On Wed, Jul 29, 2015 at 03:26:00PM -0700, Ian McLaughlin wrote:
>
> > On Jul 29, 2015, at 3:10 PM, drlegendre . wrote:
> >
> > Parts that were once the size
> > of a Chicago bratwurst are reduced to the size of the baby gherkins that
> > garnish them
>
> Descriptions like these are why I love t
From: Charles Dickman: Tuesday, July 28, 2015 9:03 AM
> If the posts and balls are metal, the panel sockets are going to crack
> because there will not be any give in the shaft. If the ball and shaft
> is replaced with a solid pin, the panel sockets will get damaged
> because the socket will have t
On 07/28/2015 12:34 PM, Shaun Halstead wrote:
Unknown power supply module. Has NCR part numbers but google gives no love.
+5 (x2), -5, +12, -12.
Make offer. Photos: http://microfilmks.com/Ebay/UnknownPSU1.jpg and
UnknownPSU2.jpg
Hmm, possibly from a Tower machine. Mine had power input (d
And what a hijack.. sorry. Please just disregard that last post, in the
context of this thread..
We're all much better off exploring the original topic, which is far more
useful and interesting.
On Wed, Jul 29, 2015 at 8:58 PM, drlegendre . wrote:
> I get the jab you're taking at latter-day Aud
I get the jab you're taking at latter-day Audiophool idiocy, but you won't
find any gold-plated OFC business in any of the vintage gear I typically
work with.
But as far as gold plating goes, gold is a good conductor, it solders very
well, it doesn't tarnish and its ductility promotes solid connec
On Wed, Jul 29, 2015 at 4:10 PM, drlegendre . wrote:
> If you're interested, I have somewhere a document from Mallory - I believe
> it may be a hardbound volume, perhaps a catalog - that describes the
> evolution of the multi-section aluminum can electrolytic, from the early
> versions up through
On 07/29/2015 09:44 AM, Shaun Halstead wrote:
I really wish I had a Pertec to SCSI bridge. It would have made these
drives far more useful over
the years.
YEAH! I HAD one, salvaged from a Digi-Data drive. It
actually WORKED on the Keystone one time, then developed a
power-on self test
My understanding is that computer grade capacitors
have higher leakage currents than similar sized non-computer
grade capacitors.
When reforming capacitors watch the current going into
the capacitor. The forming process causes outgassing.
If you excess the amount that the burst seal can handle,
eve
On Wed, Jul 29, 2015 at 3:34 AM, Eric Smith wrote:
> Some people seem to think that "reforming" an aluminum electrolytic
> capacitor is some kind of cheat, akin to zapping NiCd cells or
> rejuvenating CRTs. Actually reforming is the same electrochemical
>
Reforming is standard practice with
On 07/29/2015 03:39 PM, ben wrote:
I would guess ripple current.
You got me there--in particular, I've had terrible luck with Sprague
"Long Life Hermetically Sealed" screw-terminal caps. Just about every
single one I've run into has been bone dry. Useless to try to reform
those. Lambda
I'll be in touch off-list.
Thanks,
m
- Original Message -
From: "supervinx"
To: "General Discussion: On-Topic and Off-Topic
Posts"
Sent: Monday, July 27, 2015 5:28 AM
Subject: R: Re: IBM RT memory boards
I own two 7012 and could be interested in, if you
can shipping overseas :)
On 7/29/2015 4:10 PM, drlegendre . wrote:
Capacitor technology made huge strides in the 1960s and 1970s - and has
continued to advance even to this very day. Parts that were once the size
of a Chicago bratwurst are reduced to the size of the baby gherkins that
garnish them, with better specs acro
> On Jul 29, 2015, at 3:10 PM, drlegendre . wrote:
>
> Parts that were once the size
> of a Chicago bratwurst are reduced to the size of the baby gherkins that
> garnish them
Descriptions like these are why I love this mailing list.
Ian
On Wed, 29 Jul 2015, drlegendre . wrote:
Incidentally, what exactly differentiates a computer-grade cap from any
other alum. electrolytic?
Maybe computer-grade don't need gold-plated oxygen-free leads?
> On 30 Jul 2015, at 7:12 am, Mike Ross wrote:
> Interesting. So Bernie Madoff used an AS/400?
ahh bingo! I found this comment on the Amazon book review:
"The description of the ancient 1988 IBM AS 400 and the terminals from a 1970's
spy film that were still cranking away on the 17th floor whe
Capacitor technology made huge strides in the 1960s and 1970s - and has
continued to advance even to this very day. Parts that were once the size
of a Chicago bratwurst are reduced to the size of the baby gherkins that
garnish them, with better specs across the board. And if you want to count
the "
Seems an odd request, definitely needs more detail, unless you know your
computers they were pretty bland to most observers.
