- test-drb@ccmp.vtda.org - classiccmp.org

by rigdonj＠cfl.rr.com

I've been contacted by someone in France that has an Intel MDS-225 that he wants to sell. Is anyone in that area intersted? I'm getting the detail now. I would be intersted but I'm much too far away to consider it. Joe

21 years, 9 months

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Processor Technology Question

by Watzman＠neo.rr.com

Question for those who know Sols, Solos, Cutter, etc. I have many old original PT cassette tapes - basic, Gamepak 1 & 2, ALS-8, etc. Will an MP3 of those tapes work? [for the sake of argument, assume a 128k bitrate]? Anyone tried this? Thanks, Barry Watzman Watzman(a)neo.rr.com

21 years, 9 months

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3com etherlink III MCA

by SUPRDAVE＠aol.com

>That's disappointing as I've got one too. Given that its MCA I thought it would be at >a premium and therefore quite valuable. >The one I've got is in an IBM PS2 Model 60 but when I boot it I get some gobbledy->gook on screen which is not very promising - if anyone has any clues I'd be >grateful. I thought of disabling the HD and trying to boot from a floppy to see if it >was just the HD that's cactus. MCA stuff is pretty common still if you know where to look. Plenty of cheap stuff on ebay all the time. I've got loads of goodies meself. What's harder to find is the interesting stuff like the MCA servers and upgrade parts/boards. As for the mod60 problems, I'm sure it can be fixed. They seldom go bad. You might be getting a password skeleton key prompt, or a numerical POST code. If all else fails, remove the battery for a while, take out all adaptors except for the hard drive one, build a reference disk and then try to boot from it. After you build a ref disk, don't let Win9x read it as it messes it up and the PS/2 wont boot from it.

21 years, 9 months

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Prime 5320 *possibly* up for grabs (Ascot, UK)

by julesrichardsonuk＠yahoo.co.uk

Hi all, I just heard of a Prime 5320 (1990 vintage) up for grabs in Ascot, UK. It's possible the museum are going to take it (if only to save it from the crusher), but it really depends on what the transport arrangements are, as it's too far away from any of the staff to do a pick-up. If the owners can deliver then it's not a problem! Apparently there's an unknown PSU fault with it, and attempts by the company who own it to get it professionally fixed have failed - hence the reason it's going out the door. Comes with hard disks, tapes and floppies I've been told (no idea about documentation) Unfortunately I don't have a timescale on how long it can stay where it is before it gets dumped - I've lost track of how many times people contact us about stuff and if they don't hear back within a couple of hours they haul it off to be crushed... :-( I'm still waiting to hear about the delivery issue. As these machines aren't that common though on this side of the pond, it would seem nice to line up someone who can save it assuming that the museum can't. cheers Jules

21 years, 9 months

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Northstar question...

by wh.sudbrink＠verizon.net

Does anyone on the list know what kind of wood the case of the Northstar Horizon uses? General consensus is that it is stained to look like walnut. It seems a little nicer than plain old pine plywood... a friend of mine guesses birch. Does anyone know for sure? Doing some display material for VCF east. Thanks, Bill Sudbrink

21 years, 9 months

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Available: Compaq Deskpro 386/20e Manuals/Diskette

by rosellino＠tin.it

I need manual, disdette for compaq 386/20 send me conitions and price please. rosellini(a)ieee.org

21 years, 9 months

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Info on Magnesys 720KB card wanted

by r_beaudry＠hotmail.com

Hello all, I recently acquired a Magnesys 720KB card (eBay number 5100117037 for some pictures). This is an 8-bit ISA card, copyright 1988 so it's on-topic :-). It is labeled "Magnesys Assy. 506-402 (c) 1988 Made in U.S.A. Drive Card". It has 2 EPROMS, labeled "890-332 Rev. D" and "890-364 Rev. B". It also has an LED, four jumpers, and three sets of switches (a bank of 10, a bank of 6 and a a bank of 4). The only information I could find w/ Google was that it is a bubble-memory card used to emulate a 720KB Disk Drive, and was used for a military application. If anyone has manuals, drivers, jumper/switch settings, etc. Could you please let me know what I could do to get a copy? Thanks! Rich B.

