19 Apr
2005
19 Apr
'05
7:14 a.m.
Of the monitors I have, there is mold or ??? under the front glass on
the screens of:
* ADM3 Terminal (or ADM3A, don't remember)
* Soroc IQ120
* HP Terminal (don't recall model)
* DIGITAL monitor (don't recall model, but 12" or so screen)
The HP Terminal was stored in a station wagon, others were stored in the
garage and back porch. I don't remember seeing mold on any monitors used
for the IBM PCs or Apple computers. The weather here is mostly moderate
all year long, and I am about 3 miles from the Pacific Ocean.
Hmm. I've never seen it on one. I expect that the source of the device
and where/how they were stored makes a big difference.
Joe
On Mon, 2005-04-18 at 15:40 -0700, Vintage Computer
Festival wrote:
Another product where you see this effect consistently is with ADM 3A
terminals. The HP300 at the Computer History Museum has the
same "mold" effects, as
does a 2648 I've got in my warehouse. HP CRTs (especially the elongated
ones found on the mentioned machines) seem to be more typically
susceptible to this effect than other CRTs. I wonder what it is about
them?
Yep, I've not seen it on much else. Digico springs to mind, plus a
couple of others that we have whose names escape me right now - but it's
almost exclusively the HP stuff. 
19 Apr
19 Apr
7:51 a.m.
New subject: HP CRT mould update
On Tue, 2005-04-19 at 07:14 -0700, Marvin Johnston wrote:
Of the monitors I have, there is mold or ??? under the
front glass on
the screens of:
* ADM3 Terminal (or ADM3A, don't remember)
* Soroc IQ120
* HP Terminal (don't recall model)
* DIGITAL monitor (don't recall model, but 12" or so screen)
The HP Terminal was stored in a station wagon, others were stored in the
garage and back porch. I don't remember seeing mold on any monitors used
for the IBM PCs or Apple computers. The weather here is mostly moderate
all year long, and I am about 3 miles from the Pacific Ocean.
Do the ADM3 / Soroc / DEC screens obviously have a faceplate whilst the
IBM / Apple ones don't?
I'd just like to rule out that it isn't purely that the affected
monitors have faceplates whilst unaffected ones don't! (implying that
the rot is common to the transparent sealant used in that sort of time
period, rather than it being a specific type of sealant that only some
manufacturers used)
At least the problem seems to be fixable through the hot wire method -
although one person's reports way back of the CRT being damaged using
this method is a little worrying.
If I get time I'll have a look at which of our non-HP screens at
Bletchley have been hit by this - the next time I'm over there is
already scheduled to be a completely manic day though!
cheers
Jules
10:48 a.m.
On Tue, 19 Apr 2005, Marvin Johnston wrote:
Of the monitors I have, there is mold or ??? under the
front glass on
the screens of:
* ADM3 Terminal (or ADM3A, don't remember)
* Soroc IQ120
* HP Terminal (don't recall model)
* DIGITAL monitor (don't recall model, but 12" or so screen)
My Soroc IQ120 also has the problem.
--
Sellam Ismail Vintage Computer Festival
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6:01 p.m.
At 10:48 AM 4/19/05 -0700, you wrote:
On Tue, 19 Apr 2005, Marvin Johnston wrote:
Mine doesn't. I bought seven HP 64000s a couple of years ago and none of
them had the problem. Their (the 64000s) CRTs were all made by Clinton but
they were still perfect. However they were stored on the second floor of a
large barn like building and it was bone dry. However it was un-air
conditioned and within site of the Atlantic coast. I don't know the history
of any of the other systems that I got except for the first HP9845. It had
been stored in a cheap leaky aluminium shed for a number of years and it's
CRT was full of spots. My Soroc came from a surplus store and it's CRT is
perfect but the store had just gotten it and I have no idea where it came
Of the monitors I have, there is mold or ???
under the front glass on
the screens of:
* ADM3 Terminal (or ADM3A, don't remember)
* Soroc IQ120
* HP Terminal (don't recall model)
* DIGITAL monitor (don't recall model, but 12" or so screen)
My Soroc IQ120 also has the problem. from before that.
Joe
--
Sellam Ismail Vintage Computer
Festival
---------------------------------------------------------------------------
---
International Man of Intrigue and Danger
http://www.vintage.org
[ Old computing resources for business || Buy/Sell/Trade Vintage Computers
]
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http://marketplace.vintage.org ]
7:28 p.m.
On Tue, 19 Apr 2005, Joe R. wrote:
Mine doesn't. I bought seven HP 64000s a couple
of years ago and none of
them had the problem. Their (the 64000s) CRTs were all made by Clinton but
they were still perfect. However they were stored on the second floor of a
large barn like building and it was bone dry. However it was un-air
conditioned and within site of the Atlantic coast. I don't know the history
of any of the other systems that I got except for the first HP9845. It had
been stored in a cheap leaky aluminium shed for a number of years and it's
CRT was full of spots. My Soroc came from a surplus store and it's CRT is
perfect but the store had just gotten it and I have no idea where it came
from before that.
My stuff has always been stored in dry areas with fairly stable
temperatures year round so who knows.
Another computer that gets affected that I just remembered is the Imlac.
My Imlac has it bad, and Tom Uban's has it as well.
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
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4 comments
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participants (4)
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julesrichardsonuk＠yahoo.co.uk -
marvin＠rain.org -
rigdonj＠cfl.rr.com -
vcf＠siconic.com