The HP41 Corner

New 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
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amazon.fr
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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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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 (36) Compare	HP41 overlays Product no.: HP41cOverlay from 25.00 € * In stock (4) Compare	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. Black Friday: 20% off 12.80 € * Old price 16.00 € In stock (9) Compare
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 (1) Compare	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 (4) Compare	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 Compare
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 (2) Compare	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 (4) Compare	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 (3) Compare
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 (1) Compare