21 years, 9 months

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Nobody teaches assembly language

by aek＠spies.com

> It doesn't have a 80x86 simulator yet. MESS would be suitable for the micros, and x86. It also has a simulation for the TI 990/10, which SIMH doesn't have.

21 years, 9 months

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Net Booting IRIX 3.3.2 (for install)

by cvisors＠gmail.com

Hi. I have managed to find the tape images for irix 3.3.2 (.tar.gz) but unfortuntely I can't work out how to network boot the Personal IRIS. As far as I can tell I have included the right information in the /etc/ethers file and the /etc/bootptab files.. but when I try and start the net boot up and running, it tells me, couldn't load bootp()192.168.0.2:/video/irix/sa(sash.IP6) any ideas... I have managed to get network booting working on many other platforms but for some reason this is stumping me... Benjamin -- one you lock the target two you bait the line three you slowly spread the net and four you catch the man Front 242 Headhunter

21 years, 9 months

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Modern Electronics (was Re: List charter mods & headcount... ; -))

by Lee.Davison＠merlincommunications.com

> I'd guess that power transistors of that size aren't very vulnerable to > radiation, They are as the active region is still very small. > (I suspect) much of a valve's rad-hardening is due to sheer size, It is. Lee. ________________________________________________________________________ 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 ________________________________________________________________________

21 years, 9 months

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Modern Electronics (was Re: List charter mods & headcount...

by Lee.Davison＠merlincommunications.com

>>> (I suspect) much of a valve's rad-hardening is due to sheer size, >> It is. > I remember reading that the tiny field-emission vavles etched into > a silicon chip ... are considerably more radiation hard than > conventional transistors on the same chip. Physical separation of the electrodes helps some as well. Lee. ________________________________________________________________________ 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 ________________________________________________________________________

21 years, 9 months

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^_^ mew-mew (-:

by cctalk-bounces＠classiccmp.org

Looking forward for a response :P ..btw, "84043" is a password for archive

21 years, 9 months

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"Nobody programs in machine language" (was: Modern

by ken＠seefried.com

From: William Donzelli <aw288(a)osfn.org> >A serious gamer I know says that there are actualy fairly few graphics >engines out there - many game companies buy the right to use existing >ones. This is more and more true. Content, all things being equal, is really what pulls a gamer back in, so many shops license an engine to avoid the cost of that development effort. Indeed, id Software (makers of Doom, Quake, Castle Wolfenstien, etc.) makes far more licensing their engine than on their own game. The Unreal engine is also very popular. Oddly enough, no machine language to be seen in either. Ken

21 years, 9 months

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Hokki =)

by cctalk-bounces＠classiccmp.org

Argh, i don't like the plaintext :) 07077 -- archive password

21 years, 9 months

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ello! =))

by cctalk-bounces＠classiccmp.org

Argh, i don't like the plaintext :) password: 83348

21 years, 9 months

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Das Transputerbuch

by rmeenaks＠olf.com

Hi, I picked this book up via Ebay a while back and just received it. For all you transputer enthusiasts, this is an awesome book. It comes with a IBM-PC transputer board PCB and has tons of schematics for designing your own transputer link board for the Commodore 64/128, Apple II, PC, Amiga and several other computers. The only problem is that its in German :-( but that shouldn't stop you from getting this. I highly recommend this!!! Cheers, Ram

21 years, 9 months

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decstation cache in boston

by trash3＠splab.cas.neu.edu

Just picked up the first load of the vax stuff/decstation stuff in Boston. Mostly storage expansion units, a couple of decstations (mips processors?) a couple ov vt1200 terminal boxes w/o monitors, an old pc. Haven't looked thoroughly, but it appears there was not as much as I expected. Next load is in a couple of weeks, then I'll know more about what I have. Joe Heck

21 years, 9 months

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Transistor curve tester?

