>
> Date: Mon, 17 Jun 2013 07:22:28 -0400
> Subject: Re: Five PDP-11 Questions
> On 16 June 2013 21:35, Al Kossow <aek at bitsavers.org> wrote:
> > I've used 28 or 30. 30 is more common, 28 doesn't break as easily.
> >
>
> Thanks, I'll be sure to remember that! I need to buy a wrap tool, and
> I wanted to know what the "correct" size is.
>
30 AWG is for modern wire-wrap. 24 AWG is for older systems and controllers
like the Classic PDP-8, PDP-9, TC01, TC02, TC58, and TC59.
> Michael Thompson
Hi all,
The LA-120 Decwriter that I got off Craigslist a couple of weeks ago has a dead H7150 power supply. Transistors Q1 and Q2 are open and shorted, respectively, and fusible resistor R4 is open. I'd guess that failure of Q2 led to the other two parts going.
Q1 and Q2 are high voltage NPN power transistors in TO-3 cans, labeled
__
81 [ti logo] 41 (or maybe 4I but I'm guessing for a date code, 41)
R3004
BRITAIN
DEC part number appears to be 15-12782-00. The printset identifies them as "NPN 100W S1325 15". I can't find any substitution info online. There is a NOS pair for sale on eBay. So that's one option. Does anyone know what the modern equivalent(s) are? And what if you do, where did you find the reference?
Thanks,
Brian
This was just posted to the rescue list and I am not sure it has been
mentioned here before but, they have a nice Cray setup If someone is
around to turn on the lights for you anyway. Some actual museum should
try and grab this gear.
http://www.flickr.com/photos/shatle/sets/72157634133969978/
----- Original Message -----
> Date: Mon, 17 Jun 2013 09:57:22 -0400
> From: Dave Woyciesjes <woyciesjes at sbcglobal.net>
> Dave McGuire <mcguire at neurotica.com> wrote:
>>I'll be back when my stress level drops a bit, or when the jerks leave,
>>and when there's something to talk about.
> I, for one, will miss your input. Come back soon.
I wouldn't worry; I don't think he'll be gone long ;-)
For the record, despite his intolerance I like Dave (and have expressed that
privately), appreciate the contributions he makes to the list and the hobby,
and even enjoy following many of the OT threads on this list and the insight
they give into different peoples' attitudes and perceptions in this
particular niche of social networking (at least until they become utterly
boring and repetitive and/or downright nasty).
It's unfortunate that my coming to the defence of people like myself who
apparently "suck" and posting those *amusing* statistics and congratulating
him on being the clear winner in the post sweepstakes (emphasis on
'amusing') was seen by him and others as an "attack" and just provoked
insults and counterattacks, with Dave taking his ball and sulking in the
corner.
But if it results in fewer banal, confrontational and same-old-same-old
posts on the list and less stress for Dave and more time to spend on his
more pressing matters, then that's a good result all around.
Meanwhile, let's all lighten up.
> The printset identifies them as "NPN 100W S1325 15".
Aha - SI = Silicon, and so on. I vaguely remember that thread now.
> So I guess you're looking for a silicon NPN transistor with 100W
> max power dissipation, a Vceo of 325V or better, and an hFE about
> 15 (and the right pinout!). Tony or one of the other PSU gurus can
> probably suggest something that'll do the job?
Likely candidates might be (from parametric search on newark.com):
BUX80, BUY69A, 2N6308, 2N6547, then.
Anyone know of any contraindications for any of these?
I'll see what Al Lasher's Electronics in Berkeley has on hand before I
shop the interwebs.
I picked up a pair of later-model TI-1500 workstations (a 1505 and 1507)
nearly a year ago, and I meant to post these photos at the time but
never gotaround to it. Was reminded of them while cleaning up some old
photos on my camera. Just in case anyone's curious, here's what the
inside of one of these looks like.
https://plus.google.com/u/0/photos/117997069161125071032/albums/58902360564…
If anyone wants more detailed photos, let me know and I'll see what I
can do.
