Re: HP 9845 complete system on auction in Sweden

[Ed via cctalk]

yes if   the tree sap stuff  if  can get fungus in  it.  had that happen to 
microscope lenses in the lab
Ed#
 
 
In a message dated 9/29/2017 2:11:26 P.M. US Mountain Standard Time,  
cctalk@classiccmp.org writes:

On Fri,  29 Sep 2017, Ed via cctalk wrote:
> what  was the orig. bonding  material between   face glass  and  tube? 
just
>  curious

fungus?

Re: HP 9845 complete system on auction in Sweden

[Fred Cisin via cctalk]

On Fri, 29 Sep 2017, Ed via cctalk wrote:

what  was the orig. bonding material between   face glass  and  tube? just
curious


fungus?

Re: HP 9845 complete system on auction in Sweden

[Ed via cctalk]

Paul so the case it self is what held the class in place  then?
Ed#
 
 
In a message dated 9/29/2017 11:00:27 A.M. US Mountain Standard Time,  
cctalk@classiccmp.org writes:

On my  9835A it was Canadian Balsam a common optical bonding material.   
I  bonded the shield on my to the front of the case using epoxy.  I had  
tried tape but it slowly settled to the bottom of the case, I guess my  
tape was not thick enough.  In a very old TV I once had there was  just a 
sheet of plate  glass set into the front of the cabinet in  front of a 
tube that did not have any implosion  protection.

Paul.
>   

Re: HP 9845 complete system on auction in Sweden

[Paul Berger via cctalk]

On 2017-09-29 2:02 PM, Ed via cctalk wrote:

Cory - good  suggestion about the double sided  tape.
  
what  was the orig. bonding material between   face glass  and  tube? just

curious
Ed#
On my 9835A it was Canadian Balsam a common optical bonding material.   
I bonded the shield on my to the front of the case using epoxy.  I had 
tried tape but it slowly settled to the bottom of the case, I guess my 
tape was not thick enough.  In a very old TV I once had there was just a 
sheet of plate  glass set into the front of the cabinet in front of a 
tube that did not have any implosion protection.


Paul.
  
  
In a message dated 9/26/2017 5:29:30 A.M. US Mountain Standard Time,

coryheisterk...@gmail.com writes:

  
  


It's the understood chemical decomposition of the  adhesive that holds the
screen shield to the CRT.  It's pretty much  inevitable, from what I
understand.  The solution is to separate the  shield from the CRT, clean the 
face
of the CRT and reattach the  shield.  Some people don't reattach it, and some
people think they are  risking serious injury - no opinion. Will the newer
adhesives hold up  better?  We hope so.  -- Ian

--

Ian S. King,  MSIS, MSCS, Ph.D. Candidate
The Information School








A common trick amongst TV collectors with the  large 23" round CRTs is to
carefully remove the tube and place it face down in  a kiddy pool of lukewarm
water. Let it sit an hour or two in the sun and the  faceplate will slide
right off.


To re-adhere the glass after cleaning, one technique is  to use double
sided foam tape on the face around the perimeter; similar  thickness to the
original PVA and holds well, especially if under slight  compression once the
tube is reinstalled.  -C

Re: HP 9845 complete system on auction in Sweden

[Ed via cctalk]

Cory - good  suggestion about the double sided  tape.
 
what  was the orig. bonding material between   face glass  and  tube? just 
curious
Ed#
 
 
In a message dated 9/26/2017 5:29:30 A.M. US Mountain Standard Time,  
coryheisterk...@gmail.com writes:

 
 

It's the understood chemical decomposition of the  adhesive that holds the 
screen shield to the CRT.  It's pretty much  inevitable, from what I 
understand.  The solution is to separate the  shield from the CRT, clean the 
face 
of the CRT and reattach the  shield.  Some people don't reattach it, and some 
people think they are  risking serious injury - no opinion. Will the newer 
adhesives hold up  better?  We hope so.  -- Ian 

--

Ian S. King,  MSIS, MSCS, Ph.D. Candidate
The Information School








A common trick amongst TV collectors with the  large 23" round CRTs is to 
carefully remove the tube and place it face down in  a kiddy pool of lukewarm 
water. Let it sit an hour or two in the sun and the  faceplate will slide 
right off. 