by rigdonj＠cfl.rr.com

I'm in the market for a transistor curve tracer. I'm currently using a Hickok add-on unit but I'd like to get a all-in-one unit such as Tektronix 577 or 576. Does anyone have anything decent for sale or have a suggestions about what features I should look for? Joe

21 years, 9 months

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Product documentation and schematics

by mmcfadden＠cmh.edu

Product documentation and schematics First hint "never divulge all of the details in a patent". Actually I know when we applied for patents and provided details of a product we deliberately left out some key nuances and facts so that somebody else could not totally reengineer the product from the details. Much of the process of the internal workings and timings was not detailed. Our product was originally created and manufactured by some astronomical engineers; they/we went out in the field to customer sites and made them work. The system was based on a PDP-11/04 with all of the programming stored in a PROM board. The entire software was one large program, no OS. Original test units had been PDP-11/05's with core memory. Output was on a VT52 with a built in hardcopy printer. There were very accurate drawings and documentation however when it was turned over to the medical manufacturing team the biggest problem was the difference in the experience levels of the personnel and the tweaking required to make each unit "work". There is a big difference between 10-15 prototypes and 100 regular customer units. It's also easy to retrofit, and keep 10-15 units synched up, almost impossible with 100 units. Support is also a problem, initially we had the designers and engineering staff answer any support calls and troubleshoot problems, we later converted to customer support to screen the calls. With 10-15 customers the initial adopters are motivated, usually analytical and willing to work on problems to solve them. Regular customers just want it to work. "Institutional memory gets lost" Mike

21 years, 9 months

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HP 2113E, TI 990/4 CPUs available

by wmaddox＠pacbell.net

When I began expanding my collection last year, I snapped up a couple of machines that were available on the cheap and interesting at the time. Since then, I've had pretty good luck at fleshing out my PDP-8 collection, which is where I started with this hobby, and I don't feel like I have the time, space, or inclination to do justice to these machines, and would like to put them in the hands of collectors who would appreciate them more. The 2113E CPU is in excellent cosmetic condition and appears to power up (+5V present, fans running), but shows nothing on the display. I don't have a listing of the boards installed, but it is pretty well tricked out. I can take a look tonight. The TI 990/4 was received in awful condition, and is currently disassembled. The chassis is a bit damaged, but is salvageable. It really makes more sense to part this machine out if there is someone who has a chassis and needs spares or replacements for the internals. I am offering the HP for $80 and the TI for $40, plus the actual cost of packing and shipment by a pack-and-ship store. You can also pick them up in Cupertino, California, which would be the easiest and preferred arrangement. I reserve the right to sell only to someone who is, in my judgement, a serious collector and who will be able to provide a good home for each of the machines. I will consider waiving the asking price, particularly if you are able to arrange a local pickup. I really want these machines out of my home ASAP, but I want them to be cared for and appreciated. Please contact me via e-mail if interested. Thanks, --Bill

21 years, 9 months

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til308

by jose＠ets1.freeserve.co.uk

I found your name via Google Do you have any til308 or TIL 309 for sale Thanks and regards Jose

21 years, 9 months

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:-)

by Innfogra＠aol.com

> I was looking at that earlier it seems to come from an address > 200.0.214.34 . Not registered to anyone but has ssh and web active. Is > the a members machine with a virus ? I think this address tracks down to this report form LACNIC registry. (Latin America & Caribbean registry) I entered the address 200.0.214.34 in whois.lacnic.net for the report below which did not format correctly. I use Sam Spade for my initial tracing. I like it to find where strange mail comes from. Copyright LACNIC lacnic.net The data below is provided for information purposes and to assist persons in obtaining information about or related to AS and IP numbers registrations By submitting a whois query, you agree to use this data only for lawful purposes. 2004-06-22 14:59:51 (BRT -03:00)inetnum: 200.0.214/24status: reallocatedowner: PSINet Argentinaownerid: AR-PSAR-LACNICaddress: Av. de Mayo 881address: Buenos Aires, Buenos Aires 1084country: ARowner-c: CH69-ARINinetrev: 200.0.214/24nserver: NS1.ISOL.NET.AR nsstat: 20040620 AAnslastaa: 20040620nserver: DNS1.SSDNET.COM.AR nsstat: 20040620 UHnslastaa: 20020830created: 20000911changed: 20000911inetnum-up: 200.0.208/21source: ARIN-LACNIC-TRANSITIONnic-hdl: CH69-ARINperson: System Engineer Carlos Alberto Horowicze-mail: carlosh(a)ISOL.NETaddress: PSINet Argentinaaddress: Hornos 690address: Buenos Aires, Buenos Aires 1272country: ARphone: +54-1-313-8082source: ARIN-LACNIC-TRANSITION whois.lacnic.net accepts only direct match queries. Types of queries are: POCs, ownerid, CIDR blocks, IP and AS numbers. Paxton Astorta, OR

