Well now you've done it! I actually am confused.
What do you mean by "must be derated"?
Can I use a big step up Xformer to run a monitor and computer without
risking to blow both up?
If so in what conditions?
Thanks
-----Original Message-----
From: Philip.Belben(a)powertech.co.uk <Philip.Belben(a)powertech.co.uk>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Friday, January 16, 1998 10:44 AM
Subject: Re[4]: Amstrads in the US
>> OK I'll get an EE to help me out. Did you ever used that with a monitor?
is
>> the 60 Hz vs 50 Hz a problem?
>>
>>>When I went to the US recently, I built my own 110/220V converter. I
>>>found a small (10VA) transformer that had dual 120V primaries and wired
>>>these as an autotransformer. Boxed it up in small wooden box and Bob's
>>>your uncle.
>
>As Tony pointed out, 50/60 Hz shouldn't be a problem.
>
>HOWEVER, it should be pointed out that the transformer must be capable
>of carrying the power. I used a 10VA transformer to power the one or
>two devices that had 240V only. To run monitors and things, you'd need
>100VA or so. Transformers do exist for just this sort of purpose, upto
>about 2kVA, but V. heavy!
>
>(Rule of thumb for switchmode power supplies - Look at ower consumption
>and assume 1VA = 0.6W)
>
>Finally, a tranformer designed for 60Hz must be derated to a lower
>VOLTAGE when used at 50Hz.
>
>I hope that hasn't got you all too confused.
>
>Philip.
-----------------------------------------------------------------------
Francois Auradon.
Visit the SANCTUARY at http://home.att.net/~francois.auradon
On 16 Jan 98 at 22:50, Richard A. Cini wrote:
> I got an Apple ][gs today form a guy in Georgia. It's a ROM 03 model
> with 1mb of RAM, an RGB monitor and an Apple keyboard. It has no docs,
> floppy drives, or mouse.
>
> Does anyone have a spare mouse, floppy drive, and maybe docs that I can
> buy? Which drives were available for this unit? I have mostly 5-1/4" disks
> right now, so I'd like to get that type first, then maybe a 3-1/2".
The ADB mouse is the same as the ones used on all Macs since the SE
and Mac II so you should have no problems finding one.
A stock IIGS will work with 3.5" 800K drives or 5.25" 140K drives
(the Unidisk 5.25). You can use older Disk II drives using a cable
adapter but it may not be worth the effort. Not all external 3.5"
drives from Apple work with the IIGS and are Mac only; the one to
look for has an eject button, platinum ribbed case and a covered D19
socket for daisy-chaining a second floppy drive.
For more information, consult the FAQs which are posted on the
comp.sys.apple2 newsgroup (beware of flame wars!) or on the web at
http://www.visi.com/~nathan/a2/index.html.
> I have a copy of ProDOS floating around but I'd like to get a
copy of > GS/OS. Can I run this with 1mb of RAM?
Version 6.0.1 of GS/OS is posted on Apple's FTP site. This version
will not do anything useful in 1Mb so look around for a memory
expansion card. A couple of companies now supply bare boards that
will take cheap 30 pin 1Mb SIMMs.
Happy Apple II Computing,
Phil
**************************************************************
Phil Beesley -- Computer Officer -- Distributed Systems Suppport
University of Leicester
Tel (0)116 252-2231
E-Mail pb14(a)le.ac.uk
Nope I have no idea of the type of drives that are installed in there.
If you salvage it I would be interested in some parts (one of the keyboard
latches on mine is broken and I would like to replace it)
Let me know.
Thanks.
-----Original Message-----
From: Joe <rigdonj(a)intellistar.net>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Friday, January 16, 1998 11:08 PM
Subject: Re: Anybody want an Osborne?
>Francois,
>
> Well I got the Osborne. It turns out that the dealer had to move and had
>to get rid of a bunch of stuff so he was a lot more reasonable on his
>prices. I haven't had time to do anything with it yet. I probably won't
>for a few days. BTW Do you know what kind on drives are in there? They
>look like they might be some of the old Shugart SA 400s. If so I can
>probably use them to restore my old Altair. It has a disk controller for
>the SA 400s but the drives are long gone.
>
> Joe
>
-----Original Message-----
From: Uncle Roger <sinasohn(a)ricochet.net>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Friday, January 16, 1998 9:49 PM
Subject: Re: What I did this weekend
>At 01:17 PM 1/15/98, you wrote:
>>
>>
>>At 11:48 AM 1/15/98 -0600, you wrote:
>>>Tat goes without saying: placing a machine in a want list is also an
>>>engagement to purchase it. Otherwise the system would not work for too
long.
