test-drb

test-drb@ccmp.vtda.org

101090 discussions

by vernon_wright＠hotmail.com

Sorry to just barge in - I'm an old S100-CP/M type who wishes he had the time to spend here - but I don't. I do have 3 Molecular servers with 20meg hard drives and tape backup, and plenty of interface boards. I had intended some years ago to put them in a 'senior citizens' complex as a LAN but time and technology made the project implausible. These must go - RSN. For sale REASONABLE, or amusing trade. I'm in San Diego - and yes, Don Maslin has declined. Vern Wright vernon_wright(a)hotmail.com _________________________________________________________________ STOP MORE SPAM with the new MSN 8 and get 2 months FREE* http://join.msn.com/?page=features/junkmail

23 years, 5 months

Appearance on TechTV

by vcf＠siconic.com

A heads up: I will be appearing on TechTV this Thursday, November 7, between the hours of 4:00p and 5:30p. I don't know the name of the program or the exact time (I'll be finding out tomorrow) but this at least gives you advance warning if you want to catch it. I'll be bringing along some interesting old computer thingies to show. If you want to suggest a personal favorite let me know ;) TechTV is usually in the premium cable TV line-up, so you may not be able to see the program if you don't have every stupid channel that your local cable TV operator offers. More info tomorrow. Also, my domain name situation seems to have been ironed out. I can once again receive e-mail (the website has been back for about a day and a half now; I don't know why e-mail took longer). -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *

23 years, 5 months

DDS-2 drive errors on Microvax 3100, VMS 7.3

by slavko.v＠sezampro.yu

Did you resolve your problem ? I have very similar problem with tape and hdd-s. Any suggestions form you ? Thanks in advance ! S.Vukelic

23 years, 5 months

am100 emulator, aka vam, aka virtual alpha micro, ...

