28 Jan
2006
28 Jan
'06
5:41 p.m.
I wont say exactly for what, but I have in my
possession about a dozen brand new crts for a popular
old puter. It was a lucky and unusual find. Not for
sale at this time. Sorry. Having said that, I would
like to acquire some 9-13 inch new color crts for *far
distant* future projects. They need to be high-res
computer grade capable of displaying 3-475 lines of
res (is that even a function of the tube?). Grassyazz
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29 Jan
29 Jan
7:29 a.m.
In article <20060129014113.72068.qmail at web61023.mail.yahoo.com>,
Chris M <chrism3667 at yahoo.com> writes:
I wont say exactly for what, but I have in my
possession about a dozen brand new crts for a popular
old puter.
Is this related to the subject? Did you ask for them and get a
surprise "Hey, I got a bunch of those in my store room!" response?
[...] I would
like to acquire some 9-13 inch new color crts for *far
distant* future projects. They need to be high-res
computer grade capable of displaying 3-475 lines of
res (is that even a function of the tube?).
Presumably you mean 375-475? I can't imagine displaying 3 lines on a
CRT ;-).
I think for this resolution, even a television tube would suffice.
--
"The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ:
<http://www.xmission.com/~legalize/book/>
Pilgrimage: Utah's annual demoparty
<http://pilgrimage.scene.org>
8:28 a.m.
On Sun, 29 Jan 2006 08:29:11 -0700
Richard <legalize at xmission.com> wrote:
In article <20060129014113.72068.qmail at web61023.mail.yahoo.com>,
Chris M <chrism3667 at yahoo.com> writes:
The real leap in technology is getting beyond one line to
anything more than that. Anybody who has spent time fixing old
TV sets can tell you that.
[...] I would
like to acquire some 9-13 inch new color crts for *far
distant* future projects. They need to be high-res
computer grade capable of displaying 3-475 lines of
res (is that even a function of the tube?).
Presumably you mean 375-475? I can't imagine displaying 3 lines on a
CRT ;-).
1:50 p.m.
On Sun, 29 Jan 2006, Richard wrote:
Presumably you mean 375-475? I can't imagine
displaying 3 lines on a
CRT ;-).
Back when Comdex was still active, there were a lot of technologies used
for billboard sized screens. One of the techniques that I saw was a
billboard made of thousands of 2" CRTs, using each 2" CRT as a single
pixel. Each CRT only displayed 3 "lines", RED, BLUE, and GREEN.
2:29 p.m.
In article <20060129134635.E24579 at shell.lmi.net>,
Fred Cisin <cisin at xenosoft.com> writes:
On Sun, 29 Jan 2006, Richard wrote:
Wow. I'd love to have seen a picture of that puppy! I wonder how
much power it drew when turned on :-)
--
"The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ:
<http://www.xmission.com/~legalize/book/>
Pilgrimage: Utah's annual demoparty
<http://pilgrimage.scene.org>
Presumably you mean 375-475? I can't imagine
displaying 3 lines on a
CRT ;-).
Back when Comdex was still active, there were a lot of technologies used
for billboard sized screens. One of the techniques that I saw was a
billboard made of thousands of 2" CRTs, using each 2" CRT as a single
pixel. Each CRT only displayed 3 "lines", RED, BLUE, and GREEN.
2:55 p.m.
Back when
Comdex was still active, there were a lot of technologies used
for billboard sized screens. One of the techniques that I saw was a
billboard made of thousands of 2" CRTs, using each 2" CRT as a single
pixel. Each CRT only displayed 3 "lines", RED, BLUE, and GREEN.
Wow. I'd love to have seen a picture of that
puppy! I wonder how
much power it drew when turned on :-)
Good question.
A lot of the billboard sized screens had trailered generators. I never
knew which were due to amount of power consumption, v which were just a
lack of convenient outlet.
I would have liked to see the multiple CRT one redone with
software/firmware to present a portion of the image on each screen.
(I want a multi-Giga-pixel display!)
There was a nice "portable" screen made of red and green LEDs.
Now that blue has come down to a reacheable price, that could be
done as a really nice one.
3:14 p.m.
In article <20060129145033.W24579 at shell.lmi.net>,
Fred Cisin <cisin at xenosoft.com> writes:
I would have liked to see the multiple CRT one redone
with
software/firmware to present a portion of the image on each screen.
(I want a multi-Giga-pixel display!)
I wonder how much a 2" CRT costs in bulk.... of course after the
glass, you have to have a frame buffer and video driver for each of
them. Even if the CRTs are VGA compatible, that's a lot of VGA
adapters. You'd probably want to build a custom card cage and reuse
discarded ISA/PCI VGA adapters and drive the whole thing with custom
circuitry.
--
"The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ:
<http://www.xmission.com/~legalize/book/>
Pilgrimage: Utah's annual demoparty
<http://pilgrimage.scene.org>
6:04 p.m.
On Sunday 29 January 2006 18:14, Richard wrote:
In article <20060129145033.W24579 at
shell.lmi.net>,
Fred Cisin <cisin at xenosoft.com> writes:
Why? it's not going to take much effort to drive the displays - they don't
have a bunch of pixels, just 3 stripes on them (at least the one I've seen).
You could probably pack enough electronics in half a dozen transistors, to
control the beam in the CRT (excluding the HV source). Usually, the whole
thing acts like one monitor - one input signal to the whole device, whether
it's NTSC composite video (unlikely) or RGB at some fixed (NTSC maybe)
frequency.
