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Welcome to the Old Calculator Forum for discussion of mechanical and early electronic calculators, especially those of the time of rapid technical development before 1980.
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Generalissimo Rahman
,
Thomas Kirchhof
3
Nov 17
New Resulta B7!
Thanks for the information! I'm excited to try it out! On Friday, November 17, 2023 at 5:48:31 AM
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New Resulta B7!
Thanks for the information! I'm excited to try it out! On Friday, November 17, 2023 at 5:48:31 AM
Nov 17
Dennis Tuckerman
,
osa...@gmail.com
2
Nov 15
TI SR-56 Calculator
Question asked on another forum, replies: “it's likely been damaged by plugging the AC adapter in
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TI SR-56 Calculator
Question asked on another forum, replies: “it's likely been damaged by plugging the AC adapter in
Nov 15
La Greenall
, …
osa...@gmail.com
119
Nov 14
Re: [oldcalculatorforum] Singer 1207 calculator (circa 1975) question
I am applying the voltage to the battery inputs. It's the calculator circuitry. I have a broken
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Re: [oldcalculatorforum] Singer 1207 calculator (circa 1975) question
I am applying the voltage to the battery inputs. It's the calculator circuitry. I have a broken
Nov 14
jefo...@gmail.com
,
La Greenall
3
Oct 30
Compucorp 326 Scientist -- repair info needed
Dear Lawrence, Many sincere thanks for your quick and extensive reply. This is very much appreciated.
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Compucorp 326 Scientist -- repair info needed
Dear Lawrence, Many sincere thanks for your quick and extensive reply. This is very much appreciated.
Oct 30
M. S.
, …
La Greenall
7
Oct 4
Friden S10 gears
Hi Lawrence, Thank a lot for the tips and links. Very useful and interesting information indeed! My
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Friden S10 gears
Hi Lawrence, Thank a lot for the tips and links. Very useful and interesting information indeed! My
Oct 4
Vaclav Zajic
2
Sep 26
Sharp PC -1246S - switch from DEG to RAD
I have found it out. It is necessary to type "RADIAN" <ENTER>. :-) Vaclav On Tuesday,
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Sharp PC -1246S - switch from DEG to RAD
I have found it out. It is necessary to type "RADIAN" <ENTER>. :-) Vaclav On Tuesday,
Sep 26
J Hall
, …
La Greenall
10
Sep 24
Singer 1207 pocket calculator question (model circa 1975)
Thanks so much -- all of this is extremely helpful. I have to say, I'm a complete novice
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Singer 1207 pocket calculator question (model circa 1975)
Thanks so much -- all of this is extremely helpful. I have to say, I'm a complete novice
Sep 24
Damien B
,
John Scriven
5
Sep 11
Brunsviga 13 ZK frozen stuck carriage
After a lot of WD-40 spraying, brushing the rails with acetone, and not-gentle-anymore hammering, the
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Brunsviga 13 ZK frozen stuck carriage
After a lot of WD-40 spraying, brushing the rails with acetone, and not-gentle-anymore hammering, the
Sep 11
Sarah Ward
, …
La Ymir Gryffindor
3
Aug 9
Looking to get rid of my dads old HP calculators
Your first step needs to be to research the models. Google them and also search for them on eBay to
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Looking to get rid of my dads old HP calculators
Your first step needs to be to research the models. Google them and also search for them on eBay to
Aug 9
Tanguy
,
Paulos, Richard G
3
Aug 9
Request about a specific calculator switch...
Hi Rick, Thanks for responding so quickly. They do indeed look very similar, but they are different (
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Request about a specific calculator switch...
Hi Rick, Thanks for responding so quickly. They do indeed look very similar, but they are different (
Aug 9
Stefan Lyon
Aug 5
WANTED: Friden RBT (or RSC, RSQ, RSR)
(Photo courtesy of a Twitter user) Hello everyone! I'm a Friden enthusiast, researcher and
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WANTED: Friden RBT (or RSC, RSQ, RSR)
(Photo courtesy of a Twitter user) Hello everyone! I'm a Friden enthusiast, researcher and
Aug 5
artro...@gmail.com
, …
Laszlo Kery
4
Jul 24
Pinwheel Gimme Natalis & Co Braunschweig repair
"move it somehow" does not mean "brute force" for me. Just 1N (one Newton) force
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Pinwheel Gimme Natalis & Co Braunschweig repair
"move it somehow" does not mean "brute force" for me. Just 1N (one Newton) force
Jul 24
Douglas Miller
,
osa...@gmail.com
3
Jul 3
HP-45 looking for a good home
Hi Owen, Did you get my reply to your private message? Maybe check your spam folder. It looks like
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HP-45 looking for a good home
Hi Owen, Did you get my reply to your private message? Maybe check your spam folder. It looks like
Jul 3
James McCosh
,
Martin VE3OAT
6
Jul 2
Anita 1021
Hi, James, Were you able to find a power cord for your Anita 1021 calculator? Is it the same as I
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Anita 1021
Hi, James, Were you able to find a power cord for your Anita 1021 calculator? Is it the same as I
Jul 2
Christophe Mery
, …
Arthur Rosen
6
Jul 1
mercedes euklid 7 et 8
I don't recall however if I had them, it would have gone with the machine. Did you try Googling
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mercedes euklid 7 et 8
I don't recall however if I had them, it would have gone with the machine. Did you try Googling
Jul 1
Nigel T
Jun 30
Rivendell Cinetron calculator/counter
Does anyone have any information about this device which incorporates a Sinclair Oxford 100
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Rivendell Cinetron calculator/counter
Does anyone have any information about this device which incorporates a Sinclair Oxford 100
Jun 30
Louis Angelucci
May 20
tI calculators
I have a number of TI calculators different models all working. I also have a number of TI-55
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tI calculators
I have a number of TI calculators different models all working. I also have a number of TI-55
May 20
Michael Earnhardt
, …
calcucris
8
May 8
1800s Strange Mystery Device- Possible Early Mechanical Calculator?