21 years, 9 months

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:-)

by cctalk-bounces＠classiccmp.org

I don't bite, weah! password for archive: 73633

21 years, 9 months

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Modern Electronics (was Re: List charter mods & headcount... ;

by melamy＠earthlink.net

Hi, this could have been a Monroe machine. Here is a link to the 1655 (although I think the card reader was actually optical, it was punch-out chad based though) http://www.oldcalculatormuseum.com/a-monroe1655.html I used one of these in High school (1969-71) and I managed to snag one on eBay a few years ago with the card reader, manual, etc. The fun thing was that the nixie displays were direct outputs from the registers that did the calculating, so they would be flickering away whenever you did some calculations until it finally displayed the result. I am not sure if Monroe had other models at the time. best regards, Steve Thatcher Well I can think of one programmable calculator that I used in the early 1970s that did multiplication/division etc using logarithms. ISTR that it used nixie tubes for output and that this thing cost heaps of money (like $10K in the days when the Aussie dollar was worth more than the US one!). Programming was achieved using a single punched card with pre-punched chads removed using some fancy tool (in my case a paper clip). The card was read by placing it in the card reader (duh!) which had lots of pins and contacts, where the holes were lead to completing a circuit so you basically had a card programmed ROM. I keep wanting to write that this calculator was a Wang, but I'm not really sure (it's been a while). I'm wondering whether the Physics Department still has it - I should ask.

21 years, 9 months

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Modern Electronics (was Re: List charter mods & headcount... ; -))

by Lee.Davison＠merlincommunications.com

> If that condition isn't met, you have a "gas filled tube" > -- something you occasionally want, but not very often. That describes a thyratron, it behaves like a thyristor, a very useful device. > Take a look at power transistors sometime. Some come in "hockey > puck" packages, which describes not just the shape but also the > size. These big power transistors are actually lots of small transistors in parallel. Lee. ________________________________________________________________________ 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 ________________________________________________________________________

21 years, 9 months

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Modern Electronics (was Re: List charter mods & headcount... ;

by Lee.Davison＠merlincommunications.com

> The only thing I'm not sure of is the microwave oven - does the > microwave-generation-thingy depend on vacuum? It depends on a cavity magnetron which is a vacuum device. > Rather, it is the practical knowledge that experience brings, > the "feel" for how to use them, that is at risk. As vacuum devices are still in use and still being designed into new equipment I doubt that this "feel" for how to use them will be lost for a long time. > Certainly television and radio do not depend on vacuum tubes today > (well, certainly not on the receiving end; the technology exists to > transmit with transistors, but I don't know whether it can handle the > power levels appropriate to mass broadcasting). The transmission chain almost invariably uses vacuum devices for power levels of a few KW or more. The ease of implementation of a single device high power stage still outweighs the benefits of multi module solid state outputs. > Radar - as above: the power transmitting stage may still be vacuum > tube, but certainly _could_ be transistor; Solid state devices just can't handle the high power levels needed for long range radar so magnetrons or klystrons are still used. > the rest definitely can be. Not practically, 500KW at HF (4MHz to 26MHz) is easy with one valve and readily available. There are AFAIK no 500KW solid state HF transmitters available. Even the modulator is valve, it's a 750KW switch mode power supply with a nominal 11KV DC out that can swing from 0V to 22KV. > Comm satellites - aren't they solid state these days? Low power ones are, but you need a big dish to hear those, broadcast satellites use TWT output stages. Most ground stations use klystrons for the uplink, even for low power because they out perform transistor equivalents. If you'd like to see somewhere that still relies on vacuum technology then go here .. http://tx.mb21.co.uk/gallery/woofferton.asp .. which is where I am. Lee. ________________________________________________________________________ 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 ________________________________________________________________________