(Still searchingfor software...)
- Josh
Hi --
Since this is the ccTALK list, and I can therefore post about whatever I
want (per Dave), Iwas wondering what kind of underwear y'all prefer?
Personally, I prefer tighty-whiteys, but I'm afraid they might not be
trendy enough.
Thanks,
Jsoh
The jerk factor on this list has become so high of late, and the clue
factor so low, that I will take a respite for a bit.
It seems I can no longer resist the attempts by jerks to get a rise out of
me. Actually, I should say the "rise-able" people here in general, as I
don't feel singled out, except by Mike Stein this morning...I'm just a bit
more "rise-able" than I should be. But either way, for that I apologize.
I'll be back when my stress level drops a bit, or when the jerks leave, and
when there's something to talk about.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
----- Original Message -----
> Date: Sun, 16 Jun 2013 16:54:53 -0500 (CDT)
> From: Tothwolf <tothwolf at concentric.net>
>> On Sun, 16 Jun 2013, MikeS wrote:
...
>> It just seems that seven or eight people have 'taken over' the list as a
>> forum for their often lengthy and OT opinions and arguments, while I see
>> familiar people with much to contribute leaving and appearing on other
>> lists instead and citing the above 'noise' as the reason (not to mention
>> the folks still here begging them to keep it down and on topic).
>>
>> A shame IMO.
>
> Oh no you don't.
>
> I've been here long enough to have witnessed first hand that no matter
> -what- computer-related topic comes up, /someone/ on the list is going to
> take offense to the topic under discussion.
----- Reply: -----
I don't know where you get the idea that I (and Josh) are *offended* by
anything; the only person who seems to be offended is Dave...
Being called a moron and a jerk and being told that I suck because I don't
see anything necessarily wrong with scrapping a system for parts could
certainly be considered rude and offensive, but that really just reflects on
the name-callers' character and maturity.
There's no question that pretty well everyone on this list has things to
contribute, including and sometimes especially Dave and the above-mentioned
high posters; what I (and, I think, Josh) are suggesting is that the noise
level gets pretty high sometimes and that perhaps the relatively few people
creating most of the noise might take a moment to think whether that
opinion, argument, whatever, is really worth the bandwidth and time to post,
not to mention the replies that it will provoke.
But predictably, it's just like asking the neighbours to please keep the
noise down a bit; the usual reply is a hostile "go f$%k yourself" and the
noise gets cranked up even more.
I still think that it's a shame when the noise drives valuable people to
other, friendlier, lists with higher S/N ratios; they don't seem to be
missed by anyone else here and I'm on those lists as well, so no problem I
guess.
IMO, other than for HP and DEC issues CCtalk is becoming less and less
relevant to many members of the community, but perhaps that's as it should
be...
So, no, I'm not offended; I'm also subscribed to CCtech so I can choose to
just read the 'edited' version, or even unsubscribe altogether if I do get
too annoyed or even "offended."
Back to our regular programming...
m
----- Original Message -----
> Date: Sun, 16 Jun 2013 22:30:40 +0200
> From: Pontus <pontus at update.uu.se>
> MikeS: You seem to have quite a bit of time yourself, counting all those
> mail....
Well, yes I did (it was a Saturday), but it didn't take very long, even on a
486 running DOS; I was curious, it was a fun quickie program to write and I
thought maybe someone else on the list would be amused as I was;
unfortunately, and perhaps predictably, Dave was not amused by being the #1
poster and saw it as an "attack" instead.
Year to date is even more impressive: 513 posts with the third place entry a
paltry 285; surprisingly, Fred is #2 with 335, but his are usually short and
funny.
----- Original Message -----
> Date: Sun, 16 Jun 2013 16:44:13 -0400
> From: Dave McGuire <mcguire at neurotica.com>
> I'll be back when my stress level drops a bit, or when the jerks leave,
> and
> when there's something to talk about.
You're only going to post when there's actually something to talk about ???
Who could ask for more! ;-)
Definitely, get that stress level down; it's bad for your health!
