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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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more...@gmail.com

Sep 27

Anita MK 9 restoration - again

Hello! I have Anita MK 9, and I am trying to repair it for years. I have exchanged broken dekatron

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Anita MK 9 restoration - again

Hello! I have Anita MK 9, and I am trying to repair it for years. I have exchanged broken dekatron

Sep 27

Sep 17

Springs information

I'm currently working on a Brunsviga 13RK, and had to dismantle the rotor with its W-shaped

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Springs information

I'm currently working on a Brunsviga 13RK, and had to dismantle the rotor with its W-shaped

Sep 17

Sep 14

Marchant Deci-Magic Information

Greetings! I'm currently working on a Marchant Deci-Magic machine. Having some issues with

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Marchant Deci-Magic Information

Greetings! I'm currently working on a Marchant Deci-Magic machine. Having some issues with

Sep 14

jefo...@gmail.com, … Dennis Tuckerman19

Aug 26

Compucorp 326 Scientist -- repair info needed

I've always wondered whether the 'old' in 'oldcalculatorforum' applied to my

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Compucorp 326 Scientist -- repair info needed

I've always wondered whether the 'old' in 'oldcalculatorforum' applied to my

Aug 26

hossnerbiz, Adam Jones3

Jun 7

HP41-CV woke up dead

Adam - I'm back in business! I re-flowed all the solder joints, both ends of the connector

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HP41-CV woke up dead

Adam - I'm back in business! I re-flowed all the solder joints, both ends of the connector

Jun 7

Jun 7

Re: [oldcalculatorforum] Digest for oldcalculatorforum@googlegroups.com - 1 update in 1 topic

My apologies; the link in that previous reply should have been: HHC 2024 hhuc.us

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Re: [oldcalculatorforum] Digest for oldcalculatorforum@googlegroups.com - 1 update in 1 topic

My apologies; the link in that previous reply should have been: HHC 2024 hhuc.us

Jun 7

M. S., osa...@gmail.com4

Jun 4

TI SR-52 restoration problem

<https://www.hpmuseum.org/forum/thread-2804.html>

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TI SR-52 restoration problem

<https://www.hpmuseum.org/forum/thread-2804.html>

Jun 4

Charles Walag, … Tayyaba Mustafa5

Jun 1

Monroe 820 Calculator

A grade calculator is a tool designed to help students and educators quickly compute grades based on

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Monroe 820 Calculator

A grade calculator is a tool designed to help students and educators quickly compute grades based on

Jun 1

May 16

Sharp Calculator EL-8140 - Anyone collecting this type?

Hi all, Just doing some research on my old Sharp Calculator EL-8140 Anyone collecting this type? I

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Sharp Calculator EL-8140 - Anyone collecting this type?

Hi all, Just doing some research on my old Sharp Calculator EL-8140 Anyone collecting this type? I

May 16

Simon Crouch, … Helen May8

May 14

Lots of Anita Calculators

Hi. Of course, we will be interested as donation, as we have a very limited funding from volunteer

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Lots of Anita Calculators

Hi. Of course, we will be interested as donation, as we have a very limited funding from volunteer

May 14

Johannes Eggers

May 13

TI-2510 Repair: Schematic, anyone?

I'm trying to repair a TI2510 calculator. Vgg is "off" (only -7). Does anyone have a

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TI-2510 Repair: Schematic, anyone?

I'm trying to repair a TI2510 calculator. Vgg is "off" (only -7). Does anyone have a

May 13

May 11

Free Mechanical Calculators - you pick up in Bay Area

Hi gang, I have about a dozen mechanical calculators -- 5 Fridens (STW and related electric machines)

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Free Mechanical Calculators - you pick up in Bay Area

Hi gang, I have about a dozen mechanical calculators -- 5 Fridens (STW and related electric machines)

May 11

artro...@gmail.com, Nigel T2

May 11

Rapid Calculator

I am not very familiar with Rapid Calculators, however, here are a few sources of information that

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Rapid Calculator

I am not very familiar with Rapid Calculators, however, here are a few sources of information that

May 11

DandyDon “Xerox6085”

Apr 13

Manuals For Compucorp 485/LItton-Monroe 1830

Does anyone have scanned or otherwise user, programming or service documentation for the Compucorp

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Manuals For Compucorp 485/LItton-Monroe 1830

Does anyone have scanned or otherwise user, programming or service documentation for the Compucorp

Apr 13

Fuad Hirmas, … Nigel T4

Apr 12

Old Rema Model 1 Calculator

Dear Bart, thank you so much for your help. I will check all of them and try to learn as much as I

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Old Rema Model 1 Calculator

Dear Bart, thank you so much for your help. I will check all of them and try to learn as much as I

