test-drb August 2004

test-drb@ccmp.vtda.org

283 participants
661 discussions

by dwight.elvey＠amd.com

>From: "David V. Corbin" <dvcorbin(a)optonline.net> > >>>> >>>> If pressing a key doesn't cause the distributor to spin, >>>> then there's a mechanical problem. You want to investigate >>>> the linkage that starts at the ekyboard (the metal strip >>>> that the H-plate slots into should turn counterclockwise >>>> seen from the left side when you press a key, and is >>>> returned to the clcokwise position by the H-plate). Then >>>> trace the linkage via the H-plate to the clutch at the >>>> back. This should engage when the key is pressed. >>>> > >I always get turned around with spacial relationships in the written >word..... > >Comparing the linkage position to the one on my working unit. It is indeed >in the "deactivated" position and does NOT move when a key is pressed [as a >clarication, the "far" ent of the linkage extends through a slot on the >front of the keyboard assembly. On the working unit, qhen no key is pressed, >the end is down, it travels up when the key is pressed and returns down >when the typing unit finishes its cycle. On the new unit this end is always >in the down position]. > >Attempting to move the linkage (but not overly forcing it] is futile. > >Visual inspection of the path [at least what I can see without moving the >typing unit out of the chassis bay], does not reveal anything. Are there any >typical binding points? Should I be thinking about a seized clutch? > >David. > > Hi David This could have been the cause of the fuse blowing. A jammed keyboard reset linkage might have frozen up the clutch causing the motor to stall. You should remove the print assembly and find the cause of the linkage to jam. The clutch may already be toast. If it is not in the locked up state when you turn the motor on, it would have to be slipping ( not good ). Find the linkage problem. You may have to remove the print assembly because the linkage goes under this part. Dwight

20 years, 4 months

Emulex MV11 on eBay

by meltie＠microvax.org

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item=5715172371&ssPage… It's guarenteed for 15 days after shipping, $9 postage. I'm currently bidding on it up to $40 but I can't afford it now anyway so i'm letting the list know about it! >___< alex/melt

20 years, 4 months

Enigma

by dwight.elvey＠amd.com

>From: "Antonio Carlini" <a.carlini(a)ntlworld.com> > >>Bizarre. Ebay does not allow me to see that item. It says "due to >>restrictions in your home country" which is utter nonsense. It's >>possible that the UK has export restrictions, but that's not what it >>said... > >Don't you think it's more likely that the Dept. Of Homeland >Security is responsible ... after all, they can't be sure >that you're not a terrorist :-) > >As for UK export restrictions, who knows? The seller >seems to be willing to ship world-wide! > >Antonio > > Hi I'm in the US and have no problem looking at it?? Dwight

20 years, 4 months

What fun from a Macintosh SE

by dr.ido＠bigpond.net.au

At 07:52 AM 8/20/04 -0700, you wrote: >> Thanks, but I don't have the required long torx screwdriver and case >> cracker > >That reminds me - where can I find such a tool? I've got a pair of dead >Macs I'd like to open up and try to repair. > >tnx. The long torx screwdriver should be available from any good tool shop, though for the longest time I used one made from the tip of a too short torx screwdriver welded to shaft of another screwdriver. I've never seen a case cracker, but I'm not sure why you'd need one. Every compact mac I've opened has came apart easily once the screws were removed.

20 years, 4 months

FW: ASR-33's and Brain Dead "Repair" man...

by dvcorbin＠optonline.net

On my ASR-33 Looks like it may be a bad transistor in the receive circuit.... Basis for conclusion: 1) switching keyboard units has no effect. 2) disconnecting reader unit has no effect 3) R7 on receive control bord is HOT (to the touch) 4) Selector magnet appears always engaged. 5) Unit does NOT space-out when put in line mode. Now to just find a source for the proper replacement transistors....... David

20 years, 4 months

rarest computers. was: RE: Xerox Alto Restoration + Emulation

by dwight.elvey＠amd.com

>From: "Vintage Computer Festival" <vcf(a)siconic.com> > >They have a *very* well done restoration page. Cool project! However, I >don't believe their claim to have the only original Alto left in existence >is accurate. Hi I was just wondering. What people on this list consider their rarest computers in their collections. Here is my list 1. Nicolet 80 ( 20 bit mini with core. working condition. Only know of 2 others. I doubt there are more than 10 left anywhere. ) 2. SIM-4 4004 development system ( most likely fewer than 30 left. Running. I only know of 2 others. ) 3. Olivetti M-20 ( Few in the US but maybe a couple hundred in Europe. Z8000 processor. Runs ) 4. Jupiter Ace ( Several hundred most likely exist but unusual in that it had Forth in ROM. Runs ) 5. NC4000 Delta Board ( Most likely only 100 around but most have no idea as to the collectable nature. These might be found in embedded system. These are unique in that they have the Forth processor on them that was designed by NOVIX and Chuck Moore. A 4 Mhz processor could run rings around a 33MHz 80386 of its time. Things like sorting 1000 integers in 19.2ms ) Dwight

20 years, 4 months

would anyone read a couple of DECtapes for me? (USA)

by gtoal＠gtoal.com

Some time back our project (the Edinburgh Computer History project) organised a trip to Grenoble to meet Hans Pufal and read a box of DECtapes on his PDP9. Since then we've had a few more tapes turn up and I have a couple of them over here in the states. Is there anyone over here who would be willing to read them for us please? We have code to decode the contents; we just need a raw dump of the blocks. I have one which I can mail any time as a test (some old Fortran code, not very historically significant) and if all goes well I will be getting a second one soon from one of our group members which does have some significant code on it that we'd very much like to recover. Drop me a line - gtoal(a)gtoal.com - if you can help. (If you reply here, I'm not being rude by not replying immediately - I read this group in digest format so I get it a day late) Thanks Graham

20 years, 4 months

Grid 1755 486SLC (looking to purchase)

by timothy.finegan＠cmich.edu

I am look to purchase a Grid 486SLC model 1755. Would you happen to have one for sale? T. Finegan

20 years, 4 months

***needed: Auerbach books, reports and journals especially. the early ones. Also any early data processing journals and information. reply off list to me directly please.

by esharpe＠uswest.net

***needed: Auerbach books, reports and journals especially. the early ones. Also any early data processing journals and information. reply off list to me directly please. Thanks Ed Sharpe, Archivist for SMECC - - See the Museum's Web Site at www.smecc.org Coury House / SMECC 5802 W. Palmaire Ave. Phone 623-435-1522 Glendale Az 85301 USA

20 years, 4 months

Places in LA?

by evan947＠yahoo.com

I don't know of a place in LA, but for anyone who's interested, I keep an "On the road: Where to see old computers" directory at the web site for the Computer Collector E-mail Newsletter. The site is http://news.computercollector.com. - Evan

20 years, 4 months

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test-drb August 2004