Best wishes,
m
*also* meant toshare these. Scanned in all of the boards in my Imlac
PDS-1D for reference purposes, since there are very few of these out
there (and schematics, but no PCB layouts.)
https://plus.google.com/u/0/photos/117997069161125071032/albums/58762337385…
I have high-res(600 dpi) scans if anyone wants them. Sure, it's
overkill but why not...
- Josh
Date: Sun, 16 Jun 2013 00:20:34 -0400 (EDT)
From: Mouse <mouse at Rodents-Montreal.ORG>
> I don't consider time spent discussing the hobby to be wasted. If you do,
> as your wording seems to imply, I have to wonder, why are you here?
For the occasional post that is actually related to 'Classic Computers', as
opposed to the endless kvetching about (other) people, 'PeeCees', M$ etc.,
recurring intolerant arguments about the 'best' way to do anything, vanity
posts from folks who think we're interested in their opinions about just
about everything, etc.
It just seems that seven or eight people have 'taken over' the list as a
forum for their often lengthy and OT opinions and arguments, while I see
familiar people with much to contribute leaving and appearing on other lists
instead and citing the above 'noise' as the reason (not to mention the folks
still here begging them to keep it down and on topic).
A shame IMO.
m
I am the original owner of a Tally 2000 line printer that is free for
pickup in the Baltimore, MD (USA) area. The printer has a 128 character
set, a parallel differential interface, and was in regular use with an HP
1000 minicomputer from 1977 until it was decommissioned in 1994. Since
then, it has been stored in a heated and air conditioned office pending
refurbishing, which I no longer have the time to perform. At
decommissioning, the printer was operational but was beginning to
substitute characters, probably due to an error in the logic of one of the
character data lines. The HP 2607 was a rebadged Tally 2000.
The printer is complete with a stand, wire paper basket, and operator and
service manuals. Weight is approximately 150 pounds. Due to an office
move, it must go by June 29th or it will be scrapped.
The operator's manual is online here:
http://www.hpmuseum.net/document.php?hwfile=4090
I'd prefer to see it go to a good home rather than being pushed off our
dock into the dumpster. If you're interested in picking this unit up,
please contact me at <jdbryan at acm.org>.
-- Dave
I'm trying to add XT KB support to a project here, and I am having
trouble sorting out a few scan codes. A response over at the VC Forum
notes I should grab these two references, so I am wondering if anyone
has a link or soft copy.
I created my PS2/XT mapping using this matrix:
http://ilkerf.tripod.com/c64tower/F_Keyboard_FAQ.html#KEYBOARDFAQ_037
And that matches up with ChukG's AT2XT project, except for '\' (the link
has it as decimal 29, Chuck's project has it at 42, and he has 0x61 PS/2
code mapped to decimal 45 XT code. I don't know either of those codes.
But, that mapping does not match up with most of the maps on the net.
Jim
--
Jim Brain
brain at jbrain.comwww.jbrain.com
Hi all,
The LA-120 Decwriter that I got off Craigslist a couple of weeks ago
has a dead H7150 power supply. Transistors Q1 and Q2 are open and
shorted, respectively, and fusible resistor R4 is open. I'd guess that
the failure of Q2 took out the other two parts.
Q1 and Q2 are high voltage NPN power transistors in TO-3 cans, labeled
__
81 [ti logo] 41 (or maybe 4I, no matter, it's a date code)
R3004
BRITAIN
The DEC part number is 15-12782-00. The printset identifies them as
"NPN 100W S1325 15". I can't find any substitutions online for either
R3004 or S1325. (Or 15-12782-00 for that matter).
There is a NOS pair for sale on eBay. So that's one option. Does anyone
know what the modern equivalent(s) are? And what if you do, where did
you find the reference?
Thanks,
Brian
I have a PC used (or at least intended) for floppy transfers, which has
a hard drive booting MS-DOS 6.22, with an 80-track 5.25" drive and a
3.5" drive connected to a WDAT-240 controller. It has the MS-DOS
network stuff installed so I can connect to a shared network drive.