by mike＠otterway.com

Forwarding this to the classic cmp list 'cause I know some of you are interested, but I'm not an active reader of this list. > For anyone interested, here is the 0.3 snapshot of my alpha-micro am-100 > emulator. > > http://www.otterway.com/am100 > > This is the first to boot AMOS and run BASIC! Here's the $README... > > -------------------------------------------------------------------------- -- > ------------------- > > /* AM-100.doc (c) Copyright Mike Noel, 2001-2002 */ > > > PREFACE > > This software is an emulator for the Alpha-Micro AM-100 computer. It is > copyright by Michael Noel and licensed for non-commercial hobbyist use under > terms of the "Q public license", an open source certified license. > > There exist known serious discrepancies between this software's internal > functioning and that of a real AM-100, as well as between it and the WD-1600 > manual describing the functionality of a real AM-100, and even between it > and the comments in the code describing what it is intended to do! Notice > that this software hasn't reached the 1.0 version yet. In fact it's a long > way from it. It's not beta; it's alpha. Use it at your own risk! > > Reliability aside, it is not the intent of the copyright holder to use this > software to compete with current or future Alpha-Micro products, and no > such competing application of the software will be supported. > > Alpha-Micro and other software that may be run on this emulator are not > covered by the above copyright or license and must be legally obtained from > an authorized source. > > As this is written I have permission from Alpha-Micro to distribute AMOS 5.0 > with the emulator so you can get that from me too - but it is subject to > their terms and conditions. > > > INSTALLATION > > Preferred installation is to compile the source on the target machine. > Tested targets include Red Hat Linux (6.1, 6.2, 7.0, 7,1, and 7.2) and > Microsoft Windows 98SE and 2000 using Cygwin 1.3.12-2 and 1.3.13-1. Frankly, > Windows 98 is not a good target. Windows 2000 and Linux are both OK. > > Step Zero. You have at least 12 megs free space - right? > > We will assume you have downloaded the source and > AMOS into a directory on your (running, known good) > linux or cygwin system; those files being > > ./AM-100-0.3.tgz > ./amos50.tgz > > Step One. Create a sub directory and untar the source. > > mkdir am > cd am > mv ../AM-100-0.3.tgz . > mv ../AMOS50.tgz > tar -xzf AM-100-0.3.tgz > tar -xzf amos50.tgz > > Step Two. Compile the source. > > make > > Step Three. Run it! > > ./AM-100 > > Step Four. What's this message... > > "boot failed! Problem with 'dsk0-container' ?" > > dsk0-container is the name of the file that represents DSK0 > in the emulator. Similarly, dsk1-container represents DSK1, > and dsk2-container and dsk3-container do the obvious. Each > container is 10 megs (19980 blocks). > > Since you might already have a dsk0-container, I've packaged > the AMOS release as dsk1-container. If you have enough free > space just copy dsk1-container to dsk0-container - if not > rename instead. > > Then run it again! > > cp dsk1-container dsk0-container > ./AM-100 > > Step Five. It booted - right? > > If not contact me & I'll try to help you figure out why... > > > OPERATION > > The window you run this in (msdos? cygwin? xterm?) is probably defaulted > to 25 lines x 80 columns. You need to shrink it to 24x80 (or vue and fix > won't scroll correctly). One reason I don't like W98 is I haven't found a > way to do that there... > > If you've other containers (dsk1-container, etal) you can mount and unmount > them as you like. Can't change without restarting the emulator thou... > > All the control keys should work. Esc should work. The Arrow keys, Insert, > Delete, Home, End, PgUp, and PgDn should work - at least as I would want > them to!! > > Watch out for ALT keys. ALT C means quit the emulator. ALT T toggles > instruction tracing. ALT S toggles instruction stepping (which doesn't work > in this release). See PS3.C for all the key mappings. > > Console output is to STDOUT. Traces go to STDERR. So if you want to try a > trace but don't want it mixed with your screen, start the emulator with > > ./AM-100 2>AM-100.log > > Then all the trace output goes into a file. Watch out - it gets huge very > very fast. Actually there is also a "user" trace facility, but I'm not > ready to try and document it yet. > > There are some other tricks you can play with STDOUT and STDERR. One is to > TEE the STDOUT so that all your console activity gets copied into a file. > Like this: > > ./AM-100 | tee AM-100.lst > or: > ./AM-100 2>AM-100.log | tee AM-100.lst > > CUT and PASTE works with the STDOUT console window. Access them by clicking > on the little icon on the left of the window bar. They are under 'edit'. > So copy that big basic program off your real machine and paste it into AMOS > basic (or edit) (or whatever). > > DO NOT USE DIRSEQ. It scrambles directories. I will track that down and > fix it for the next release. > > > PERFORMANCE > > Performance has not been a design consideration. There are dozens of places > it could be dramatically improved. My judgment is that's not worth the > effort. But judge for yourself. On a Pentium 166 laptop with linux 6.2 it > seems pretty close to what I remember my AM-100 being able to do. The ways > that AMOS loops when it doesn't have work are converted into sleeps, so it's > pretty low impact even on an old slow box. > > Of course on a 2.4 gig p4 it screams. Certainly much faster than the > AM-1000 I traded in my old AM-100 to buy, but I've no idea how it compares > to modern systems. > > Maybe someone will run some benchmarks??? > > > WHAT IS CHANGED/ADDED TO AMOS 5.0? > > Not much. The system.mon is a standard mongen of sysbsw.mon and my own disk > driver vdk.dvr[1,6]. I patched ps3.idv[1,6] to create ps3new.idv[1,6]. > Ansi.tdv[1,6] is a hack of a vt100 driver I wrote years ago. System.ini[1,4] > is a demonstration of bank switched memory. Spoolr.ini[1,4] is just a way > to test lptspl with output to the console. > > Source for vdk.dvr, ps3new.idv and ansi.tdv are not provided simply because > I haven't had time. vkd is a one-instruction link to the container file > disk system in hwassist.c. ps3new is just a branch back to output all > waiting chars at once instead of just one per clock tick - a performance > improvement. Ansi.tdv is just an ugly hack for the tcrt calls - the more > difficult input processing is handled in the ps3.c module of the emulator. > > > WHAT DO I **KNOW** DOES NOT WORK? > > Aside from DIRSEQ most stuff seems to work. LISP and PASCAL may not work > but I know so little about them I'm not certain. > > Format 11 instructions (floating point) have only been working a few days. > They are probably really sick and I just haven't noticed yet. But enjoy > basic until they bite you! > > I also have pretty good reason to think PS.V handling (and 'over/under flow' > in general) is not quite right. What the book says is supposed to happen is > at odds with what diagnostics check for and what known running programs do! > > > HOW TO REPORT A NEW BUG > > Send me an email (mike(a)otterway.com) telling me what you did, what happened, > and why you don't think that should have happened. For example: "I compiled > and ran xyz.bas and it crashed saying it couldn't open file aaa.bbb, but > aaa.bbb was there like it was supposed to be and this program and file work > on my real AM-100". So far I'm pretty prompt getting back to people who > tell me about problems, hopefully that will continue... > > > SOFTWARE DONATIONS > > Were you a software developer in the AM-100 heydays? Still have a copy of > your pride and joy laying around? Why not let others remember with you! > Let me post a copy for use with the emulator. All donations welcome! > > > CREDITS > > A number of people have helped and/or inspired me to write this thing. > > There's Jim Battle, who's built web pages and emulators for several machines > including the Processor Technology SOL-20 (see > http://www.thebattles.net/sol20/sol.html) . We share an interest in > Processor Tech hardware and software and I really admire the way he has > pulled all that arcane stuff together. > > There's Roger Bowler (etal) and the Hercules project (IBM mainframe > emulator, see http://www.conmicro.cx/hercules). I spent a lot of my career > as an OS sysprog, and what that team of people have done is just > magnificant. Many design elements of my emulator come from them - I even > borrowed their use of the Q license! > > There's Harvey, a guy who saved some of my old books for 20+ years in his > garage. Some were manuals for my old AM-100! There's Mike, who still has a > running AM-100, and was good enough to send me a copy of his wd16 manual. > There's Rhett who found me a really clean complete copy of amos. There's > Joe, another guy with a running AM-100 who sent me an assembled copy of the > cpu diagnostic and worked with me to get it to run without a monitor. And > of course there's Alex who has given permission to distribute amos along > with the emulator so more people can enjoy it. > > >

