test-drb May 2007

test-drb@ccmp.vtda.org

235 participants
483 discussions

by RodSmallwood＠mail.ediconsulting.co.uk

Ooops missed out a step! The cheap hub with the BNC is 10Mbit but its connected to another hub that is a switch ie does both 10Mbits and 100Mbits. Now you can go from BNC (Thin ethernet) at 10Mbs to UTP at 100Mbs Rod Smallwood -----Original Message----- From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of Zane H. Healy Sent: 06 May 2007 17:31 To: General Discussion: On-Topic and Off-Topic Posts; General Discussion: On-Topic Posts Only Subject: RE: 10base-2 to 10base-t media convertor? At 5:18 AM +0100 5/6/07, Rod Smallwood wrote: >Get a cheap hub that has both 10/100baseT and BNC. Mine is a Dynamode >DM-809STP. I use it to convert the BNC output from my VAX to 100BaseT >on my network. How common are 10/100BaseT Hubs with a BNC connection? I know I've never seen one. Any hub I've seen with a BNC connection has been limited to 10Mbit. The original posters problem just happens to be half the reason I even care about 10Base2, my Amiga 3000's NIC only has a BNC connection, I also have this problem with my DECserver 90L+. Though I'm not using either at the moment. Zane -- | Zane H. Healy | UNIX Systems Administrator | | healyzh at aracnet.com (primary) | OpenVMS Enthusiast | | MONK::HEALYZH (DECnet) | Classic Computer Collector | +----------------------------------+----------------------------+ | Empire of the Petal Throne and Traveller Role Playing, | | PDP-10 Emulation and Zane's Computer Museum. | | http://www.aracnet.com/~healyzh/ |

17 years, 3 months

Modifying a Nubus TokenRing card

by teoz＠neo.rr.com

I have 2 of these Asante MacRing (same as TokenRing I hope) NB 16/4 Nubus tokenring cards: http://home.neo.rr.com/unknownk/images/100_1106.jpg Can I solder in some parts (lower right of the card) and use rj45 to connect this card to a TokenRing Hub (when I snag one)? Seems like I need a RJ45 jack, 4 capacitors (same as the ones on the 9 pin jack above?) and a chip marked 78Z003 (what is that exactly)? Oh, does anybody have drivers for this card?

17 years, 3 months

Dayton and RL02's

by charlesmorris＠hughes.net

The following thoughts have just occurred to me: 1) I am going to Dayton next week; 2) I will be driving my car alone, so can haul moderately sized pieces of equipment back home; 3) I have decided to purchase another RL02 drive and disk pack for my 11/23+ (ref. the previous single-RL02-system discussion, this seems to be a good solution to my backup problem). SO - is anyone else going to Dayton who has an RL02 for sale and can haul it there? Please contact me off-list. thanks Charles

17 years, 3 months

PCW 8256 PSU questions

by cclist＠sydex.com

I got the Amstrad PCW8256 yesterday and plunked a CF diskette into it The disk spun and then the screen went dark (no beeps). I pulled my screwdriver out and opened it up. If I disconnect the CPU and check the voltages, I find that the +24v is present, but the +12 reads about 2.5v and the +5 is 0v. I'm not eager to do much with the unit, but I thought I'd give repair a shot before consigning it to the "scavenge and dump" pile. Does anyone have any ideas on what might be wrong or (gasp) even a schematic of the monitor/PSU board? I got the PCW for the disk drive, which, with a new belt appears to work just fine on a PC. Cheers, Chuck

17 years, 3 months

Oddball DC-xxx tape drive

by cclist＠sydex.com

I've got a DC-300-footprint tape drive in my collection of peripherals, circa 1986 (chip dates) for which I'm trying to identify the medium. A DC-300/600 cart fits perfectly and is spun a bit by the drive before the error light comes on. Upon close examination of the drive internals, the surprise is that it doesn't use an optical sensor to determine BOT/EOT, but rather contacts on either side of the read/write head that apparently make contact with a conductive metallic strip on the tape. So the medium isn't DC300, anyone know what it is? The interface is a 50-conductor one, with unit selects from 0-3, but it doesn't seem to be QIC-02 or QIC-36--and it's not SCSI either. The drive has a motherboard with two cards in it--one appears to contain the read/write amplifiers, the other contains a 6803, 6522 and a 6821 and a 2716 EPROM with a 3M copyright sticker. The manufacturer is ADIC, but I'm unable to come up with any documentation on the web for this beast. Cheers, Chuck

