On Jan 13, 17:03, ajp166 wrote:
> From: Pete Turnbull <pete(a)dunnington.u-net.com>
> >On Jan 12, 20:14, jpero(a)sympatico.ca wrote:
> >
> >> Sounds like PSU is reacting to overloading or medium shorts
> >> downstream of that PSU outputs. Also can happen with dried
> >> up capacitors (too high ESR).
> >
> >I don't think it's any of those. The regulators all make a similar
> noise
> >when I put them on a dummy load drawing 5A, on the bench. And I'm sure
> >it's not bad caps, as two of them are ones I repaired recently.
>
> This is normal for them as well as the older H780. They are very loud
> and the pitch varies with load as well. That is a side effect of older
> low voltage, low frequency switch mode PS designs of some 20+ years ago.
I suppose so, I just didn't think it ought to be so irritating!
--
Pete Peter Turnbull
Network Manager
University of York
In a message dated 1/13/2002 3:07:42 PM Eastern Standard Time,
fernande(a)internet1.net writes:
> The Local GoodWill has a fairly nice Mac IIci. I've done some research
> on the Low End Mac web site, but am still undecided if I should buy it.
>
i'd say get it if you dont have one. ci model is much better than si and
unlike the cx, has builtin video. I have one complete with video capture card
and came with and still setup for videoconferencing.
> I think I have cracked the issue of converting scanned images into PDF
> using only freeware!
>
> First off get the imagemagick toolset from www.imagemagick.org
> You will also need c42pdf available at http://c42pdf.ffii.org/
>
> c42pdf will create pdf files from group 4 encoded tiff images (only). To
> get to those images use imagemagick convert :
>
> convert -compress group4 <any image file> image.tif
> c42pdf image.tif
>
> will create image.pdf. Read the docs to see how to build multi page PDFs.
>
I convert tiff to g4 tiff with the following
tiffcp -L -c g4 -r 10000 infile1 [infile2...] outfile
This tool takes much less memory to convert. This is
>from libtiff-3.5.5-2. http://www.libtiff.org/ (part of the tifftools)
I have a version that I fixed some problems in c42pdf at
ftp://ftp.pdp8.net/software/c42pdf/
If somebody wants a windows binary I can try building a command line one
with cygwin, email me.
Command line I use
c42pdf -q -o outfile -p o --nostretch --noflip infile.tif
It also has a --pages flag to only convert some pages. This is done on
the fly to convert the tiff's on my site to pdf.
This doesn't create optimized PDF's so acrobat can't fetch them a page
at the time (for good or bad, frequently that delay on each page annoys me)
http://www.pdp8.net/pdp8cgi/query_docs/query.pl
David Gesswein
http://www.pdp8.net/ -- Run an old computer with blinkenlights.
I've recently come across a Sord IS-11 (I think that was the model
number....) with a 64k ram expander, the microcassette drive, and
a full set of Eproms. It has all the manuals, but no power supply.
Since I haven't heard of one before, and haven't seen on listed on
ebay, anyone hear interested? Let me know or it goes in the
recycling pile, since I've completely run out of collecting room.
Thanks.
Paul Braun WD9GCO
Cygnus Productions
nerdware_nospam(a)laidbak.com
"A computer without a Microsoft operating system is like a dog without a bunch of bricks tied to its head."
Hi ...
I'm new to this list and I'm not sure if you trade/buy/sell here but I'm
looking for some TMS 4060 RAM or Equivalent.
Anyone have any or know where I can get some?
I need it to repair some 8080 based computers.
Thanks in advance ....
Dave Langley
www.robotron-2084.co.uk
>STC = Stantec = Standard Telephone and Cable. They sold a truly strange
>computer called the ZEBRA. It was designed to be cheap (it used a drum
>for storage and did arithmetic serially).
I used to have two of them... if you are talking about the same Zebra
systems I had. I don't know much about them. One of my first duties at
this company was to replace them with PCs.
They were used to run the "PICK" OS, and in that run an interviewing
system called "Oscar". As far as the use I saw them doing, they really
were nothing more than a terminal server. They were replaced within weeks
with 386 PCs with DigiBoards, and an intel build of PICK and Oscar.
IIRC, the Zebra's were based around a Motorola 68000 processor (I think
at 16mhz, not sure... this is totally off memory).
I do have 2 fairly large manuals for them still (3" binders with an
assortment of smaller manuals or "chapters" clipped in them). I might
also have a tape backup drive for it, but I think they had tape drives
built in, so the external drive I am thinking of may go to my AT&T unix
machines. I think I also still have the modem that was used on the Zebras
(although, I would guess it is probably nothing more than an fairly
standard 300 or 1200 baud modem).
-chris
<http://www.mythtech.net>
I have three Megapel video boards for the IBM RT, free for cost of
shipping. Preference given to people in the US as it is so much less
hassle. I believe them to work but I have no way to test 'em.
Contact me offlist if you want one!
GZ
I think I have cracked the issue of converting scanned images into PDF
using only freeware!
First off get the imagemagick toolset from www.imagemagick.org
You will also need c42pdf available at http://c42pdf.ffii.org/
c42pdf will create pdf files from group 4 encoded tiff images (only). To
get to those images use imagemagick convert :
convert -compress group4 <any image file> image.tif
c42pdf image.tif
will create image.pdf. Read the docs to see how to build multi page PDFs.
This has worked for a bunch of files for me so far.
-- hbp
From: Pete Turnbull <pete(a)dunnington.u-net.com>
>On Jan 12, 20:14, jpero(a)sympatico.ca wrote:
>
>> Sounds like PSU is reacting to overloading or medium shorts
>> downstream of that PSU outputs. Also can happen with dried
>> up capacitors (too high ESR).
>
>I don't think it's any of those. The regulators all make a similar
noise
>when I put them on a dummy load drawing 5A, on the bench. And I'm sure
>it's not bad caps, as two of them are ones I repaired recently.
This is normal for them as well as the older H780. They are very loud
and
the pitch varies with load as well. That is a side effect of older low
voltage,
low frequency switch mode PS designs of some 20+ years ago.
Allison
> Pat Finnegan wrote:
>> I would say about a 386DX, and it'll do about 6MIPS max (one instruction
>> per four clock cycles on the 68030 IIRC from my Mac IIsi). (If desired)
>> you can put an older verions of MkLinux or linux-m68k on it (I used the
>> m68k Debian port).
>
> How about BSD? I'll probably use the Mac OS, but I wonder about other
> options.
I remember using BSD on my IIcx. Forget which one though.
--
tim lindner tlindner(a)ix.netcom.com
"Life. Don't talk to me about life." - Marvin, the android