23 years, 5 months

cctech digest, Vol 1 #191 - 35 msgs

by Maddog1331＠aol.com

Hi everyone, I am new to the board, and hope you might be able to help me figure something out. I have bought locally and resold old computer items over ebay, and I have come across what looks to be an old Honeywell dummy terminal, with keyboard. Here is a link to a pic: http://server3001.freeyellow.com/maddog1331/honeywell.JPG What I would like to find out is exactly what I have here, what it hooked into, what kind of value, when it came out, etc...I have checked on the net but have came up with nothing on this. Any help would be greatly appreciated! Sincerely, Mark Saarinen Kentucky, USA

23 years, 5 months

Bringing up a 10 years dormant VAX 11/750

by Fred.van.Kempen＠microwalt.nl

> Agreed, I don't think it would be good if we were to have a > list member killed by a classic computer... Directly or > indirectly... Well, I'd rather be zapped by an PDP-11/70 than a stray bullet >from some *hole "out there"..... just a thought :) Stone would read: "Here lies Fred, powered by PDP-11/70.. he couldnt take the power..." :) --f

23 years, 5 months

Best version of AIX for my RS6000

by xds_sigma7＠hotmail.com

OK, I'm *jealous*... S/390 card for anything = drool... Um, I have a 4381... Sure your S/390 is faster, etc. but my S/370XA could crush it flat ;p Will J _________________________________________________________________ Surf the Web without missing calls! Get MSN Broadband. http://resourcecenter.msn.com/access/plans/freeactivation.asp

23 years, 5 months

VAXvector seen on epay...

by rschaefe＠gcfn.org

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2068622725 says it all. No connection to seller... Bob

23 years, 5 months

VAX and Alpha K/V/M cables.

by allain＠panix.com

> 1) I think you mean D9. K/V/M here means keyboard/video/mouse. In this case (there's video on a 3w3) it is more a K/M. The D15 (yup) looks like the KVM's used elsewhere (vaxStations), hence this new question. > 3) This subject was discussed here at great > length not more than a week or two ago. Nope, I wouldn't want to start that one again. John A.

