test-drb August 2020

test-drb@ccmp.vtda.org

116 participants
97 discussions

by jnc＠mercury.lcs.mit.edu

> From: Peter Van Peborgh > From: Antonio Carlini > From: Jim Stephens Everyone: please DO NOT send messsages to CCTalk/CCTech with no Subject: line in the header: that results in un-linked, and thus un-clickable, entries in the archive (which some of, like me, use to read the list), e.g.: http://www.classiccmp.org/pipermail/cctalk/2020-August/date.html Thank you. Noel

4 years, 5 months

Diloq SQ703 to SQ706 conversion

by nw.johnson＠ieee.org

I'm getting back to trying to restore my MicroVax II.? Existing controllers are ESDI and MFM, disks hard to find. So I would like to convert a brand-new DQ703 I have to SQ706 so I can mount SCSI disks. I understand it is just? a prom change. Does anybody have any info, or perhaps a PROM image? cheers, Nigel -- Nigel Johnson, MSc., MIEEE, VE3ID/G4AJQ/VA3MCU Amateur Radio, the origin of the open-source concept! Skype: TILBURY2591 nw.johnson at ieee.org

4 years, 5 months

Wanted: misc TU56 parts for use with a TD8-E

by mosst＠SDF.ORG

Hi All, I'm looking for the following parts to configure my TU56 for use with a TD8-E: G742 (Positive Logic Jumper Card) M960 (TU56/TD8-E Command Cable Connector) M961 (TU56/TD8-E Data Cable Connector) 7008447 cable H716 PSU I'm happy to buy or trade, if there's anything you're looking for feel free to ask. Regards, -Tom mosst at sdf.org SDF Public Access UNIX System - https://sdf.org

4 years, 5 months

No subject

by peter＠vanpeborgh.eu

Guys, Anyone interested in my eBay posted punched card selection? https://www.ebay.co.uk/mys/active Thanks, Peter vp

4 years, 5 months

LA / SoCal area SDS branded (Sigma S7) Teletype Model 35 Avail.

by billdegnan＠gmail.com

Looking for someone in the LA area who knows how to properly pack and a few ship vintage items to be mailed to me. A computer, monitor and parts. The seller is not experienced in this and as a result the first thing that I got from him (A Model 33 Teletype top) was trashed. I don't want the stress of explaining or worrying about the next batch of stuff. So I turn to you, the vintage computing community to help. You get: Teletype Model 35 that I am told is in very nice shape. I'd love to take it myself but shipping is too expensive and difficult. The Pedestal is branded SDS, as in the old Sigma S7 computer. Xerox bought them out and sold the Sigma afterwards. That would date the Teletype in the late 60's or so. This would be a nice museum piece. I am told the Model 35 is practically unused. I get You pack and ship properly (you supply boxes and bubble wrap) a late 70's business PC, display terminal, and a TTY Model 33 pedestal (I already have the TTY itself). I anticipate the computer will be heavy and delicate and will need to be partially disassembled to add a little padding to the inside and to intelligently check out what you're dealing with. I am experienced in shipping this kind of stuff, and if it was me, I would expect it to take someone in LA area three or four hours to get the materials at the store, box, disassemble/sure up, pack, go to the post office, ship etc. I want it mailed USPS as I live in a rural area and they're the best here. This is the community, do I have a taker? If so contact me privately through https://www.vintagecomputer.net/contact.cfm. My timeline is next two weeks if possible. Thanks BIll Degnan kennettclassic.com vintagecomputer.net P.S. I will likely have a line to more cool stuff in LA area from this guy. You might want to check out what else he has, that in and of itself might make this venture worth it.

4 years, 5 months

PDP-11 based Data Translation system on ebay

by dj.taylor4＠comcast.net

Many of you have seen this on ebay already:? item 224117176901 I'm on the east coast so it is out of my reach. It appears to be a complete Data Translation data acquisition system including the software!? Someone please rescue this! Doug

4 years, 5 months

HELLO WORLD! in SEL 810 mnembler

by mooreericnyc＠gmail.com

https://youtu.be/zXcFS4NnFaI 3 minutes of condensed late 60s microcomputing for your weekend.

4 years, 5 months

DEC VRE01 terminal documentation

by woolfson＠telswitch.com

Here's a photo of one of the restored PLATO terminals (which had the plasma display) Does the power supply for the PLASMA look like the one in this photo of one of the terminals with the covers off? ----- Original Message ----- From: Aaron Woolfson To: paulkoning at comcast.net ; uban at ubanproductions.com ; cctalk at classiccmp.org Sent: Thursday, August 13, 2020 1:50 PM Subject: Re: DEC VRE01 terminal documentation Hi Tom. Thanks for your message. Well, the Plasma panels use a pretty unique. I'm attaching the precise waveforms that the Plasma Panel expects to see in order to achieve the illumination of the dot. And while this may not be exactly or precisely what you're looking for, this will explain much about the technology involved. The fact that you can see any illumination at all is perhaps the most important part - beacuse the gas is probably there, and the "actuation" voltage might just not be high enough, or the sustainer voltage might have an issue. The power supplies were manufactured by Electro Plasma and were typically separate from the actual unit itself. I am going to see whether I can find the schematics for those power supplies, which discuss the characteristics . Also, check to see whether the back of the plasma panel itself has an edge connector that is similar to the attached TYCO specified connector. That might give you some insights into where to go. When I gave all my equipment and test gear to the LCM up in Seattle, I am pretty sure that they also got a lot of the original manuals and notes that had been hand written. But I typically had scans of most everything. I will see what I can find.... ----- Original Message ----- Subject: Re: DEC VRE01 terminal documentation Date: Thu, 13 Aug 2020 16:38:39 -0400 From: Paul Koning <paulkoning at comcast.net> You may want to see if the PLATO terminal documentation is any help, look on Bitsavers under University of Illinois. Those plasma display power supplies are hairy devices; the panel is actually a memory device and the power supply produces a high voltage AC waveform to make that work. Those panels normally light up around the rim; the fact you see that briefly but not sustained gives some hope that adjusting may be all that is needed. That's quite a display; the usual plasma panels were 8 inches square, 512 by 512 pixels. I'm guessing this is a 1k by 1k pixel display, which I have seen once or twice, at SAI in San Diego in some military displays. I know a plasma terminal expert; I've forwarded your message to him. paul > On Aug 13, 2020, at 3:23 PM, Tom Uban via cctalk <cctalk at classiccmp.org> wrote: > > I have a DEC VRE01 terminal that I bought NIB years ago. For those who don't know about this model, > it has a flat plasma (orange/black) display of about 17". It worked when I bought it, but now, years > later, I tried powering it up and the light comes on for a moment and goes out. I suspect a power > supply issue, but bitsavers does not seem to have this one. > > Does anyone have schematic (or other) documentation for it? > > --tnx > --tom

4 years, 5 months

Circuit board trace repair...

by wh.sudbrink＠verizon.net

Hi All, I'm going to be attempting to repair, both cosmetically and operationally, a circuit board that had a strip of 12 volt trace "blown off" of it by a short. The fiberglass is clean and there was no solder resist in the affected area. I'm considering using 3M 1183 adhesive tinned foil tape for the job. Has anyone else done this? Could you recommend this or another product? Any tips? Thanks, Bill Sudbrink -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

4 years, 5 months

Card edge connectors for individual Qbus wings

by ce.murillosanchez＠gmail.com

Greetings, everyone... Does anybody know where I can source card edge connectors (with eyelets or pins on the other side, hopefully) that would fit individual wings in a Qbus board? Carlos.

4 years, 5 months

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test-drb August 2020