开云体育

On Wed, Nov 07, 2012 at 08:08:06PM -0000, fred wrote:

Tommorow a friend brings in a HP9100A for repair. It is in unknown working condition founded under a floor but optical inside/out in good shape. ( and for me a sinclair multimeter and finaly I get a real HP35)

I have plenty experience in repair ( most meaurement and radio stuff, from vector netork anlysers to digital multimeters, but I'm an analog guy)

But this is a sort of "computer" without the CPU, ICs ect. So very new for me.

It has torroid memory, a sort of multilayer PCB ROM and according to the owner about 300 transistors.

Do some people here have experience and tips/advise with this piece of art. ( and HP history)

Fred pa4tim

----- Original Message -----
From: "fred" <fredschneider@...>
To: <hp_agilent_equipment@...>
Sent: Wednesday, November 07, 2012 12:08 PM
Subject: [hp_agilent_equipment] Repair HP 9100A calculator

Tommorow a friend brings in a HP9100A for repair. It is in unknown working condition founded under a floor but optical inside/out in good shape. ( and for me a sinclair multimeter and finaly I get a real HP35)

I have plenty experience in repair ( most meaurement and radio stuff, from vector netork anlysers to digital multimeters, but I'm an analog guy)

But this is a sort of "computer" without the CPU, ICs ect. So very new for me.

It has torroid memory, a sort of multilayer PCB ROM and according to the owner about 300 transistors.

Do some people here have experience and tips/advise with this piece of art. ( and HP history)

Fred pa4tim

I can't give you any help fixing it but I worked for -hp- when they came out. We had the prototype in our office for a time. I used to stay after work and play with it. At the time a fascinating machine.
I also bought a 35 on discount when they came out. Sent it in once for repair and upgrade. Had it a long time but a burglar got it.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk@...

On 11/7/2012 12:08 PM, fred wrote:

Tommorow a friend brings in a HP9100A for repair. It is in unknown working condition founded under a floor but optical inside/out in good shape. ( and for me a sinclair multimeter and finaly I get a real HP35)

I have plenty experience in repair ( most meaurement and radio stuff, from vector netork anlysers to digital multimeters, but I'm an analog guy)

But this is a sort of "computer" without the CPU, ICs ect. So very new for me.

It has torroid memory, a sort of multilayer PCB ROM and according to the owner about 300 transistors.

Do some people here have experience and tips/advise with this piece of art. ( and HP history)

Fred pa4tim

_

----- Original Message -----
From: "fred" <fredschneider@...>
To: <hp_agilent_equipment@...>
Sent: Thursday, November 08, 2012 9:08 AM
Subject: [hp_agilent_equipment] Repair HP 9100A calculator

Tommorow a friend brings in a HP9100A for repair. It is in unknown working condition founded under a floor but optical inside/out in good shape. ( and for me a sinclair multimeter and finaly I get a real HP35)

I have plenty experience in repair ( most meaurement and radio stuff, from vector netork anlysers to digital multimeters, but I'm an analog guy)

But this is a sort of "computer" without the CPU, ICs ect. So very new for me.

It has torroid memory, a sort of multilayer PCB ROM and according to the owner about 300 transistors.

Do some people here have experience and tips/advise with this piece of art. ( and HP history)

Fred pa4tim



------------------------------------

Yahoo! Groups Links

--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.

--- In hp_agilent_equipment@..., "Dave Brown" <tractorb@...> wrote:

Several years ago I dealt with some real experts in repair of this
calculator that are probably still accessible via the MOHPCalc site and
email lists.
Mine is yet again in need of repair following the earthquakes we had here a
year or two ago but I'm hopeful that it will go again despite the mechanical
damage to the case etc.
DaveB
Christchurch, NZ
PS- I have some rolls of the special paper used in the 9120A printer if your
friend has one of those. Not in perfect condition anymore but still useable.

----- Original Message -----
From: "fred" <fredschneider@...>
To: <hp_agilent_equipment@...>
Sent: Thursday, November 08, 2012 9:08 AM
Subject: [hp_agilent_equipment] Repair HP 9100A calculator

Tommorow a friend brings in a HP9100A for repair. It is in unknown working
condition founded under a floor but optical inside/out in good shape. (
and for me a sinclair multimeter and finaly I get a real HP35)

I have plenty experience in repair ( most meaurement and radio stuff, from
vector netork anlysers to digital multimeters, but I'm an analog guy)

But this is a sort of "computer" without the CPU, ICs ect. So very new
for me.

It has torroid memory, a sort of multilayer PCB ROM and according to the
owner about 300 transistors.

Do some people here have experience and tips/advise with this piece of
art. ( and HP history)

Fred pa4tim



------------------------------------

Yahoo! Groups Links

--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.

--- In hp_agilent_equipment@..., "fred" <fredschneider@...> wrote:

Thanks for all the tips and links

Today it came in. It turns out to be a 9100B (but he has a A too) Inside it misses two indicator lamps but for the rest it looks complete and untouched. The only thing that worries me a lot is the CRT. It is transparant and the clamp that holds it is broken. Never seen a transparant CRT. You can see the getter, the Phosphor but I also see a white spot about 1" width and 1/2" high. It looks like it is under the getter but I do not hope this means the CRT is cracked...

Stange thing is all the motorola transistors are painted red on top. Why ?

