20 Oct
2000
20 Oct
'00
12:37 p.m.
You know, it never dawned on me to tell people about this... i just thought
about it and took a look and was suprised at the statistics :)
For the traffic report of www.classiccmp.org, go to
http://webtrends.tseinc.com/www.classiccmp.org
Regards!
Jay West
PS - I'm still waiting for those two anonymous RK05 drives to show up, but
HP 7900A's will do just fine too :)
21 Oct
21 Oct
7:33 a.m.
New subject: Swapping CRTs
I have an IBM System 23 with a badly burned screen.
The CRT is a 12 inch monochrome green screen. Does
anyone know whether I can replace the CRT with the 12"
green monitor CRT that came with the original IBM PC
(and which are easy to find)? The model no. of that
monitor is 5131?
Even pure speculation as to whether this would work
would be appreciated. Thanks.
8:18 a.m.
New subject: Swapping CRTs
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10:58 a.m.
New subject: Swapping CRTs
> I have an IBM System 23 with a badly burned
screen.
> The CRT is a 12 inch monochrome green screen. Does
> anyone know whether I can replace the CRT with the
12"
> green monitor CRT that came with the original IBM
PC
> (and which are easy to find)? The model no. of
that
monitor is
5131?
IIRC the IBM PC MDA monitor is a 5151, not a 5131,
How many pins does the System 23 CRT have? If it's
got 7 pins in a
'modified B7G' arrangement -- like a 7 pin
miniature
valve with a
seal-off tube in the middle and _no_ plastic shell
with a locator, then
it's likely to work
Basically, there are 2 common classes of monochrome
CRT. 7 pin (modified
B7G) with a 12V heater or 8 pin (B8H) with a 6.3V
heater. Within a class
you're likely to have few problems swapping them.
Keep the yoke with the monitor it goes with -- these
are much less
generic than CRTs. Undo the clamp around the back end
of the yoke and
carefully silde the yoke off towards the back of the
monitor. Don't force
it -- if it won't come off easily, take the clamp
right off, and use a
screwdriver to _carefully_ spread the slits in the
yoke's clamp tube to
free it.
-tony
It's the same 7-pin arrangement according to my
maintenance documentation (I haven't opened up the unit
yet). The documentation also indicates that the CRT is
interchangeable with several other models, which is
encouraging. BTW, you're right, it's a 5151 not a
5131. Thanks for the excellent help.
-W
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ard＠p850ug1.demon.co.uk -
west＠tseinc.com -
wmsmith＠earthlink.net