12 Aug
2002
12 Aug
'02
9:56 a.m.
Ed asked,
Another question, more or less OT, is there someone who
kan help me with
an
Texas Instruments adapter/charger for a TI-59 (red led, magnetic card
reader etc),
preferable 220V, but 110V will do too.
Thanks,
Ed
Somewhere in my closet - I think - is a TI-59 in need of repair (display
problems, really bad keybounce problems, ni-cads need replacing). It has at
least a 110V adaptor and a 12V adaptor, and *possibly* a spare 110V adaptor
(I think I ordered the spare when the cable on the original got very flaky,
then repaired the cable.) Let me know if this is the closest/best help you
can find.
- Mark
12 Aug
12 Aug
12:04 p.m.
Hello Mark,
If you want to depart with the described items, I can surely use them. Some
parts of the calculator are good for spares like the pack, the reader and the
housing.
How much do you want for it?
Thanks,
Ed
Mark Tapley wrote:
Ed asked,
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Another question, more or less OT, is there
someone who kan help me with
an
Texas Instruments adapter/charger for a TI-59 (red led, magnetic card
reader etc),
preferable 220V, but 110V will do too.
Thanks,
Ed
Somewhere in my closet - I think - is a TI-59 in need of repair (display
problems, really bad keybounce problems, ni-cads need replacing). It has at
least a 110V adaptor and a 12V adaptor, and *possibly* a spare 110V adaptor
(I think I ordered the spare when the cable on the original got very flaky,
then repaired the cable.) Let me know if this is the closest/best help you
can find.
- Mark 
2:52 p.m.
Hi,
Mark Tapley <mtapley(a)swri.edu> said:
Ed asked,
Failing that, if you can find the right connector (possibly from another
TI calc PSU) the TI-59 requires 6.2V 200mA AC.
I always wanted a TI-59, but I have to make do with a -58...
Hardware info is available at: http://xgistor.ath.cx
--
Cheers,
Stan Barr stanb(a)dial.pipex.com
The future was never like this!
Another question, more or less OT, is there
someone who kan help me with
an
Texas Instruments adapter/charger for a TI-59 (red led, magnetic card
reader etc),
preferable 220V, but 110V will do too.
Thanks,
Ed
Somewhere in my closet - I think - is a TI-59 in need of repair (display
problems, really bad keybounce problems, ni-cads need replacing). It has at
least a 110V adaptor and a 12V adaptor, and *possibly* a spare 110V adaptor
(I think I ordered the spare when the cable on the original got very flaky,
then repaired the cable.) Let me know if this is the closest/best help you
can find. 
6:47 p.m.
More specifically at:
http://xgistor.ath.cx/ti59.htm
The diagram on this page shows
that you can use any adaptor that
can deliver 6.2 volts at 200ma AC will
do.The rectifier section is on the calc
so polarity is not an issue.... However
getting the right connector could be
a problem
Sipke de Wal
--------------------------------------
main page: http://xgistor.ath.cx
--------------------------------------
----- Original Message -----
From: "Stan Barr" <stanb(a)dial.pipex.com>
To: <cctalk(a)classiccmp.org>
Sent: Monday, August 12, 2002 7:54 PM
Subject: Re: TI-59 question
Hi,
Mark Tapley <mtapley(a)swri.edu> said:
Ed asked,
Failing that, if you can find the right connector (possibly from another
TI calc PSU) the TI-59 requires 6.2V 200mA AC.
I always wanted a TI-59, but I have to make do with a -58...
Hardware info is available at: http://xgistor.ath.cx
--
Cheers,
Stan Barr stanb(a)dial.pipex.com
The future was never like this!
Another question, more or less OT, is there
someone who kan help me with
an
Texas Instruments adapter/charger for a TI-59 (red led, magnetic card
reader etc),
preferable 220V, but 110V will do too.
Thanks,
Ed
Somewhere in my closet - I think - is a TI-59 in need of repair (display
problems, really bad keybounce problems, ni-cads need replacing). It has at
least a 110V adaptor and a 12V adaptor, and *possibly* a spare 110V adaptor
(I think I ordered the spare when the cable on the original got very flaky,
then repaired the cable.) Let me know if this is the closest/best help you
can find. 
11:37 p.m.
At 06:54 PM 8/12/02 +0100, you wrote:
Failing that, if you can find the right connector
(possibly from another
TI calc PSU) the TI-59 requires 6.2V 200mA AC.
I always wanted a TI-59, but I have to make do with a -58...
You can probably build something with epoxy/rubber and a couple
of pins off a female DB-25 connector..
A word of caution: if you are going to build a charger with a 6.3V
transformer, keep in mind that the chargers that TI provided
for this and other calculators had very high secondary winding
resistances; I just measured mine, and it is 16 ohms. I have
no idea about the reactance, though.
The high resistance in effect limits the maximum current across
the rectifier diodes and battery. I suspect that if you connect
a < 3ohm transformer something might burn.
carlos.
--------------------------------------------------------------
Carlos E. Murillo-Sanchez carlos_murillo(a)nospammers.ieee.org
13 Aug
13 Aug
11:20 a.m.
Fair enough ....
That would still leave about 8 volts after double-phase
rectification to charge the nicads with. (thru a 4.7ohm
internal resistor)
Never operate the TI59 without the nicads! when
the machine is turned on the excess voltage
will be dumpt into them so the -vbat will be kept at
-3.7 Volts! To operate it without nicads might
toast the machine !!!!
Sipke de Wal
-------------------------------------------------
http://xgistor.ath.cx
-------------------------------------------------
----- Original Message -----
From: "Carlos Murillo" <carlos_murillo(a)epm.net.co>
To: <cctalk(a)classiccmp.org>
Sent: Tuesday, August 13, 2002 6:35 AM
Subject: Re: TI-59 question
At 06:54 PM 8/12/02 +0100, you wrote:
Failing that, if you can find the right connector
(possibly from another
TI calc PSU) the TI-59 requires 6.2V 200mA AC.
I always wanted a TI-59, but I have to make do with a -58...
You can probably build something with epoxy/rubber and a couple
of pins off a female DB-25 connector..
A word of caution: if you are going to build a charger with a 6.3V
transformer, keep in mind that the chargers that TI provided
for this and other calculators had very high secondary winding
resistances; I just measured mine, and it is 16 ohms. I have
no idea about the reactance, though.
The high resistance in effect limits the maximum current across
the rectifier diodes and battery. I suspect that if you connect
a < 3ohm transformer something might burn.
carlos.
--------------------------------------------------------------
Carlos E. Murillo-Sanchez carlos_murillo(a)nospammers.ieee.org
3:41 p.m.
On Tue, 13 Aug 2002, Sipke de Wal wrote:
Never operate the TI59 without the nicads! when
the machine is turned on the excess voltage
will be dumpt into them so the -vbat will be kept at
-3.7 Volts! To operate it without nicads might
toast the machine !!!!
s/might/will
Did it by accident once. Luckily, about a month later, a TI59 (the
previous one was a 58) showed up at a Boeing company auction for $5 on the
print cradle. Nicad in the print cradle was toast though.
--
Kris Kirby, KE4AHR <kris(a)nospam.catonic.net> TGIFreeBSD IM: 'KrisBSD'
"BIG BROTHER IS WATCHING YOU!"
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6 comments
6 participants
participants (6)
-
carlos_murillo＠epm.net.co -
kris＠catonic.net -
mtapley＠swri.edu -
quapla＠xs4all.nl -
sipke＠wxs.nl -
stanb＠dial.pipex.com