To re-adhere the glass after cleaning, one technique is  to use double 
sided foam tape on the face around the perimeter; similar  thickness to the 
original PVA and holds well, especially if under slight  compression once the 
tube is reinstalled.  -C

Re: HP 9845 complete system on auction in Sweden

[Cory Heisterkamp via cctalk]

On Tue, Sep 26, 2017 at 12:21 AM, Ed Sharpe via cctalk <
cctalk@classiccmp.org> wrote:

> we see this same effect in large studio cameras on board monitors they
> have. we have just left as us as the large all tube innards do not work
> alas  Ed#
>
> Sent from AOL Mobile Mail
>
> On Monday, September 25, 2017 Ian S. King  wrote:
>
> On Mon, Sep 25, 2017 at 10:37 AM,  wrote:
>
> Folks - Any idea what causes the screen rot?
>
>
>
> also  any preventative measures to  keep it  from happening or spreading?
>
> Ed#
>
>
> It's the understood chemical decomposition of the adhesive that holds the
> screen shield to the CRT.  It's pretty much inevitable, from what I
> understand.  The solution is to separate the shield from the CRT, clean the
> face of the CRT and reattach the shield.  Some people don't reattach it,
> and some people think they are risking serious injury - no opinion. Will
> the newer adhesives hold up better?  We hope so.  -- Ian
>
> --
>
> Ian S. King, MSIS, MSCS, Ph.D. Candidate
> The Information School
>
>
A common trick amongst TV collectors with the large 23" round CRTs is to
carefully remove the tube and place it face down in a kiddy pool of
lukewarm water. Let it sit an hour or two in the sun and the faceplate will
slide right off.

To re-adhere the glass after cleaning, one technique is to use double sided
foam tape on the face around the perimeter; similar thickness to the
original PVA and holds well, especially if under slight compression once
the tube is reinstalled. -C

Re: HP 9845 complete system on auction in Sweden

[Ed Sharpe via cctalk]

we see this same effect in large studio cameras on board monitors they have. we 
have just left as us as the large all tube innards do not work alas  Ed#

Sent from AOL Mobile Mail

On Monday, September 25, 2017 Ian S. King  wrote:

On Mon, Sep 25, 2017 at 10:37 AM,  wrote:

Folks - Any idea what causes the screen rot?

 

also  any preventative measures to  keep it  from happening or spreading?

Ed#

 

 


It's the understood chemical decomposition of the adhesive that holds the 
screen shield to the CRT.  It's pretty much inevitable, from what I understand. 
 The solution is to separate the shield from the CRT, clean the face of the CRT 
and reattach the shield.  Some people don't reattach it, and some people think 
they are risking serious injury - no opinion. Will the newer adhesives hold up 
better?  We hope so.  -- Ian 


-- 

Ian S. King, MSIS, MSCS, Ph.D. Candidate
The Information School

Dissertation: "Why the Conversation Mattered: Constructing a Sociotechnical 
Narrative Through a Design Lens


Principal Investigator, "Reflections on Early Computing and Social Change", UW 
IRB #42619


Archivist, Voices From the Rwanda Tribunal 

Value Sensitive Design Research Lab


University of Washington

There is an old Vulcan saying: "Only Nixon could go to China." 

Re: HP 9845 complete system on auction in Sweden

[Ian S. King via cctalk]

On Mon, Sep 25, 2017 at 10:37 AM,  wrote:

> Folks - Any idea what causes the screen rot?
>
> also  any preventative measures to  keep it  from happening or spreading?
> Ed#
>
>
>
> It's the understood chemical decomposition of the adhesive that holds the
screen shield to the CRT.  It's pretty much inevitable, from what I
understand.  The solution is to separate the shield from the CRT, clean the
face of the CRT and reattach the shield.  Some people don't reattach it,
and some people think they are risking serious injury - no opinion. Will
the newer adhesives hold up better?  We hope so.  -- Ian

-- 
Ian S. King, MSIS, MSCS, Ph.D. Candidate
The Information School 
Dissertation: "Why the Conversation Mattered: Constructing a Sociotechnical
Narrative Through a Design Lens

Principal Investigator, "Reflections on Early Computing and Social Change",
UW IRB #42619

Archivist, Voices From the Rwanda Tribunal 
Value Sensitive Design Research Lab 

University of Washington

There is an old Vulcan saying: "Only Nixon could go to China."

Re: HP 9845 complete system on auction in Sweden

[Ed via cctalk]

Folks - Any idea what causes the screen rot?
 
also  any preventative measures to  keep it  from happening  or spreading?
Ed#
 
 
 
 
In a message dated 9/25/2017 10:20:36 A.M. US Mountain Standard Time,  
isk...@uw.edu writes:

 
On Sun, Sep 24, 2017 at 8:13 PM, Ed via cctalk  
wrote:

The  shipping cost  would be obscene!
Ed#


In a message dated  9/24/2017 6:57:29 P.M. US Mountain Standard Time,

cctalk@classiccmp.org  writes:

> On  I Sep 23, 2017, at 4:23 PM, Chuck Guzis via  cctalk
  wrote:
> The 7970E comes in an HP-IB  version

