test-drb September 2005

test-drb@ccmp.vtda.org

212 participants
437 discussions

WTB: Tower case for IBM model 80, 60 or 65 (PS/2)

by dwight.elvey＠amd.com

Hi Another option on the auto transformer is to use the primary of a transformer that was designed to be configured for both voltages. You just ignore the output leads. The transformer in this case only needs to be rated for 1/2 the power that you are sending to the final device. It should be noted that in der Mouse's diagram, each transformer needs to be rated for 1/2 the power. Dwight >From: "der Mouse" <mouse at rodents.montreal.qc.ca> > >> A crude method is to find three biggish AC power transformers all the >> same. Hook all three secondaries together in parallel, then use one >> of the primaries as the primary and hook the other two secondaries >> series-aiding to make the 220 volt 'secondary.' > >Just watch your phasing; get the leads swapped to one of the "other >two" transformers and you'll get (nominal) zero voltage instead of >double voltage. > >Indeed, you can do something autotransformerish with only two >transformers: > > ---------------------. >IN | > --------+------------|------------------------------- > | +----+ OUT > | | | +------------- > | | | | > |_()()()()()_| |_()()()()()_| > _==========_ _==========_ > | ()()()()() | | ()()()()() | > | | | | > +------------|----+ | > +-----------------+ > >Of course, the three-transformer version produces double voltage that's >isolated from the input, whereas the above doesn't. Also, you still >have to watch the phasing; get a winding's leads swapped and you get >zero voltage instead of doubled voltage. > >/~\ The ASCII der Mouse >\ / Ribbon Campaign > X Against HTML mouse at rodents.montreal.qc.ca >/ \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B >

18 years, 9 months

Some more free manuals + some cheap ones

by birs23＠zeelandnet.nl

I found some more free stuff : - Dataproducts SPG8020-1/2 Impact Matrix Printer Owner's Manual - Digital Controls DCC 9000 SCSI Switch Owner's Manual - IBM 5291 Models 1 and 2 Display Station Operator's Guide - Quarterdeck manifest Also have some more manuals for sale for 1 euro a piece : - TRS-80 Micro Computer Technical Reference Handbook - Datapoint 8603/8605 Processor Product Specification and Hardware Reference Manual - Micom Micro800/2 Data Concentrator M822, M824, M828, M8212, M8216 User's Manual - HP RTE-A Primary System Software Installation Manual (still shrinkwrapped, loose pages, needs binder) - HP Manual Update RTE-A Driver Reference Manual, Update Number 4 - HP Manual Update RTE-A Utilities Manual, Update Number 3 - HP 2930 Series Printers Owner's Manual - Micro Mint DISK-80 Expansion Interface Owner's Manual and Assembly Instructions - Digital VMS System Manager's Manual VMS 5.2 ------------------------------------------------------- http://www.oldcomputercollection.com

18 years, 9 months

Free : IBM 5291 Model 2 Display Station Maintenance Library

by birs23＠zeelandnet.nl

Free for postage the manual : "IBM 5291 Model 2 Display Station Maintenance Library". Productnr is SY31-0667-1 Item is located in the Netherlands. Stefan. ------------------------------------------------------- http://www.oldcomputercollection.com

18 years, 9 months

Scanning

by Watzman＠neo.rr.com

Re: > 1) Things that are mostly schematics. > > 2) Things with a large text component that I might want to try to OCR. > Questions: > > a) What resolution should I use for these two things? For OCR, it may depend on the OCR software, but for almost everything I have found that 300 dpi and gray-scale (8 bits per pixel) JPEG works best. Grayscale is definitely better than black-and-white (1 bit per pixel) for reproduction that is indistinguishable from the original, but for some OCR software, black-and-white line art (1 bit per pixel) may work better.

18 years, 9 months

DEC dispersal

by James＠jdfogg.com

> Well, I have written a couple of times about the company next > door getting rid of their DEC equipment and prints. The > carnage has begun. Where is this?

18 years, 9 months

Westinghouse PC1100 PLC Programming software?

by ntec＠btconnect.com

Hi, I am currently working on a project to replace an existing Westinghouse PC1100 plc. I was wondering if you have the PLC programming software to enable me to open the customers Program CD copy. This would allow me to easily convert the program. Would you be so kind as to point me in the right direction. As I am just about to give up? Best Regards Stuart Matthews Ntec Solutions 01753 528321

18 years, 9 months

WTB: Tower case for IBM model 80, 60 or 65 (PS/2)

by jpero＠sympatico.ca

No need for hd but need the HD rails, floppy drives and power supply. I have the model 80 motherboard waiting for a case. If someone wants the 220AC only PSU for industrial 80/60/65, feel free to take it. PSU is a big restangular passive cooled with screened cage cover. I was advised that to change this 220VAC unit to 115VAC would not work even I knew what exactly to do just install voltage doubler circuit. Cheers, Wizard

18 years, 9 months

For those of you looking to match DEC paint colors

by mcesari＠comcast.net

Saw this link in an article on alt.sys.pdp10 -- http://www.hp-store.com/PD_08449.aspx Hopefully still useful.

18 years, 9 months

[Fwd: VAX 11 -750 rescue in the Chicago area]

by tponsford＠theriver.com

posted from the netbsd-vax mailing list -------- Original Message -------- Subject: VAX 11 -750 rescue in the Chicago area Date: Wed, 21 Sep 2005 20:13:33 -0500 From: Stan Johnson <stan.johnson at gmail.com> Reply-To: srj at pobox.com To: port-vax at netbsd.org Hi all In July I posted trying to sale a VAX 11/750. I've had several people try to buy the machine, but the sales have fallen thru for various reasons. I originally thought I had to have the machine sold and gone by the beginning of aug, but I got an extension to the end of sept. for the storage space. Unfortunately the sale that was suppose to move the machine last weekend has seems to have died. If I don't hear from the buyer by tomorrow, I ll need to find someone else to take the machine. So I am starting now since I am running out of time. After my original post several people said I was asking too much money (~$500), but other people seemed to be interested. Is there anyone that can pickup a VAX 11/750 at a location ~40 miles west of Chicago this coming weekend? If you can pickup the machine this weekend it is yours. Pay me what you think the machine is worth, and if you have to spend the money on a truck to transport the machine instead, then so be it. I really want to see the machine saved. Let me know ASAP. If I get no responses by Friday, I'll have to make arrangments to have it hauled away for scrap on Monday. It has to be out of the storage space by Monday evening. Following is a list of what is included. Thanks again for your time, sorry for the short notice........ stan johnson Here is what is included; VAX11-750 including ......Full Set of spares, front panel down to the power supplies, ......Print Set,

18 years, 9 months

Elephant Memory Systems tribute page

by vcf＠siconic.com

http://home.comcast.net/~kevin_d_clark/ems/ -- 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 ]

18 years, 9 months

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test-drb September 2005