Eric Smith wrote:
> What leads people to believe that the original PDP-11/35 power supply
(H742 or H7420) or the PDP-11/44 power supply (H7140) aren't switching
supplies?
Personally, I was assuming that the people who posted before I did knew what they were talking about when they said the power supply was linear instead of switching.
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Look on the bright side - there's no plywood or MDF.
I once picked up an arcade cabinet from a guy without realizing that a mischief of mice had made it their home while it was in long-term storage. As gross as I'm sure that power supply was when you first opened it up....
You may think you can clean years of mouse urine out of MDF.... and I'm willing to grant the possibility that it may actually be theoretically possible. but I eventually had to give up and put the cabinet at the curb.
------------------------------
Message: 28
Date: Mon, 14 May 2012 00:01:34 -0700
From: Seth Morabito<lists at loomcom.com>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Subject: PDP-11/35 power supply woes
Message-ID:<9B95838A-9A34-4296-A18D-5107E43D9A99 at loomcom.com>
Content-Type: text/plain; charset=us-ascii
Ugh. It was a fairly disappointing day on the PDP-11/35 restoration front. I've updated my restoration journal (http://www.loomcom.com/projects/pdp11-35/index.html ), but in summary, my H750 power supply is one big gross mess.
Take a look at the condition it was in:
http://www.loomcom.com/projects/pdp11-35/bc05t_rust.jpghttp://www.loomcom.com/projects/pdp11-35/h750_out.jpghttp://www.loomcom.com/projects/pdp11-35/h744_messy.jpghttp://www.loomcom.com/projects/pdp11-35/h744_corrosion.jpghttp://www.loomcom.com/projects/pdp11-35/xformer_mice.jpghttp://www.loomcom.com/projects/pdp11-35/rusted_parts.jpg
All that pink stuff is fiberglass insulation. Mice got into the power supply, and made it a nest and toilet. Everything is soiled, and lots of exposed metal is corroded.
I'm feeling kind of low about this. I do believe this is restorable, but the amount of time it's going to take is bumming me out. I'll have to disassemble everything, right down to the last screw, and clean anything that's cleanable, strip rust off of anything strippable, and test all the parts individually. The fan will probably need to be replaced.
Plus, it's just yucky, y'know?
At least I've cleaned out the mouse nests. That's a start, I guess.
-Seth
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>From: Dave McGuire <mcguire at neurotica.com>
>Subject: Re: passing of Chuck Moore
>
?>?Ugh. ?I'm sorry to hear it Paul. :-(
>
>?? ? ? ? ? ? -Dave
>
>--
>Dave McGuire, AK4HZ
>New Kensington, PA
>
>
>On May 12, 2012, at 2:39 PM, Paul Anderson <useddec at gmail.com> wrote:
>> Sorry for your loss. Most of my health problems are more quality of
>> life rather than life threatening. But I do have someone very dear to
>> me that has been on a paticulal clinical trial longer than anyone in
>> the US. They think she might have reached the point of toxicity and
>> might give her one more treatment. We are running out of options. You
>> just never know.
>>
>> Take Care, Paul
>>
>> On Fri, May 11, 2012 at 12:11 PM, Dave McGuire <mcguire at neurotica.com> wrote:
>>> On 05/11/2012 11:35 AM, Adrian Stoness wrote:
>>>> sometimes people have no idea they have it feel sick go see a doc and days
>>>> later their dead lost a few family friends this way and nieghbors :'(
>>>
>>> ?Ironically, I lost a relative two days ago due to exactly this
>>> problem. ?She was undergoing physical therapy due to a broken hip, and
>>> had a lot of pain...they thought it was just from the hip, so no tests
>>> were done. ?It wasn't just from the hip. ?Less than a week later she was
>>> gone.
>>>
>>> ? ? ? ? ? ? -Dave
>>>
>>> --
>>> Dave McGuire, AK4HZ
>>> New Kensington, PA
>
Sometimes comics can provide some real insight:
http://xkcd.com/931/
Th e fiance' of Randall Munroe, the creator of XKCD, developed breast cancer and they have been going through treatment together.
At 12:00 -0500 5/13/12, David wrote:
>I recently acquired a PowerMac 9600/233 with a bunch of DigiDesign
>DSP Farm cards in it. I have no intention of using this machine
>for Pro Tools, but I can think of a few fun things to do with some
>PCI cards full of DSP56k chips.
Oh my!
http://www.distributed.net/Main_Page
As far as I know, there is no DSP56k client, but there are CUDA and
STREAM clients so in principle it should be possible. I hope to one
day have time and expertise to update the NeXT client to use the NeXT
DSP56k, just because it's about the last practical compute effort my
NeXT can contribute to and the DSP56k would probably about double its
keyrate. Your PowerMac would be way more powerful.
--
- Mark 210-379-4635
-----------------------------------------------------------------------
Large Asteroids headed toward planets
inhabited by beings that don't have
technology adequate to stop them:
Think of it as Evolution in Fast-Forward.
All,
disposing of 3 dead Apple AC adaptors. Would love to fix
them, but have higher priority repairs to make and have already
ordered replacements (FastMac TruePower 65W for Powerbook G3, per a
recommendation on LowEndMac; will post results if anyone is curious).
I suspect these are e-waste, but in case anyone with more
time or sense of history than me needs them, thought I'd make them
available here first. Shipping from Texas, USA, area code 78254; I'll
include the (IEC C13?) cord that goes from the wart to the wall only
if you request it, since I can use those and you may want to save on
shipping.
1) Powerbook Duo AC adaptor, model AA19200, Apple family number
M2693. Output 24V, 1.5A, plug fits our Powerbook 3400's and
presumably other powerbooks as well. Our 3400's now refuse to run or
charge from it.
2) Macintosh Powerbook 45W Power Adaptor, Model Number 3037. Output
24V, 1.87 A. This one looks a lot like the power adaptors that came
with the 3400's, but the connector on its cable is a much narrower
barrel with no central pin. It is possible this one works.
2a) "VST Charger 500 for Apple Powerbook 5300 & 190 Series batteries;
Requires Apple or VST AC or AC/DC adaptor. DC in 24V 2.0 A."
Connector matches 2) above (the narrow barrel) so it would be a good
idea to take these together; accepts two battery packs for PB
190/5300/3400 on top. This one emitted magic smoke simultaneous with
ceasing to work, so it will definitely need parts replaced.
3) "Macintosh Powerbook 45W AC Adapter" Output 24V, 1.88A. This one
has the larger connector that fits the 3400s. I tried to open it, so
the label is a bit torn up. Our 3400's refuse to run or charge from
this one.
Please send email to me (best) or the list, or contact me at
cellphone number below. I'll wait until May 20 or so before tossing
these.
--
- Mark 210-379-4635
-----------------------------------------------------------------------
Large Asteroids headed toward planets
inhabited by beings that don't have
technology adequate to stop them:
Think of it as Evolution in Fast-Forward.