Indeed, and  I even have one of these beautiful tapes! I managed  to
interface it  to my HP 85 but that was very hard. It required bus sniffing  
work,  an
FPGA adapter, and making an HP 85 "driver" for the thing (see  the  result
in a demo here: https://youtu.be/YS9dGYUbNd0). Great to know the  same  tape
works out the box on an HP 9845. Yet one more reason for  me to get one  
;-).
But my, from Sweden, that's going to be a  monster shipping and  customs
headache.
Marc







I  have one of these with pretty bad screen rot, and I'm not sure if my 
HPIB  controller is working right - but the system itself runs pretty well.   
One of my local collector friends has developed an approach to pull the face  
shield and replace the adhesive - on my list of things to do  --  Ian 


-- 

 
 
 
 
 
 
 
 
 
 
Ian S. King, MSIS, MSCS, Ph.D. Candidate
_The  Information School_ (http://ischool.uw.edu/) 

Dissertation: "Why the Conversation Mattered: Constructing a  
Sociotechnical Narrative Through a Design Lens



Principal Investigator, "Reflections on  Early Computing and Social 
Change", UW IRB #42619


Archivist, _Voices From the Rwanda  Tribunal_ (http://tribunalvoices.org/)  
_Value Sensitive Design Research Lab_ (http://vsdesign.org/) 

University of Washington

There is an old Vulcan saying: "Only Nixon  could go to China." 

Re: HP 9845 complete system on auction in Sweden

[Ian S. King via cctalk]

On Sun, Sep 24, 2017 at 8:13 PM, Ed via cctalk 
wrote:

> The shipping cost  would be obscene!
> Ed#
>
>
> In a message dated 9/24/2017 6:57:29 P.M. US Mountain Standard Time,
> cctalk@classiccmp.org writes:
>
> > On  I Sep 23, 2017, at 4:23 PM, Chuck Guzis via cctalk
>  wrote:
> > The 7970E comes in an HP-IB  version
>
> Indeed, and I even have one of these beautiful tapes! I managed  to
> interface it to my HP 85 but that was very hard. It required bus sniffing
> work, an
> FPGA adapter, and making an HP 85 "driver" for the thing (see the  result
> in a demo here: https://youtu.be/YS9dGYUbNd0). Great to know the same
> tape
> works out the box on an HP 9845. Yet one more reason for me to get one
> ;-).
> But my, from Sweden, that's going to be a monster shipping and customs
> headache.
> Marc
>
>
>
I have one of these with pretty bad screen rot, and I'm not sure if my HPIB
controller is working right - but the system itself runs pretty well.  One
of my local collector friends has developed an approach to pull the face
shield and replace the adhesive - on my list of things to do  -- Ian

-- 
Ian S. King, MSIS, MSCS, Ph.D. Candidate
The Information School 
Dissertation: "Why the Conversation Mattered: Constructing a Sociotechnical
Narrative Through a Design Lens

Principal Investigator, "Reflections on Early Computing and Social Change",
UW IRB #42619

Archivist, Voices From the Rwanda Tribunal 
Value Sensitive Design Research Lab 

University of Washington

There is an old Vulcan saying: "Only Nixon could go to China."

Re: HP 9845 complete system on auction in Sweden

[Ed via cctalk]

The shipping cost  would be obscene!
Ed#
 
 
In a message dated 9/24/2017 6:57:29 P.M. US Mountain Standard Time,  
cctalk@classiccmp.org writes:

> On  I Sep 23, 2017, at 4:23 PM, Chuck Guzis via cctalk  
 wrote:
> The 7970E comes in an HP-IB  version

Indeed, and I even have one of these beautiful tapes! I managed  to 
interface it to my HP 85 but that was very hard. It required bus sniffing  
work, an 
FPGA adapter, and making an HP 85 "driver" for the thing (see the  result 
in a demo here: https://youtu.be/YS9dGYUbNd0). Great to know the same  tape 
works out the box on an HP 9845. Yet one more reason for me to get one  ;-). 
But my, from Sweden, that's going to be a monster shipping and customs  
headache.
Marc

Re: HP 9845 complete system on auction in Sweden

[Curious Marc via cctalk]

> On I Sep 23, 2017, at 4:23 PM, Chuck Guzis via cctalk  
> wrote:
> The 7970E comes in an HP-IB version

Indeed, and I even have one of these beautiful tapes! I managed to interface it 
to my HP 85 but that was very hard. It required bus sniffing work, an FPGA 
adapter, and making an HP 85 "driver" for the thing (see the result in a demo 
here: https://youtu.be/YS9dGYUbNd0). Great to know the same tape works out the 
box on an HP 9845. Yet one more reason for me to get one ;-). But my, from 
Sweden, that's going to be a monster shipping and customs headache.
Marc

Re: HP 9845 complete system on auction in Sweden

[Ed via cctalk]

the  tape  drive  was an  hpib  version as was  used on the later hp 3000 
systems.
Ed#  _www.smecc.org_ (http://www.smecc.org)  
 
 
In a message dated 9/23/2017 4:11:19 P.M. US Mountain Standard Time,  
cctalk@classiccmp.org writes:

On Sep  22, 2017 11:47 PM, "Curious Marc via cctalk"  

wrote:

I didn't know you could  interface a 9845 with a 7970 tape drive.