Fred PA4TIM

--- In hp_agilent_equipment@..., "Dave Brown" <tractorb@> wrote:

Several years ago I dealt with some real experts in repair of this
calculator that are probably still accessible via the MOHPCalc site and
email lists.
Mine is yet again in need of repair following the earthquakes we had here a
year or two ago but I'm hopeful that it will go again despite the mechanical
damage to the case etc.
DaveB
Christchurch, NZ
PS- I have some rolls of the special paper used in the 9120A printer if your
friend has one of those. Not in perfect condition anymore but still useable.

----- Original Message -----
From: "fred" <fredschneider@>
To: <hp_agilent_equipment@...>
Sent: Thursday, November 08, 2012 9:08 AM
Subject: [hp_agilent_equipment] Repair HP 9100A calculator

Tommorow a friend brings in a HP9100A for repair. It is in unknown working
condition founded under a floor but optical inside/out in good shape. (
and for me a sinclair multimeter and finaly I get a real HP35)

I have plenty experience in repair ( most meaurement and radio stuff, from
vector netork anlysers to digital multimeters, but I'm an analog guy)

But this is a sort of "computer" without the CPU, ICs ect. So very new
for me.

It has torroid memory, a sort of multilayer PCB ROM and according to the
owner about 300 transistors.

Do some people here have experience and tips/advise with this piece of
art. ( and HP history)

Fred pa4tim



------------------------------------

Yahoo! Groups Links

--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.

--- In hp_agilent_equipment@..., "raymonddompfrank" <raymond@...> wrote:

I'm afraid that a milky-white patch on the glass where the getter is, usually means that the vacuum is gone. Normally, the spot is shiny metal coloured (and it is shiny metal...)

Raymond

--- In hp_agilent_equipment@..., "fred" <fredschneider@> wrote:

Thanks for all the tips and links

Today it came in. It turns out to be a 9100B (but he has a A too) Inside it misses two indicator lamps but for the rest it looks complete and untouched. The only thing that worries me a lot is the CRT. It is transparant and the clamp that holds it is broken. Never seen a transparant CRT. You can see the getter, the Phosphor but I also see a white spot about 1" width and 1/2" high. It looks like it is under the getter but I do not hope this means the CRT is cracked...

Stange thing is all the motorola transistors are painted red on top. Why ?

Fred PA4TIM

--- In hp_agilent_equipment@..., "Dave Brown" <tractorb@> wrote:

Several years ago I dealt with some real experts in repair of this
calculator that are probably still accessible via the MOHPCalc site and
email lists.
Mine is yet again in need of repair following the earthquakes we had here a
year or two ago but I'm hopeful that it will go again despite the mechanical
damage to the case etc.
DaveB
Christchurch, NZ
PS- I have some rolls of the special paper used in the 9120A printer if your
friend has one of those. Not in perfect condition anymore but still useable.

----- Original Message -----
From: "fred" <fredschneider@>
To: <hp_agilent_equipment@...>
Sent: Thursday, November 08, 2012 9:08 AM
Subject: [hp_agilent_equipment] Repair HP 9100A calculator

Tommorow a friend brings in a HP9100A for repair. It is in unknown working
condition founded under a floor but optical inside/out in good shape. (
and for me a sinclair multimeter and finaly I get a real HP35)

I have plenty experience in repair ( most meaurement and radio stuff, from
vector netork anlysers to digital multimeters, but I'm an analog guy)

But this is a sort of "computer" without the CPU, ICs ect. So very new
for me.

It has torroid memory, a sort of multilayer PCB ROM and according to the
owner about 300 transistors.

Do some people here have experience and tips/advise with this piece of
art. ( and HP history)

Fred pa4tim



------------------------------------

Yahoo! Groups Links

--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.

--- In hp_agilent_equipment@..., "raymonddompfrank" <raymond@...> wrote:

Just realized that I should have added that sometimes even in good tubes the patch can be partly whitish instead of mirror-like. Sorry to cause confusion.
I sincerely hope that the tube is ok because I guess a replacement would be very difficult to find.
A glowing heater would be proof of the vacuum being intact (and at least some of the PSU).

Raymond


--- In hp_agilent_equipment@..., "raymonddompfrank" <raymond@> wrote:

I'm afraid that a milky-white patch on the glass where the getter is, usually means that the vacuum is gone. Normally, the spot is shiny metal coloured (and it is shiny metal...)

Raymond

--- In hp_agilent_equipment@..., "fred" <fredschneider@> wrote:

Thanks for all the tips and links

Today it came in. It turns out to be a 9100B (but he has a A too) Inside it misses two indicator lamps but for the rest it looks complete and untouched. The only thing that worries me a lot is the CRT. It is transparant and the clamp that holds it is broken. Never seen a transparant CRT. You can see the getter, the Phosphor but I also see a white spot about 1" width and 1/2" high. It looks like it is under the getter but I do not hope this means the CRT is cracked...

Stange thing is all the motorola transistors are painted red on top. Why ?

Fred PA4TIM

--- In hp_agilent_equipment@..., "Dave Brown" <tractorb@> wrote:

Several years ago I dealt with some real experts in repair of this
calculator that are probably still accessible via the MOHPCalc site and
email lists.
Mine is yet again in need of repair following the earthquakes we had here a
year or two ago but I'm hopeful that it will go again despite the mechanical
damage to the case etc.
DaveB
Christchurch, NZ
PS- I have some rolls of the special paper used in the 9120A printer if your
friend has one of those. Not in perfect condition anymore but still useable.