Apr 12

Paul W uk, … Pieter La Grange4

Apr 10

Schematics or service manuals needed

Hi Paul Do you still have your Facit 1125? I acquired one in 2022 and it also needs repairs. I also

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Schematics or service manuals needed

Hi Paul Do you still have your Facit 1125? I acquired one in 2022 and it also needs repairs. I also

Apr 10

Gabriel Baum, … osa...@gmail.com4

Apr 6

How big is your collection? I'm always open to donations :-) On Friday 5 April 2024 at 12:58:40

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How big is your collection? I'm always open to donations :-) On Friday 5 April 2024 at 12:58:40

Apr 6

Gabriel Baum, … Arthur Rosen4

Apr 5

Michael, I am not a collector of rare/vintage calculators. Instead, I was a collector of antique

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Michael, I am not a collector of rare/vintage calculators. Instead, I was a collector of antique

Apr 5

Mar 18

Re: [oldcalculatorforum] Digest for oldcalculatorforum@googlegroups.com - 1 update in 1 topic

Standard AA nickel-cadmium batteries. Modern LiIon would probably work but why take the chance? On

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Re: [oldcalculatorforum] Digest for oldcalculatorforum@googlegroups.com - 1 update in 1 topic

Standard AA nickel-cadmium batteries. Modern LiIon would probably work but why take the chance? On

Mar 18

Mar 17

TI SR-10 battery

Hi, I've just purchased a very nice SR-10 like the one I bought in high school. :) The seller

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TI SR-10 battery

Hi, I've just purchased a very nice SR-10 like the one I bought in high school. :) The seller

Mar 17

Thomas Plummer, osa...@gmail.com20

Feb 28

Original TI30 circa 1977 key bounce problem

Well done. You have good observation and troubleshooting skill. Thomas C Plummer Whaling and

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Original TI30 circa 1977 key bounce problem

Well done. You have good observation and troubleshooting skill. Thomas C Plummer Whaling and

Feb 28

Louis Angelucci

Feb 22

ti vintage calculators

I have been a collector of vintage calculators for some time. It has been a fascination of mine to

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ti vintage calculators

I have been a collector of vintage calculators for some time. It has been a fascination of mine to

Feb 22

René Henry, machine a calculer5

Feb 18

do you have informations about this appliance : GAB-KA by Zephyr C° ?

Merci pour le tuyau et mes salutation à madame :-) Le dim. 18 févr. 2024 à 18:45, 'machine a

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do you have informations about this appliance : GAB-KA by Zephyr C° ?

Merci pour le tuyau et mes salutation à madame :-) Le dim. 18 févr. 2024 à 18:45, 'machine a

Feb 18

Jan 26

TI-30X Pro MultiView: white inlet card available ?

Hello, is there anyone who can sell me this "short cuts" card that is placed in the back

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TI-30X Pro MultiView: white inlet card available ?

Hello, is there anyone who can sell me this "short cuts" card that is placed in the back

Jan 26

Don Miffitt, … hossnerbiz6

Jan 16

Has anyone seen this Bowmar calculator before. I cannot find on the web about it. It may be a prototype that never went into production. There are no labels on the back.

Hi Steve, That makes sense. Thanks for your help. Best Regards, Don On Tue, Jan 16, 2024 at 1:15 PM

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Has anyone seen this Bowmar calculator before. I cannot find on the web about it. It may be a prototype that never went into production. There are no labels on the back.

Hi Steve, That makes sense. Thanks for your help. Best Regards, Don On Tue, Jan 16, 2024 at 1:15 PM

Jan 16

Mike Kauzlarich, hossnerbiz2

Jan 7

Haverhill Multator 4, NIB needs a home

Mike - I'm interested and I sent you an email. Thanks! Steve

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Haverhill Multator 4, NIB needs a home

Mike - I'm interested and I sent you an email. Thanks! Steve

Jan 7

Jan 7

Re: [oldcalculatorforum] Digest for oldcalculatorforum@googlegroups.com - 1 update in 1 topic

I'd be interested in this machine, but email sent to “the...@comcast.com” bounces with a “User

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Re: [oldcalculatorforum] Digest for oldcalculatorforum@googlegroups.com - 1 update in 1 topic

I'd be interested in this machine, but email sent to “the...@comcast.com” bounces with a “User

Jan 7

christophe mery

12/18/23

HP33s et 2 HP35

Bonjour L'un d'entre vous serait-il intéressé par l'une de ces deux machines Merci

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HP33s et 2 HP35

Bonjour L'un d'entre vous serait-il intéressé par l'une de ces deux machines Merci

12/18/23

Generalissimo Rahman, Thomas Kirchhof3

11/17/23

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

11/17/23

Dennis Tuckerman, osa...@gmail.com2

11/15/23

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

11/15/23

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