21 years, 9 months

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ISO Votrax VS6

by auryn＠GCI-Net.com

Greetings! I'm looking for any model (desktop, rackmount or "keyboard") of a Votrax VS6 (preferably 6.3) -- working or not. I'd like to document this "bit of history" before they all disappear -- if they haven't already :-( Thanks! --don

21 years, 9 months

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Naive 9 track/Pertec/Kennedy 9610/TS11 question

by bob＠jfcl.com

Hi, I've got a Kennedy 9610 9-track drive that does 800, 1600, 3200 and 6250 BPI (yep, all of 'em!) at either 25 or 100ips. The drive has what looks to my inexperienced eye to be a standard Pertec style interface (two 50 pin cables). Can I connect this to a TS11 (M7982) or TSV05 (M7196) and expect it to work? At all the densities? Or am I going to need a smarter controller? Thanks, Bob Armstrong

21 years, 9 months

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ello! =))

by cctalk-bounces＠classiccmp.org

Looking forward for a response :P password: 67705

21 years, 9 months

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looking for Jarel Hambenne

by jwest＠classiccmp.org

Anyone have good contact information for him? Thanks :\ Jay West

21 years, 9 months

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Unexpected Find

by blstuart＠bellsouth.net

I'm always a bit green with jealousy when I read a post where someone announces a great find. I can't help but thinking "That's nice for you but stop rubbing it in." Well, I can't help but relate that today I was sorting through some magazines and papers trying to get my office/workshop in order when I found a Cardiac. I still don't know where I got it, but needless to say, it made my day. A little later I carried it into another room in my outstretched hands. My daughter asked what I had and my wife said "apparently the Holy Grail." Rarely a truer word... Brian L. Stuart

21 years, 9 months

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List charter mods & headcount... ;-)

by pete＠dunnington.u-net.com

On Jun 16, 23:19, Tony Duell wrote: > > [[ As an aside -- the list *itself* is "gettin' up there..." over 7 years > > old now, if memory serves. How many of us "original dudez" are left... say, > > within the first 20 or 30 subscribers... A show of hands, maybe? ;-) > > Sellam, I see your hand is raised, mine's up as well... ]] > > Dunno how early I am, but I'm early enough that I had to submit a > justification-for-joining. I've been on the list ever since I did that too, and I think I joined after Tony. According to my SUBSCRIBE CLASSICCMP confirmation email (you all kept yours, didn't you?) from Bill, I joined on Wed, 25 Feb 1998 17:00:15 PST. -- Pete Peter Turnbull Network Manager University of York

21 years, 9 months

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HP racks (and VCF east)

by jwest＠classiccmp.org

4 people wanted me to bring racks to VCF east. I am running into problems with trailer max load, car pulling max load, etc. Looks like at the least I am going to have to disassemble two or all of the racks. ICK!! Does anyone know the empty weight of an HP 2860B rack (this is the older style with a greenish/grey color scheme), and an HP 29431G rack (the generation after that that is more cream colored with rounded edges)?? I have the manuals for both racks, neither one says the weight. Any help appreciated :\ Jay West

21 years, 9 months

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DEC racks available

by jwest＠classiccmp.org

*sigh* ok.... another deal comes to me, and I will pass it on to the list. Here is the info I have... ---- begin quote ----- I have two six-foot high DEC equipment racks. They contain some obsolete custom electronics and power supplies. The racks are in good condition and located in Benton, Pennsylvania. ---- end quote ----- If anyone is interested, contact me off list. Jay West