23 years, 5 months

875 Power Controller/H7104C 2.5VDC PSU/H7104D 5VDC PSU

by Fred.van.Kempen＠microwalt.nl

OK... so your backplane is hosed. Do you have a dummy load to "load" the PSU with? It probably complains about it not having a load to work with, hence the REG fail....methinks your PSU is fine, just not the backplane or its power harness. Remember that cable harness insulation plastic rots... as well :) --fred > -----Original Message----- > From: John Willis [mailto:cctalk-admin@classiccmp.org]On > Behalf Of John > Willis > Sent: Friday, November 08, 2002 1:43 AM > To: cctalk(a)classiccmp.org > Subject: RE: 875 Power Controller/H7104C 2.5VDC PSU/H7104D 5VDC PSU > > > This is very interesting. Removing everything from the > backplane results > in only the REG FAIL light coming on. No more +5V FAIL or +2.5 FAIL. > > Any ideas? > -----Original Message----- > From: Fred N. van Kempen > Sent: Thu 11/7/2002 4:50 PM > To: cctalk(a)classiccmp.org > Cc: > Subject: RE: 875 Power Controller/H7104C 2.5VDC > PSU/H7104D 5VDC PSU > > Yes. Or in the "final" part of the PSI itself. Because it > is shorting, the load of the PSU, it's killing the regulators. > Or, such is my guess.. > > --f > >

23 years, 5 months

875 Power Controller/H7104C 2.5VDC PSU/H7104D 5VDC PSU

by jwillis＠arielusa.com

This is very interesting. Removing everything from the backplane results in only the REG FAIL light coming on. No more +5V FAIL or +2.5 FAIL. Any ideas? -----Original Message----- From: Fred N. van Kempen Sent: Thu 11/7/2002 4:50 PM To: cctalk(a)classiccmp.org Cc: Subject: RE: 875 Power Controller/H7104C 2.5VDC PSU/H7104D 5VDC PSU Yes. Or in the "final" part of the PSI itself. Because it is shorting, the load of the PSU, it's killing the regulators. Or, such is my guess.. --f

23 years, 5 months

875 Power Controller/H7104C 2.5VDC PSU/H7104D 5VDC PSU

by pete＠dunnington.u-net.com

On Nov 8, 0:50, Fred N. van Kempen wrote: > Yes. Or in the "final" part of the PSI itself. Because it > is shorting, the load of the PSU, it's killing the regulators. > Or, such is my guess.. I'd agree. I don't know if the regulators are like those in -11's, but if they are, and can run safely for a short time without load, I'd try it with all the boards removed. Anyone know if this is safe? -- Pete Peter Turnbull Network Manager University of York

23 years, 5 months

875 Power Controller/H7104C 2.5VDC PSU/H7104D 5VDC PSU

by Fred.van.Kempen＠microwalt.nl

Yes. Or in the "final" part of the PSI itself. Because it is shorting, the load of the PSU, it's killing the regulators. Or, such is my guess.. --f

23 years, 5 months

875 Power Controller/H7104C 2.5VDC PSU/H7104D 5VDC PSU

by jwillis＠arielusa.com

Load-level? As in on the backplane? -----Original Message----- From: Fred N. van Kempen [mailto:Fred.van.Kempen@microwalt.nl] Sent: Thursday, November 07, 2002 4:29 PM To: cctalk(a)classiccmp.org Subject: RE: 875 Power Controller/H7104C 2.5VDC PSU/H7104D 5VDC PSU John, "Over Current"- smells like a load-level short. --fred > -----Original Message----- > From: John Willis [mailto:jwillis@arielusa.com] > Sent: Friday, November 08, 2002 12:22 AM > To: cctalk(a)classiccmp.org > Subject: RE: 875 Power Controller/H7104C 2.5VDC PSU/H7104D 5VDC PSU > > > The lights do come on, it's just that the ones that come on are > > (o) = lit, ( ) = not lit > > ( ) Power OK > ( ) Over Voltage > (o) Over Current > (o) +2.5V Fail > ( ) +5V Fail > (o) Reg Fail > ( ) Over Temp > > (o) Power > > Have the printsets now, will probably take both units apart for > Inspection and cleaning. > > John > > -----Original Message----- > From: Peter Turnbull [mailto:pete@dunnington.u-net.com] > Sent: Thursday, November 07, 2002 2:45 PM > To: cctalk(a)classiccmp.org > Subject: Re: 875 Power Controller/H7104C 2.5VDC PSU/H7104D 5VDC PSU > > > On Nov 7, 13:43, John Willis wrote: > > Anyone have any documentation on these units as far as > > What to do when the fail lights come on? > > The Field Maintenance print sets for the PSUs and the power controller > are available at http://208.190.133.201/decimages/moremanuals.htm > (part of the DFWCUG Historical CPU Preservation Society). They are > BIG files. > > If an 875 power controller is like an 876, then if the lights > don't come > on, reset your breaker :-) > > I don't know about the H7104's (I've never seen one up > close). I assume > there is something plugged into the 3-pin Power Bus connector, or you > have the three-way switch in the "local" position, otherwise it won't > turn on. > > -- > Pete Peter Turnbull > Network Manager > University of York >