17 years, 3 months

That horrible computer foam

by jonas＠otter.se

Mr Ian Primus <ian_primus at yahoo.com> wrote: > As I have been collecting computers, I have noticed > that some pieces of equipment like printers and the > like, contain a lot of this awful foam stuff, most > likely for noise deadening. Time has caused this foam > to break down and turn to gunk, or at least a soft, > squshy material that does not spring back. It also > crumbles. IBM foam seems to be the worst, along with > the foam used on Zenith PC's, turning into a tarry > goo. > > On the CDC drives I just picked up, the entire inside > of them is covered in this foam, some of it is > starting to come off, or has stuck to cables and such > inside. A couple smaller chunks of it literally fell > off one part of the cover, the glue only holding the > particular particles of the foam to which it was > attached, and the rest of the foam falling away. > > What is the best thing to do about this, especially in > something as sensitive as a disk drive? Should I > remove it? What's the best method? Is there something > I can use to replace it? > > Also, for instance, inside the cover of the PDP-11/84, > there is a thin slab of foam that has turned to crud. > I plan on removing this entirely - vacuuming away what > I can and cleaning the rest off with something - what > will dissolve this? I know that trying to get the gunk > from IBM foam off your hands is nearly impossible. > > Any ideas? > > Thanks! > > -Ian This is a common problem with classic cameras where it is used as light seals. The foam also tends to eat away other stuff like paint etc. so it needs removing. Get rid of as much as you can manually, by vacuuming, picking it out with tweezers from small spaces, scraping etc, then clean the remaining gunk away with alcohol (ethanol) which dissolves it instantly. Take care with plastic surfaces, they may be fogged by the alcohol. For classic cameras, new, better foam is available to replace the old stuff. I have no idea of the price or where to get it from, try asking Jon Goodman (jon_goodman at yahoo.com) who sells it in kits to reseal old cameras.

17 years, 3 months

Punch card racks

by RodSmallwood＠mail.ediconsulting.co.uk

Standard Punched card is 7 3/8" x 3 ?" so find the nearest index card storage drawer size and use that. Rod -----Original Message----- From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of Roger Holmes Sent: 05 May 2007 21:14 To: cctalk at classiccmp.org Subject: Punch card racks Any thoughts of where (in England) to get the metal racks of drawers which used to be used to store 80 column punched cards. There must have been thousands made but I have looked for them on eBay and no luck. I don't suppose they are still made unless they are used for some other purpose (like bank notes). I have seen some a bit bigger but they have pop rivets poking into the storage space which would damage the cards.

17 years, 3 months

Dayton, approaching fast

by marvin＠west.net

If anyone knows the spaces where they will be selling (parking), post it here and we can go and harass each other :). My guess is we won't know until the week before. Last year, Patrick Finnigan (sp?) was there and down about 100 yards >from where I was. I got a chance to meet a number of others on this list and it is really great to put names with faces! If possible, why not plan a dinner get-together on Saturday night for the ClassicCmp group! Anyone interested? I'll be there too in an easy to recognize blue Mazda van ... it has a set of piano keys on each side and back of the van along with "Schwendtner Piano Service". If anyone is into foxhunting, I've been asked to say a few words at that forum so that will be fun. I'm also planning on trying to get an informal transmitter hunting dinner going for Friday night. If anyone here is blind or sight impaired, there will be a blind ARDF event on Sunday ... see http://www.ardfusa.com for details ... and I'll be there too with a friend who will be competing. FYI, I called the Days Inn in Miamisburg earlier this week to make reservations and they still had rooms available ... didn't ask how much :), and it is only about 5 miles or so from Hara (as I recall.) Marvin, KE6HTS > From: "Jason T" > Just bought my vendor ticket and made my hotel res (a bit far away, > unfortunately, but that's what I get for waiting so long.) > > I'll be in the black Honda Element, IL plates, selling some really > useless junk if anyone wants to say "hey."

17 years, 3 months

Punch card racks

by roger.holmes＠microspot.co.uk

Any thoughts of where (in England) to get the metal racks of drawers which used to be used to store 80 column punched cards. There must have been thousands made but I have looked for them on eBay and no luck. I don't suppose they are still made unless they are used for some other purpose (like bank notes). I have seen some a bit bigger but they have pop rivets poking into the storage space which would damage the cards.

17 years, 3 months

That horrible computer foam

by roger.holmes＠microspot.co.uk

On 5 May, 2007, at 00:09, cctalk-request at classiccmp.org wrote: > > Message: 17 > Date: Fri, 4 May 2007 13:50:54 -0700 (PDT) > From: Mr Ian Primus <ian_primus at yahoo.com> > > As I have been collecting computers, I have noticed > that some pieces of equipment like printers and the > like, contain a lot of this awful foam stuff, most > likely for noise deadening. Time has caused this foam > to break down and turn to gunk, or at least a soft, > squshy material that does not spring back. For the ink jet printers, beware that when they clean their print heads, some models dump the excess ink into this foam or into something like blotting paper. The older and larger models have an excess ink bottle, and after many many hours operation they will ask you to empty that bottle. Usually this is based on a calculation of how much ink is there, rather than a level sensor, so if you tell the printer you have emptied it, but haven't actually done it, it will eventually overflow and make a real mess of you carpet. Some small printers so the same calculation of when the foam/blotting paper is fully saturated and ask you to change it.

17 years, 3 months

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test-drb May 2007