test-drb

test-drb@ccmp.vtda.org

101090 discussions

by bear＠typewritten.org

Folks; The 5V rail in my Sun 2/120's PSU recently failed suddenly while the system was running. No pop, but the rail measures out around 2.5VDC. I believe I have tracked the fault down to one of a pair of 26000uF electrolytics which are in parallel across the 5V output studs. These are screw-lead, rated for 7.5V (12V surge), 85 deg. C, -10 +75% tol. They are 1.375" dia, and 2.125" tall. Mechanically, there is no room for anything even slighlty larger. Mouser stocks a part which is physically too tall---at 3.125", too tall by an inch. This is a 10V (12V surge) part. They also stock a 50V part from a different manufacturer which is even taller (>4"). There are 10V (12V surge) parts that fit, but have too low a capacitance (18000uF). There are 7.5V (9V surge) parts which will fit, but have too high a capacitance (49000uF), and I'm not totally sure how to be certain that a 9V surge rating is adequate in this application. Digi-key stocks nothing even close. Any suggestions? ok bear

15 years, 7 months

For sale: Some DEC stuff

by hachti＠hachti.de

Hi folks, anybody interested in buying the following? - Omnibus core memories (tested good) - M8350 TTY interfaces (tested good) - RK05 disks for pdp11 (12 sectors) (used, new, tested, untested) - RK05/RK05J/RK05F disk drive (untested, tested good, broken) - RK05x spares - TU56 DECTape (tested working, untested, broken) - TU56H single DECTape - PC05 paper tape reader/punch - Some other Omnibus cards PDP8/M ******* A PDP8/M computer. Very nice (near perfect!) condition front panel. Chassis condition lower medium condition. Backplane and PSU (220V) ok. No top cover. System configuration to be discussed. First guess would be 12K core, TTY, CPU - all tested stuff. PDP8/L ****** PDP8/L minicomputer, untested, keys bleached out by sun. Untested (really untested, currently don't have the time to repair the machine) but complete with the 4K core stack. 110V Keys kan be used from a pdp8/e - they're the same. But not from pdp8/m. Those have the wrong colour. The PC05 is a strange machine: The reader portion of it was used on a pdp8/e (PC8E interface). Normally you use PC04 for pdp8 computers. The reader part seems to be compatible. The punch part is untested. Mechanics look fine. I guess that there are also missing boards on the punch side. Nice condition though. No cover, 110V. Location: Northern Germany (Hannover, Kiel). Open for reasonable offers. Can send packages up to 30kg. TU56 can be shipped in two packages. pdp8/m fits a package. 8/L cannot be shipped internationally. Kind regards, Philipp -- http://www.hachti.de

15 years, 7 months

VCFeast

by wdonzelli＠gmail.com

I have not heard anything about VCF East 2010. Will it happen? The year is starting to run down. -- Will

15 years, 7 months

Toshiba 3100/20

by Martin.Stransky＠emerson.com

Hi, Are you still there in 2010? :-) I need to read data from my friend's old Toshiba PC with HDD 26 pin connector. I would need to know what are the signals, or what is the adapter. Could you provide some schematics? thanx martin stransky | UPS engineer | Nove Mesto nad Vahom Emerson Network Power | Piestanska 1202/44 | 91528 NOve mesto nad Vahom T +421 32 7700 423 www.EmersonNetworkPower.com <http://www.emersonnetworkpower.com/>

15 years, 7 months

RCA CDP 18S604B

by marvin＠west.net

I just found a couple of standard bus cards marked "CDP 18S 604B" and no real idea what they are. A Google search gave 3 results, all in German >from their edition of Computer Weekly dated 1981. One looks to be in the original packaging, and the other looks used with an expansion PROM board. Unfortunately, no docs although I'll be trying to see if the person who had them has any docs left. Anyone have any idea what these things are?

15 years, 7 months

RRD40 was :Re: Why CD carriers? was: Wanted: DEC RRD50 CD-ROM Manuals

by chd＠chdickman.com

On Tue, Sep 7, 2010 at 9:10 PM, Eric Smith <eric at brouhaha.com> wrote: > ... the caddy would keep the CD from being scratched in handling. > > Eric > > Which seems reasonable and obvious... The RRD40 that I have was given to me so that I could learn the way of the VAX and VMS. I have since found other CD drives that understand the special way of reading the short CD sectors. Today I am reminded of it, I am bound by honor to pass this drive on to another VAX/VMS kinder. I will send this drive to someone that wants to learn VAX/VMS and needs it to boot the OS. -chuck

15 years, 7 months

Byte, August 1981 issue...

by mdavidson1963＠gmail.com

I'm so excited... I won a copy of the August 1981 issue of Byte (the infamous Smalltalk issue) on Ebay for $4. It arrived while I was away this weekend, so that was an awesome way to end my Labor Day weekend. Mark

15 years, 7 months

Wanted: DEC RRD50 CD-ROM Manuals

by thomas.gardner＠sbcglobal.net

Anyone have a copy of or know the location of the DEC RRD50 maintenance manual, specification, etc.? I'm interested in the interface for historical curiosity only. I'm pretty sure the DEC drive was an OEM Philips CM100. Tom

15 years, 7 months

Wanted: DEC RRD50 CD-ROM Manuals

by thomas.gardner＠sbcglobal.net

On 7 Sep 2010 16:59:16 +0100 Adrian Graham wrote: > On 7 September 2010 02:31, Steven Hirsch <snhirsch at gmail.com> wrote: > > On Mon, 6 Sep 2010, Tom Gardner wrote: > > > >> Anyone have a copy of or know the location of the DEC RRD50 maintenance > >> manual, specification, etc.? ?I'm interested in the interface for > >> historical > >> curiosity only. <snip> > Yep. I'm not in the workshop so can't easily check, but I know we have > one on the 'someone might need one one day' floor, and I'm fairly sure > I've got the manual at home. It's SCSI-1 AFAIK. > -- > adrian/witchy > Owner of Binary Dinosaurs, the UK's biggest home? computer collection? > www.binarydinosaurs.co.uk <http://www.binarydinosaurs.co.uk/> AFAIK the Philips CM100 inside the RRD50 used a proprietary interface, possibly a variant on ESDI - that's one of the things I'm trying to figure out. It maybe that DEC put a SCSI-1 bridge controller inside the RRD50 box so it presented that interface to the world. If possible a scan of the manual would be greatly appreciated. U can contact me off line to figure out how to do it. Tom t<dot>gardner<at>computer<dot>org

15 years, 7 months

Free: Old manuals- Altos, CP/M, PDP-11, Northstar

by tosteve＠yahoo.com

More than 50 pounds total - take one, some, or all. http://www.popbottlecaps.com/temp/books.html Located in southern California- 92656.

15 years, 7 months

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb