I found a service manual for Motorola M1000 and M2000 series CRTs. It's
photocopied, so I'm not sure if it's complete. It's 18 pages long,
copyrighted 1979. Anyone want it?
>Anybody have a junker TK50 with the plastic tape leader still intact? Or,
>does anyone have a NOS part? I would like to buy that part to repair my drive.
Part number 74-28268-01, $1.00 each from DECDirect (1-800-Digital).
A valuable resource is Digital's Assisted Services catalog search;
see http://www.digital.com/info/DAS-Catalog/
--
Tim Shoppa Email: shoppa(a)trailing-edge.com
Trailing Edge Technology WWW: http://www.trailing-edge.com/
7328 Bradley Blvd Voice: 301-767-5917
Bethesda, MD, USA 20817 Fax: 301-767-5927
> In particular I was reviewing my MICRO magazines (that
> deal with the KIM, PET, and various 6502 systems).
Coincidence - I just did the same - I took the years 1978
to 1981 with me on a busines trip to have something to
read ... I hate this evenings in dump hotels ind small
cities (like Paderborn) where they close everything at
sundown.
> I noticed that the latest copy I have is issue #18. I was
> wondering if anyone knew if there were issues beyond
> this or if the name of the magazine changed into something
> else and I'm just not making the connection?
No, they continued, but the quality improved (at least
they took more expensive paper).
> By the way, in the range of issues #1-18, I am missing
> issues #15 & #16. I do however have duplicates of some
> of the other issues. If anyone has duplicates of those two
> issues, in good shape, and you're interested in trading,
> one-for-one, let me know which issues you need and I'll
> see if that's one of the ones that I have duplicates of.
I will have a look, but this might take some times, since
the duplicates are stored at another place.
Servus
hans
--
Ich denke, also bin ich, also gut
HRK
Anybody have a junker TK50 with the plastic tape leader still intact? Or,
does anyone have a NOS part? I would like to buy that part to repair my drive.
Mine has broken on one side of the position aperature through which the
photodiode detects its position. Looks like it has been broken awhile as
the tips of the break are a bit rounded with wear from the previous owner
continuing to use it (probably never knew it was broken). I don't want to
take a chance with it breaking on me while most of a tape is wound up on
the takeup spool!
Thanks, Chris
-- --
Christian Fandt, Electronic/Electrical Historian
Jamestown, NY USA cfandt(a)netsync.net
Member of Antique Wireless Association
URL: http://www.ggw.org/freenet/a/awa/
>> Coincidence - I just did the same - I took the years 1978
>> to 1981 with me on a busines trip to have something to
>> read ... I hate this evenings in dump hotels ind small
>> cities (like Paderborn) where they close everything at
>> sundown.
> So how was the Heinz Nixdorf Museum?
Haven't been there this time, but it's nice, althrough
my kind of computer museum would be a bit more on the
variety of the 70s and 80s focused. Also the HNF Computer
Museum is a _bit_ company specific (ok, not as much as the
Tupperware Museum). Son't get me wrong, it is still VERY
impressive and the most comprehensive of all existing
Computer/Information Technology museums in the world (at
least compared to everything I have seen until now). And
compared to the computer department of the Deutsches
Museum, all displays are finished in an usefull way (As
you might have noticed, I'm still mad about the displays
at the Deutsches Museum).
Servus
Hans
--
Ich denke, also bin ich, also gut
HRK
> Another one - How do you test supplies and various heater controls that
have
> to float at 8Kv? I.E.: their common point is at 8Kv. Especially when
they
> are intermittent and you can't tell without the HT on exactly when it is
> acting up. VERY carefully float your meter at kV and be very sure you
don't
> touch the meter and don't do like I did and get to near the leads while
> operating the instrument while waiting for the intermittent to act up.
An
> 8Kv @ 5ma with 1ppm stability supply burns holes on the way in and out.
In
> the arm and out the finger.
I'd recommend:
1. Get one of those rubber holsters for the meter and allow only the
holster to touch the equipment.
2. Make some test leads out of EHT wire. The sort of stuff that's used
for the anodes of CRTs and things. Maplin used to sell it (haven't checked
recently), rated at 25 kV, and I'm sure other suppliers do too.
3. Failing no. 2, car engine HT leads may be useable, but most of them are
quite rsistive, so check the calibration!
Philip.
>This time it's the PDP-11/34A system. I was able to get it checked out and
>lit up okay. It has the Programmers Console (KY11-LB) and an M9312
>Bootstrap/Terminator module plus RK611 and UDA50 drive interfaces.
>Switch 2 is OFF on the 9312 therefore, registers printout onscreen and the
>system prompt (@ in this case) appears after CNTL/BOOT keys are
>simultaneously pressed. Seems okay so far. However, the 11/34-11/34A user's
>manual says the prompt should be a '$' (?).
Hmm - "$" is what I've always seen with the 11/34A ROM's. Is
it possible that you aren't running the standard 11/34A ROM's?
What are the DEC ROM numbers on your 9312? The part numbers
will be of the frm 23-nnnA9, where "nnn"=752 for the RK06/07
bootstrap. Sometimes the "23-" is left off.
But the register printout is correct...
>Upon trying to boot the thing I am instructed to simply type DM onto the
>terminal and the 11/34A will boot off the RK07 #0. Well, nothing happens.
Does the DM echo? What if you type some nonsense characters - like YY?
Tim. (shoppa(a)trailing-edge.com)
-----Original Message-----
From: Tony Duell <ard(a)p850ug1.demon.co.uk>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Thursday, 19 November 1998 9:14
Subject: Re: Newbie's got a dead 386
>> footnote: My then boss had "borrowed" the isolation transformer it was
>> plugged in to while I was working on it, without telling me. (!)
>
>Had anyone done that to me, they would have been on the wrong end of a
>suitable LART as soon as I had picked myself up...
On topic, I've tinkered with a number of monitors, and some really old
ICL Terminals that we maintained for a small company in town that had
some strange system. They had some interesting fault modes.
(Circuit diagrams were non-existant of course)
Ok, I'll bite, what in heck is a LART.
I've seen this in NANAE but have no idea what it means in this context.
I should also mention that when I got home that afternoon, after I realized
just
how close I came, I made a quiet phone call to the Dept of Labour and
Industry,
suggesting that this person was running what was effectively :
1) a sweat shop (we were on piece rates)
2) had people working on mains/high voltage equipment without proper
safeguards.
What annoyed me the most was that there was 1 ELCB in the whole
place. Guess who's bench had it. Yep. The boss.
He got a surprise visit the following week from a surly little inspector who
went through the place like a dose of salts. Not sure how much it cost
him in the end, but I know it hurt. I got 4 months back pay and some
public holiday money paid. We got ELCB's for all the work benches and
2 isolated outlets per bench for hot chassis stuff.
(We'd been asking for this for MONTHS, and were always told, nah,
just be careful, you'll be right.)
Cheers
Geoff Roberts
Computer Systems Manager
Saint Marks College
Port Pirie South Australia.
My ICQ# is 1970476
Ph. 61-411-623-978 (Mobile)
61-8-8633-0619 (Home)
61-8-8633-8834 (Work-Direct)
61-8-8633-0104 (Fax)
>
>_Every_ shock I've had has been my own fault for being an idiot. And in
>most cases an ELCB wouldn't have helped at all...
>
It sure would not have helped with one of the worst ones I had. 1900Vdc
Electron mult. supply that appeared to have failed (instrument symptoms).
Hooked up meter (rated for 2Kvdc) turned on supply, walked behind instrument
to read meter, it read approx 40V - the way it usually fails. Figured the
supply was dead so why go all the way around the instrument again (40+ foot
obstacle course) to shut off the supply. I went to disconnect probes and
found out the supply was not dead but the meter was dead. Took about 2 days
for the cramps to quit.
Another one - How do you test supplies and various heater controls that have
to float at 8Kv? I.E.: their common point is at 8Kv. Especially when they
are intermittent and you can't tell without the HT on exactly when it is
acting up. VERY carefully float your meter at kV and be very sure you don't
touch the meter and don't do like I did and get to near the leads while
operating the instrument while waiting for the intermittent to act up. An
8Kv @ 5ma with 1ppm stability supply burns holes on the way in and out. In
the arm and out the finger.
Dan
>> Hey, speaking of Nixdorf. I have a Nixdorf LK-3000 "computer". It looks
>> more like a calculator. Does anyone know anything about these? It has an
>> "Information Module" in it about the Summer Olympics.
> Cool! Another one! I have an LK-3000, with the Appointment Book
> module and a Word-translation Module (German-English,
> Spanish-English) and the instructions, etc... still works nicely. I
> tried Nixdorf's site, but of course, the little LK is paleolithic
> now....
> Anyone have any amplifying data on these? Herr Franke perhaps?
They have been somewhat popular over here as translators in the
early 80's - somewhat because the price was at least 50% more
than any other device in this class. It was a try of Nixdorf
to get some hold with consumer products.
No, I found no actual data in our archives, but since this
product was canceled long before SIEMENS bought NIXDORF, no
information may ever have been added. But I startet some
search aktivities. This might take some time.
Gruss
Hans
--
Ich denke, also bin ich, also gut
HRK