----- Original Message -----
From: "fred" <fredschneider@>
To: <hp_agilent_equipment@...>
Sent: Thursday, November 08, 2012 9:08 AM
Subject: [hp_agilent_equipment] Repair HP 9100A calculator

Tommorow a friend brings in a HP9100A for repair. It is in unknown working
condition founded under a floor but optical inside/out in good shape. (
and for me a sinclair multimeter and finaly I get a real HP35)

I have plenty experience in repair ( most meaurement and radio stuff, from
vector netork anlysers to digital multimeters, but I'm an analog guy)

But this is a sort of "computer" without the CPU, ICs ect. So very new
for me.

It has torroid memory, a sort of multilayer PCB ROM and according to the
owner about 300 transistors.

Do some people here have experience and tips/advise with this piece of
art. ( and HP history)

Fred pa4tim



------------------------------------

Yahoo! Groups Links

--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.

--- In hp_agilent_equipment@..., "fred" <fredschneider@...> wrote:

Bad news.
The CRT is dead, it is broken in two in the socket. :-(
so this is the end I'm afraid.

Its a HP-5083-1551
28cm long
5"diagonal (or 4,7"I do not know how they measure
-3500V cathode, 6,3VAC heather
14 pin, 12 used (2 heather, cathode, 4 grids, 2 vertical and 2 horizontal plates.

Maybe I can trace the signals somewhere and use an XY monitor so I can try the rest. If all works I can try to find a replacement (I'm not afraid for altering circuits or building interface circuits.

There was an external monitor but the 9100 had to be modified and the 3 connection points are not connected. I can not find anything about the mod.

Fred


--- In hp_agilent_equipment@..., "raymonddompfrank" <raymond@> wrote:

Just realized that I should have added that sometimes even in good tubes the patch can be partly whitish instead of mirror-like. Sorry to cause confusion.
I sincerely hope that the tube is ok because I guess a replacement would be very difficult to find.
A glowing heater would be proof of the vacuum being intact (and at least some of the PSU).

Raymond


--- In hp_agilent_equipment@..., "raymonddompfrank" <raymond@> wrote:

I'm afraid that a milky-white patch on the glass where the getter is, usually means that the vacuum is gone. Normally, the spot is shiny metal coloured (and it is shiny metal...)

Raymond

--- In hp_agilent_equipment@..., "fred" <fredschneider@> wrote:

Thanks for all the tips and links

Today it came in. It turns out to be a 9100B (but he has a A too) Inside it misses two indicator lamps but for the rest it looks complete and untouched. The only thing that worries me a lot is the CRT. It is transparant and the clamp that holds it is broken. Never seen a transparant CRT. You can see the getter, the Phosphor but I also see a white spot about 1" width and 1/2" high. It looks like it is under the getter but I do not hope this means the CRT is cracked...

Stange thing is all the motorola transistors are painted red on top. Why ?

Fred PA4TIM

--- In hp_agilent_equipment@..., "Dave Brown" <tractorb@> wrote:

Several years ago I dealt with some real experts in repair of this
calculator that are probably still accessible via the MOHPCalc site and
email lists.
Mine is yet again in need of repair following the earthquakes we had here a
year or two ago but I'm hopeful that it will go again despite the mechanical
damage to the case etc.
DaveB
Christchurch, NZ
PS- I have some rolls of the special paper used in the 9120A printer if your
friend has one of those. Not in perfect condition anymore but still useable.

----- Original Message -----
From: "fred" <fredschneider@>
To: <hp_agilent_equipment@...>
Sent: Thursday, November 08, 2012 9:08 AM
Subject: [hp_agilent_equipment] Repair HP 9100A calculator

Tommorow a friend brings in a HP9100A for repair. It is in unknown working
condition founded under a floor but optical inside/out in good shape. (
and for me a sinclair multimeter and finaly I get a real HP35)

I have plenty experience in repair ( most meaurement and radio stuff, from
vector netork anlysers to digital multimeters, but I'm an analog guy)

But this is a sort of "computer" without the CPU, ICs ect. So very new
for me.

It has torroid memory, a sort of multilayer PCB ROM and according to the
owner about 300 transistors.

Do some people here have experience and tips/advise with this piece of
art. ( and HP history)

Fred pa4tim



------------------------------------

Yahoo! Groups Links

--
This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.

----- Original Message -----
From: fred
To: hp_agilent_equipment@...
Sent: Saturday, November 10, 2012 11:09 AM
Subject: [hp_agilent_equipment] Re: Repair HP 9100A calculator



Bad news.
The CRT is dead, it is broken in two in the socket. :-(
so this is the end I'm afraid.

Its a HP-5083-1551
28cm long
5"diagonal (or 4,7"I do not know how they measure
-3500V cathode, 6,3VAC heather
14 pin, 12 used (2 heather, cathode, 4 grids, 2 vertical and 2 horizontal plates.

Maybe I can trace the signals somewhere and use an XY monitor so I can try the rest. If all works I can try to find a replacement (I'm not afraid for altering circuits or building interface circuits.

