test-drb April 2010

test-drb@ccmp.vtda.org

172 participants
242 discussions

40 yrs ago today, April 13, 1970, "Houston we've had a problem" by James A. Lovell

by ragooman＠comcast.net

40 yrs ago today, April 13, 1970, "Houston we've had a problem" by James A. Lovell http://history.nasa.gov/SP-350/ch-13-1.html

16 years

Has anyone ever heard of theProtec Microsystems PRO-83?

by Robert.Melville＠forces.gc.ca

I have a pro-83 with the power supply. You can have it for postage. The only thing wrong with it is one of the capacitors came off the board. Bob Melville 250 941-4651 After 4 pacific

16 years

New old products :)

by trag＠io.com

> > Date: Tue, 13 Apr 2010 09:05:41 -0300 > From: "Alexandre Souza - Listas" <pu1bzz.listas at gmail.com> > > Next time, use kicad, diptrace or something useful. Eagle sux. For Macintosh users Osmond PCB is very nice. I mention it only because Macintosh based PCB layout software is thin on the ground so Mac users might think there's nothing for their platform. The fellow who developed Osmond seems to be quite a guy. At least, during the years long (free) beta period he answered emailed questions about the software quickly, clearly and friendly, and fixed bugs. Jeff Walther

16 years

chips vs chad

by roger.holmes＠microspot.co.uk

> > From: "Chuck Guzis" <cclist at sydex.com> > >> I wonder if "chad" had origins with teletypes and paper tape, an >> industry (telephone) separate from the punched card / data processing >> industry way back when, and in which different terminology developed. > > Dunno, but either was fun to hide in a friend's drawer or light > fixture. Paper tape punches were far nastier than the ones from > punched cards. Why nastier? The card ones are thicker (7 thou) and have sharp square corners. I think the first time I heard about them (in the UK) the card ones were called chads. It in a warning from our lecturer not to use them as confetti as he knew of a case of them getting into the bride's eye and she spent the next few hours in hospital because of them. I think the holes were oblong so that the sideways on (row at a time) brushes of old IBM equipment could get through them easier. I don't think brushes would be able to read them a column at a time. By the way, I have some 80 column cards punched with round holes, two holes for each oblong one, and they were described as 160 column cards. Roger Holmes

16 years

Memorex 102 20MB Hard disk

by thomas.gardner＠sbcglobal.net

> ------------------------------ > > Message: 18 > Date: Sun, 11 Apr 2010 14:25:09 -0400 (EDT) > From: Steven Hirsch <snhirsch at gmail.com> > Subject: Memorex 102 20MB Hard disk > To: Classic Computers Mailing List <cctech at classiccmp.org> > Message-ID: <alpine.DEB.2.00.1004111405140.3802 at duo> > Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII > > Has anyone on the list seen or work with one of these? I received a > Morrow M-20 8-inch hard disk along with my N* Horizon and found the > Memorex 102 disk mechanism inside (what a beast!). > <snip> I worked on the 101/102 See http://www.bitsavers.org/pdf/memorex/disc/112-114.60-00_Memorex112_Fujitsu23 01_jan83.pdf for the Memorex 112 Technical Manual; the 112 is a later version of the 102 and they probably have a lot in common. Paragraph 1.2.2 shows the typically current wave forms which should be the same. According to the spec the start up current is 6A peak and 1.6A running. So when running yr 10 ohm is only 1/4 watt and should be cool. The peak power of less than 3.6 watts should only last a very short time as the motor comes up to speed and it's back EMF lowers the current to the running current of well under 1.6A (the running current supplies both the spindle motor and the stepper motor). Again the figure shows a spindle motor start up current of about 4.5A and the peak 6A occurs during stepping. Good luck. BTW, if you have an 102 documents I would really like a copy, personally or at bitsavers. Tom

16 years

telegrams then and now

by dgriffi＠cs.csubak.edu

I just discovered that Western Union's old telegram service isn't really dead -- just sold to an outfit called "iTelegram". Never having really looked at telegram services until now, I was wondering if anyone had any information on what a same-day telegram cost way back when. Nowadays, iTelegram does it for $45 + 88 cents a word. -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail?

16 years

Canon PJ 1080A printer manual

by ray＠arachelian.com

Anyone have a manual for these beasties? I'm looking for the print codes for it. I've found some demo programs and a few of the print codes on the web, but nothing complete.

16 years

Need MK3801 datasheet

by m.jafari＠bahamadsanat.com

Dear John, Thanks for ur info at web, How can I get information about MK3801 from U? Please help me Best regard

16 years

VAXstation 4000 VLC Power Supply

by mcguire＠neurotica.com

On 4/11/10 6:37 AM, Rob Jarratt wrote: > I have a faulty power supply in one of my VAXstation 4000 VLCs (clicks on > and off more than once a second). This failure mode of switching power supplies has been discussed here before. What was the common cause of this, Tony? The startup resistor or something, right? -Dave -- Dave McGuire Port Charlotte, FL

16 years

Xedex Baby Blue CPU Plus ISA card

by shawn.t.rutledge＠gmail.com

I just found one of these in my pile if anyone wants it.

16 years

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test-drb April 2010