how I set S3, next step I guess is to hook it up to a 'proper' VT. Cheers, -- Adrian Graham Owner of Binary Dinosaurs, the UK's biggest private home computer collection? t: @binarydinosaurs f: facebook.com/binarydinosaurs w: www.binarydinosaurs.co.uk

4 years, 7 months

Replacement for Foam Filter for PDP 11/24

by robert.jarratt＠ntlworld.com

Another query. The foam filter that sits in the front of my 11/24 CPU is clearly badly degraded and needs to be replaced. What do people replace this kind of stuff with? I guess it mustn't be too fine, this mesh seems quite coarse. https://rjarratt.files.wordpress.com/2021/09/1124-front-panel-2.jpg Thanks Rob

4 years, 7 months

Capacitors on M8722 Board

by robert.jarratt＠ntlworld.com

I have a PDP 11/24 which I hope to power up soon. The last time it had power I noticed a bit of a burning smell which I failed to track down. However, I did notice one capacitor on a memory board has a strange appearance, almost as if there is some corrosion under the surface, it doesn't seem to be bulging though, except along the top, but if it is bulging it is very bumpy. I have a picture of it here: https://rjarratt.files.wordpress.com/2021/09/wp_20210904_10_15_28_rich.jpg. It is marked 47uF 30V, but it is also marked 20v as can be seen in the picture. I lifted it to measure its capacitance and ESR. It measures about 80uF and the ESR seems OK. I am unsure whether to replace it, and if so what voltage rating should I replace it with? I don't understand if this is a 30V rated capacitor or 20V. It seems that Unibus has some 20V signals, so I guess 20V might be right? I don't think 30V or 20V parts exist though, so I would need to get 35V or 25V. Maybe the voltage rating isn't too critical? Any advice? Thanks Rob

4 years, 7 months

VCF East

by mloewen＠cpumagic.scol.pa.us

Here's the official show flyer for VCF East, October 8-10. Please pass it around. https://drive.google.com/file/d/1GsmXLA2vIsBFWTcmMJLZfq1OQlxmShBU/view Mike Loewen mloewen at cpumagic.scol.pa.us Old Technology http://q7.neurotica.com/Oldtech/

4 years, 7 months

FTGH 9t tapes

by db＠db.net

Somehow these were sitting in my basement rafters for years. The tape seems ok on the big reels but I believe one of the small reels was gummy. Several write rings on the pile too. I'd rather not have to box these up TBQH but I will if someone really wants them. Location Ottawa Ontario Canada http://www.db.net/~db/tapes.png Diane -- db at FreeBSD.org db at db.net http://www.db.net/~db

4 years, 7 months

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