There was an external monitor but the 9100 had to be modified and the 3 connection points are not connected. I can not find anything about the mod.

Fred

--- In hp_agilent_equipment@..., "raymonddompfrank" <raymond@...> wrote:
>
> Just realized that I should have added that sometimes even in good tubes the patch can be partly whitish instead of mirror-like. Sorry to cause confusion.
> I sincerely hope that the tube is ok because I guess a replacement would be very difficult to find.
> A glowing heater would be proof of the vacuum being intact (and at least some of the PSU).
>
> Raymond
>
>
> --- In hp_agilent_equipment@..., "raymonddompfrank" <raymond@> wrote:
> >
> > I'm afraid that a milky-white patch on the glass where the getter is, usually means that the vacuum is gone. Normally, the spot is shiny metal coloured (and it is shiny metal...)
> >
> > Raymond
> >
> > --- In hp_agilent_equipment@..., "fred" <fredschneider@> wrote:
> > >
> > > Thanks for all the tips and links
> > >
> > > Today it came in. It turns out to be a 9100B (but he has a A too) Inside it misses two indicator lamps but for the rest it looks complete and untouched. The only thing that worries me a lot is the CRT. It is transparant and the clamp that holds it is broken. Never seen a transparant CRT. You can see the getter, the Phosphor but I also see a white spot about 1" width and 1/2" high. It looks like it is under the getter but I do not hope this means the CRT is cracked...
> > >
> > > Stange thing is all the motorola transistors are painted red on top. Why ?
> > >
> > > Fred PA4TIM
> > >
> > > --- In hp_agilent_equipment@..., "Dave Brown" <tractorb@> wrote:
> > > >
> > > > Several years ago I dealt with some real experts in repair of this
> > > > calculator that are probably still accessible via the MOHPCalc site and
> > > > email lists.
> > > > Mine is yet again in need of repair following the earthquakes we had here a
> > > > year or two ago but I'm hopeful that it will go again despite the mechanical
> > > > damage to the case etc.
> > > > DaveB
> > > > Christchurch, NZ
> > > > PS- I have some rolls of the special paper used in the 9120A printer if your
> > > > friend has one of those. Not in perfect condition anymore but still useable.
> > > >
> > > > ----- Original Message -----
> > > > From: "fred" <fredschneider@>
> > > > To: <hp_agilent_equipment@...>
> > > > Sent: Thursday, November 08, 2012 9:08 AM
> > > > Subject: [hp_agilent_equipment] Repair HP 9100A calculator
> > > >
> > > >
> > > > > Tommorow a friend brings in a HP9100A for repair. It is in unknown working
> > > > > condition founded under a floor but optical inside/out in good shape. (
> > > > > and for me a sinclair multimeter and finaly I get a real HP35)
> > > > >
> > > > > I have plenty experience in repair ( most meaurement and radio stuff, from
> > > > > vector netork anlysers to digital multimeters, but I'm an analog guy)
> > > > >
> > > > > But this is a sort of "computer" without the CPU, ICs ect. So very new
> > > > > for me.
> > > > >
> > > > > It has torroid memory, a sort of multilayer PCB ROM and according to the
> > > > > owner about 300 transistors.
> > > > >
> > > > > Do some people here have experience and tips/advise with this piece of
> > > > > art. ( and HP history)
> > > > >
> > > > > Fred pa4tim
> > > > >
> > > > >
> > > > >
> > > > > ------------------------------------
> > > > >
> > > > > Yahoo! Groups Links
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > > --
> > > > This message has been scanned for viruses and
> > > > dangerous content by MailScanner, and is
> > > > believed to be clean.
> > > >
> > >
> >
>

--- In hp_agilent_equipment@..., "Tom Miller" <tmiller11147@...> wrote:

Does the tube have a PDA electrode on the front?


----- Original Message -----
From: fred
To: hp_agilent_equipment@...
Sent: Saturday, November 10, 2012 11:09 AM
Subject: [hp_agilent_equipment] Re: Repair HP 9100A calculator



Bad news.
The CRT is dead, it is broken in two in the socket. :-(
so this is the end I'm afraid.

Its a HP-5083-1551
28cm long
5"diagonal (or 4,7"I do not know how they measure
-3500V cathode, 6,3VAC heather
14 pin, 12 used (2 heather, cathode, 4 grids, 2 vertical and 2 horizontal plates.

Maybe I can trace the signals somewhere and use an XY monitor so I can try the rest. If all works I can try to find a replacement (I'm not afraid for altering circuits or building interface circuits.

There was an external monitor but the 9100 had to be modified and the 3 connection points are not connected. I can not find anything about the mod.