To me there are three enclosure styles: the original monolithic white box, the
later black box with colour accents and the current generic POWER rack style -
none jump ou
*Googles*
"THE WIZARD OF LIES"
Interesting. So Bernie Madoff used an AS/400? I've heard of them
turning up in some other dodgy places - like drug lord mansions in
Central America; apparently they were regarded as secure enough to do
their accounts!
Mike
On Wed, Jul 29, 2015 at 10:11 AM, Oldcomp
On Tue, 28 Jul 2015, Oldcomputers wrote:
I received this email - they want am IBM AS/400 for a film - it doesn't
have to work. They will pay for transportation and rent.
Near Brooklyn NY I think.
And what will they pay for damage or destruction?
Always get more details - as others have said p
> -Original Message-
> From: cctech [mailto:cctech-boun...@classiccmp.org] On Behalf Of IMAP List
> Administration
> Sent: 29 July 2015 17:48
> To: cct...@classiccmp.org
> Subject: Re: need help getting a Sun Ultra-10 working
>
> Hi Dave,
>
> On 07/29/2015 06:40 PM, Dave G4UGM wrote:
> >
Take the keyboard out and see if you then get a response on the TTYa. I have
two sun's with dead NVRAM and can't get either to work with any of the
replacments I have tried. Even tried CR2032 on existing battery after attacking
with Dremel...
Dave
> -Original Message-
> From: cctech [m
Hi Dave,
On 07/29/2015 06:40 PM, Dave G4UGM wrote:
> Take the keyboard out and see if you then get a response on the TTYa.
Yes! I now get to the openboot prompt and can type stuff like "probe-ide" (not
listed in output of "help diag") and I can see my disk and cdrom.
Why does the system hang whe
Yes, the post certainly looks like NVRAM fail. Good luck on the chip.
On Wed, Jul 29, 2015 at 6:23 PM, IMAP List Administration wrote:
> Hello Folks,
>
> I just assembled an Ultra-10 (replaced memory, CPU, NVRAM chip, IDE hard disk,
> IDE CDROM) and it seems to be hanging somewhere. I don't get a
Hi Shaun,
Can you estimate weight on the SHD1Z-ZZ? That's all DEC RZ26 drives in
there? I can't seem to find a picture so I'm not clear on dimensions or
weight ... Someone already claim it?
Thanks,
Sean
On Tue, Jul 28, 2015 at 1:34 PM, Shaun Halstead <
microf...@microfilm.kscoxmail.com> wrote:
Hello Folks,
I just assembled an Ultra-10 (replaced memory, CPU, NVRAM chip, IDE hard disk,
IDE CDROM) and it seems to be hanging somewhere. I don't get anything from the
VGA connection on the 1280x1024 LCD monitor that is connected, but on the serial
console I see the output pasted below.
The sys
I received this email - they want am IBM AS/400 for a film - it doesn't have to
work. They will pay for transportation and rent.
Near Brooklyn NY I think.
Email Bianca below if interested.
==
Begin forwarded message:
> From: Bianca Siu Davies
> It does not have to wo
> From: Johnny Billquist
> DEC made improved cards in many cases, where they added a 0 at the end
> of the improved card.
The other thing one will sometimes find (in PDP-11's at least, not sure about
other machines) is that an M7xyz is replaced by the upgraded M8xyz, e.g.
M7265, M7266
On Wed, Jul 29, 2015 at 11:27 AM, drlegendre . wrote:
> And therein lies the rub. It seems that so many of the 'legacy' caps we
> come across already have some degree of irreversible damage, that the idea
> of reforming them appears to be some type of dark art.
As someone else pointed out earlier
A lot of the early unibus boards which were 3 digit and replaced by a 4
digit were duel height boards that required a M7821 and M105 (not sure
about the numbers), and DEC built those into a quad height board and added
a "0".
On Wed, Jul 29, 2015 at 1:56 PM, william degnan
wrote:
> It could also
It could also be the extra "0" is for some reason intended to be
installed in an expansion chassis for the system. It is a stretch to
make this assumption, the thought occured because I know the power
supply in an expansion chassis I have is called h7420a, whereas the
main unit part number is h742
Here's a beast of a manual that I've scanned and posted. Will send
the original for the cost of shipping (assume at least 5lbs of paper
here, coming from 60070.)
https://dl.dropboxusercontent.com/u/13043699/pics/GECENT.jpg
Scan is here:
http://chiclassiccomp.org/docs/index.php?dir=%2Fcomputing/
From: Jack Rubin: Wednesday, July 29, 2015 10:08 AM
If you were following Joerg Hoppe's recent PC05 auction on eBay, you might
have noticed that his system had an M705 in the backplane where I would have
expected an M7050. This is the way he received it and the restored unit works
as it should.