>
>Things "that go without saying" are usually what screw up the system.
>Things like that are best said up front. Better to have someone say "well,
>duh" then to have someone get stiffed.
>
I meant that it goes without saying in the scope of this discussion.
Otherwise yes we would need well planned rules.
-----------------------------------------------------------------------
Francois Auradon.
Visit the SANCTUARY at http://home.att.net/~francois.auradon
I saw this label on an IBM monitor in a thrift shop the other day and I
thought some of you guys might get a kick out of it. It read:
USE OF THIS DEVICE IS RESTRICTED TO IBM
MANAGEMENT APPROVED PURPOSES ONLY
and they even had a policy number for this mandate: Z229-0444-00
Beauracracy at it's finest.
Sam Alternate e-mail: dastar(a)siconic.com
-------------------------------------------------------------------------------
Computer Historian, Programmer, Musician, Philosopher, Athlete, Writer, Jackass
Coming Soon...Vintage Computer Festival 2.0
See http://www.siconic.com/vcf for details!
Hi,
I picked more stuff today and found some DEC hard drives in the pile.
Can anyone tell me what size they are and what machines they're for? I
*think* they may be out of a Vax, but that's a guess.
They're all full height 5 1/4" drives and they weigh a ton. The first one
is marked "digital RZ55" and has a sticker that says "1041080-08-9" and it
appears to have a SCSI interface. The second one appears to have a ST-506
interface and is a Maxtor drive and is marked "RD54-A" and "30-26245-01"
and "RQDX 3".
I also picked up a couple of keyboards that I think might be for a DEC.
The first one is a large keyboard marked "TS 803". It has 16 Pf keys along
the top and a separate numeric keypad. It's gray on top and white on the
bottom. The second keyboard is from digital and is a model LK 201. Doe
anyone know which machine it's for?
Joe
If you can get just the video loopback connector I'll be interested, one of
mine is missing it and I would like to replace it with an original.
thanks for the post.
> I found a non-working Osborne computer at a scrap dealers. I tried to
>test it but no lights came on or drives moved so I suspect a power supply
>problem. It's probably fixable without too much trouble. There is a
>similar one for sale on Auction Web. You can see pictures of it there
>"http://iguana.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=4212123". The
>dealer wants $20 plus shipping. Anyone interested in it?
>
> Joe
-----------------------------------------------------------------------
Francois Auradon.
Visit the SANCTUARY at http://home.att.net/~francois.auradon
Yes it is a PC compatible -- it's an XT. I suppose the DD referred to
Double Disk, but I pulled the second floppy to install the hard drive.
It's a peculiar, many-screwed, (phenolic?) plastic case.
manney(a)nwohio.com
At 01:59 AM 1/14/98 +0000, you wrote:
>And, hey, all portable *ARE* bulky anyway even my Luddite is very
Not all portables are bulky -- m100, portfolio, Geneva, Starlet, etc. all
come to mind.
>thick and heavy. Even the T1000 early one is clusmy too.
But nowhere like the 5100.
>My opinion is that IBM 5100 is the winner for most heaviest and
>unprotected portable. Even modern smallest desktops with built-in
I dunno about most unprotected, but I used to have a Centronics 101 portable
printer that was tough for even *me* to lift! And the Sony 17" portable
display unit my atari club has could probably give the 5100 a run for its
money weightwise.
>I wouldn't have any handles on anyway. Reasonably good idea this way
>so users are forced to hold it carefully and stuff their portables
>into padded bags/cases. Handles invites accidents and some swing
>around too easily, bang into other objects that could crack/break
>screens and hard drives like that, handles breaks, *CRASH!*
Or you could make it well enough that that wouldn't matter... 8^)
Besides, you put a handle on an IBM 5100, turn around quick, and you could
*kill* someone! 8^)
--------------------------------------------------------------------- O-
Uncle Roger "There is pleasure pure in being mad
roger(a)sinasohn.com that none but madmen know."
Roger Louis Sinasohn & Associates
San Francisco, California http://www.crl.com/~sinasohn/
OK I'll get an EE to help me out. Did you ever used that with a monitor? is
the 60 Hz vs 50 Hz a problem?
>When I went to the US recently, I built my own 110/220V converter. I
>found a small (10VA) transformer that had dual 120V primaries and wired
>these as an autotransformer. Boxed it up in small wooden box and Bob's
>your uncle.
>
>PS If you can't work out how to do it from the above, don't try it
>yourself, get someone with some more electrical knowledge :-)
>
>Philip.