Fred

--- In hp_agilent_equipment@..., "raymonddompfrank" <raymond@> wrote:
>
> Just realized that I should have added that sometimes even in good tubes the patch can be partly whitish instead of mirror-like. Sorry to cause confusion.
> I sincerely hope that the tube is ok because I guess a replacement would be very difficult to find.
> A glowing heater would be proof of the vacuum being intact (and at least some of the PSU).
>
> Raymond
>
>
> --- In hp_agilent_equipment@..., "raymonddompfrank" <raymond@> wrote:
> >
> > I'm afraid that a milky-white patch on the glass where the getter is, usually means that the vacuum is gone. Normally, the spot is shiny metal coloured (and it is shiny metal...)
> >
> > Raymond
> >
> > --- In hp_agilent_equipment@..., "fred" <fredschneider@> wrote:
> > >
> > > Thanks for all the tips and links
> > >
> > > Today it came in. It turns out to be a 9100B (but he has a A too) Inside it misses two indicator lamps but for the rest it looks complete and untouched. The only thing that worries me a lot is the CRT. It is transparant and the clamp that holds it is broken. Never seen a transparant CRT. You can see the getter, the Phosphor but I also see a white spot about 1" width and 1/2" high. It looks like it is under the getter but I do not hope this means the CRT is cracked...
> > >
> > > Stange thing is all the motorola transistors are painted red on top. Why ?
> > >
> > > Fred PA4TIM
> > >
> > > --- In hp_agilent_equipment@..., "Dave Brown" <tractorb@> wrote:
> > > >
> > > > Several years ago I dealt with some real experts in repair of this
> > > > calculator that are probably still accessible via the MOHPCalc site and
> > > > email lists.
> > > > Mine is yet again in need of repair following the earthquakes we had here a
> > > > year or two ago but I'm hopeful that it will go again despite the mechanical
> > > > damage to the case etc.
> > > > DaveB
> > > > Christchurch, NZ
> > > > PS- I have some rolls of the special paper used in the 9120A printer if your
> > > > friend has one of those. Not in perfect condition anymore but still useable.
> > > >
> > > > ----- Original Message -----
> > > > From: "fred" <fredschneider@>
> > > > To: <hp_agilent_equipment@...>
> > > > Sent: Thursday, November 08, 2012 9:08 AM
> > > > Subject: [hp_agilent_equipment] Repair HP 9100A calculator
> > > >
> > > >
> > > > > Tommorow a friend brings in a HP9100A for repair. It is in unknown working
> > > > > condition founded under a floor but optical inside/out in good shape. (
> > > > > and for me a sinclair multimeter and finaly I get a real HP35)
> > > > >
> > > > > I have plenty experience in repair ( most meaurement and radio stuff, from
> > > > > vector netork anlysers to digital multimeters, but I'm an analog guy)
> > > > >
> > > > > But this is a sort of "computer" without the CPU, ICs ect. So very new
> > > > > for me.
> > > > >
> > > > > It has torroid memory, a sort of multilayer PCB ROM and according to the
> > > > > owner about 300 transistors.
> > > > >
> > > > > Do some people here have experience and tips/advise with this piece of
> > > > > art. ( and HP history)
> > > > >
> > > > > Fred pa4tim
> > > > >
> > > > >
> > > > >
> > > > > ------------------------------------
> > > > >
> > > > > Yahoo! Groups Links
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > > --
> > > > This message has been scanned for viruses and
> > > > dangerous content by MailScanner, and is
> > > > believed to be clean.
> > > >
> > >
> >
>





[Non-text portions of this message have been removed]

----- Original Message -----
From: fred
To: hp_agilent_equipment@...
Sent: Saturday, November 10, 2012 1:05 PM
Subject: [hp_agilent_equipment] Re: Repair HP 9100A calculator