On 2015-07-29 19:08, Jack Rubin wrote:
If you were following Joerg Hoppe's recent PC05 auction on eBay, you might have
noticed that his system had an M705 in the backplane where I would have
expected an M7050. This is the way he received it and the restored unit works
as it should.
Clearly th
Hi Eric,
Excellent article.
On Wed, Jul 29, 2015 at 2:34 AM, Eric Smith wrote:
> Some people seem to think that "reforming" an aluminum electrolytic
> capacitor is some kind of cheat, akin to zapping NiCd cells or
> rejuvenating CRTs.
>
(...)
>
> The reforming process WILL NOT fix other thin
I have a crufty old version of DesignSpark PCB. I'll have a look at
Mechanical.
It's basically SpaceClaim that's been tweaked to only output it's native
file format and STL files.
You should also do your design work in metric if you expect to be having
parts printed. Scaling isn't a practi
If you were following Joerg Hoppe's recent PC05 auction on eBay, you might have
noticed that his system had an M705 in the backplane where I would have
expected an M7050. This is the way he received it and the restored unit works
as it should.
Clearly the cards are similar but different but are
From: Pete Turnbull: Wednesday, July 29, 2015 7:05 AM
One concern that I had was that the new design might end up trying to
ovalize the (brittle) socket in the mating panel, since the new posts
are only really compressible in one axis.
I doubt that matters much either, because it's the posts th
From: geneb: Wednesday, July 29, 2015 7:16 AM
On Wed, 29 Jul 2015, Vincent Slyngstad wrote:
Are you referring to the junction of the post and the block? That would be
easy enough to do (though tedious in SketchUp).
...which is why SketchUp shouldn't be used for CAD work. If you're using
Win
On 07/28/2015 08:05 PM, Jon Elson wrote:
> Hmm, that's a CDC / Laser Magnetic Storage 92185 drive, right? Looks like it
> probably has the
> buffered Pertec interface, from the two connectors on the back. I've been
> looking for a 92185 with
> the SCSI interface (or just the SCSI interface boa
On Wed, 29 Jul 2015, Vincent Slyngstad wrote:
From: Pete Turnbull: Wednesday, July 29, 2015 2:57 AM
On 29/07/2015 07:24, Vincent Slyngstad wrote:
I've placed a new design at:
http://svn.so-much-stuff.com/svn/trunk/3D/rack-bracket/bracket-new.jpg
That looks pretty good to me, and the only ref
On 29/07/2015 14:11, Vincent Slyngstad wrote:
From: Pete Turnbull: Wednesday, July 29, 2015 2:57 AM
Firstly, to add a small fillet to the junction of post and flat
Are you referring to the junction of the post and the block? That would
be easy enough to do (though tedious in SketchUp).
Ye
From: Pete Turnbull: Wednesday, July 29, 2015 2:57 AM
On 29/07/2015 07:24, Vincent Slyngstad wrote:
I've placed a new design at:
http://svn.so-much-stuff.com/svn/trunk/3D/rack-bracket/bracket-new.jpg
That looks pretty good to me, and the only refinements I'd suggest are
these:
Firstly, to a
Better explanation than mine.
Eric Smith wrote:
>Some people seem to think that "reforming" an aluminum electrolytic
>capacitor is some kind of cheat, akin to zapping NiCd cells or
>rejuvenating CRTs. Actually reforming is the same electrochemical
>process that the manufacturer uses to "form" th
On 29/07/2015 07:24, Vincent Slyngstad wrote:
I've placed a new design at:
http://svn.so-much-stuff.com/svn/trunk/3D/rack-bracket/bracket-new.jpg
I don't know if the design will work -- will the slit will provide
enough flexibility, will the post crack, etc.
That looks pretty good to me, an
> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of quapla
> Sent: 29 July 2015 10:29
> To: General Discussion: On-Topic and Off-Topic Posts
>
> Subject: Re: H960 blank panel clips
>
> On 2015-07-29 08:24, Vincent Slyngstad wrote:
> > From: Pete Turnb
On 2015-07-29 08:24, Vincent Slyngstad wrote:
From: Pete Turnbull: Tuesday, July 28, 2015 10:58 AM
On 28/07/2015 18:22, Vincent Slyngstad wrote:
What do folks think of the idea of thickening the shaft, terminating
it
in a hemisphere, but then cutting half-way down the result with a Y
or X
shap
Some people seem to think that "reforming" an aluminum electrolytic
capacitor is some kind of cheat, akin to zapping NiCd cells or
rejuvenating CRTs. Actually reforming is the same electrochemical
process that the manufacturer uses to "form" the capacitor in the
first place, building up the aluminu
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