Stephen Dauphin <ai705(a)osfn.org> wrote:
> Is this related to what I am about to ask? Could somebody do a short
> summary of why Fimi(?) greyscale megapixel NeXT monitors fade after
> 20,000 or so hours of use and indicate whether there are any other
> monitors (perhaps some classic) that show similar problems?
Because St*v* J*bs is really in the collectibles business and applies
principles of planned obsolescence to make sure his computers become
more valuable over time?
Don't CRT filaments degrade with use? I've seen this on other
workstation monitors from Sun and HP, typically ones that were used as
consoles and left on 24x7. Unfortunately, for all the design that
went into the NeXT, they seem to have omitted the power switch on the
monitor.
Also I vaguely remember, back in the days when a TV set was a
big-ticket item, the local TV repairman had cylindrical devices called
"boosters" that could be inserted in the circuit between the plug on
the back of the CRT and the set's CRT socket to extend the life of a
dim picture tube. I don't really know what it did, but I suppose it
was something like a step-up transformer for the CRT filament voltage.
-Frank McConnell
> Guess what? You don't. The Sinclairs *only* accepted keywords with the
> key combinations! The appropriate keywords should be printed on the
keyboard.
> Not until the Spectrum +3 were you finally able to enter keywords in
longhand.
>
O.K. How do I enter programs, then, such as
10 CLS
20 PRINT "HELLO";
30 GOTO 20
if I can't enter things such as the "hello"?
>
> 1K computer, video entirely via TTL logic, Z80A at 3.5MHz. RAM expansion
> available; 80x50 (I think) character graphics in B&W. Identical to the
> British Sinclair ZX80 and ZX81, and scads of info are there for the
taking
> on the Web.
>
ThAnX,
-Jason
***********************************************
* Jason Willgruber *
* (roblwill(a)usaor.net) *
* *
* http://members.tripod.com/general_1 *
* ICQ#-1730318 *
* /0\/0\ *
* > Long Live the 5170! *
* \___/ *
************************************************
We're talking about different things. YOu're saying that a personal
computer is any computer to which the adjective personal may be
applied. I mean a phrase used by various manufacturers after the mid
70's
>Personal computer: Any computer owned by a single individual rather
than a
>corporation or government entity. Alternately any computer with a low
enough
>aquisition and operation cost to BE owned by an individual. This fits
this
>group best, since especially the mini and mainframe collectors
>have such animals as their "personal computers".
>
>The semantics become simple.
>"What is this cray 1 you have in the basement?"
>"It's my personal computer."
>
>The fact that they're also supers, mainframes, minis, or micros becomes
>irrelivant.
>
>:)
>
>
>--
>Jim Strickland
>jim(a)DIESPAMMERSCUMcalico.litterbox.com
>-----------------------------------------------------------------------
>Vote Meadocrat! Bill and Opus in 2000 - Who ELSE is there?
>-----------------------------------------------------------------------
>
>
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Subject: Re: CRT decay
Author: classiccmp(a)u.washington.edu at internet
Date: 11/2/98 3:19 PM
On Mon, 2 Nov 1998, William Donzelli wrote:
> > Yes, "getter" is the word.
>
> Spefically, the getter is the wierd looking bit of metal that is near the
> silverly coating on the tube, whose job is to get the residual and trapped
> gas during manufacture. The keeper is the actual silvery coating, whose
> job is to keep the oxygen in a state so it can not get rereleased.
>
>>Is this related to what I am about to ask? Could somebody do a short
>>summary of why Fimi(?) greyscale megapixel NeXT monitors fade after
>>20,000 or so hours of use and indicate whether there are any other
>>monitors (perhaps some classic) that show similar problems?
Neither the getter nor the phosphor should have anything at all to do
with fading. The culprit is probably a weak cathode on the electron
gun. The cathode isn't boiling off enough electrons to 'paint' the
phosphor to the intensity needed. There used to be boosters available
for older tv sets to goose additional life out of weak crt's. I've
never heard of it in this case. Also, you can have old crt's rebuilt
with new electron guns but this is VERY expensive. I would search for
a replacement tube first.
Marty
-- Stephen Dauphin
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From: Stephen Dauphin <ai705(a)osfn.org>
To: "Discussion re-collecting of classic computers"
<classiccmp(a)u.washington.edu>
Subject: Re: CRT decay
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> On Mon, 2 Nov 1998, Hans Franke wrote:
>> Hey, I have a way better idea - since I know, you want to
>> get rid of your Poly88, I might offer you free staying for
>> lets say a week or so in Munich - This will be in a thousends
>> of stars class of housing wihe free pool, fresch air,
>> convieniant to the Deutsches Museum and my home, right
>> in the middle of the city. Great people, great hospitality,
>> and I might even supply a plasic sheet, so you don't get wet ....
