MARCH's PERQ-1 is missing the keyboard and control tablet. Does anyone
have those that we could borrow, in order to bring up the system? We're
looking to work on it in June this year.
Hello,
As of late I've been looking for the following parts for the following SGI
systems:
- SGI Indigo?
o video-graphics flat/flexcables (very important, need it);
o IMPACT Video break-out cable;
o IMPACT Video stand-offs (10);
o IMPACT pull straps (3 sets, but 'just' 2 for HighIMPACT is
also
fine for me);
o IMPACT Video screws (10 also, but not as important);
o IMPACT "Digital Media CD" (... or if someone could tell me
what's on there).
- SGI O2
o blue optical (i.e. CD-ROM) drive bezel;
o black top lid;
o two or three disk sleds/brackets;
o analog A/V (AV1) module (not too important).
Interested to buy, but I have items to trade (compatible in/for SGI
O3000-series, for instance; like 10-Gbit Ethernet NICs).
Lastly, I'm located in the Netherlands. Thanks in advance.
Kind regards,
Marco
My HP 7970E mounting bracket is at the fabricator, so hopefully copies will
be ready soon. I'll keep the folks posted that asked for a bracket. That
means if anyone wanted a mounting bracket but didn't respond to my earlier
post, you need to let me know by end of day today. It is unlikely that
another run will be done in the future.
Separately - on the other side of the 7970E tape chassis are three metal
shims. They are normally attached with glue to the back lip of the chassis
edge where it mounts to the rack on the right side. I have noticed over time
that on some drives one or more of these shims have come off and been lost.
Another listmember (THANK YOU) fabricated a few of these shims. If you need
these, I have a few extra that are available for the cost of mailing (aka
$0.00). Once I run out of those few, perhaps the listmember that fabricated
them would be willing to make a few more if there is a need.
Best,
J
I don't understand the role of the M8162 "Port MUX A module" and M8163
"Port MUX B module" that the field-guide claims to be part of the MK11.
They aren't part of the MK11 as far as any documentation that I've read
regarding it. At least the M8162 has a pair of 20ma-style SLU connectors
on it, but no UARTs that I can see.
Do these modules really belong to the MKA11, rather than the MK11? Or to
something else entirely?
Is the MKA11 (which I can't find documented online) a revised MK11? The
field-guide seems to imply this given its entry for the M8164 which
basically reads like this:
M8158 MK11 U Address buffer module
M8159 MK11 U Data buffer module
M8160 MK11 U Control A module
M8161 MK11 U Control B module
M8162 MK11 U Port MUX A module
M8163 MK11 U Port MUX B module
M8164 MK11/MKA11 U Data buffer module (Replaces M8159)
It seems to me that something is incorrect in the field-guide, but none of
my researches have identified where the error is and what the right
answer(s) might be.
Anyone here have any experience/knowledge with/of the MKA11 and/or the
M8261/M8163?
Thank you,
paul
> From: Paul Birkel
> Note that 1170mP_Jul77_text.pdf also includes some additional MKA11
> information, and improved diagrams.
Umm, where is that? I just looked, couldn't find it online? (Clearly my
Google-fu is pretty weak... :-)
Noel
I have an older (dark grey) HP rack that has a front door on it. The top
2/3rds of the door is closed off metal (dark cream color). The bottom 1/3rd
is a dark brown/grey plastic vent. In the area that is vented, I'm missing
one of the vent/slotted panels to fully close it off. I used to have a 7900A
drive sticking through this opening, but no more (not in the current
configuration being built).
I'm building a machine to (hopefully) take to a VCF show, and would like to
obtain another one of those vent panels to properly fill up the opening.
Ideally, I'd like to buy/trade for one of those panels and keep it. But if
you have one that you don't want to let go of, I'd at least like to borrow
it for a few months for the show and then could return it.
Does anyone have one of these plastic vent panels?
Best,
J
I made an inventory of the defective TTL?s I have, other than I initially though there is a reasonable spread over types and brands.
Other than the NS DM7400 there are no types with an extensive failure rate.
The list talks for itself.
-Rik
Type
HP Number 1820-
Quantity
Brand
CER
Date
7495AN
1
Siemens
7417
8H08/74H08
1
??