The 9845 was the  top-of-the-line workstation. It could be interfaced to
almost everything  computer-controlable that HP  made.

Re: HP 9845 complete system on auction in Sweden

[Chuck Guzis via cctalk]

On 09/23/2017 04:11 PM, Eric Smith via cctalk wrote:
> On Sep 22, 2017 11:47 PM, "Curious Marc via cctalk" 
> wrote:
> 
> I didn't know you could interface a 9845 with a 7970 tape drive.
> 
> 
> The 9845 was the top-of-the-line workstation. It could be interfaced to
> almost everything computer-controlable that HP made.

The 7970E comes in an HP-IB version.

Re: HP 9845 complete system on auction in Sweden

[Eric Smith via cctalk]

On Sep 22, 2017 11:47 PM, "Curious Marc via cctalk" 
wrote:

I didn't know you could interface a 9845 with a 7970 tape drive.


The 9845 was the top-of-the-line workstation. It could be interfaced to
almost everything computer-controlable that HP made.

Re: HP 9845 complete system on auction in Sweden

[Noel Chiappa via cctalk]

On Fri, Sep 22, 2017 at 7:14 AM, Torfinn Ingolfsen wrote:

> Unfortunately, I don't have space for such a large system.

I hope someone can take this system, to prevent its being scapped!

Noel

Re: HP 9845 complete system on auction in Sweden

[Curious Marc via cctalk]

Wow, looking almost new! I didn't know you could interface a 9845 with a 7970 
tape drive.
Marc

On Sep 22, 2017, at 12:23 AM, Pontus Pihlgren via cctalk 
 wrote:

Hi All

There is a very nice looking HP 9845 with peripherals and documentation 
for sale in Sweden, on ebay owned auction-site Tradera:

https://www.tradera.com/item/340854/290566778/hewlett-packard-9845-datorsystem

The system was previously on "blocket", which is more like craigslist, 
for twice the asking price a few years ago.

I have no connection to the seller, I just hope that someone who knows 
how to value the system can take care of it. I think the number of 
potential buyers in Sweden is low :)

Regards,
Pontus.

Re: HP 9845 complete system on auction in Sweden

[Eric Christopherson via cctalk]

On Fri, Sep 22, 2017 at 7:14 AM, Torfinn Ingolfsen via cctalk <
cctalk@classiccmp.org> wrote:

> On Fri, Sep 22, 2017 at 9:23 AM, Pontus Pihlgren via cctalk
>  wrote:
> > Hi All
> >
> > There is a very nice looking HP 9845 with peripherals and documentation
> > for sale in Sweden, on ebay owned auction-site Tradera:
> >
> > https://www.tradera.com/item/340854/290566778/hewlett-
> packard-9845-datorsystem
> >
>
> Nice!
> I really like the old HP 98xx systems.
> Unfortunately, I don't have space for such a large system.


I just did a double-take at that keyboard -- reminds me of a VIC-20.

Re: HP 9845 complete system on auction in Sweden

[Torfinn Ingolfsen via cctalk]

On Fri, Sep 22, 2017 at 9:23 AM, Pontus Pihlgren via cctalk
 wrote:
> Hi All
>
> There is a very nice looking HP 9845 with peripherals and documentation
> for sale in Sweden, on ebay owned auction-site Tradera:
>
> https://www.tradera.com/item/340854/290566778/hewlett-packard-9845-datorsystem
>

Nice!
I really like the old HP 98xx systems.
Unfortunately, I don't have space for such a large system.
-- 
Regards,
Torfinn Ingolfsen

HP 9845 complete system on auction in Sweden

[Pontus Pihlgren via cctalk]

Hi All

There is a very nice looking HP 9845 with peripherals and documentation 
for sale in Sweden, on ebay owned auction-site Tradera:

https://www.tradera.com/item/340854/290566778/hewlett-packard-9845-datorsystem

The system was previously on "blocket", which is more like craigslist, 
for twice the asking price a few years ago.

I have no connection to the seller, I just hope that someone who knows 
how to value the system can take care of it. I think the number of 
potential buyers in Sweden is low :)

Regards,
Pontus.