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The HP41 Corner

The HP41 Corner

hprepairbigNew book from The Calculator Store: HP41 Repair: A Beginner's Guide to Repairing your HP41 Calculator. 14.00€ paperback version, 9.99 Kindle version. Only in Amazon

We have been told that the book is not visible in some of the amazon websites worldwide. Here we offer links to all of them:

amazon.com
amazon.co.uk
amazon.de
amazon.fr
amazon.es
Amazon.it

Kindle and paperback versions available now!

The HP41c calculator, produced from 1979 until 1990, was the standard in engineering and sciences during most of its life. Programmable, alphanumeric, with a high contrast LCD screen, and expandable, it was a true computer in your pocket. Here is our web hommage to it.

Its capabilities could be extended by means of ROM modules with additional functions, and with interfaces it could use printers, plotters, mass storage devices, bar code readers, measurement instruments, etc.

Recently, the user community has developed both new software in ROMs (like the Sandmath family) and hardware: a circuit that substitutes the original and throroughly updates the calculator in terms of speed, memory and functions, including all known modules ever developed (the HP41CL from Monte Dalrymple)


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Zebra + Lower post

Product no.: zebra+lowerpost

Set of zebra + lower post repair piece

26.00 *
Old price 41.00 €
In stock

Assembled HP-41c battery bay and expansion ports module

Product no.: Flex-PCB Assembled

Assembled module for the often damaged flexible PCB in the battery bay (and I/O ports) of the HP-41c range of calculators. Shipping included in price for EU customers.

 

44.00 *
Old price 55.00 €
In stock
can be shipped within 10 days

New Lower Post Repair part

Product no.: Lowpostrepair

Piece to repair HP41c full nut series lower screw posts

16.00 *
In stock

New Upper Post Repair part

Product no.: UpperPostRepair

Piece to repair HP41c series upper screw posts (tested with both fullnut and halfnut versions)

16.00 *
In stock

Assembled HP-41c battery bay and expansion ports module Flat

Product no.: Flex-PCB AssembledFlat

Assembled module for the often damaged flexible PCB in the battery bay (and I/O ports) of the HP-41c range of calculators. Shipping included in price for EU customers.

This is the FLAT version, when the screw head domes are broken and grinded down - see pictures.

Black Friday: 20% off

44.00 *
Old price 55.00 €
In stock

Battery holder 3D

Product no.: Battery holder 3D

Battery holder case for the HP41 family of calculators, made with 3D printing and springs in stainless steel 304 alloy

30.00 *
Old price 35.00 €
In stock

HP41c battery holder spring

Product no.: Spring

Stainless steel 304 springs for HP41C battery holder

3.00 *
In stock

Sponge for HP41c standard case

Product no.: Esponja

Sponge for the standard HP41c vinyl case

2.00 *
In stock

Piece for repair of back case of HP41C

Product no.: brokenback

1 Piece for repairing HP41c back cases.

This piece is for repair of HP41c back halves, specifically the support of the upper screw heads that is often damaged, and very difficult to repair in a lasting way.

 

17.00 *
In stock

New HP41c side cover

Product no.: Side Cover

HP41c side cover.

Black Friday: 25% off

6.00 *
Old price 8.00 €
In stock

New Repair kit for HP-41c battery bay and expansion ports

Product no.: Flex-PCB

Adhesive circuit for the often damaged flexible PCB in the battery bay (and I/O ports) of the HP-41c range of calculators. Shipping included in price.

Black Friday: 25% off

22.00 *
Old price 26.00 €
In stock

HP41 overlays

Product no.: HP41cOverlay
from 25.00 *
In stock

New Zebra connector for HP41C repair

Product no.: Zebra PCB

This piece is for repair of HP41c full nut calculator, substituting the damaged or corroded zebra connector that links the main board with the processor circuit. New design.

16.00 *
In stock

lower post long screw - inox

Product no.: lowerscrew

Two long screw for the lower screw posts of HP41c calculators

1.00 / 2 piece(s) *
In stock

New Set of 4 screw for HP41 - inox

Product no.: Screwset

Two long screw for the lower screw posts of HP41c calculators + two long screws for upper posts.