23 years, 5 months

875 Power Controller/H7104C 2.5VDC PSU/H7104D 5VDC PSU

by Fred.van.Kempen＠microwalt.nl

John, "Over Current"- smells like a load-level short. --fred > -----Original Message----- > From: John Willis [mailto:jwillis@arielusa.com] > Sent: Friday, November 08, 2002 12:22 AM > To: cctalk(a)classiccmp.org > Subject: RE: 875 Power Controller/H7104C 2.5VDC PSU/H7104D 5VDC PSU > > > The lights do come on, it's just that the ones that come on are > > (o) = lit, ( ) = not lit > > ( ) Power OK > ( ) Over Voltage > (o) Over Current > (o) +2.5V Fail > ( ) +5V Fail > (o) Reg Fail > ( ) Over Temp > > (o) Power > > Have the printsets now, will probably take both units apart for > Inspection and cleaning. > > John > > -----Original Message----- > From: Peter Turnbull [mailto:pete@dunnington.u-net.com] > Sent: Thursday, November 07, 2002 2:45 PM > To: cctalk(a)classiccmp.org > Subject: Re: 875 Power Controller/H7104C 2.5VDC PSU/H7104D 5VDC PSU > > > On Nov 7, 13:43, John Willis wrote: > > Anyone have any documentation on these units as far as > > What to do when the fail lights come on? > > The Field Maintenance print sets for the PSUs and the power controller > are available at > http://208.190.133.201/decimages/moremanuals.htm (part > of the DFWCUG Historical CPU Preservation Society). They are > BIG files. > > If an 875 power controller is like an 876, then if the lights > don't come > on, reset your breaker :-) > > I don't know about the H7104's (I've never seen one up > close). I assume > there is something plugged into the 3-pin Power Bus connector, or you > have the three-way switch in the "local" position, otherwise it won't > turn on. > > -- > Pete Peter Turnbull > Network Manager > University of York >

23 years, 5 months

[OT] Licenses?

by Fred.van.Kempen＠microwalt.nl

Hi All, Although I am aware of the (VMS) Hobbyist License (which I still dont have, GRRRRR) which provides licenses (PAKs) for VMS and its layered thingies, I have a question regarding this. Over time, I have accumulated a fair number of official DEC PAK's for various of their software systems. Most of these were part of deals where I got or bought some company's complete systems room inventory, so, systems, periphs, media, manuals and licenses (lock, stock & barrel is the expression, imsmr). Now.. are these licenses still valid? I can't find any date expiration and/or software version limitation info on the PAK sheets, so, would assume they're still valid... I'm asking, because I want to provide a login services to a VMS, Ultrix and RSX host for some of my customers, to basically "host" their application for them. Kinda ASP-ish, old style ;-) Obviously, this would _not_ be for th Hobbyist License, soo.. licenses needed. I can get a customer's RSX11MPlus license, because I will terminate his machine (for him ;-) and move the contents over to mine. The VMS and Ultrix licenses I already have, but, again, they don't have my company's name on them. Does anyone know? Thanks, Fred

23 years, 5 months

875 Power Controller/H7104C 2.5VDC PSU/H7104D 5VDC PSU

by jwillis＠arielusa.com

The lights do come on, it's just that the ones that come on are (o) = lit, ( ) = not lit ( ) Power OK ( ) Over Voltage (o) Over Current (o) +2.5V Fail ( ) +5V Fail (o) Reg Fail ( ) Over Temp (o) Power Have the printsets now, will probably take both units apart for Inspection and cleaning. John -----Original Message----- From: Peter Turnbull [mailto:pete@dunnington.u-net.com] Sent: Thursday, November 07, 2002 2:45 PM To: cctalk(a)classiccmp.org Subject: Re: 875 Power Controller/H7104C 2.5VDC PSU/H7104D 5VDC PSU On Nov 7, 13:43, John Willis wrote: > Anyone have any documentation on these units as far as > What to do when the fail lights come on? The Field Maintenance print sets for the PSUs and the power controller are available at http://208.190.133.201/decimages/moremanuals.htm (part of the DFWCUG Historical CPU Preservation Society). They are BIG files. If an 875 power controller is like an 876, then if the lights don't come on, reset your breaker :-) I don't know about the H7104's (I've never seen one up close). I assume there is something plugged into the 3-pin Power Bus connector, or you have the three-way switch in the "local" position, otherwise it won't turn on. -- Pete Peter Turnbull Network Manager University of York