Hello Cris! I have posted some additional photos to this thread. You mention how it appears this
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1800s Strange Mystery Device- Possible Early Mechanical Calculator?
Hello Cris! I have posted some additional photos to this thread. You mention how it appears this
May 8
John Stodden
Apr 26
Hexadecimal addiator wanted
I am keen to buy a hex addiator. I believe Hexco and IBM both made one many years ago. Like a normal
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Hexadecimal addiator wanted
I am keen to buy a hex addiator. I believe Hexco and IBM both made one many years ago. Like a normal
Apr 26
Manfred
,
Friedrich
3
Apr 24
Walther Duplex 332
Hello Friedrich Thank you for your information. I have already found these documents. The operation
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Walther Duplex 332
Hello Friedrich Thank you for your information. I have already found these documents. The operation
Apr 24
Dale King
,
Ed Spittles
3
Apr 23
Tiger Accumulator Help
Thank you. Unfortunately, I can't find a mark on either of the gears in the Tiger. On Sunday,
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Tiger Accumulator Help
Thank you. Unfortunately, I can't find a mark on either of the gears in the Tiger. On Sunday,
Apr 23
Darren Lo
,
machineacalculer
3
Mar 25
Wanted: detent springs for a TIM Unitas
For reference, these are the broken parts. The detail shown is the upper rear of the lower carriage
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Wanted: detent springs for a TIM Unitas
For reference, these are the broken parts. The detail shown is the upper rear of the lower carriage
Mar 25
Bruce Benoit
Mar 20
Commodore SR 350 handheld scientific calculator
Does anyone know where I can get more information on this model? Year made, value? Bruce
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Commodore SR 350 handheld scientific calculator
Does anyone know where I can get more information on this model? Year made, value? Bruce
Mar 20
RJC239177
, …
Matthew Mawson
4
Mar 8
Value 1970's Casio desktop calculator
Hi Ryan I managed to pick up one of these machines cheap off Facebook market place mid last year for
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Value 1970's Casio desktop calculator
Hi Ryan I managed to pick up one of these machines cheap off Facebook market place mid last year for
Mar 8
David Ramsey
,
Mott Rex
3
Feb 28
Re: [oldcalculatorforum] Digest for oldcalculatorforum@googlegroups.com - 1 update in 1 topic
Made my own four cell Ni Cad soldered them and reconnected to the board and now works like a charm!
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Re: [oldcalculatorforum] Digest for oldcalculatorforum@googlegroups.com - 1 update in 1 topic
Made my own four cell Ni Cad soldered them and reconnected to the board and now works like a charm!
Feb 28
Had Robinson
, …
Keith Kennaugh
5
Feb 27
Replacement gears
Have you tried 3d printing? You may need resin bath rather than FDM. On Sun, 26 Feb 2023 at 20:36,
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Replacement gears
Have you tried 3d printing? You may need resin bath rather than FDM. On Sun, 26 Feb 2023 at 20:36,
Feb 27
Leonard Butcher
, …
Mott Rex
9
Feb 26
12 digit LED displays required for Commodore calculators
Hi you can't buy new, I unclip bubble and make a boarder/wall and pour in a duplicating gel. Once
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12 digit LED displays required for Commodore calculators
Hi you can't buy new, I unclip bubble and make a boarder/wall and pour in a duplicating gel. Once
Feb 26
Alan Bailey
,
Timothy R Grainger
2
Feb 26
Anyone know about old Texas Instruments Calculators?
http://www.vintagecalculators.com/html/texas_instruments_2500.html#TI2500-2 This has lots of info..
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Anyone know about old Texas Instruments Calculators?
http://www.vintagecalculators.com/html/texas_instruments_2500.html#TI2500-2 This has lots of info..
Feb 26
Timothy R Grainger
Feb 23
Texas datamat II not working
Hi first time poster, as in title my recently acquired datamat TI 2500 isn't firing up. I know
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Texas datamat II not working
Hi first time poster, as in title my recently acquired datamat TI 2500 isn't firing up. I know
Feb 23
mg
, …
machineacalculer
18
Feb 8
Mechanical calculator repair manuals uploaded to archive.org
Bonjour Tu dois pouvoir trouver des informations sur mon site www.machineacalculer.fr Onglet "
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Mechanical calculator repair manuals uploaded to archive.org
Bonjour Tu dois pouvoir trouver des informations sur mon site www.machineacalculer.fr Onglet "
Feb 8