3.00 / 4 piece(s) *
In stock

lower post long screw - black pair

Product no.: lowerscrewblack

Two long screw for the lower screw posts of HP41c calculators - black

4.00 / 2 piece(s) *
In stock

Spacer set for repairing old HP41c

Product no.: SpacerSet

Set of 8 pairs of spacers for nut-screwed full-nut HP41c calculators. Substitutes the nuts that are screwed on the lower posts to secure the circuit, 

10.00 *
In stock

New HP41c Lower Post Repair Kit

Product no.: Lower Post Repair Kit

Set of pieces needed to repair successfully the lower posts of HP41C, 41CV and 41CX full nut calculators, including zebra connectors, lower post part, and keyboard support for clothes' pegs to protect the keyboard

40.00 *
Old price 70.00 €
In stock

New HP41c Port cover - 3D

Product no.: Port cover 3D

HP41c back port cover - 3D, new - set of 4.

Black Friday: 20% off

19.20 / 4 piece(s) *
Old price 24.00 €
In stock

Repaired HP41c back side

Product no.: HP41Cback

Repaired back side of HP41c. It can be used in case the original backside has the screw supports broken.

40.00 *
Not in stock

4 x Piece for repair of back case of HP41C

Product no.: brokenback4

4 pieces for repairing HP41c back cases.

This piece is for repair of HP41c back halves, specifically the support of the upper screw heads that is often damaged, and very difficult to repair in a lasting way.

 

50.00 *
Old price 72.00 €
In stock

Thermal Paper for HP Printer - single roll

Product no.: HP-82175

Thermal Paper for HP calculator printers: (HP 82240a & b, HP-92 & HP-97, 82143a & HP-IL printer) single roll

5.00 *
In stock

Memory module for HP41c - USED

Product no.: HP Memory

Memory for HP41c calculators (64 registers)

15.00 *
Not in stock

Quad Memory module for HP41c - USED

Product no.: HP Quad Memory

Quad Memory for HP41c calculators (256 registers)

30.00 *
Not in stock

Full-nut processor

Full-nut processor - please select C or CV type, or installation in your machine

Waiting for new units

15.00 *

Keyboard support for repairs

Product no.: keyboard support

Piece required for the lower post repair of HP41c calculators.

25.00 *
In stock

Navigation Pac for HP41c - USED

Product no.: HP Navigation Pac

Navigation Pac for HP41c calculators 

60.00 *
Not in stock

Math Module

Product no.: MathPac

Math Module for HP41c

40.00 *
In stock

Financial Pac for HP41c - USED

Product no.: HP Financial Pac

Financial Pac for HP41c calculators 

45.00 *
In stock

Stat 1 module

Product no.: Stat
45.00 *
In stock

Stat Module

Product no.: Stat module

Stat Module

45.00 *
In stock

Feet for HP41c HP41cv HP41cx calculators - set of 4

Product no.: feet41c

Adhesive black silicone feet for HP41c HP41cv HP41cx calculators

4.00 / 4 piece(s) *
In stock

10nF capacitor

Product no.: 10nFcap

10nF Capacitor to solder close to the screen of HP41c units before serial number 1954A to be able to use different processors (including the CL circuit by Monte Dalrymple) - 50v

0.75 *
In stock

Card reader repair

Product no.: card reader repair

Card reader repair

60.00 *

Surveying I module - USED

Product no.: Surveying module USED

HP Surveying module - tested with manual

40.00 *
In stock

Machine Design Module

Product no.: Machine Design

Machine design Pac for HP41c calculators 

60.00 *
Not in stock

Home Management Module

Product no.: Home management

Home Management Pac for HP41c calculators 

50.00 *
In stock

Real Estate Module

Product no.: Real Estate Module

Real Estate Module for HP41c calculators 

50.00 *
In stock

Standard Pac para HP41c/cv/cx - USED

Product no.: Standard Pac2

Standard pac with manual

50.00 *
Old price 70.00 €
Not in stock

Card reader side-locks

Product no.: cardreader sidelocks

3D printed HP82104A card reader side-locks - set of left and right locks

25.00 / 2 piece(s) *
In stock

Games Module

Product no.: Games Module

Games Module for HP41c calculators 

50.00 *
Not in stock

* Prices include VAT

HP 41C Repair

HP 41C Repair

HP41c Repair

HP_41c_Modules

HP_41c_Modules

The modules we have now available in stock for the HP41 family of calculators

HP41c Card reader

HP41c Card reader

Produtcs related to the HP82104A card reader for the HP41c family