PCF7427
93L00PC
1
7302
9N03/7403
1
Fairchild
7328
DM7400N
14
National Semiconductor
352,422,424,401,351,435,315,215
DM7403N
4
National Semiconductor
315
DM7404N
5
National Semiconductor
317,315
DM7408N
2
National Semiconductor
307
DM7410N
2
National Semiconductor
308,217
DM74121N
6
National Semiconductor
313,315,314
DM74195N
1
National Semiconductor
241
DM7420N
1
National Semiconductor
211
DM7432N
2
National Semiconductor
314,413
DM7474N
5
National Semiconductor
435,349
DM7493N
1
Texas Instruments
7252
DM7495N
2
National Semiconductor
242,241
DM74H00N
1
National Semiconductor
334
DM74H08N
1
National Semiconductor
229
DM74L00N
1
National Semiconductor
337
DM74L04N
3
National Semiconductor
313,351
DM74L10N
1
National Semiconductor
423
DM74L74N
1
National Semiconductor
316
DM74L86N
1
National Semiconductor
317
DM74LS373N
1
National Semiconductor
8005
N8885A
1
Signetics
7402
N8T20N
1048
1
Signetics
7915
SN7400J
1
Texas Instruments
7313
SN7400N
2
Texas Instruments
7405,7335
SN7402N
1
Texas Instruments
AS7419
SN7404N
3
Texas Instruments
7344,7402,AS7406
SN7406N
0471
1
Texas Instruments
8044S
SN7407N
0668
2
Texas Instruments
H7845,AS7414
SN74107N
2
Texas Instruments
7945B,7414
SN74121J
1
Texas Instruments
X
7326
SN74123N
0579
4
Texas Instruments
7406,8014
SN74155N
2
Texas Instruments
7222
SN7416N
1
Texas Instruments
AHA741
SN74191N
1
Texas Instruments
M7628
SN74193N
3
Texas Instruments
FF7606,FF7536
SN74193N
1
Texas Instruments
7516
SN7451N
1
Texas Instruments
7427
SN7474N
1
Texas Instruments
7339
SN7475N
1
Texas Instruments
7349
SN7493AN
1
Texas Instruments
7235
SN7493AN
1
Texas Instruments
AS7344
SN7495AN
4
Texas Instruments
BS7402,7227,7244
SN7495N
1
Texas Instruments
7401
SN7496N
1
Texas Instruments
M7331
SN74H00N
1
Texas Instruments
7135
SN74H01N
1
Texas Instruments
BS7423
SN74H01N
1
Texas Instruments
7252
SN74H04N
2
Texas Instruments
7527,AS7406
SN74H101N
2
Texas Instruments
7217,7336
SN74H108N
1
Texas Instruments
7205
SN74H40N
1
Texas Instruments
7510
SN74H74N
0512
1
Texas Instruments
7419
SN74L04N
2
National Semiconductor
218,313
SN74L42N
1
Texas Instruments
7312A
SN74LS00N
1
Texas Instruments
M7523
SN74LS03N
3
Texas Instruments
7945
SN74LS08N
1201
1
Texas Instruments
7801
SN74LS244N
1
Texas Instruments
8432B
SN74LS257AN
1438
1
Texas Instruments
7927B
SN74S04N
1
Texas Instruments
UK7949
SN74S374N
2
Texas Instruments
M7919X,F9022X
7400
0054
1
Motorola
7315
7410
0068
2
Motorola
7245,7443
7473
0075
1
National Semiconductor
217
7474
0077
2
National Semiconductor
212
74H08
0141
6
National Semiconductor
228,217,604,229,228
MC3001
0141
1
Motorola
7326
7404
0174
1
National Semiconductor
543
7405
0175
1
National Semiconductor
037M
7405
0175
1
National Semiconductor
947
MC3003 / 74H32
0205
1
Motorola
7513
74121
0261
1
Texas Instruments
7410
74121
0261
1
National Semiconductor
425
7403
0269
4
National Semiconductor
345,428
CA3028A
0306
1
National Semiconductor
413
7402
0328
2
National Semiconductor
527,532
7402
0328
1
Motorola
7248
74H00
0370
1
Motorola
7413
74H00
0370
1
Fairchild
7237
74H40
0376
1
Motorola
7334
74H04
0424
1
National Semiconductor
231
7408
0511
6
Fairchild
F7421,F7407,F7409,F7428
7413
0537
1
National Semiconductor
533
74L00
0583
1
National Semiconductor
521
74L02
0584
3
National Semiconductor
222,231
74L10
0587
1
National Semiconductor
514
74L30
0589
1
National Semiconductor
232
74L54
0591
1
National Semiconductor
521
74L74
0596
1
Fairchild
X
SL3459
74L86
0598
3
National Semiconductor
405
9322PC
0616
1
Fairchild
352
9322PC
0616
1
Fairchild
X
7221
9324PC
0706
1
Fairchild
7735
9328PC
0741
2
Fairchild
X
7240,7309
74C175
1562
2
Signetics
L147,B104
74C175
1562
1
National Semiconductor
011
-----Oorspronkelijk bericht-----
Van: "Kyle Owen" < <mailto:kylevowen at gmail.com> kylevowen at gmail.com>
Verzonden: ?11-?2-?2015 23:57
Aan: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
Onderwerp: Failed ICs and components
I am writing my master's thesis on accelerated life testing and would like
to get a collection of parts to decap and experiment on. What prompted my
study is a failed 7474 dual flip-flop in a PDP-8/E. As I later read (on
here, I believe) was that the 7474s seem to fail in higher number than
other 7400-series ICs. Is this because of a design flaw? I'm not sure
(yet), but would like to find out.
More recently, I saw a 680k 2W carbon resistor that read 1.3 meg out of
circuit. As it turns out, it was in a high voltage portion of the circuit,
and I suspect that electromigration caused its failure over time. Many of
you are probably already aware that carbon resistors tend to increase in
value as they age, though there are a few explanations too for that
behavior, as I understand it.
I would like to tie all of this together by researching older accelerated
life testing schemes, examine how those parts actually fared, and see how
current day models might be improved.
If anyone has a collection of dead ICs (preferably those that have died
inexplicably, and not by extreme overvoltage, for instance), I would like
to talk to you about getting a few. If they are 7474s from Texas
Instruments, ca. early 1970s, even better!
Thanks in advance,
Kyle
I have an LA12 that's mising the "DATA/TALK" key. Does anyone have or know of
a junked LA12 keyboard from which I can take that key? Failing that, would a
VT100 key physically fit? How about 3D-printing the key?
--
David Griffith
dave at 661.org
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
