28 Nov
2000
28 Nov
'00
2:30 p.m.
From: CLASSICCMP(a)trailing-edge.com <CLASSICCMP(a)trailing-edge.com>
Does anyone know the designation (as in "P3"
or "P25") of these
long-lived
green and yellow phosphors that were commonly used on
IBM PC and
PC-clone
Between scopes and terminals I have:
P31 blue, ? amber, P1 green and two differnt whites
(vt100 and Vt320 paperwhite).
P1 is the common medium green of older scopes and terminals
P3 and P39 are either amber or white range, I forget
P7 short blue/long yellow (used mostly for scopes and slowscan)
P11 is blue (more toward the medium persistance)
P31 The common scope tubes early 90s (blueish white medium)
There are others but, the codes to them are long forgotten.
Allison
28 Nov
28 Nov
8:51 p.m.
On Tue, 28 Nov 2000 23:30:44 -0500 ajp166
<ajp166(a)bellatlantic.net> wrote:
Between scopes and terminals I have:
P31 blue, ? amber, P1 green and two differnt whites
(vt100 and Vt320 paperwhite).
P1 is the common medium green of older scopes and terminals
P3 and P39 are either amber or white range, I forget
P7 short blue/long yellow (used mostly for scopes and slowscan)
P11 is blue (more toward the medium persistance)
P31 The common scope tubes early 90s (blueish white medium)
This is all very useful information to a collector of old
scopes, terminals and VDUs!
There are others but, the codes to them are long
forgotten.
But surely there's a standards document somewhere that
describes these phoshpors? Chemical composition, colour,
persistence data, that kind of thing? Does anybody have
any idea where I might start looking for that standard (I
may be able to find it in the library here)?
Probably worth putting together a summary for the WWW, if I
can find the standard. No Java, Flash, JavaScript, ActiveX
or MIDI files -- promise! :-)
--
John Honniball
Email: John.Honniball(a)uwe.ac.uk
University of the West of England
29 Nov
29 Nov
1:11 a.m.
At 10:51 AM 11/29/00 +0000, John Honniball wrote:
This is all very useful information to a collector of old
scopes, terminals and VDUs!
That's an interesting quest. Have you tried to contact any CRT
manufacturers and asked them? They should know all of that. Unfortunately
most (all?) of the CRT manufacturers that used to be in the US have moved
to China, Taiwan or Malaysia.
Joe
There are others but, the codes to them are long
forgotten.
But surely there's a standards document somewhere that
describes these phoshpors? Chemical composition, colour,
persistence data, that kind of thing? Does anybody have
any idea where I might start looking for that standard (I
may be able to find it in the library here)?
Probably worth putting together a summary for the WWW, if I
can find the standard. No Java, Flash, JavaScript, ActiveX
or MIDI files -- promise! :-)
5 Dec
5 Dec
11:52 a.m.
New subject: More strange finds
Well digging deeper in the boxes yield a few old
MiniScribe's, a full height 5.25 floppy, the drive belts
still there, a few half-high drives with strobe marking on
the fly-wheel for 50 and 60 Hz.
In a box of cards I find a Tandy memory expansion card, a
apple 128K RAM expansion card and a full length card s/n 139
which looks hand written, the back of the card has pins and
they are wired together.
8554
days inactive
8561
days old
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ajp166＠bellatlantic.net -
John.Honniball＠uwe.ac.uk -
KenzieM＠sympatico.ca -
rigdonj＠intellistar.net