I do not know what a PDA electrode is, but there is nothing besides the pins that go in the socket on the rear. ( it is the electrode that is in front of oscilloscope tubes !)
--- In hp_agilent_equipment@..., "Tom Miller" <tmiller11147@...> wrote:
>
> Does the tube have a PDA electrode on the front?
>
>
> ----- Original Message -----
> From: fred
> To: hp_agilent_equipment@...
> Sent: Saturday, November 10, 2012 11:09 AM
> Subject: [hp_agilent_equipment] Re: Repair HP 9100A calculator
>
>
>
> Bad news.
> The CRT is dead, it is broken in two in the socket. :-(
> so this is the end I'm afraid.
>
> Its a HP-5083-1551
> 28cm long
> 5"diagonal (or 4,7"I do not know how they measure
> -3500V cathode, 6,3VAC heather
> 14 pin, 12 used (2 heather, cathode, 4 grids, 2 vertical and 2 horizontal plates.
>
> Maybe I can trace the signals somewhere and use an XY monitor so I can try the rest. If all works I can try to find a replacement (I'm not afraid for altering circuits or building interface circuits.
>
> There was an external monitor but the 9100 had to be modified and the 3 connection points are not connected. I can not find anything about the mod.
>
> Fred
>
> --- In hp_agilent_equipment@..., "raymonddompfrank" <raymond@> wrote:
> >
> > Just realized that I should have added that sometimes even in good tubes the patch can be partly whitish instead of mirror-like. Sorry to cause confusion.
> > I sincerely hope that the tube is ok because I guess a replacement would be very difficult to find.
> > A glowing heater would be proof of the vacuum being intact (and at least some of the PSU).
> >
> > Raymond
> >
> >
> > --- In hp_agilent_equipment@..., "raymonddompfrank" <raymond@> wrote:
> > >
> > > I'm afraid that a milky-white patch on the glass where the getter is, usually means that the vacuum is gone. Normally, the spot is shiny metal coloured (and it is shiny metal...)
> > >
> > > Raymond
> > >
> > > --- In hp_agilent_equipment@..., "fred" <fredschneider@> wrote:
> > > >
> > > > Thanks for all the tips and links
> > > >
> > > > Today it came in. It turns out to be a 9100B (but he has a A too) Inside it misses two indicator lamps but for the rest it looks complete and untouched. The only thing that worries me a lot is the CRT. It is transparant and the clamp that holds it is broken. Never seen a transparant CRT. You can see the getter, the Phosphor but I also see a white spot about 1" width and 1/2" high. It looks like it is under the getter but I do not hope this means the CRT is cracked...
> > > >
> > > > Stange thing is all the motorola transistors are painted red on top. Why ?
> > > >
> > > > Fred PA4TIM
> > > >
> > > > --- In hp_agilent_equipment@..., "Dave Brown" <tractorb@> wrote:
> > > > >
> > > > > Several years ago I dealt with some real experts in repair of this
> > > > > calculator that are probably still accessible via the MOHPCalc site and
> > > > > email lists.
> > > > > Mine is yet again in need of repair following the earthquakes we had here a
> > > > > year or two ago but I'm hopeful that it will go again despite the mechanical
> > > > > damage to the case etc.
> > > > > DaveB
> > > > > Christchurch, NZ
> > > > > PS- I have some rolls of the special paper used in the 9120A printer if your
> > > > > friend has one of those. Not in perfect condition anymore but still useable.
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "fred" <fredschneider@>
> > > > > To: <hp_agilent_equipment@...>
> > > > > Sent: Thursday, November 08, 2012 9:08 AM
> > > > > Subject: [hp_agilent_equipment] Repair HP 9100A calculator
> > > > >
> > > > >
> > > > > > Tommorow a friend brings in a HP9100A for repair. It is in unknown working
> > > > > > condition founded under a floor but optical inside/out in good shape. (
> > > > > > and for me a sinclair multimeter and finaly I get a real HP35)
> > > > > >
> > > > > > I have plenty experience in repair ( most meaurement and radio stuff, from
> > > > > > vector netork anlysers to digital multimeters, but I'm an analog guy)
> > > > > >
> > > > > > But this is a sort of "computer" without the CPU, ICs ect. So very new
> > > > > > for me.
> > > > > >
> > > > > > It has torroid memory, a sort of multilayer PCB ROM and according to the
> > > > > > owner about 300 transistors.
> > > > > >
> > > > > > Do some people here have experience and tips/advise with this piece of
> > > > > > art. ( and HP history)
> > > > > >
> > > > > > Fred pa4tim
> > > > > >
> > > > > >
> > > > > >
> > > > > > ------------------------------------
> > > > > >
> > > > > > Yahoo! Groups Links
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > > --
> > > > > This message has been scanned for viruses and
> > > > > dangerous content by MailScanner, and is
> > > > > believed to be clean.
> > > > >
> > > >
> > >
> >
>
>
>
>
>
>
>

--- In hp_agilent_equipment@..., "Tom Miller" <tmiller11147@...> wrote:

Yes, it is the "post deflection accelerator". Usually a HV wire or a button electrode in the glass.
Most o'scope tubes have this. I can't find any reference on the HP part you gave so it may be a rare tube.



----- Original Message -----
From: fred
To: hp_agilent_equipment@...
Sent: Saturday, November 10, 2012 1:05 PM
Subject: [hp_agilent_equipment] Re: Repair HP 9100A calculator