23 years, 5 months

Paging AntionioC...

by Fred.van.Kempen＠microwalt.nl

pse drop me an email, I lost yours! --fred

23 years, 5 months

875 Power Controller/H7104C 2.5VDC PSU/H7104D 5VDC PSU

by pete＠dunnington.u-net.com

On Nov 7, 13:43, John Willis wrote: > Anyone have any documentation on these units as far as > What to do when the fail lights come on? The Field Maintenance print sets for the PSUs and the power controller are available at http://208.190.133.201/decimages/moremanuals.htm (part of the DFWCUG Historical CPU Preservation Society). They are BIG files. If an 875 power controller is like an 876, then if the lights don't come on, reset your breaker :-) I don't know about the H7104's (I've never seen one up close). I assume there is something plugged into the 3-pin Power Bus connector, or you have the three-way switch in the "local" position, otherwise it won't turn on. -- Pete Peter Turnbull Network Manager University of York

23 years, 5 months

VAX and Alpha K/V/M cables.

by allain＠panix.com

Hi, I'm looking to cable up an Alpha 3000/300 I just picked up and am checking on the DEC cable to do so. There are many: BC(C03,13B,18P,19S,23K) Do they all have the same pinouts at the D15 side? sim.: Is a mV2000, vS3100 cable OK on an Alpha? John A.

23 years, 5 months

875 Power Controller/H7104C 2.5VDC PSU/H7104D 5VDC PSU

by jwillis＠arielusa.com

Anyone have any documentation on these units as far as What to do when the fail lights come on? John Perkins Willis Software Engineer/Database Architect Ariel Technologies (505) 524-6860 jwillis(a)arielusa.com