It wouldn't be a whole lot more complicated than an average TV or multi-sync
monitor, other than having a larger power draw, and HV supply. :)
Pat
--
Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/
The Computer Refuge --- http://computer-refuge.org
I would have liked to see the multiple CRT one
redone with
software/firmware to present a portion of the image on each screen.
(I want a multi-Giga-pixel display!)
I wonder how much a 2" CRT costs in bulk.... of course after the
glass, you have to have a frame buffer and video driver for each of
them.
6:44 p.m.
In article <200601292104.27414.pat at computer-refuge.org>,
Patrick Finnegan <pat at computer-refuge.org> writes:
On Sunday 29 January 2006 18:14, Richard wrote:
You mean the phosphors are just three stripes of the primaries as
opposed to pixel grids? I was thinking they were like 2" TV tubes or
something.
--
"The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ:
<http://www.xmission.com/~legalize/book/>
Pilgrimage: Utah's annual demoparty
<http://pilgrimage.scene.org>
In article <20060129145033.W24579 at
shell.lmi.net>,
I wonder how much a 2" CRT costs in bulk.... of course after the
glass, you have to have a frame buffer and video driver for each of
them.
Why? it's not going to take much effort to drive the displays - they don't
have a bunch of pixels, just 3 stripes on them (at least the one I've seen).
30 Jan
30 Jan
11:27 a.m.
> Why? it's not going to take much effort to
drive the displays - they don't
> have a bunch of pixels, just 3 stripes on them (at least the one I've seen).
On Sun, 29 Jan 2006, Richard wrote:
You mean the phosphors are just three stripes of the
primaries as
opposed to pixel grids? I was thinking they were like 2" TV tubes or
something.
They were 2" "TV" tubes.
He's saying that because they were only being used to dispaly three
stripes of color, that the circuitry to drive them could be simplified
significantly.
But I want to have a megapixel display on each one, in order to make a
multi-giga-pixel overall display.
29 Jan
29 Jan
7:48 p.m.
There was a nice "portable" screen made of
red and green LEDs. Now
that blue has come down to a reacheable price, that could be done as
a really nice one.
I'd be satisfied with monocolour - but I want decent resolution.
Say, eight by sixteen feet at 100dpi.
Of course, then I'd also want to get fancy, and put a cellular
automaton engine into the silicon behind each pixel, and hook them up
to their neighbours...and clock it all in parallel....
/~\ The ASCII der Mouse
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7:58 p.m.
In article <200601300351.WAA21787 at Sparkle.Rodents.Montreal.QC.CA>,
der Mouse <mouse at rodents.montreal.qc.ca> writes:
Of course, then I'd also want to get fancy, and
put a cellular
automaton engine into the silicon behind each pixel, and hook them up
to their neighbours...and clock it all in parallel....
Now we're talkin! How about VFD graphics modules?
--
"The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ:
<http://www.xmission.com/~legalize/book/>
Pilgrimage: Utah's annual demoparty
<http://pilgrimage.scene.org>
30 Jan
30 Jan
12:16 p.m.
Of course,
then I'd also want to get fancy, and put a cellular
automaton engine into the silicon behind each pixel, and hook them up
to their neighbours...and clock it all in parallel....
Now we're talkin! How about VFD graphics modules? 
29 Jan
29 Jan
10:03 p.m.
Fred Cisin wrote:
On Sun, 29 Jan 2006, Richard wrote:
There was one on eBay recently over here. I can't remember exactly what
the spec was but I think it was 60kVA three-phase power. This one used
clusters of LEDs and was mounted on an artic trailer.
Obviously the power included motors for the hydraulic pumps, but I
suspect they'd be a couple of kW at most and only used during setup.
Didn't follow the auction to the end but apparently if it made its
reserve they'd throw in a rough-but-running artic tractor to tow it with.
Gordon.
Back when Comdex was still active, there were a lot of
technologies used
for billboard sized screens. One of the techniques that I saw was a
billboard made of thousands of 2" CRTs, using each 2" CRT as a single
pixel. Each CRT only displayed 3 "lines", RED, BLUE, and GREEN.
Wow. I'd love to have seen a picture of that
puppy! I wonder how
much power it drew when turned on :-)
Good question.
A lot of the billboard sized screens had trailered generators. I never
knew which were due to amount of power consumption, v which were just a
lack of convenient outlet.
5:57 p.m.
On Sunday 29 January 2006 17:29, Richard wrote:
In article <20060129134635.E24579 at
shell.lmi.net>,
Fred Cisin <cisin at xenosoft.com> writes:
Purdue has one of those at their football stadium - a Sony Jumbotron. Has a
buch of small CRT's they call "cells", which are each a color pixel - three
lines of color on the display, one red, one green, one blue. It doesn't take
a lot of smarts in order to operate one of them.
Pat
--
Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/
The Computer Refuge --- http://computer-refuge.org
On Sun, 29 Jan 2006, Richard wrote:
Wow. I'd love to have seen a picture of that puppy! I wonder how
much power it drew when turned on :-) Presumably you mean 375-475? I can't imagine
displaying 3 lines on a
CRT ;-).
Back when Comdex was still active, there were a lot of technologies used
for billboard sized screens. One of the techniques that I saw was a
billboard made of thousands of 2" CRTs, using each 2" CRT as a single
pixel. Each CRT only displayed 3 "lines", RED, BLUE, and GREEN.
6901
days inactive
6902
days old
14 comments
7 participants
participants (7)
-
chrism3667＠yahoo.com -
cisin＠xenosoft.com -
gordonjcp＠gjcp.net -
legalize＠xmission.com -
mouse＠Rodents.Montreal.QC.CA -
pat＠computer-refuge.org -
sastevens＠earthlink.net