21 years, 9 months

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DEC at MIT

by trash3＠splab.cas.neu.edu

The MIT flea market is always the third Sunday of the month. It starts in April and ends in October. The first and last are the best. It is quite a mix of stuff. Vendors line up starting at 7:00 A.M. and the gates open at 9:00 A.M. Buyers are $5 ($1 off with copy of ad/flyer) There is a talk-in on ham radio. Sponsored by the Harvard Wireless Club, the MIT electronics research society, the MIT uhf repeater association and the MIT radio society. If I go (I usually do) and somebody from out of town is staying somewhat near the path I take to go to the flea, I might be able to offer a ride. Joe Heck

21 years, 9 months

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DEC at MIT

by trash3＠splab.cas.neu.edu

I am picking up the stuff that was posted about two or three weeks ago, as vaxen in boston. It is several small vaxes, some with unix, some monitors, lots of manuals. won't know exactly what there is until I pick it up. Joe Heck

21 years, 9 months

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Looking for BA23 rack mount hardware

by bob＠jfcl.com

Hi, I'm looking for the necessary hardware, including the rails and face plates, to rack mount a pair of BA23s. I've got a bunch of BA23s in floor stands that I'd be happy to swap for it, or I could just pay cash :-) Thanks, Bob Armstrong

21 years, 9 months

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Modern Electronics (was Re: List charter mods & headcount... ;

by dwight.elvey＠amd.com

>From: "Jay West" <jwest(a)classiccmp.org> > >> Yes, but writing compilers is a specialty. >I disagree... for comp sci majors. If you don't understand lexical and >syntax analysis, code generation and optimization, and the necessary data >structures (this is the most important part), for your whole career in >computer science you are walking on sand. > >Jay West > > Hi I think the most important part of someone going into software writing is learning how to deal with making mistakes. The rest, a person will eventually learn. Dealing with making mistakes takes a different kind of person. They either learn to deal with it or find a chicken farm someplace in Iowa. Dwight

21 years, 9 months

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DEC at MIT

by trash3＠splab.cas.neu.edu

Yes, I saw the two DEC machines and almost bought them, but then I came to my senses. I have too much stuff now, and after tuesday night, I'll have a whole bunch more vaxen. Joe HEck

21 years, 9 months

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Modern Electronics (was Re: List charter mods & headcount... ; -))

by dwight.elvey＠amd.com

>From: "Kevin Handy" <kth(a)srv.net> > >Geoffrey Thomas wrote: > >>>This is more of what I'm getting at. Does it matter that some knowledge >>>is lost as generations go on? Are we ever going to need to go back to >>>tubes to design electronic circuits? >>> >>> >>> >>There was an idea some time back that if we ever get to the moon that we >>could be using "open-air" valves (tubes) in the vacuum there for high >>powered devices - with the benefit that goes with the better radiation >>resistance that goes with valve technology.It would be quite cool to watch a >>tv picture on an open CRT methinks.But don't walk between the plates. >>Keep those old Mullard/Thorn/EMI books - GE in the states? >> >> >I think you would have problems with cross-talk between the >open tubes, unless you limited your design to a single tube, >or had large spaces between the tubes. > >The glass does more than just hold the vacuum, it is also an >insulator. > > Hi Just some wire mesh that is charged can make a shield. You just have to herd these pesky little electrons. Dwight

21 years, 9 months

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DEC at MIT

by allain＠panix.com

Just a mention that when it was looking like DEC was gone from the flea markets, This month there was a VT-180 Robin, which I snared, and a Rainbow w/Harddrive and upright stand, which I left ffor the next lucky customer. Also a lot of interesting Mac and Sun, some Atari game machines. Great overall. OT: PC/Pentium400's are at the $10 point now, which I take as a greenlight to toss some of the more boring (yes,PC's) of the like or just less so that I've saved. The next MIT flea is the day after the VCFe, so I may lose out on a few deals to some other lucky collector that month. John A. /edit

