test-drb September 2001

test-drb@ccmp.vtda.org

256 participants
661 discussions

by fernande＠internet1.net

Free + shipping costs -Teac 1.2meg 5.25" floppy drive -DOS Customized, by David Busch.... it's a Brady book, nice shape -Simpson Microamperes round gauge, maybe 2.5", glass loose, 0 to 200 Microamps, direct current, fairly old... neat, but I don't know what to do with it :-) -Seagate ST-4053 with microchannel controller, drive needs to be low-leveled, but I don't know how. it's from an IBM Model 60 -full height bezel for Seagate ST-225, from a XT or PC -5.25" half height mounting bracket for IBM optical drive, 74F8785, from an external IBM drive case Model 3510, but I think it'll fit into a Model 77. -Power supply, it's from a piece of VME scrap I bought on Ebay, it wasn't what I thought it was, so I am recycling it. I figured someone might want the power supply. It's an ACDC Electronics unit. will do 5volts at 20 amps and +-5 volts at 2 amps. Has 3 output blocks (sets of terminals at +-5 volts) and a larger pair that must be the 12 volts. Huge heat sink. Model RT101-3 115VAC input. It's about the size of an AT power supply, but with the heatsink sticking out... no fan. Please reply privately. Thanks, Chad Fernandez Michigan, USA

23 years, 12 months

Yet Another Board Cleaning Thread

by jss＠subatomix.com

Well, all, it's time for me to clean boards for the first time. After doing a practice run on a nonessential board, it will be time to begin on the KA11 and friends found inside my PDP-11/20. I've done some research already, but several questions remain. I'd like to get answers to them and have some comments over my tentative cleaning methods. First, let's talk about fluids. It's been a while since I took a chemistry class. Questions: * Is there no difference between 'isopropanol', 'isopropyl alcohol', and 'propan-2-ol'? * Are there any better fluids (methanol?) for certain situations? * Can I find these at a hardware store? * Is there anything I should look out for when using those fluids? That is, is there anything (glue?) they can damage? My most important question deals with core stacks. Most of the board cleaning info I've found steers clear of core. This is unfortuante, as my core is not immune from dust and grime. What I have are H207s, each consisting of a quad-width G616 and a smaller G617 daughterboard. The small space between these boards is exceptionally dirty. My current plan for cleaning them is: (0) Leave the two board assembleds; disassembly would likely cause breakage. (1) Blow canned air over the assembly and through the inter-board space. (2) Dip and swish the assembly in isopropyl alcohol. (3) Blow air over the boards with an unheated hair dryer or more canned air. (4) If the assembly is still dirty, go to step (2). I've got more cleaning subjects to learn about, but in the interest of keeping the discussion more focused, I'll ask about them later. As always, I'm extremely grateful for all help that comes my way. -- Jeffrey S. Sharp jss(a)subatomix.com

23 years, 12 months

PDP 11/34 work party

by KenzieM＠sympatico.ca

Well this is the weekend that I'll try and get the PDP 11/34 running as well as the AS400's in the garage. Anyone who will be in the Ottawa area is welcome to come and help. I'd like to see some signs of life before packing the magnetic media into the basement for the winter. Mike Collector of Vintage Computers (www.ncf.ca/~ba600)

23 years, 12 months

Who neded that DEC BA440 power supply?

by fernande＠internet1.net

I deleted your email. Did you find one? I have an extra, from a R400X, but am not sure how to test it. Would $20 plus shipping be appropriate? Chad Fernandez Michigan, USA

23 years, 12 months

Stupid Powersupply question

by healyzh＠aracnet.com

Subject says it all. If I've got a StorageWorks shelf with a 150W Powersupply, I don't draw 150W do I? I simply draw the sum of the number of disks in the shelf. Trying to see if I've got this down right as I need to add some disks and the cost of power is going up again. Zane -- | Zane H. Healy | UNIX Systems Administrator | | healyzh(a)aracnet.com (primary) | OpenVMS Enthusiast | | | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |

23 years, 12 months

DEC rack header plates

by mrbill＠mrbill.net

Anybody know a source of DEC rack header panels (the maroon/red ones) with or without logo, or for the black "cover panels"? I've got a maroon/red pdp11 header panel, and a "blank" maroon/red one, but not the black panels to cover the rest of the cabinet.. Bill -- Bill Bradford mrbill(a)mrbill.net Austin, TX

23 years, 12 months

New Finds on the first day of a long weekend

by jrkeys＠concentric.net

Spent most of the day hunting at flea markets and a few thrift stores and this what I have so far: 1. Felt & Tarrant Comptometer missing two key covers but otherwise OK. 2. TI Dataman and manual 3. Several mousepads for that part of the collection. 4. The VMS User's Guide by James F. Peters and Patrick J. Holmay 5. Heathkit Student Workbook on Microprocessors And many more to new to list here yet. Have a fun holiday to all and keep computing.

23 years, 12 months

NOTICE FROM THE LIST HOST -- a vote in favor of limited moderation

by steven_j_robertson＠hotmail.com

>There are three things that need to be corrected on this list: > >- off topic volume is way too high >- we need to eliminate insults, personal attacks, and language that is >obviously intended to offend >- subject lines need to correctly identify the content of the message when >the topic has drifted Personal attacks, insults, and incorrect subject lines are symtoms of the underlying problem which is OT posts. We're all adults here. Let's take it upon ourselves to correct the problem and move forward. It's pretty simle really: 1.) The list "owner" should make rule(s) about how the list is run. 2.) Anyone that wants to participate in the list must follow the rules. That's all... This does not need to be a democratic process. Anyone that doesn't like the rules or won't comply, can start their own damned list. My $.02 SteveRob _________________________________________________________________ Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp

23 years, 12 months

symphony for dot matrix printers

by acme_ent＠bellsouth.net

> From: jkunz(a)unixag-kl.fh-kl.de > To: classiccmp(a)classiccmp.org > Don't forget pen plotters hamering the pen down on to the paper, sirring > steppers, ... > load and unload of removable media (MOD, ...) > and the pumps of the water cooling... > modems and acoustic couplers > beepers (in terminals) > typing on a keyboard (with micro switchs) > power and other switches > start up sounds (Apple, SGI) > opening and closing enclosures > roling enclosures (with wheels) around Thanks for these very fine suggestions! I can also use the tape-loading sounds from my ZX81 and TS2068! Glen 0/0

23 years, 12 months

Unibus/QBus boards available FT

by mrbill＠mrbill.net

I dont currently have a system that I can use these in, so I'd like to trade them for LSI-11 stuff, DEC rack pieces/parts/header panels, or ham radio-related equipment. If you can help me ID the couple of boards I couldnt find in the field guide, please do. H215 (core! qty. 2) 8-Kword 18-bit (parity) (used in MM11-LP, ME15) M7850 Parity board for G651, MS11-EP/FP/HP/JP M920 (qty. 2) UNIBUS connector G727A Grant continuity card G231E (Qty. 3) 16K XY Selection, Current source, Address Latch, 8K Decode. G109 ("CONTROL AND DATA LOOPS" ?) ???? ("16K MOS UNIBUS MEMORY") M9760 ? M957 ? bill -- Bill Bradford mrbill(a)mrbill.net Austin, TX

23 years, 12 months

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test-drb September 2001