I do not know what a PDA electrode is, but there is nothing besides the pins that go in the socket on the rear. ( it is the electrode that is in front of oscilloscope tubes !)
--- In hp_agilent_equipment@..., "Tom Miller" <tmiller11147@> wrote:
>
> Does the tube have a PDA electrode on the front?
>
>
> ----- Original Message -----
> From: fred
> To: hp_agilent_equipment@...
> Sent: Saturday, November 10, 2012 11:09 AM
> Subject: [hp_agilent_equipment] Re: Repair HP 9100A calculator
>
>
>
> Bad news.
> The CRT is dead, it is broken in two in the socket. :-(
> so this is the end I'm afraid.
>
> Its a HP-5083-1551
> 28cm long
> 5"diagonal (or 4,7"I do not know how they measure
> -3500V cathode, 6,3VAC heather
> 14 pin, 12 used (2 heather, cathode, 4 grids, 2 vertical and 2 horizontal plates.
>
> Maybe I can trace the signals somewhere and use an XY monitor so I can try the rest. If all works I can try to find a replacement (I'm not afraid for altering circuits or building interface circuits.
>
> There was an external monitor but the 9100 had to be modified and the 3 connection points are not connected. I can not find anything about the mod.
>
> Fred
>
> --- In hp_agilent_equipment@..., "raymonddompfrank" <raymond@> wrote:
> >
> > Just realized that I should have added that sometimes even in good tubes the patch can be partly whitish instead of mirror-like. Sorry to cause confusion.
> > I sincerely hope that the tube is ok because I guess a replacement would be very difficult to find.
> > A glowing heater would be proof of the vacuum being intact (and at least some of the PSU).
> >
> > Raymond
> >
> >
> > --- In hp_agilent_equipment@..., "raymonddompfrank" <raymond@> wrote:
> > >
> > > I'm afraid that a milky-white patch on the glass where the getter is, usually means that the vacuum is gone. Normally, the spot is shiny metal coloured (and it is shiny metal...)
> > >
> > > Raymond
> > >
> > > --- In hp_agilent_equipment@..., "fred" <fredschneider@> wrote:
> > > >
> > > > Thanks for all the tips and links
> > > >
> > > > Today it came in. It turns out to be a 9100B (but he has a A too) Inside it misses two indicator lamps but for the rest it looks complete and untouched. The only thing that worries me a lot is the CRT. It is transparant and the clamp that holds it is broken. Never seen a transparant CRT. You can see the getter, the Phosphor but I also see a white spot about 1" width and 1/2" high. It looks like it is under the getter but I do not hope this means the CRT is cracked...
> > > >
> > > > Stange thing is all the motorola transistors are painted red on top. Why ?
> > > >
> > > > Fred PA4TIM
> > > >
> > > > --- In hp_agilent_equipment@..., "Dave Brown" <tractorb@> wrote:
> > > > >
> > > > > Several years ago I dealt with some real experts in repair of this
> > > > > calculator that are probably still accessible via the MOHPCalc site and
> > > > > email lists.
> > > > > Mine is yet again in need of repair following the earthquakes we had here a
> > > > > year or two ago but I'm hopeful that it will go again despite the mechanical
> > > > > damage to the case etc.
> > > > > DaveB
> > > > > Christchurch, NZ
> > > > > PS- I have some rolls of the special paper used in the 9120A printer if your
> > > > > friend has one of those. Not in perfect condition anymore but still useable.
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "fred" <fredschneider@>
> > > > > To: <hp_agilent_equipment@...>
> > > > > Sent: Thursday, November 08, 2012 9:08 AM
> > > > > Subject: [hp_agilent_equipment] Repair HP 9100A calculator
> > > > >
> > > > >
> > > > > > Tommorow a friend brings in a HP9100A for repair. It is in unknown working
> > > > > > condition founded under a floor but optical inside/out in good shape. (
> > > > > > and for me a sinclair multimeter and finaly I get a real HP35)
> > > > > >
> > > > > > I have plenty experience in repair ( most meaurement and radio stuff, from
> > > > > > vector netork anlysers to digital multimeters, but I'm an analog guy)
> > > > > >
> > > > > > But this is a sort of "computer" without the CPU, ICs ect. So very new
> > > > > > for me.
> > > > > >
> > > > > > It has torroid memory, a sort of multilayer PCB ROM and according to the
> > > > > > owner about 300 transistors.
> > > > > >
> > > > > > Do some people here have experience and tips/advise with this piece of
> > > > > > art. ( and HP history)
> > > > > >
> > > > > > Fred pa4tim
> > > > > >
> > > > > >
> > > > > >
> > > > > > ------------------------------------
> > > > > >
> > > > > > Yahoo! Groups Links
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > > --
> > > > > This message has been scanned for viruses and
> > > > > dangerous content by MailScanner, and is
> > > > > believed to be clean.
> > > > >
> > > >
> > >
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>





[Non-text portions of this message have been removed]

--- In hp_agilent_equipment@..., Harvey White <madyn@...> wrote:

On Sat, 10 Nov 2012 18:39:32 -0000, you wrote:

Yep, rare calculator, even more rare CRT. I must have a small CRT somewere ( smaller than this) I think for 600V but I will check. Voltages can be adapted and smaller allways fits for the time being. That could be a possible temporary solution and then I can test and repair the rest while the owner can search for the right tube ( he knows a lot calculator collectors and goes to a lot of fairs, searces on ebay ect. So he can have more luck)

Possibly so. One solution would be to have a very fast a/d and build
up an image on an XY LCD display.

I think I take my tek concepts book about CRT control and see if I can find a way to hook te horizontal, vertical and blancking to a XY monitor or scope. The 9100 has a vertical and horzontal defelection pcb. Very small, not much parts. Each board has two outputs ( left/right and up/down plates) so the signals that drives that amps must be usable.

Take a scope and run it in XY mode. The vertical and horizontal
signals are likely single ended and go into the deflection amplifiers.
A good scope should have both X, Y and Z inputs, but I'd watch the
voltages on the Z inputs for range excursions (you want to find the
point in the driving circuit that has about a 0 to 5 volt signal)

I'd start up the calculator with both X and Y connected to likely
points. Even without blanking, you'll get a good idea of what's going
on.

But it is a bit a chicken /egg Situation. I first must be able to strart it up to find thise signals and without a CRT i do not know if it is working. In a scope i can find my way because I know how they work but here is some prehistoric digital stuff going on in an analog way. It has about 300 transistors and hundereds of diodes and resistors.
Core memory, magnetic card reader and some fancy pcb made ROM. Besides that I have no clue how to operate it. So if the tube was OK i could reform caps, fire it up, check power supply rails, do the manual checks and probably get it to work but this makes a complicated case a bit too complicated.

Not as much complicated as you would think. An XY display is just
simply the driving amplifiers to the CRT, coupled with blanking.

An old scope would tell you what is going on, a more modern scope
would help you diagnose the problems, if any.

What you'll see for the driving signals ought to be a number of
stairstep signals, say a voltage between 0 and 5 volts or so, multiple
levels, and it ought to repeat.

As you press keys, it ought to change.

This would be the same for the vertical and horizontal signals.

Harvey

Fred

--- In hp_agilent_equipment@..., "Tom Miller" <tmiller11147@> wrote:

Yes, it is the "post deflection accelerator". Usually a HV wire or a button electrode in the glass.
Most o'scope tubes have this. I can't find any reference on the HP part you gave so it may be a rare tube.