23 years, 5 months

Repairing devices

by rigdonj＠cfl.rr.com

I checked around but I can't find any info on this model laser. Is there a date on it anywhere? Here <http://www.spectraphysics.com/products/cld_products/stabilite_series.html> is a link the the Stablite lasers on Spectra Physics website. There's also a phone number on that page. I would call them and get the specs for that laser and ask (1) if it's a hard sealed laser (2) if that's the right power suplly for it. Someone clould have just stuck any power supply with it and the wrong PS could certainly cause the problems that you're having. If that is the right PS ask them what the operating current, trigger and operating voltage should be. Joe At 10:07 PM 11/6/02 -0500, you wrote: >On Wed, 30 Oct 2002, Joe wrote: > >> Hi Pat, >> >> I'm assuming that your laser is helium-neon laser. If so, then if >> it's 23 years old it almost certainly has what they refer to as a >> soft seal between the electrodes and glass tube. The problem with the >> soft sealed lasers is that the helium atoms are small enough that >> they slowly leak out of the seal. When they do, the mixture ratio >> changes and the ignition and operating voltage goes up until the >> laser will no longer operates. That's what it sounds like is >> happening with your laser. Your's sounds like it's it border line in >> that the PSU firing voltage can make it fire but the operating >> voltage isn't high enough to keep it operating. > >The laser is a Spectra Physics Stabilite model 24B 35mW HeNe laser, and >the power supply is a Spectra Physics Laser Exciter model 255. > >That seems accurate. I've rigged up a 'line conditioner' to give me a >cheap pseudo-variac to change the input voltage to the laser power supply >(the supply is a simple transformer -> rectifier -> capacitor type with a >current regulator stuck on it, here's a PDF I found: >http://www.repairfaq.org/sam/255apsch.pdf > >Does anyone know what the specs are on that transformer (eg rated output >voltage), and how far I can (fairly-safely) run it above its rated input >voltage? Specifically, it'd be nice to know an upper limit so I don't >explode the HV caps or diodes. > >> Further you can't just use a resistor as a dummy load. The laser >> tube is similar to neon and floresent lights in that it has a >> negative resistance. That is it has a certain amount of resistance >> until it fires and then the resistance decreases dramaticly. You >> have to use a ballast with such devices or else the current will >> increase drasticly and almost instantly burn out the device. The >> ignition voltage will be on the order of 20,000 volts but the >> operating voltage will be roughly 12,000 to 14,000 volts. > >By looking at the schematic I linked above, it looks to run at a lower >voltage than that, but it's hard to tell without a HV meter or knowing >what the tranformer is outputting. > >> Be careful using a scope around these things. It probably isn't made >> to handle nearly the kind of voltages involved in the laser. You >> need a good high voltage probe for checking these things. You can >> use one made for TV repair. They're fairly easy to find and are >> reasonably priced. > >I wasn't going to scope the HV side, and since there is no LV side of the >power supply, I'm just not going to bother looking at it with a scope. >Besides, it's a simple enough circuit to troubleshoot with a HV meter. > >> If you send me the brand and model tube I may be able to tell you if >> it's a soft sealed tube and other details. >> >> Joe >> >> At 04:38 PM 10/30/02 -0500, you wrote: >> >I know this is a bit OT, becuase it's not really computer related, but the >> >hardware is at least 23 years old, so that's my excuse for posting to the >> >list... >> > >> >I've got a 35mW HeNe Laser + Power supply that I picked up today for next >> >to nothing. It seems to be having some problems - the laser (somtimes) >> >blinks a few times when I first turn it on, and then stops. From the >> >sound of the power supply it's either a loose connection (which I doubt >> >after opening it up and taking a good look around) or there's a problem >> >with the power supply. >> > >> >Now, I've never really worked on a HV power supply before, and I'm trying >> >to be careful when I play with things. First off, does anyone have a >> >general idea of what sized dummy load ("resisitor") I should try haning >> >off of the HV output to properly load it? I noticed that the laser tube >> >has 3x27kohm resistors in series, would a couple watt approx 81kohm >> >resistor be a good idea? >> > >> >Also, does anyone have an idea for a failure mode to look for? I've got >> >an O'scope, dmm, and various other tools at my disposal, but no >> >'authentic' HV test/mesurement gear. >> > >> >I'm just looking for general guidelines. >> > >> >Thanks! > > >Pat >-- >Purdue Universtiy ITAP/RCS >Information Technology at Purdue >Research Computing and Storage >http://www-rcd.cc.purdue.edu > >http://dilbert.com/comics/dilbert/archive/images/dilbert2040637020924.gif > > >> > >

23 years, 5 months

cctalk digest, Vol 1 #259 - 6 msgs

by foxnhare＠bigvalley.net

Well, here's my "me too VCF writeup," with pictures of VCF and the computer museum for those who can't get enough... http://www.portcommodore.com/vcf5/ Larry P.S. ...and the final programs from the programming challenge! -- 01000011 01001111 01001101 01001101 01001111 01000100 01001111 01010010 01000101 Larry Anderson - Sysop of Silicon Realms BBS (209) 754-1363 300-14.4k bps Set your 8-bit C= rigs to sail for http://www.portcommodore.com/ 01000011 01001111 01001101 01010000 01010101 01010100 01000101 01010010 01010011

23 years, 5 months

cctalk free stuff -- AIM65

by r_beaudry＠hotmail.com

>I want the AIM-65. Sheesh! ... EVERYONE wants the AIM-65.... The random number generator is going to be thoroughly stresed out over the weekend! :-) Rich B. _________________________________________________________________ Add photos to your e-mail with MSN 8. Get 2 months FREE*. http://join.msn.com/?page=features/featuredemail

23 years, 5 months

Fwd: Terminal documentation

by jss＠subatomix.com

I saw this on the info-pdp11 list and thought some of our repository managers might like his manual to scan or stow. Contact Rob directly, please. ---------- Begin forwarded message ---------- From: Rob Brown <brown(a)gmcl.com> To: info-pdp11(a)village.org Date: Wednesday, November 6, 2002, 8:50:08 PM Subject: Old documentation I have in my hand a "Vision II 3220 User's Manual" which describes a VT220-type terminal from Lanpar Technologies (or maybe Northern Technologies, both names are used). Probably around 100 sheets, two-sided. Is there any repository that would like to have this? -- Rob Brown brown(a)gmcl.com G. Michaels Consulting Ltd. (866)438-2101 (voice) toll free! Edmonton (780)438-9343 (voice) (780)437-3367 (FAX) http://gmcl.com/ ---------- End forwarded message ---------- -- Jeffrey Sharp

23 years, 5 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