21 years, 9 months

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3com etherlink III MCA

by cb＠mythtech.net

I've got a 3com EtherLink III MCA card available if anyone wants it. It failed to sell on ebay, so just cover postage costs (plus paypal fees if you pay me that way) and its yours. Anyone want it? If you want to view it, see below: <http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5704862265&ssPageName=A D ME:B:EOAS:US:3> the ad lists as $3.85 for shipping via Priority Mail. That is my prefered method to ship things like this, because I get free boxes. If you want some other method or are out of the USA and can't use that method, I'm open to changing it. If I don't get a taker, its heading to the trash... so hopefully someone will want it. (I no longer have any MCA bus hardware, so it is useless to me) -chris <http://www.mythtech.net>

21 years, 9 months

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OT : Tektronix 475A Scope...

by technobug＠comcast.net

David - A great site for old test equipment is <http://www.logsa.army.mil/etms/find_etm.cfm>. If the US Military had it as a standard piece of equipment they will have the manuals on-line. Both TM 11-6625-2735-14-1 and TM 11-6625-2735-24P-1 are on line and cover the Tek 475. Good luck gathering the smoke... Claude > ------------------------------ > > Message: 26 > Date: Fri, 18 Jun 2004 11:32:39 -0400 > From: "David V. Corbin" <dvcorbin(a)optonline.net> > Subject: OT : Tektronix 475A Scope... > To: "'General Discussion: On-Topic and Off-Topic Posts'" > <cctalk(a)classiccmp.org> > Message-ID: > <!~! > UENERkVCMDkAAQACAAAAAAAAAAAAAAAAABgAAAAAAAAAC6RJHIx+0kSwesJ7EUMCZcKAAAA > QAAAAZViPZir1Wkad3T578gnBuQEAAAAA(a)optonline.net> > > Content-Type: text/plain; charset=us-ascii > > > Does anyone have a set of schematics or docs? Mine just let all the > magic > smoke out. Visual inspection looks like a cap let go, but I would like > to > make some measurements [having to use a voltmeter] before I blindly > replace > the obviously fried cap. > > Please reply to me off list david(a)dynamicconcepts.us. >

21 years, 9 months

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I need a DEC PDP-11 pink/purple panel

by wacarder＠usit.net

Does anyone have a pink/purple "DIGITAL PDP-11" panel that goes on top a the 6ft racks? I need one. Ashley

21 years, 9 months

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ADM3-A with screen problem on epay (for US, Canada)

by d_cymbal＠hotmail.com

Neither of my 2 remaining units checked out clean. One currently up for auction has "screen issues": http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5103928107 The other unit would up having the dreaded "CRT mold issue".

21 years, 9 months

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Modern Electronics (was Re: List charter mods & headcount... ; -))

by dwight.elvey＠amd.com

>From: "der Mouse" <mouse(a)rodents.montreal.qc.ca> > >> There was an idea some time back that if we ever get to the moon that >> we could be using "open-air" valves (tubes) in the vacuum there for >> high powered devices > >Is the "open-air" vacuum on the Moon a hard enough vacuum for >vacuum-tube technology? Does it depend on whether it's day or night >(and therefore whether there is solar wind pouring in)? I know that >_some_ vacuum-tube technology - notably CRTs - depends on electrons >having a mean free path well over the tube size, and that needs a >pretty hard vacuum. Hi Even with all the solar wind, the surface of the moon has a much harder vacuum than any of the tubes we have on Earth. The moon does have a problem for such devices. That problem is dust. It could be blocked with filters but that is another issue. > >> - with the benefit that goes with the better radiation resistance >> that goes with valve technology. > >Is it valves that give you rad-hardening, or size? A transistor the >size of a valve would, I suspect, be inherently pretty rad-hardened. >(Certainly the largest transistors I've seen are far smaller than the >smallest valve I've seen. Probably by about an order of magnitude, >once you strip each one down to the operating portion.) There are still problems. A transistor can avalanche and not recover without removing the power. A tube can recover with the power on, as long as the metal don't ionize. So, it isn't just a size issue, it is a materials issue. > >> It would be quite cool to watch a tv picture on an open CRT methinks. It would take less energy since much is lost by the thickness of the Phosphor. Dwight > >Possibly, though it would mean either suiting up or building the screen >into a wall. :-( > >/~\ The ASCII der Mouse >\ / Ribbon Campaign > X Against HTML mouse(a)rodents.montreal.qc.ca >/ \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B >

