test-drb March 2015

test-drb@ccmp.vtda.org

167 participants
224 discussions

by aek＠bitsavers.org

On 3/1/15 7:51 PM, John Foust wrote: > No one's asked who died? > I thought the art was interesting. He also had a picture of Goddard.

9 years, 2 months

HP 9100B not functioning after shipping. Suggestions welcome

by dfnr2＠yahoo.com

Hello, I recently acquired an HP9100B which was working before shipping, but on arrival does not respond. The fuses are intact, and I can hear the power supply humming on power up, but there is no CRT output, and I cannot activate the error light (for example, by STOP-CLEAR-/ to get a divde by 0 error.) The register label backlight also doesn't light, but apparently did not light before shipping, when the calculator otherwise worked. I have Tony Duell's excellent schematics, which I'm grateful for. I also have a service manual, and plan to go through it, but it seems a bit short on theory and detail. I'm not in position to swap out boards. I haven't been able to check it out in depth yet, but this week I will be able to spend some time on it.? I have, however, done some basic inspection, and reseated whatever boards are accessible without a screwdriver.? This didn't help anything.? I didn't hear any rattling from the CRT, but haven't yet pulled it out to inspect it. My plan is to start out by checking the power supply voltages, clocks, and move on from there. However, since apparently something changed during shipping, I'd be interested in any suggestions that would help inform a smarter investigation. I am hopeful it's not the CRT, as I would expect a bad CRT to not interfere with the error light. Any suggestions or guidance would be very much appreciated. Dave

9 years, 2 months

A few DEC boards available

by paulkoning＠comcast.net

Available, free, first come first serve: M9202 Unibus long jumper (I have 3) DEFPA-DA dual attached FDDI PCI NIC (untested, no software, but believed to be working) paul

9 years, 2 months

date representation standards before ISO 2014 and ISO 8601

by spacewar＠gmail.com

In a lot of contexts that predate widespread adoption of ISO 2014 and ISO 8601 (and their relatives), I've seen dates represented in a form such as "02-MAR-79" or "02-MAR-1979". This is similar to the RFC 822/1123 date format, except that those RFCs don't use a hyphen between the components, and use mixed-case for the month. Was there ever an official standard defining such a representation?

9 years, 2 months

HP 7970E mag tape brackets

by jwest＠classiccmp.org

I was just informed that the "new manufacture" mounting brackets for the 7970E are ready. I saw them at about 90% of the fabrication process being complete and they looked really good. Today I'm going to stop at the hardware store and buy a set of bolts/nuts/washers that match the originals (got them there before so I know they have the right ones) so that I can ship each one with a baggie of the "right stuff". I will probably have them shipped out to the people that wanted one by the end of next week-ish. If you were one of those people that confirmed you needed one or two, please email me your shipping address. Best, J

9 years, 2 months

PDP8 Boards

by useddec＠gmail.com

I have numerous requests lately PDP8 parts. In digging out some I knew I had more than I would ever use. The following is a list of boards that are probably not needed for my current plans. Please contact me off list. Shipping is from 61853. $10 for any qty shipped to US. For sale or trade. M8315 8A cpu $150 M8316 option #1 150 M8320 100 M8342 LS8-E 100 M8350 POS I/O 150 M8360 Data Break 150 M8365 LC8-P 75 M8366 LQP8E 75 M841 LE8-E 100 M865 KL8 100 M8650 Kl8 100 M8650-YA 100 M8652 100 M8653 100 M866 DP8-E 100 M884 KG8-E 100 Thanks, Paul

9 years, 2 months

BC01W-25 cables

by useddec＠gmail.com

They also dug up some BC01W-25 cables that I thought were LCG cables, which I have some here somewhere. According to the option module list they are for Bell series 303 modems and work on the DP8-EB, DQ11, and who knows what else... If interested, please contact me off list. Thanks, Paul

9 years, 2 months

LPS-11

by useddec＠gmail.com

I had my hired help here yesterday digging some things out for me. While looking for a LAB-8 for a list member they dug up a Lab Peripheral System 11. If anyone is interested in that or a MINC-11, please contact me off list. Oh, were still looking for the LAB-8. Maybe next weekend... Thanks, Paul

9 years, 2 months

DEC handbooks at LA estate sale

by brendan＠bslabs.net

Just a heads up for anyone around Los Angeles, I was browsing some local estate sale listings and saw one that had a big collection of DEC handbooks from the late-70s/80s: logic, software, microcomputer, peripherals, VAX software source book, VAX Architecture/Hardware/Software. It?s the last two pictures at: http://www.estatesales.net/estate-sales/CA/Los-Angeles/90049/823725 <http://www.estatesales.net/estate-sales/CA/Los-Angeles/90049/823725> Brendan

9 years, 2 months

How to save two Mitsubishi M2896 drive (spindle motor smoked!)

by enrico.lazzerini＠email.it

I have a couple of 8" drives Mitsubishi M2863 slim type that I recovered I think around on 1990 both in excellent conditions with which I created images and written several floppy disks 8". For some reason, including my incompetence, both their spindle motor do not run any more. And powering correctly with only +24Vdc the circuit part of the engine rotation control of the disk (called spindle motor) begins to smoke near a chip LB1620. The schematic contained in the maintenance manual of the drive includes components of other different model of spindle motor circuit. If that were possible, how could I to be able to run the drives correctly: reusing partly engine or even replacing it with analogous maybe even creating handcrafted a motor with pieces of recovery and manage the number of RPM (I think 360rpm for 8" drive) possibly with special circuit ? At this moment there is a shortcircuit between +24vdc pin and ground pin. Pics https://www.dropbox.com/sh/p12w71v69tjgfz7/AAAIReql4Se5ZCkLClPoAVOPa?dl=0 references M2896-63_Maintenance_Manual https://www.dropbox.com/s/8rhukkr1xf78m8c/M2896-63_Maintenance_Manual.pdf?dl =0 M2896-63_Half-Height_Drive_Brochure https://www.dropbox.com/s/elmj3nwz59dz2eo/M2896-63_Half-Height_Drive_Brochur e.pdf?dl=0 Spindle motor SRC SHINANO TOKKI CORP. MADE IN JAPAN 702V Modello DLF-3ME DC24V Any suggestion is welcome. Enrico

9 years, 2 months

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test-drb March 2015