> Can I get the same deal with a Commodore 64?
As long, as they are not blown up by terrorists,
our bridges are free for everyone. But for a C64
I think you have to add some money :)
Servus
Hans
--
Ich denke, also bin ich, also gut
HRK
______________________________ Reply Separator _________________________________
Subject: Re: Ancient machines turning on (was Re: eBay strikes again
Author: classiccmp(a)u.washington.edu at internet
Date: 11/2/98 2:28 PM
On Mon, 2 Nov 1998, Hans Franke wrote:
> Hey, I have a way better idea - since I know, you want to
> get rid of your Poly88, I might offer you free staying for
> lets say a week or so in Munich - This will be in a thousends
> of stars class of housing wihe free pool, fresch air,
> convieniant to the Deutsches Museum and my home, right
> in the middle of the city. Great people, great hospitality,
> and I might even supply a plasic sheet, so you don't get wet ....
>>Can I get the same deal with a Commodore 64?
Make that two of us Sam. I'll even through in the data cassette.
Marty
Sellam Alternate e-mail: dastar(a)siconic.com
------------------------------------------------------------------------------
Always being hassled by the man.
Coming in 1999: Vintage Computer Festival 3.0
See http://www.vintage.org/vcf for details!
[Last web site update: 11/02/98]
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From: Sam Ismail <dastar(a)ncal.verio.com>
To: "Discussion re-collecting of classic computers"
<classiccmp(a)u.washington.edu>
Subject: Re: Ancient machines turning on (was Re: eBay strikes again
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It's too bad most micros don't have a debugger in ROM. Except for
computers made by Apple, I don't know of any. I especially wish the
PC had a ROM debugger. It would really help me feel like I'm using a
worthwhile machine.
>> (and isn't this obvious) acceptable at the keyboard are relative to
the
>> operating system. So, which OS is it that is running on your
machine?
>
>The 11/44 has a rather nice monitor built in to the CPU system. It runs
>on an 8085 processor, and it lets you type commands on an standard
ascii
>terminal to edit the PDP11's memory, start/halt programs, etc. Even
look
>at the CPU microprogram counter.
>
>It's a replacement for the old lights-and-switches panel. The commands
>are totally independant of any OS you might be running - in fact you
can
>use the 'frontpanel' commands on a machine with no mass storage at all.
>
>-tony
>
>
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>>> It's not that weird. Everyone knows that 286 and 386 machines are
>>> crap ;) In fact, one reason is that noone gets attached to them, and
>> Just tell these to some of the Yougoslavian dealer
>> on swap meets and fleamarkets over here they are
>> mostly ignorant and see PC as PC - no mater whats
>> inside. 86 laptop with broken case just 200 Mark
>> (as seen last weekend :) WooHaHa.
> I was really wondering how to pay for my next trip to Europe, and this sound
> better than ebay! Now, how many can I take in my luggage. I can probably
> fit about 15 or so, since these are in better shape, maybe I can get 300
> marks. Let see, 300 * 15 = 4500 marks which is about (I think) $3000 USD?
> That will just about cover it :).
Just be aware to display them for some weeks before they get
sold (and lets equate some with 50+).
Hey, I have a way better idea - since I know, you want to
get rid of your Poly88, I might offer you free staying for
lets say a week or so in Munich - This will be in a thousends
of stars class of housing wihe free pool, fresch air,
convieniant to the Deutsches Museum and my home, right
in the middle of the city. Great people, great hospitality,
and I might even supply a plasic sheet, so you don't get wet ....
And you could still try to sell your 15 laptops :)
*g*
Gruss
Hans
Sorry Marvin,
I just could not resist - You just don't know these
trolls we have on every swap/flea market. Serious,
you're wellcome, when ever you are in Munich.
--
Ich denke, also bin ich, also gut
HRK
Servus Derek,
> (I may bring my Kaypro to show to
> people, or perhaps just software -- there were other Kaypro demos there.
> )
I may need your help in the near future. I just aquired a Kaypro 4
this weekend (just ~25 USD) - its in a bad visual state, but it
seems to work (I cleand it, and it is powering up), but there where
no system or application disks. So geting the system disks would
be helpfull. Do you have some, ode do you know someone who does ?
Thank you
Gruss
Hans
--
Ich denke, also bin ich, also gut
HRK