----- Original Message -----
From: fred
To: hp_agilent_equipment@...
Sent: Saturday, November 10, 2012 1:05 PM
Subject: [hp_agilent_equipment] Re: Repair HP 9100A calculator




I do not know what a PDA electrode is, but there is nothing besides the pins that go in the socket on the rear. ( it is the electrode that is in front of oscilloscope tubes !)
--- In hp_agilent_equipment@..., "Tom Miller" <tmiller11147@> wrote:
>
> Does the tube have a PDA electrode on the front?
>
>
> ----- Original Message -----
> From: fred
> To: hp_agilent_equipment@...
> Sent: Saturday, November 10, 2012 11:09 AM
> Subject: [hp_agilent_equipment] Re: Repair HP 9100A calculator
>
>
>
> Bad news.
> The CRT is dead, it is broken in two in the socket. :-(
> so this is the end I'm afraid.
>
> Its a HP-5083-1551
> 28cm long
> 5"diagonal (or 4,7"I do not know how they measure
> -3500V cathode, 6,3VAC heather
> 14 pin, 12 used (2 heather, cathode, 4 grids, 2 vertical and 2 horizontal plates.
>
> Maybe I can trace the signals somewhere and use an XY monitor so I can try the rest. If all works I can try to find a replacement (I'm not afraid for altering circuits or building interface circuits.
>
> There was an external monitor but the 9100 had to be modified and the 3 connection points are not connected. I can not find anything about the mod.
>
> Fred
>
> --- In hp_agilent_equipment@..., "raymonddompfrank" <raymond@> wrote:
> >
> > Just realized that I should have added that sometimes even in good tubes the patch can be partly whitish instead of mirror-like. Sorry to cause confusion.
> > I sincerely hope that the tube is ok because I guess a replacement would be very difficult to find.
> > A glowing heater would be proof of the vacuum being intact (and at least some of the PSU).
> >
> > Raymond
> >
> >
> > --- In hp_agilent_equipment@..., "raymonddompfrank" <raymond@> wrote:
> > >
> > > I'm afraid that a milky-white patch on the glass where the getter is, usually means that the vacuum is gone. Normally, the spot is shiny metal coloured (and it is shiny metal...)
> > >
> > > Raymond
> > >
> > > --- In hp_agilent_equipment@..., "fred" <fredschneider@> wrote:
> > > >
> > > > Thanks for all the tips and links
> > > >
> > > > Today it came in. It turns out to be a 9100B (but he has a A too) Inside it misses two indicator lamps but for the rest it looks complete and untouched. The only thing that worries me a lot is the CRT. It is transparant and the clamp that holds it is broken. Never seen a transparant CRT. You can see the getter, the Phosphor but I also see a white spot about 1" width and 1/2" high. It looks like it is under the getter but I do not hope this means the CRT is cracked...
> > > >
> > > > Stange thing is all the motorola transistors are painted red on top. Why ?
> > > >
> > > > Fred PA4TIM
> > > >
> > > > --- In hp_agilent_equipment@..., "Dave Brown" <tractorb@> wrote:
> > > > >
> > > > > Several years ago I dealt with some real experts in repair of this
> > > > > calculator that are probably still accessible via the MOHPCalc site and
> > > > > email lists.
> > > > > Mine is yet again in need of repair following the earthquakes we had here a
> > > > > year or two ago but I'm hopeful that it will go again despite the mechanical
> > > > > damage to the case etc.
> > > > > DaveB
> > > > > Christchurch, NZ
> > > > > PS- I have some rolls of the special paper used in the 9120A printer if your
> > > > > friend has one of those. Not in perfect condition anymore but still useable.
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "fred" <fredschneider@>
> > > > > To: <hp_agilent_equipment@...>
> > > > > Sent: Thursday, November 08, 2012 9:08 AM
> > > > > Subject: [hp_agilent_equipment] Repair HP 9100A calculator
> > > > >
> > > > >
> > > > > > Tommorow a friend brings in a HP9100A for repair. It is in unknown working
> > > > > > condition founded under a floor but optical inside/out in good shape. (
> > > > > > and for me a sinclair multimeter and finaly I get a real HP35)
> > > > > >
> > > > > > I have plenty experience in repair ( most meaurement and radio stuff, from
> > > > > > vector netork anlysers to digital multimeters, but I'm an analog guy)
> > > > > >
> > > > > > But this is a sort of "computer" without the CPU, ICs ect. So very new
> > > > > > for me.
> > > > > >
> > > > > > It has torroid memory, a sort of multilayer PCB ROM and according to the
> > > > > > owner about 300 transistors.
> > > > > >
> > > > > > Do some people here have experience and tips/advise with this piece of
> > > > > > art. ( and HP history)
> > > > > >
> > > > > > Fred pa4tim
> > > > > >
> > > > > >
> > > > > >
> > > > > > ------------------------------------
> > > > > >
> > > > > > Yahoo! Groups Links
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > > > --
> > > > > This message has been scanned for viruses and
> > > > > dangerous content by MailScanner, and is
> > > > > believed to be clean.
> > > > >
> > > >
> > >
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>





[Non-text portions of this message have been removed]