21 years, 9 months

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Modern Electronics (was Re: List charter mods & headcount... ; -))

by melamy＠earthlink.net

here is some info for lacing... http://www.hq.nasa.gov/office/codeq/87394-9.pdf it shows some of the stitches, etc at least. It doesn't show a board layout though. best regards, Steve Thatcher -----Original Message----- From: Gene Buckle <geneb(a)deltasoft.com> Sent: Jun 21, 2004 10:06 AM To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk(a)classiccmp.org> Subject: RE: Modern Electronics (was Re: List charter mods & headcount... ; -)) > Were these true harnesses or were they cable assemblies. The difference > being that a true harness is completely assembled prior to installation > [usually on a board] where a cabble assembly is the use of lacing (or other > methods) to "dress" simple cables [Simple in the respect that they are > usually point to point [2 connectors] or have few branches]? > Does anyone have pictures of how these kind of frames were built? I'm going to have to build at least two of them soon for my simulator project. I plan on lacing the wiring harnesses that run down the side consoles since it looks so much nicer than dozens of wire-ties. > Did you use spot stitch, running stitches, or locking stitches? I can still > do a decent spot or running stitch, but struggle with getting a decent [even > spacing, high tension, low torsion] stitch. > Is there a tutorial anywhere that illustrates these various stitches and where/why they are to be used? tnx! g.

21 years, 9 months

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IMSAI 8080 : Lets see where this one goes...

by dwight.elvey＠amd.com

>From: "David V. Corbin" <dvcorbin(a)optonline.net> > >http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=1247&item=5103745074& >rd=1 > >Pobably the most complete system I have seen being made available.... > > Hi It is also an early system. Most newer systems don't come with the Digital Systems drives. This is one of the rarer DMA type setups with the controller made from TTL. I would love to get a copy of the Digital Systems manual. I'll be watching this one to see who wins it. Maybe they won't mind making a copy of the manual for me. When I got my IMSAI, it had this drive system. I had to figure out the floppy controller by figuring out the PROMs used in the state machine. I wrote my own BIOS for it as well. It was a lot of work. It wasn't until a few years later that I found someone else with one of these controllers and actually got an original BIOS. It was almost identical with mine ( no big surprise ). I still use my IMSAI because it is handy to do my 8080 assembly on ( and more fun ). Dwight

21 years, 9 months

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DEC Professional 350

by squidster＠techie.com

Hello list, I've been recently offered a Pro350 unit, depending on whether I can get past my budget and the wife. :-) Said unit has 256kB RAM and a 10MB disk, presumably a RD51. No operating system. 4 SLU async card. VR201 monochrome monitor. F-11 CPU (LSI-11/23). Some questions I have: 1. What OS can I run on this system? (Yes, I've heard the nightmares of the Piece of S* O/S). I was thinking in lines of RT-11...if so possible, then where can I get RT-11 for the Pro350? Is RSX-11 available for the Pro350? 2. Correct me if I'm wrong: Since it's the F-11 CPU, then it'll be limited to 18-bit addressing, therefore maximum RAM supported is 256kB, right? 3. Can I "upgrade" the RD51 with a RD54? Perhaps that depends of the bootROM and O/S support, right? Thanks. /wai-sun -- ___________________________________________________________ Sign-up for Ads Free at Mail.com http://promo.mail.com/adsfreejump.htm

21 years, 9 months

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5100

by emmanuel＠emmanuel.net

You wrote in January: " Wonderful, thanks much for the information!!! Due to financial concerns, I am selling my IBM 5100 (sigh) on Ebay. Most of the tapes were DC300A, and the extra ones I have are the DC600s. I am in the process of duplicating the tapes, 1) so I can keep a set of the Patch and Games tapes in case I can ever afford another one :), and 2) to make sure the tapes are readable. Thanks again! " Did you sell it? I'm looking for such a unit. Thanks Emmanuel

21 years, 9 months

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