It's also got a CDROM drive on its second IDE bus, and the corresponding
lines for the driver and MSCDEX are in CONFIG.SYS and AUTOEXEC.BAT.
Most of the drivers etc are loaded in high memory (I ran MEMMAKER in the
dim and distant past).
At the moment, those two lines are commented out because if they're not,
the floppies don't work properly. Has anyone got any idea why? The
CDROM works fine if I uncomment those lines (but the floppies don't) and
network shares work fine either way.
--
Pete Peter Turnbull
Network Manager
University of York
----- Original Message -----
Date: Sat, 15 Jun 2013 21:30:25 -0400
From: Dave McGuire <mcguire at neurotica.com>
> But like I said, I type fast. Nine seconds on this one. And you know
> what? I'll make my money anyway.
> Will you?
I'm doing OK; *you're* the one who doesn't have an extra $200 to spare or
you'd "have scored that auction in a heartbeat"...
Sorry to hear it, really; hope you manage to put a little aside for the next
time.
> Moron.
Ah, the usual name-calling... you are predictable, I'll say that; even funny
sometimes ;-).
'nuff said; have a nice weekend!
m
Well, I for one enjoy that you consistently add value, so don't drop off for too long.
Also, while you're off the main list, don't forget about that 3B2, and let me know if you catch wind of a 3290... :) hehe.
Thanks much, as always!
-Ben
________________________________________
From: cctalk-bounces at classiccmp.org [cctalk-bounces at classiccmp.org] on behalf of Dave McGuire [mcguire at neurotica.com]
Sent: Sunday, June 16, 2013 1:44 PM
To: On-Topic and Off-Topic Posts
Subject: Dropping offline for a bit.
The jerk factor on this list has become so high of late, and the clue
factor so low, that I will take a respite for a bit.
It seems I can no longer resist the attempts by jerks to get a rise out of
me. Actually, I should say the "rise-able" people here in general, as I
don't feel singled out, except by Mike Stein this morning...I'm just a bit
more "rise-able" than I should be. But either way, for that I apologize.
I'll be back when my stress level drops a bit, or when the jerks leave, and
when there's something to talk about.
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
I was curious...
Out of 143 people who posted to the list in the first half of June, 116
posted 5 times or less.
On the other hand, only 9 people (and we know who they are ;-) are
responsible for half (462) of the total 923 posts, with Dave easily the
winner...
Must be nice to have so much time to waste...
There are a number of problems with describing scancodes unambiguously,
particularly when it comes to the backslash. Depending on the layout, it
could be found at:
Scancode in set | 1 | 2 | 3 |
--------------------------------------------------+----+----+----+
* The key above "Tab" | 29 | 0E | 0E |
* The key between "=" and "Backspace" | 7D | 6A | 5D |
* The key below "Backspace" and above "Return" | 2B | 5D | 5C |
* The key to the left of "Return" | 2B | 5D | 53 |
* The key between "Left Shift" and "Z" | 56 | 61 | 13 |
--------------------------------------------------+----+----+----+
An 84-key AT keyboard will return the Set 3 codes for these positions.
--
John Elliott
----- Original Message ----- >
> Date: Sun, 16 Jun 2013 11:10:47 -0500
> From: John Foust <jfoust at threedee.com>
> If it's difficult to ship the larger item, and easy to disassemble,
> and there's a market for the parts, and it's easier to ship the parts,
> and you have too much time on your hands and don't value your time,
> then why not part it out? You can tell someone you got a sum total
> of $300 for all the pieces when they assured you you'd only get $100
> for the original.
Of course.
Unless it's a 'real' classic like the Apple I, most of the time just a few
parts will sell more easily and for more money than the system they came out
of, especially with today's shipping costs and hassle, so from a financial
perspective it makes a lot of sense to part out.
Even from the hobbyist perspective it make sense to make parts available;
often scrapping one machine will yield the parts to get three or four other
machines running again.
And of course the very people who condemn folks for breaking systems down
for parts are often the first to snap up those parts when they need them...
m